HD 63922
Binary star system in the constellation Puppis
From Wikipedia, the free encyclopedia
HD 63922 is a class B0III[3] (blue giant) star in the constellation Puppis. Its apparent magnitude is 4.11[2] and it is approximately 1600 light years away based on parallax.[1]
 | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 49m 14.29536s[1] |
| Declination | −46° 22′ 23.5422″[1] |
| Apparent magnitude (V) | 4.11[2] |
| Characteristics | |
| Spectral type | B0III[3] |
| U−B color index | −1.01[2] |
| B−V color index | −0.18[2] |
| Astrometry | |
| Radial velocity (Rv) | +24.00[4] km/s |
| Proper motion (μ) | RA: −4.37[1] mas/yr Dec.: +8.66[1] mas/yr |
| Parallax (π) | 1.98±0.28 mas[1] |
| Distance | approx. 1,600 ly (approx. 510 pc) |
| Absolute magnitude (MV) | −4.37[5] |
| Details | |
| Mass | 19.3[6] M☉ |
| Radius | 10.3[7] R☉ |
| Luminosity | 63,096[8] L☉ |
| Surface gravity (log g) | 3.95[9] cgs |
| Temperature | 31,200[9] K |
| Metallicity [Fe/H] | +0.16[5] dex |
| Rotational velocity (v sin i) | 40[8] km/s |
| Age | 8.0[6] Myr |
| Other designations | |
| P Puppis, CD−46°3458, CCDM J07493-4622A, GC 10576, GSC 08134-03515, HIP 38164, HR 3055, HD 63922, SAO 219035, WDS J07492-4622Aa,Ab | |
| Database references | |
| SIMBAD | data |
It is a multiple star; the primary has one close companion, Ab, at 0.3" separation and magnitude 7.19, and a more distant one, B, at 59.1" and 8.79 magnitude.[10]
A loose agglomerate of stars around P Puppis was identified in 2008 as a young open cluster. Ten member stars were identified, including P Puppis itself and the naked-eye stars QS Puppis and HD 63578.[11] The cluster is part of the Vela OB2 association and at least 32 members have since been identified. It is thought that the cluster is only about 10 million years old.[12]