22 Aurigae

22 Aurigae
Observation data
Epoch J2000      Equinox J2000
Constellation Auriga
Right ascension 05h 23m 22.87264s[1]
Declination +28° 56′ 12.3397″[1]
Apparent magnitude (V) 6.45[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type B9 Vs[4]
B−V color index −0.040±0.008[2]
Astrometry
Radial velocity (Rv)+9.6±2.7[2] km/s
Proper motion (μ) RA: +16.123[1] mas/yr
Dec.: −32.096[1] mas/yr
Parallax (π)6.0711 ± 0.0689 mas[1]
Distance537 ± 6 ly
(165 ± 2 pc)
Absolute magnitude (MV)0.41[2]
Details
Mass2.85±0.08[3] M☉
Radius3.1[5] R☉
Luminosity89.7+15.5
−10.1[3] L☉
Temperature10,764+140
−49[3] K
Rotational velocity (v sin i)66[3] km/s
Other designations
22 Aur, BD+28°788, HD 35076, HIP 25192, HR 1768, SAO 77139[6]
Database references
SIMBADdata

22 Aurigae is a star located 537 light years away from the Sun in the northern constellation Auriga. It is just bright enough to be barely visible to the naked eye under good viewing conditions, appearing as a blue-white hued star with an apparent visual magnitude of 6.45.[2] At the distance of this object, the brightness is diminished by an extinction of 0.57 due to interstellar dust.[7] The star is moving further from the Earth with a heliocentric radial velocity of +10 km/s,[2] and it is a member of the Taurion OB association, located between Orion and Taurus.[8]

This object is a B-type main-sequence star with a stellar classification of B9 Vs.[4] The 's' notation indicates the spectrum appears "sharp"-lined, due to its relatively moderate projected rotational velocity of 66 km/s.[3] It has 2.9[3] times the mass of the Sun and about 3.1[5] times the Sun's radius. The star is radiating 90[3] times the luminosity of the Sun from its photosphere at an effective temperature of 10,764 K.[3]

  1. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d e f g h i Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Cowley1969 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference PasinettiFracassini2001 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Buoy2015 was invoked but never defined (see the help page).