Gamma Corvi

Gamma Corvi
Location of γ Crv (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Corvus
Right ascension 12h 15m 48.37081s[1]
Declination –17° 32′ 30.9496″[1]
Apparent magnitude (V) 2.585[2]
Characteristics
Spectral type B8 III[3]
U−B color index –0.344[2]
B−V color index –0.111[2]
Astrometry
Radial velocity (Rv)-4.2[4] km/s
Proper motion (μ) RA: –158.61[1] mas/yr
Dec.: +21.86[1] mas/yr
Parallax (π)21.23 ± 0.20 mas[1]
Distance154 ± 1 ly
(47.1 ± 0.4 pc)
Absolute magnitude (MV)−0.79[5]
Details
γ Crv A
Mass4.2+0.4
−0.3[6] M☉
Radius4.086[7] R☉
Luminosity301±5[7] L☉
Surface gravity (log g)3.5[8] cgs
Temperature12,000[8] K
Rotation5.938[7] days
Rotational velocity (v sin i)35[7] km/s
Age160+40
−30[6] Myr
γ Crv B
Mass0.8[9] M☉
Other designations
4 Corvi, BD–16 3424, FK5 457, HD 106625, HIP 59803, HR 4662, SAO 157176.[10]
Database references
SIMBADdata

Gamma Corvi (γ Corvi, abbreviated Gamma Crv, γ Crv) is a binary star and the brightest star in the southern constellation of Corvus, having an apparent visual magnitude of 2.59.[11] The system's two components are designated Gamma Corvi A (officially named Gienah /ˈdʒiːnə/, traditionally the name of the system)[12][13] and Gamma Corvi B, whose magnitude is 9.7 and which is 1.1 arcseconds away from Gamma Corvi A.[14] The distance to this system has been measured directly using the parallax technique, yielding an estimated 154 light-years (47 parsecs) from the Sun.[1]

  1. ^ a b c d e f Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference csaao8 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference apj736_2_89 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference TESS was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference aaa320_580 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference aj133_2_545 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Kaler, James B. (Jim) (2004), "Gienah Corvi", Stars, University of Illinois, retrieved 18 March 2015
  12. ^ Kunitzsch, Paul; Smart, Tim (2006). A Dictionary of Modern star Names: A Short Guide to 254 Star Names and Their Derivations (2nd rev. ed.). Cambridge, Massachusetts: Sky Pub. ISBN 978-1-931559-44-7.
  13. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.
  14. ^ "WDS 12158-1733 RBR 5 (Gienah)". www.stelledoppie.it. Retrieved 2024-02-01.