Gamma Gruis

"Aldhanab" redirects here. Not to be confused with Deneb.
Gamma Gruis
Location of γ Gruis (circled) near the center
Observation data
Epoch J2000      Equinox J2000
Constellation Grus
Right ascension 21h 53m 55.72620s[1]
Declination –37° 21′ 53.4790″[1]
Apparent magnitude (V) 3.003[2]
Characteristics
Spectral type B8 III[3] or B8IV-Vs[4]
U−B color index –0.307[2]
B−V color index –0.121[2]
Astrometry
Radial velocity (Rv)–2.1[5] km/s
Proper motion (μ) RA: +98.07[1] mas/yr
Dec.: –13.22[1] mas/yr
Parallax (π)15.45 ± 0.67 mas[1]
Distance211 ± 9 ly
(65 ± 3 pc)
Absolute magnitude (MV)−1.05[6]
Details
Mass3.06[7] M☉
Radius4.5[8] R☉
Luminosity373[6] L☉
Surface gravity (log g)3.79[7] cgs
Temperature12,520[9] K
Rotation4.987[10] d
Rotational velocity (v sin i)57[11] km/s
Age75[7] Myr
Other designations
γ Gru, Gamma Gru, CD−37° 9119, FK5 822, GC 30640, HD 207971, HIP 108085, HR 8353, SAO 213374[12]
Database references
SIMBADdata

Gamma Gruis or γ Gruis, formally named Aldhanab (/ˈældənæb/),[13] is a star in the southern constellation of Grus (it once belonged to the Ptolemaic constellation Piscis Austrinus). With an apparent visual magnitude of 3.0,[2] it is the third-brightest star in Grus. Based upon parallax measurements, this star is located at a distance of roughly 211 light-years (65 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 d Cite error: The named reference sps1966 was invoked but never defined (see the help page).
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  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference David2015 was invoked but never defined (see the help page).
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  11. ^ Cite error: The named reference aaa393_3_897 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ "Naming Stars". IAU.org. Retrieved 16 December 2017.