Alpha Phoenicis

"Ankaa" redirects here. For the album, see Ankaa (album). Not to be confused with Ancha, a star in Aquarius.
Alpha Phoenicis
Location of α Phoenicis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Phoenix
Right ascension 00h 26m 17.06309s[1]
Declination −42° 18′ 21.7712″[1]
Apparent magnitude (V) 2.377[2]
Characteristics
Spectral type K0.5 IIIb[3]
U−B color index +0.903[2]
B−V color index +1.092[2]
Astrometry
Radial velocity (Rv)+74.6[4] km/s
Proper motion (μ) RA: +176.268[1] mas/yr
Dec.: −398.872[1] mas/yr
Parallax (π)39.9183 ± 0.7283 mas[1]
Distance82 ± 1 ly
(25.1 ± 0.5 pc)
Absolute magnitude (MV)0.52[5]
Orbit[6]
Period (P)3848.8 days
Semi-major axis (a)103.5 m
Eccentricity (e)0.34
Inclination (i)128.0±5.4°
Longitude of the node (Ω)242.8±3.9°
Periastron epoch (T)2416201.8 HJD
Argument of periastron (ω)
(primary)		19.8°
Details
Mass2.79±0.14[7] M☉
Radius14.7[8] R☉
Luminosity83[9] L☉
Surface gravity (log g)2.53[3] cgs
Temperature4,700[10] K
Metallicity [Fe/H]−0.73[3] dex
Rotational velocity (v sin i)1.0[11] km/s
Other designations
Ankaa, Nair al Zaurak, Cymbae, Lucida Cymbae, CD−42°116, FK5 12, GCTP 71.00, HIP 2081, HR 99, HD 2261, LTT 231, SAO 215093.[12]
Database references
SIMBADdata

Alpha Phoenicis (α Phoenicis, abbreviated Alpha Phe or α Phe), formally named Ankaa /ˈæŋkə/,[13] with the same pronunciation) is the brightest star in the constellation of Phoenix.

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