V Puppis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 58m 14.43920s |
| Declination | −49° 14′ 41.6803″ |
| Apparent magnitude (V) | 4.41 (5.10 + 5.59) |
| Characteristics | |
| Spectral type | B1Vp + B3IV: |
| U−B color index | −0.96 |
| B−V color index | −0.17 |
| Variable type | β Lyr |
| Astrometry | |
| Radial velocity (Rv) | +19.40 km/s |
| Proper motion (μ) | RA: -5.34 mas/yr Dec.: +7.12 mas/yr |
| Parallax (π) | 3.40±0.29 mas |
| Distance | 960 ± 80 ly (290 ± 30 pc) |
| Absolute magnitude (MV) | −3.56 |
| Orbit | |
| Primary | V Pup Aa |
| Companion | V Pup Ab |
| Period (P) | 1.4544859 d |
| Semi-major axis (a) | 14.96±0.2 R☉ |
| Details | |
| V Pup Aa | |
| Mass | 14.0 M☉ |
| Radius | 5.48 R☉ |
| Luminosity | 12,600 L☉ |
| Temperature | 26,000 K |
| Rotational velocity (v sin i) | 275.0 km/s |
| V Pup Ab | |
| Mass | 7.3 M☉ |
| Radius | 4.59 R☉ |
| Luminosity | 6,500 L☉ |
| Temperature | 24,000 K |
| Age | 5 Myr |
| Other designations | |
| CD-48°3349, CCDM J07582-4915A, GC 10802, GSC 08143-03239, HIP 38957, HR 3129, HD 65818, SAO 219226, WDS J07582-4915A | |
| Database references | |
| SIMBAD | data |
V Puppis (V Pup) is a star system in the constellation Puppis. Its apparent magnitude is 4.41. There is a binary star system at the center with a B1 dwarf orbiting a B3 subgiant star. They have an orbital period of 1.45 days and a distance of only 15 solar radii apart. However, the system moves back and forth, indicating that there is a massive object orbiting them with a period around 5.47 years. Based on the mass of the object, its lack of a visible spectrum, and circumstellar matter in the system with many heavy elements (as would be produced by a past supernova in the system), it is probably a black hole. However, a follow-up study could not confirm this object, but found signs that there may be a third object which is fainter than the other components.
In addition to the main system, more distant components have been reported: B, at magnitude 11.5 and separation 6.2", C, at magnitude 13.2 and separation 18.9", D, at magnitude 9.88 and separation 39", and E, at magnitude 13 and separation from D of 10.4".