RS Puppis
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 08h 13m 04.21571s |
| Declination | −34° 34′ 42.6964″ |
| Apparent magnitude (V) | 6.5-7.6 |
| Characteristics | |
| Spectral type | G2Ib (F9 - G7) |
| U−B color index | 1.2 |
| B−V color index | 1.5 |
| Variable type | δ Cep |
| Astrometry | |
| Radial velocity (Rv) | 24.60 km/s |
| Proper motion (μ) | RA: −3.518 mas/yr Dec.: +3.126 mas/yr |
| Parallax (π) | 0.5693±0.0172 mas |
| Distance | 5,700 ± 200 ly (1,760 ± 50 pc) |
| Absolute magnitude (MV) | −5.70 |
| Details | |
| Mass | 9.2 M☉ |
| Radius | 191 (164 - 208) R☉ |
| Luminosity | 21,700 (14,200 - 29,500) L☉ |
| Temperature | 5,060 (4,640 - 5,850) K |
| Metallicity [Fe/H] | 0.17 dex |
| Age | 28 Myr |
| Other designations | |
| HD 68860, HIP 40233, SAO 198944, CD−34°4488 | |
| Database references | |
| SIMBAD | data |
RS Puppis (or RS Pup) is a Cepheid variable star around 6,000 ly away in the constellation of Puppis. It is one of the biggest and brightest known Cepheids in the Milky Way galaxy and has one of the longest periods for this class of star at 41.5 days.