Kappa Phoenicis

Kappa Phoenicis
Location of κ Phoenicis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Phoenix
Right ascension 00h 26m 12.20183s[1]
Declination −43° 40′ 47.3929″[1]
Apparent magnitude (V) 3.94[2]
Characteristics
Spectral type A5IVn[3]
U−B color index +0.11[2]
B−V color index +0.17[2]
Astrometry
Radial velocity (Rv)+11.30[4] km/s
Proper motion (μ) RA: +106.20[1] mas/yr
Dec.: +32.15[1] mas/yr
Parallax (π)42.00 ± 0.15 mas[1]
Distance77.7 ± 0.3 ly
(23.81 ± 0.09 pc)
Absolute magnitude (MV)2.05[3]
Details
Mass1.74[5] M☉
Radius2.03+0.10
−0.19[6] R☉
Luminosity10.7±0.1[6] L☉
Surface gravity (log g)4.30[5] cgs
Temperature7,320+369
−176[6] K
Metallicity [Fe/H]-0.04[3] dex
Rotational velocity (v sin i)245.0[7] km/s
Age348[5] Myr
Other designations
κ Phe, CD−44°101, GC 516, GJ 20, HD 2262, HIP 2072, HR 100, SAO 215092[8]
Database references
SIMBADdata
ARICNSdata

κ Phoenicis, Latinized as Kappa Phoenicis, is a single[9] star in the southern constellation of Phoenix. It is visible to the naked eye as a white-hued point of light with an apparent visual magnitude of 3.94.[2] The distance to this star is approximately 77.7 light years based on parallax,[1] and it is drifting further away with a radial velocity of +11 km/s.[4] It is a member of the Castor Moving Group of co-moving stars.[10]

This object has a stellar classification of A5IVn,[3] which matches the spectrum of an A-type subgiant star with "nebulous" lines due to rapid rotation. It is 348[5] million years old and is spinning with a projected rotational velocity of 245 km/s.[7] The star has 1.7[5] times the mass of the Sun and 2.0[6] times the Sun's radius. It is radiating 10.7[6] times the luminosity of the Sun from its photosphere at an effective temperature of 7,320 K.[6] The star displays an infrared excess that matches the signature of a debris disk orbiting 9 AU from the host star with a temperature of 170 K.[11]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Ducati2002 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference XHIP was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Evans1967 was invoked but never defined (see the help page).
  5. ^ a b c d e Cite error: The named reference David2015 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Glebocki2005 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Vereshchagin2015 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Cotten2016 was invoked but never defined (see the help page).