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Alpha Phoenicis
Observation data
Epoch J2000      Equinox J2000
Constellation Phoenix
Right ascension 00h 66m 17.05s [1]
Declination –42° 18′ 21.6″ [1]
Apparent magnitude (V) 2.40
Characteristics
Spectral type K0 III
U-B color index 0.88
B-V color index 1.08
Variable type ?
Astrometry
Radial velocity (Rv) +75.2 km/s
Proper motion (μ) RA: 233.05 ± 0.65 [1] mas/yr
Dec.: -356.30 ± 0.74 [1] mas/yr
Parallax (π) 38.50 ± 0.73[1] mas
Distance 85 ± 2 ly
(26 ± 0.5 pc)
Absolute magnitude (MV) 0.52
Details
Mass 2.5 M
Radius 11.1 R
Luminosity 62 L
Temperature 4,850 K
Metallicity ?
Rotation ?
Age ? years
Other designations
Ankaa, Nair al Zaurak, Cymbae, Lucida Cymbae, HR 99, CD -42°116, HD 2261, LTT 231, GCTP 71.00, SAO 215093, FK5 12, HIP 2081.

Alpha Phoenicis (α Phe / α Phoenicis) is the brightest star in the constellation Phoenix. It has the traditional name Ankaa, from the Arabic العنقاء al-‘anqā’ "the phoenix". Medieval Arab astronomers formed the constellation of the dhow (small boat) where Phoenix is, so another popular name for the star is Nair al-Zaurak from النائر الزورق an-na’ir az-zawraq "the bright (star) of the skiff". The Latin translation is Cymbae, from lūcida cumbæ. It is a yellow star of spectral type K0, double, of magnitudine 2.4. It is overhung in splendor from the neighbors Achernar (α Eridani)) and Fomalhaut (α Piscis Australis). It's approx. 85 light years from us.[1] Ankaa is similar to many of the visible stars of the night sky, being an orange giant of relatively average stellar size. It is currently thought to be in the midst of a short but stable helium burning phase of its stellar evolution, although it likely won't be long in astronomical terms before it sheds its outer layers in a planetary nebula and ends its life quietly as a white dwarf. It is known that Ankaa has a small stellar companion, but currently little to nothing is known about the companion.

References

  1. ^ a b c d e f van Leeuwen, F. (2007). "HIP 2081". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=2076. Retrieved 2009-12-13.  
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