171 G. Puppis (171 Pup) is a triple[8] star system in the constellationofPuppis – the stern of Argo Navis – of apparent magnitude +5.38. Lacking a Bayer designation, it is instead known by its Gould designation. Based upon parallax measurements, the system is 49.6 light years away from the Solar System.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Puppis |
| Right ascension | 07h45m 35.02168s[1] |
| Declination | –34° 10′ 20.5143″[1] |
| Apparent magnitude (V) | 5.38[2] |
| Characteristics | |
| Spectral type | F9 V[3] |
| U−B color index | −0.085[2] |
| B−V color index | +0.56[2] |
| Astrometry | |
| Radial velocity (Rv) | +102.6[4] km/s |
| Proper motion (μ) | RA: +10.32[1] mas/yr Dec.: −124.46[1] mas/yr |
| Parallax (π) | 65.75 ± 0.51 mas[1] |
| Distance | 49.6 ± 0.4 ly (15.2 ± 0.1 pc) |
| Absolute magnitude (MV) | +4.57[5] |
| Details | |
| 171 Pup A | |
| Mass | 0.81[6] M☉ |
| Surface gravity (log g) | 4.24[6] cgs |
| Temperature | 5,852[6] K |
| Metallicity [Fe/H] | −0.81[6] dex |
| Rotational velocity (v sin i) | 4.4[5] km/s |
| Other designations | |
CD−33°4113, GJ 288, HD 63077, HIP 37853, HR 3018, SAO 198404[7] | |
| Database references | |
| SIMBAD | AB |
| A | |
| B | |
| ARICNS | A |
| B | |
The inner pair form a spectroscopic binary with an orbital period of around 10 years. In 2011, they had an angular separationof309.8±1.6 mas along a position angle of 72.1°.[9] There is a common proper motion companion, Van Biesbroeck 3 or WD 0743–340, at an angular separation of 869.65″ along a position angle of 2.81° from the inner pair. This is a white dwarf star with a classification of DC11.0 and a temperature of 4,600 K, making it one of the coolest white dwarfs known.[10]