Kappa Phoenicis
Star in the constellation Phoenix
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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]
 | |
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| 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] |
| Distance | 77.7 ± 0.3 ly (23.81 ± 0.09 pc) |
| Absolute magnitude (MV) | 2.05[3] |
| Details | |
| Mass | 1.74[5] M☉ |
| Radius | 2.03+0.10 −0.19[6] R☉ |
| Luminosity | 10.7±0.1[6] L☉ |
| Surface gravity (log g) | 4.30[5] cgs |
| Temperature | 7,320+369 −176[6] K |
| Metallicity [Fe/H] | -0.04[3] dex |
| Rotational velocity (v sin i) | 245.0[7] km/s |
| Age | 348[5] Myr |
| Other designations | |
| κ Phe, CD−44°101, GC 516, GJ 20, HD 2262, HIP 2072, HR 100, SAO 215092[8] | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
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]