Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Puppis |
Right ascension | 07h 45m 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 | |
Database references | |
SIMBAD | AB |
A | |
B | |
ARICNS | A |
B |
171 G. Puppis (171 Pup) is a triple [8] star system in the constellation of Puppis – 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.
The inner pair form a spectroscopic binary with an orbital period of around 10 years. In 2011, they had an angular separation of 309.8±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]
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Puppis |
Right ascension | 07h 45m 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 | |
Database references | |
SIMBAD | AB |
A | |
B | |
ARICNS | A |
B |
171 G. Puppis (171 Pup) is a triple [8] star system in the constellation of Puppis – 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.
The inner pair form a spectroscopic binary with an orbital period of around 10 years. In 2011, they had an angular separation of 309.8±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]