HD 222095
From Wikipedia, the free encyclopedia
  | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 23h 37m 50.99418s[1] |
| Declination | −45° 29′ 32.4672″[1] |
| Apparent magnitude (V) | 4.74[2] |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | A1/2V[3] |
| U−B color index | +0.09[2] |
| B−V color index | +0.08[2] |
| Astrometry | |
| Radial velocity (Rv) | +3.40[4] km/s |
| Proper motion (μ) | RA: +70.71[1] mas/yr Dec.: −12.66[1] mas/yr |
| Parallax (π) | 16.29±0.22 mas[1] |
| Distance | 200 ± 3 ly (61.4 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.80[5] |
| Details | |
| Mass | 2.55[6] M☉ |
| Radius | 2.2[7] R☉ |
| Luminosity | 41.42[5] L☉ |
| Surface gravity (log g) | 3.92[6] cgs |
| Temperature | 9,230[6] K |
| Metallicity [Fe/H] | −0.01[8] dex |
| Rotational velocity (v sin i) | 141[6] km/s |
| Age | 482[6] Myr |
| Other designations | |
| CD−46°14720, FK5 889, GC 32836, HD 222095, HIP 116602, HR 8959, SAO 231707[9] | |
| Database references | |
| SIMBAD | data |
HD 222095 is a single[10] star in the southern constellation of Phoenix, near the western constellation border with Grus. It has a white hue and is visible to the naked eye with an apparent visual magnitude of 4.74.[2] The star is located at a distance of is approximately 200 light years based on parallax,[1] and it is drifting further away with a radial velocity of +3.4 km/s.[4]
This object is an A-type main-sequence star with a stellar classification of A1/2V.[3] It has a high rate of spin with a projected rotational velocity of 141[6] to 165 km/s, giving it an equatorial bulge that is 6% larger than the polar radius.[11] The star is 482 million years old with 2.55[6] times the mass of the Sun and around 2.2[7] times the Sun's radius. It is radiating 41[5] times the luminosity of the Sun from its photosphere at an effective temperature of 9,230 K.[6] The chemical abundance of the star's outer atmosphere is similar to that in the Sun.[8]
