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Longer titles found: Angular diameter distance (view)

searching for Angular diameter 133 found (429 total)

119 Tauri (1,341 words) [view diff] exact match in snippet view article find links to article

in the constellation Taurus. It is a semiregular variable and its angular diameter has been measured at about 10 mas. It is a similar star to Betelgeuse

Solar Saros 135 (291 words) [view diff] exact match in snippet view article find links to article

its angular diameter nearly as large as possible). This occurs around January 3. The Moon being nearly exactly at apogee (making its angular diameter as

NGC 3228 (316 words) [view diff] exact match in snippet view article find links to article

its center. Klarchenko et al. mention 53 possible members within the angular diameter of the cluster. The tidal radius of the cluster is 1.4 – 5.5 parsecs

RX Telescopii (601 words) [view diff] exact match in snippet view article find links to article

corresponding to a much smaller radius of 339 R☉ using the angular diameter. From an angular diameter of 3.734 milliarcseconds and a distance of 844.6156 parsecs

IC 348 (436 words) [view diff] exact match in snippet view article find links to article

associated 2-million-year-old cluster of roughly 400 stars within an angular diameter of 20″. The most massive stars in the cluster are the binary star system

Soap Bubble Nebula (279 words) [view diff] exact match in snippet view article find links to article

imaged PN G75.5+1.7 on July 17, 2008. The nebula measures 260″ in angular diameter with a central star that has a J band magnitude of 19.45. Jurasevich

Shapley 1 (236 words) [view diff] exact match in snippet view article find links to article

center of the nebula is a magnitude 14 white dwarf star. It has an angular diameter of 1.1 arc minutes, which makes it about one-third (.32) of a light

Messier 80 (674 words) [view diff] exact match in snippet view article find links to article

telescopes, appearing as a mottled ball of light. It has an apparent angular diameter of about 10 arcminutes. Since it is 32,600 light-years (10,000 pc)

V602 Carinae (753 words) [view diff] exact match in snippet view article find links to article

distance, and a larger radius of 1,050±165 R☉ based on the measured angular diameter and luminosity. An effective temperature of 3,432±280 K was then calculated

V5668 Sagittarii (703 words) [view diff] exact match in snippet view article find links to article

and the mass of the entire shell to be 2.7 to 5.4 × 10−5 M☉ . The angular diameter of the dust shell was estimated to be 42 milliarcsec which, along with

Astronomy on Mars (3,524 words) [view diff] exact match in snippet view article find links to article

partial eclipses of the Sun by Phobos, since the angular diameter of Phobos is up to half the angular diameter of the Sun. However, in the case of Deimos the

Nebula (2,845 words) [view diff] exact match in snippet view article find links to article

Nebula, the brightest nebula in the sky and occupying an area twice the angular diameter of the full Moon, can be viewed with the naked eye but was missed by

Messier 38 (519 words) [view diff] exact match in snippet view article find links to article

effort to find a geometrical figure. At its distance of 1066 pc., its angular diameter of about 20 arc minutes corresponds to about 4.0 parsecs (13 light

X Cancri (750 words) [view diff] exact match in snippet view article find links to article

that the star also pulsates with periods of 350 and 1,870 days. The angular diameter of X Cancri has been measured using both lunar occultations and very

3 Geminorum (756 words) [view diff] exact match in snippet view article find links to article

Observations of these occultations can give information about the angular diameter of a star, or about close companions. Occultations of 3 Geminorum have

Intensity interferometer (258 words) [view diff] exact match in snippet view article find links to article

of such an astronomical interferometer is to determine the apparent angular diameter of a radio source or star. If the distance to the object can then be

VY Canis Majoris (6,620 words) [view diff] exact match in snippet view article find links to article

measurements of the radius at infrared (K-band = 2.2 µm) wavelength gave an angular diameter of 18.7±0.5 mas, corresponding to radii above 3,000 R☉ (2.1×109 km;

Francis G. Pease (236 words) [view diff] exact match in snippet view article find links to article

to the 100-inch (2,500 mm) telescope at Mt. Wilson to measure the angular diameter of the star Betelgeuse. Their estimate of 0.047" was very close to

Virbhadra–Ellis lens equation (158 words) [view diff] exact match in snippet view article find links to article

angle of light ( α ^ ) {\displaystyle ({\hat {\alpha }})} , and the angular diameter lens-source ( D d s ) {\displaystyle \left(D_{ds}\right)} and observer-source

Puppis A (280 words) [view diff] exact match in snippet view article find links to article

in diameter and roughly 6500–7000 light-years distant. Its apparent angular diameter is about 1 degree. The light of the supernova explosion reached Earth

TX Piscium (970 words) [view diff] exact match in snippet view article find links to article

semi-regular or irregular variable which usually pulsate in an overtone. The angular diameter has been measured at around 10 mas, although this varies depending

Gliese 667 (2,345 words) [view diff] exact match in snippet view article find links to article

along the middle of the habitable zone, Gliese 667 C would have an angular diameter of 1.24 degrees—2.3 times larger than the Sun appears from the surface

Gliese 667 (2,345 words) [view diff] exact match in snippet view article find links to article

along the middle of the habitable zone, Gliese 667 C would have an angular diameter of 1.24 degrees—2.3 times larger than the Sun appears from the surface

W Orionis (486 words) [view diff] exact match in snippet view article find links to article

A long secondary period of 2,450 days has also been reported. The angular diameter of W Orionis has been measured using interferometry and a value of

HD 32453 (687 words) [view diff] exact match in snippet view article find links to article

has expanded to 10 times the latter's girth (radius detected from an angular diameter of 0.748 mas). It radiates at 50 solar luminosities from its enlarged

Delta Draconis (949 words) [view diff] exact match in snippet view article find links to article

hydrogen at its core and entered a later stage in its evolution. The angular diameter of the star is estimated as 3.37 ± 0.06 mas. At a parallax of 32.54

ESO 383-76 (1,482 words) [view diff] exact match in snippet view article find links to article

photometric catalogue by Lauberts and Valentijn in 1989 that made the first angular diameter measurements of the galaxy. This includes the D25 and D25.5 B-band

Mu Cephei (2,331 words) [view diff] exact match in snippet view article find links to article

records of the star's variability have been maintained since 1881. The angular diameter of μ Cephei has been measured interferometrically. One of the most

Astronomical seeing (3,937 words) [view diff] exact match in snippet view article find links to article

overcome seeing. The strength of seeing is often characterized by the angular diameter of the long-exposure image of a star (seeing disk) or by the Fried

R Crucis (650 words) [view diff] case mismatch in snippet view article find links to article

Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076

Moons of Pluto (3,586 words) [view diff] exact match in snippet view article find links to article

passes in front of and blocks one of Pluto's satellites. Charon has an angular diameter of 4 degrees of arc as seen from the surface of Pluto; the Sun appears

Winter solstice (2,284 words) [view diff] exact match in snippet view article find links to article

change in azimuth or elevation less than or equal to about 1/60 of the angular diameter of the Sun. Observing that it occurred within a two-day period is easier

IC 2395 (651 words) [view diff] exact match in snippet view article find links to article

same cluster is also supported by Clariá et al. who estimated its angular diameter at 19 arcminutes. IC 2395 is an open cluster of poor to moderate richness

S Orionis (550 words) [view diff] exact match in snippet view article find links to article

have been observed using VLTI and VLBA observations which measured an angular diameter varying between 7.9 and 9.7 mas. The mean period of variation has been

V538 Carinae (626 words) [view diff] exact match in snippet view article find links to article

would at least engulf the orbit of Mars. V538 Carinae has a measured angular diameter of 3.4 mas. Its distance is uncertain. At the Hipparcos distance of

History of Mars observation (7,589 words) [view diff] exact match in snippet view article find links to article

geocentric model to explain the planet's motions. Measurements of Mars' angular diameter can be found in ancient Greek and Indian texts. In the 16th century

Antares (5,247 words) [view diff] exact match in snippet view article find links to article

in 2010. The linear radius of the star can be calculated from its angular diameter and distance. However, the distance to Antares is not known with the

Canes II Group (136 words) [view diff] case mismatch in snippet view article find links to article

Name Equatorial Coordinates Declination Blue Magnitude Type Angular Diameter arc. Galaxy Diameter (Kly) Recessional Velocity Other Names NGC 4096 12 06

72 Tauri (678 words) [view diff] exact match in snippet view article find links to article

-C; Zhu, G. -L.; Fan, Q. -Y. (1987). "The measurements of stellar angular diameter by photoelectric observation of lunar occultation". Acta Astronomica

R Andromedae (972 words) [view diff] exact match in snippet view article find links to article

temperature and luminosity but is typically about 2,500 K and 6,300 L☉. The angular diameter of R Andromedae has been measured at 8.63±1.42 mas and 8.32±1.27 mas

RS Persei (983 words) [view diff] exact match in snippet view article find links to article

assumed distance, and a radius of 770±30 R☉ based on the measured angular diameter and luminosity. Even more recent measurements based on its Gaia Data

T Ceti (639 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical

Spirit (rover) (5,046 words) [view diff] exact match in snippet view article

seeing Mercury's 6.1" angular diameter. They were able to observe transits of Deimos across the Sun, but at 2' angular diameter, Deimos is about 20 times

V636 Scorpii (485 words) [view diff] case mismatch in snippet view article find links to article

Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076

UU Aurigae (930 words) [view diff] exact match in snippet view article find links to article

1971 to 1998, the periods are calculated as 439.4 and 233.1 days. The angular diameter of UU Aurigae has been measured at 12.07 ± 0.22 mas using very-long-baseline

HR 7484 (600 words) [view diff] case mismatch in snippet view article find links to article

Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions". The Astrophysical Journal. 837 (1): 19. arXiv:1611.09976

Orders of magnitude (volume) (652 words) [view diff] exact match in snippet view article

core radius r = distance times sin(1⁄2 angular diameter) = 0.2 light year. Distance = 3.3 ± 0.9 kly; angular diameter = 20 arcseconds; expands 10 milliarcseconds

TV Geminorum (940 words) [view diff] case mismatch in snippet view article find links to article

Bibcode:1971A&A....10..290S. Mondal, Soumen; Chandrasekhar, T. (2005). "Angular Diameter Measurements of Evolved Variables by Lunar Occultations at 2.2 and

NGC 2244 (519 words) [view diff] exact match in snippet view article find links to article

astronomiques de Strasbourg. Retrieved 2007-04-20. distance × sin( angular diameter / 2 ) "The Rosette Nebula In Hubble Palette". Sky & Telescope. Retrieved

AZ Cygni (1,857 words) [view diff] exact match in snippet view article find links to article

unreliable due to a very high amount of astrometric noise. Using the angular diameter and Gaia parallax derived distance in the Mid-infrared stellar Diameters

BOOMERanG experiment (584 words) [view diff] exact match in snippet view article find links to article

and others, the BOOMERanG data from 1997 and 1998 determined the angular diameter distance to the surface of last scattering with high precision. When

Lambda Boötis (738 words) [view diff] case mismatch in snippet view article find links to article

1051/0004-6361:200810623, S2CID 14972955 Ciardi; et al. (2007), "The Angular Diameter of λ Boötis", The Astrophysical Journal, 659 (2): 1623–1628, arXiv:astro-ph/0612723

CHARA array (978 words) [view diff] exact match in snippet view article find links to article

measured directly, using CHARA. This was achieved by using the observed angular diameter of the star that the planet orbited, and the already known distance

S Crucis (456 words) [view diff] case mismatch in snippet view article find links to article

Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076

Upsilon Capricorni (532 words) [view diff] exact match in snippet view article find links to article

; Evans, D. S.; Silverberg, E. C.; Wiant, J. R. (March 1973), "The angular diameter of Upsilon Capricorni and an occultation of SAO 118655.", Astronomical

Alphard (1,096 words) [view diff] exact match in snippet view article find links to article

classification of K3 and luminosity class between II and III. The angular diameter has been measured using long-baseline interferometry, yielding a value

Lambda Gruis (435 words) [view diff] exact match in snippet view article find links to article

1134/S1063773712050015, S2CID 119257644. Cruzalèbes, P.; et al. (June 2010), "Angular diameter estimation of interferometric calibrators. Example of λ Gruis, calibrator

KW Sagittarii (1,039 words) [view diff] exact match in snippet view article find links to article

000 L☉ and a radius around 1,009 ± 142 R☉ was based on the measured angular diameter and luminosity. VX Sagittarii — another red supergiant (RSG) in the

Sparrow's resolution limit (418 words) [view diff] exact match in snippet view article find links to article

stars that can still be perceived as separate by an observer. The angular diameter of the Airy disk is determined by the aperture of the instrument. Rayleigh's

List of largest galaxies (653 words) [view diff] exact match in snippet view article find links to article

provided scale "Virgo + GA + Shapley" multiplied with the values for the angular diameter of the cited estimation method. Morphology unlisted; images show an

Heliometer (652 words) [view diff] no match in snippet view article find links to article

The difference in the two micrometer readings so obtained is the (angular) diameter of the Sun. Similarly, a precise measurement of the apparent separation

Iota Aurigae (1,252 words) [view diff] exact match in snippet view article find links to article

of 4146 K and a luminosity of 4079.74 L☉. Radius calculated from an angular diameter of 7.004 mas and a distance of 200.369 parsecs. van Leeuwen, F. (November

Chi Cygni (3,823 words) [view diff] exact match in snippet view article find links to article

the angular diameter of the star. The statistical margin of error is about 20%. The distance can also be derived by comparing changes in the angular diameter

Fine guidance sensor (654 words) [view diff] exact match in snippet view article find links to article

companion, determine if certain stars really are double stars, measure the angular diameter of stars, galaxies, etc. Due to the sensitivity of the FGS they can

Eridanus Cluster (282 words) [view diff] exact match in snippet view article find links to article

barred and unbarred); Sm, SBm, Irr=Irregular; (r),(rs)=Ring Structure Angular diameter of the galaxy (arcminutes) Diameter of the galaxy (thousands of light

87 Leonis (469 words) [view diff] exact match in snippet view article find links to article

S2CID 14878976. Dunham, D. W.; Evans, D. S.; et al. (April 1974), "The angular diameter of 87 Leonis.", Astronomical Journal, 79: 483–484, Bibcode:1974AJ.

87 Leonis (469 words) [view diff] exact match in snippet view article find links to article

S2CID 14878976. Dunham, D. W.; Evans, D. S.; et al. (April 1974), "The angular diameter of 87 Leonis.", Astronomical Journal, 79: 483–484, Bibcode:1974AJ.

Kappa Pavonis (903 words) [view diff] exact match in snippet view article find links to article

radius to change by about 3 R☉ above and below the mean size. The angular diameter of the disc has been directly observed to change during the pulsations

S Normae (612 words) [view diff] case mismatch in snippet view article find links to article

Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076

R Sculptoris (663 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical

Maia (star) (1,677 words) [view diff] exact match in snippet view article

mass that is 3.8 times solar. Interferometric measurements give an angular diameter of 0.436±0.023 mas, suggesting a radius of 4.95 R☉ assuming a distance

Omicron1 Orionis (671 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER", Monthly Notices of the Royal Astronomical

Zeta Arae (732 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical

S Muscae (665 words) [view diff] case mismatch in snippet view article find links to article

Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076

S Persei (1,607 words) [view diff] exact match in snippet view article find links to article

hypergiant and has a radius over 700 times the sun's radius (R☉). Its angular diameter has been measured directly and found to be somewhat elliptical. Modelled

La Superba (1,426 words) [view diff] exact match in snippet view article find links to article

which is now accepted by the International Astronomical Union. The angular diameter of La Superba has been measured at 13.81 mas. It is expected to be

HR Carinae (1,509 words) [view diff] exact match in snippet view article find links to article

but much less bright. It is most likely a red supergiant with an angular diameter of 0.85±0.20 mas, translating to a radius about 500±150 R☉, and also

Beta Tauri (1,492 words) [view diff] exact match in snippet view article find links to article

including as a "SrCrEu star" or even an Ap star. Its limb-darkened angular diameter has been measured at 1.090±0.076 mas. At a distance of 41.1 pc, this

Gamma Hydri (535 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER", Monthly Notices of the Royal Astronomical

Lambda Aquarii (958 words) [view diff] case mismatch in snippet view article find links to article

S2CID 120313180. 10. Nather, R. Edward; et al. (June 1970). "The Angular Diameter of Lambda Aquarii". Astrophysical Journal. 160: L181. Bibcode:1970ApJ

Lacaille 9352 (1,119 words) [view diff] exact match in snippet view article find links to article

known as a red dwarf. This was the first red dwarf star to have its angular diameter measured, with the physical diameter being about 47% of the Sun's radius

Epsilon Trianguli Australis (448 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER", Monthly Notices of the Royal Astronomical

Richard Towneley (2,895 words) [view diff] exact match in snippet view article find links to article

observations of the comet of 1664, he devised his own method of computing the angular diameter of the nucleus by comparing it with the apparent diameter of a weather

Scientific information from the Mars Exploration Rover mission (4,502 words) [view diff] exact match in snippet view article find links to article

permit seeing Mercury's 6.1" angular diameter. Transits of Deimos across the Sun were seen, but at 2' angular diameter, Deimos is about 20 times larger

List of largest stars (9,642 words) [view diff] exact match in snippet view article find links to article

Epsilon Aurigae (Almaaz), VV Cephei, and V766 Centauri (HR 5171). Angular diameter measurements can be inconsistent because the boundary of the very tenuous

Psi Virginis (673 words) [view diff] exact match in snippet view article find links to article

Strasbourg, retrieved 2016-09-19. Evans, D. S.; et al. (October 1977), "Angular diameter of psi Vir (SAO 139033) and chi 1Ori (SAO 077705)", Astronomical Journal

Cosmic distance ladder (7,874 words) [view diff] exact match in snippet view article find links to article

relation (or Σ-D relation), used in elliptical galaxies, relates the angular diameter (D) of the galaxy to its velocity dispersion. It is important to describe

Gamma Reticuli (545 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER", Monthly Notices of the Royal Astronomical

Dirk Reuyl (540 words) [view diff] exact match in snippet view article find links to article

with fellow staff member Alexander N. Vyssotsky. In 1941 he measured angular diameter of Mars using photographic plates. In 1943 he claimed to have discovered

Transit of Phobos from Mars (1,945 words) [view diff] exact match in snippet view article find links to article

high latitudes (but less than 70.4°) will see a noticeably smaller angular diameter for Phobos because they are considerably farther away from it than

The Sand Reckoner (1,900 words) [view diff] exact match in snippet view article find links to article

the Sun was no more than thirty times larger than the Moon. that the angular diameter of the Sun, as seen from the Earth, was greater than 1/200 of a right

R Trianguli Australis (529 words) [view diff] case mismatch in snippet view article find links to article

Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076

List of nearest giant stars (3,607 words) [view diff] exact match in snippet view article find links to article

Calculated using an angular diameter of 5.25 mas. Calculated using an angular diameter of 3.99 mas. Calculated using an angular diameter of 3.72 mas. Calculated

Sigma Librae (1,118 words) [view diff] exact match in snippet view article find links to article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical

Spica (2,512 words) [view diff] exact match in snippet view article find links to article

the pair and to directly measure the orbital characteristics and the angular diameter of the primary, which was found to be (0.90 ± 0.04) × 10−3 arcseconds

Mu Geminorum (1,251 words) [view diff] case mismatch in snippet view article find links to article

S2CID 121883397. Mondal, Soumen; Chandrasekhar, T. (August 2005), "Angular Diameter Measurements of Evolved Variables by Lunar Occultations at 2.2 and

IC 443 (1,334 words) [view diff] exact match in snippet view article find links to article

surrounding molecular clouds. IC 443 is an extended source, having an angular diameter of 50 arcmin (by comparison, the full moon is 30 arcmin across). At

SN 1572 (2,224 words) [view diff] exact match in snippet view article find links to article

Tycho's SNR has a roughly spherical morphology and spreads over an angular diameter of about 8 arcminutes. Its physical size corresponds to radius of the

Gliese 667 Cc (1,489 words) [view diff] exact match in snippet view article find links to article

edge of the habitable zone. From its surface, the star would have an angular diameter of 1.24 degrees and would appear to be 2.3 times the visual diameter

Virgo Cluster (2,094 words) [view diff] exact match in snippet view article find links to article

SBa,SBb,SBc,SBd=Barred spiral, Sm,SBm,Irr=Irregular. Column 6: The angular diameter of the galaxy (arcminutes). Column 7: The diameter of the galaxy (thousands

James Bradley (1,645 words) [view diff] exact match in snippet view article find links to article

1757. He was survived by one daughter. In 1722 Bradley measured the angular diameter of Venus with a large aerial telescope with an objective focal length

S Sagittae (837 words) [view diff] case mismatch in snippet view article find links to article

Moskalik, P.; Gorynya, N. A. (2005). "Mean Angular Diameters and Angular Diameter Amplitudes of Bright Cepheids". Acta Astronomica. 55: 247. arXiv:astro-ph/0507076

Age of the universe (3,946 words) [view diff] exact match in snippet view article find links to article

on 23 February 2008. Retrieved 23 February 2008. Hu, W. "Animation: Angular diameter distance scaling with curvature and lambda". University of Chicago

TRAPPIST-1e (2,713 words) [view diff] exact match in snippet view article find links to article

Sun due to the low luminosity of its star. The star would cover an angular diameter of about 2.17 degrees from the surface of the planet, and so would

Sakurai's Object (2,371 words) [view diff] exact match in snippet view article find links to article

had increased to around 11–15. By investigating the measured fluxes, angular diameter, and mass of the nebula, a distance of 5.5 kpc and luminosity of 38 L☉

Eta Telescopii (1,221 words) [view diff] exact match in snippet view article find links to article

It has a mass estimated to be 48 times the mass of Jupiter. From angular diameter and distance Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia

Eta Telescopii (1,221 words) [view diff] exact match in snippet view article find links to article

It has a mass estimated to be 48 times the mass of Jupiter. From angular diameter and distance Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia

On Sizes and Distances (Hipparchus) (3,021 words) [view diff] exact match in snippet view article

the Moon measured its own circle close to 650 times, and that the angular diameter of Earth's shadow is 2.5 times that of the Moon. Pappus tells us that

Sunyaev–Zeldovich effect (2,204 words) [view diff] exact match in snippet view article find links to article

X-ray data can also be used to determine the Hubble constant using the angular diameter distance of the cluster. These thermal distortions can also be measured

Ara (constellation) (3,223 words) [view diff] exact match in snippet view article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical

Conjunction (astronomy) (3,560 words) [view diff] exact match in snippet view article

1953, BC, Mercury, Venus, Mars and Saturn formed a group with an angular diameter of 26.45 arc minutes. Jupiter was on the same day only a few degrees

Zeta Geminorum (2,165 words) [view diff] exact match in snippet view article find links to article

1051/0004-6361/200811464, S2CID 18283579 Kervella, P.; et al. (March 2001), "The angular diameter and distance of the Cepheid ? Geminorum", Astronomy and Astrophysics

(31345) 1998 PG (1,013 words) [view diff] exact match in snippet view article

4 kilometers. From the surface of 1998 PG, the moon would have an angular diameter of about 16.3°. For comparison, the Sun appears to be 0.5° from Earth

Mensa (constellation) (4,058 words) [view diff] case mismatch in snippet view article

Based on Eclipsing Binary Stars: Toward Precision Better than 1% in Angular Diameter Predictions". The Astrophysical Journal. 837 (1): 19. arXiv:1611.09976

Eclipse cycle (9,659 words) [view diff] exact match in snippet view article find links to article

misses Earth's shadow. Also, at most solar eclipses, the apparent angular diameter of the Moon is insufficient to fully occlude the solar disc, unless

HR 5171 (3,358 words) [view diff] exact match in snippet view article find links to article

possible S Doradus variable, as well as an eclipsing variable. The angular diameter of HR 5171A has been published three times using measurements from

Transit of Mercury (3,501 words) [view diff] exact match in snippet view article find links to article

May 8 (descending node) and November 10 (ascending node), with the angular diameter of Mercury being about 12″ for May transits, and 10″ for November transits

VV Cephei (2,430 words) [view diff] exact match in snippet view article find links to article

as being of a portion of the disc rather than the star itself. The angular diameter of VV Cephei A can be estimated using photometric methods and has been

Arcturus (5,300 words) [view diff] exact match in snippet view article find links to article

Bibcode:1998Obs...118..299G. Quirrenbach, A.; et al. (August 1996), "Angular diameter and limb darkening of Arcturus.", Astronomy and Astrophysics, 312:

Length contraction (4,435 words) [view diff] exact match in snippet view article find links to article

Victor Weisskopf in a Physics Today article. For instance, for a small angular diameter, a moving sphere remains circular and is rotated. This kind of visual

Orders of magnitude (length) (16,312 words) [view diff] exact match in snippet view article

217P. radius = distance times sin(angular diameter/2) = 0.2 light-year. Distance = 3.3 ± 0.9 kly; angular diameter = 20 arcseconds (Reed et al. 1999)

RW Cephei (3,330 words) [view diff] exact match in snippet view article find links to article

Images obtained using the SURFING algorithm result in a limb-darkened angular diameter of 2.45 mas, corresponding to a linear radius of 900–1,760 R☉ depending

Altair (2,770 words) [view diff] exact match in snippet view article find links to article

may be due to convection cells forming at the cooler equator. The angular diameter of Altair was measured interferometrically by R. Hanbury Brown and

Hollow Moon (3,199 words) [view diff] exact match in snippet view article find links to article

with such a satellite: Saturn's moon Prometheus has roughly the same angular diameter as the Sun when viewed from Saturn. Some scholars have claimed that

Sirius (10,052 words) [view diff] exact match in snippet view article find links to article

been measured by an astronomical interferometer, giving an estimated angular diameter of 5.936±0.016 mas. The projected rotational velocity is a relatively

Barnard's Star (5,066 words) [view diff] exact match in snippet view article find links to article

amount to a quarter of a degree in a human lifetime, roughly half the angular diameter of the full Moon. The radial velocity of Barnard's Star is −110 km/s

Dark Energy Survey (5,471 words) [view diff] exact match in snippet view article find links to article

correlations and spherical harmonics to constrain the ratio of comoving angular diameter distance D m ( Z e f f = 0.835 ) / r d = 18.92 ± 0.51 {\displaystyle

Orders of magnitude (power) (2,636 words) [view diff] exact match in snippet view article

"Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER". Monthly Notices of the Royal Astronomical

Atmosphere of Uranus (6,130 words) [view diff] exact match in snippet view article find links to article

frustration. Uranus is a relatively faint object, and its visible angular diameter is smaller than 5″. The first spectra of Uranus were observed through

Solar eclipse of July 16, 2186 (1,007 words) [view diff] exact match in snippet view article find links to article

its angular diameter nearly as small as possible). This occurs around July 6th. The Moon being almost exactly at perigee (making its angular diameter as

Lunar theory (6,838 words) [view diff] exact match in snippet view article find links to article

factor of about 2, which is clearly not seen in reality. (The apparent angular diameter of the Moon does vary monthly, but only over a much narrower range

Total internal reflection (13,482 words) [view diff] exact match in snippet view article find links to article

is compressed into a conical field known as Snell's window, whose angular diameter is twice the critical angle (cf. Fig. 6). The field of view above

List of instrument-resolved minor planets (2,526 words) [view diff] exact match in snippet view article find links to article

2012-02-25, retrieved 2011-07-29 Worden, S. P.; et al. (January 1979), "Angular diameter of the asteroids Vesta and Pallas determined from speckle observations"