171 G. Puppis

171 G. Puppis
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]
Distance49.6 ± 0.4 ly
(15.2 ± 0.1 pc)
Absolute magnitude (MV)+4.57[5]
Details
171 Pup A
Mass0.81[6] M☉
Surface gravity (log g)4.24[6] cgs
Temperature5,852[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
SIMBADAB
A
B
ARICNSA
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]

  1. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference MERMILLIOD was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference aj132_1_161 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference rgcrv was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference vonEiff2012 was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Bensby 2014 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference tokovinin2012b was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference tokovinin2012a was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference holberg2013 was invoked but never defined (see the help page).