HD 61831
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h 39m 27.33834s |
| Declination | −38° 18′ 28.8786″ |
| Apparent magnitude (V) | 4.84 |
| Characteristics | |
| Spectral type | B2.5V |
| U−B color index | −0.66 |
| B−V color index | −0.19 |
| Astrometry | |
| Radial velocity (Rv) | +26.40 km/s |
| Proper motion (μ) | RA: −21.11 mas/yr Dec.: +15.81 mas/yr |
| Parallax (π) | 5.87±0.16 mas |
| Distance | 560 ± 20 ly (170 ± 5 pc) |
| Absolute magnitude (MV) | −1.51 |
| Details | |
| Mass | 6.5 M☉ |
| Luminosity | 1,300 L☉ |
| Temperature | 16,849 K |
| Metallicity [Fe/H] | 0.00 dex |
| Rotational velocity (v sin i) | 138 km/s |
| Other designations | |
| d1 Puppis, CD−38°3531, GC 10311, GSC 07644-02700, HIP 37297, HR 2961, HD 61831, SAO 198253 | |
| Database references | |
| SIMBAD | data |
HD 61831 (d1 Puppis) is a class B2.5V (blue dwarf) star in the constellation Puppis. Its apparent magnitude is 4.84 and it is approximately 556 light years away based on parallax.