3 Puppis
3 Puppis | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 43m 48.46872s [1] |
| Declination | −28° 57′ 17.3720″ [1] |
| Apparent magnitude (V) | 3.93[1] |
| Characteristics | |
| Spectral type | A3Iab [1] |
| Apparent magnitude (U) | 4.06 |
| Apparent magnitude (B) | 4.09 |
| Apparent magnitude (J) | 3.550 ± 0.308 |
| Apparent magnitude (H) | 3.156 ± 0.224 |
| Apparent magnitude (K) | 2.463 ± 0.292 |
| B−V color index | 0.16 |
| Astrometry | |
| Radial velocity (Rv) | 25.4±0.9 km/s |
| Proper motion (μ) | RA: -5.09±0.11 mas/yr Dec.: 3.90±0.15 mas/yr |
| Parallax (π) | 0.59 ± 0.17 mas |
| Distance | 2280±490[2] ly (700±150[2] pc) |
| Absolute magnitude (MV) | -5.3[2] |
| Details | |
| Mass | 8-15[2] M☉ |
| Radius | 55±10[2] R☉ |
| Luminosity | ? L☉ |
| Surface gravity (log g) | 2.0[2] cgs |
| Temperature | 8,500[2] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
3 Puppis (3 Pup) is a binary star system[3] in the constellation Puppis. Its apparent magnitude is 3.93. It is a white supergiant with a spectral class of A3Iab. It is surrounded by a cloud of circumstellar dust, which is unusual for an A-type star, suggesting that it may actually be a low-mass star transitioning from an asymptotic giant branch phase to a planetary nebula.[3]
References
- ↑ 1.0 1.1 1.2 1.3 SIMBAD, l Puppis (accessed 24 January 2013)
- ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Rovero, Adrián C.; Ringuelet, Adela E. (21 July 1993). "3 Puppis - A peculiar object with infrared excess". Monthly Notices of the Royal Astronomical Society 266: 204–205. doi:10.1093/mnras/266.1.203. Retrieved 26 Jan 2013.
- ↑ 3.0 3.1 Plets, H.; Waelkens, C.; Trams, N. R. (1995). "The peculiar binary supergiant 3 Puppis". Astronomy and Astrophysics, v.293. The Smithsonian/NASA Astrophysics Data System. pp. 363–370. Retrieved 26 Jan 2013.
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