171 G. Puppis

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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]
Spectral type F9 V[3]
U−B color index −0.085[2]
B−V color index +0.56[2]
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[1] mas
Distance49.6 ± 0.4 ly
(15.2 ± 0.1 pc)
Absolute magnitude (MV)+4.57[5]
171 Puppis 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[7] km/s
Other designations
CD−33° 4113, GJ 288, HD 63077, HIP 37853, HR 3018, SAO 198404.[8]
Database references

171 Puppis (171 Pup) is a triple[9] 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°.[10] 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.[11]


  1. ^ a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752Freely accessible, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357. 
  2. ^ a b c Mermilliod, J.-C. (1986), Compilation of Eggen's UBV data, transformed to UBV (unpublished), SIMBAD, Bibcode:1986EgUBV........0M. 
  3. ^ Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal, 132 (1): 161–170, arXiv:astro-ph/0603770Freely accessible, Bibcode:2006AJ....132..161G, doi:10.1086/504637. 
  4. ^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick, Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, 30, University of Toronto: International Astronomical Union, p. 57, Bibcode:1967IAUS...30...57E. 
  5. ^ Ammler-von Eiff, M.; Reiners, A. (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: A116, arXiv:1204.2459Freely accessible, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724. 
  6. ^ a b c d Bensby, T.; et al. (2014), "Exploring the Milky Way stellar disk. A detailed elemental abundance study of 714 F and G dwarf stars in the solar neighbourhood", Astronomy & Astrophysics, 562 (A71): 28, arXiv:1309.2631Freely accessible, Bibcode:2014A&A...562A..71B, doi:10.1051/0004-6361/201322631. 
  7. ^ Ammler-von Eiff, M.; Reiners, A. (June 2012), "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?", Astronomy & Astrophysics, 542: 31, arXiv:1204.2459Freely accessible, Bibcode:2012A&A...542A.116A, doi:10.1051/0004-6361/201118724, A116. 
  8. ^ "171 Pup -- Double or multiple star", SIMBAD Astronomical Database, Centre de Données astronomiques de Strasbourg, retrieved 2016-08-11. 
  9. ^ Tokovinin, Andrei; et al. (July 2012), "Revealing Companions to Nearby Stars with Astrometric Acceleration", The Astronomical Journal, 144 (1): 10, arXiv:1204.4206Freely accessible, Bibcode:2012AJ....144....7T, doi:10.1088/0004-6256/144/1/7, 7. 
  10. ^ Tokovinin, Andrei (August 2012), "Speckle Interferometry and Orbits of "Fast" Visual Binaries", The Astronomical Journal, 144 (2): 11, arXiv:1206.1882Freely accessible, Bibcode:2012AJ....144...56T, doi:10.1088/0004-6256/144/2/56, 56. 
  11. ^ Holberg, J. B.; et al. (November 2013), "Where are all the Sirius-like binary systems?", Monthly Notices of the Royal Astronomical Society, 435 (3): 2077–2091, arXiv:1307.8047Freely accessible, Bibcode:2013MNRAS.435.2077H, doi:10.1093/mnras/stt1433.