171 G. Puppis

Star in the constellation Puppis 171 G. Puppis J2000.0 Puppis A 07 45 35.02168 -34 10 20.5143 5.38 B 07 45 38.42749 -33 55 51.3414 16.7 A Subgiant5588607120530408832 F9 V +0.56 −0.085 A +102.6 −221.54 +1,722.11 65.75 0.51 +4.57 Aa Ab 8406 29 7 commas days 9.15 0.31 0.33 AU 0.443 0.002 0.001 184.38 0.16 0.17 4.762 0.013 Aa 0.85 1.13 0.10 0.09 1.80 0.49 0.28 -0.78 0.06 4.34 0.07 0.09 5858 70 commas 4.4 Ab 0.42 0.03 ≥ y B 0.507 0.007 logLT -4.2076 4405 4radius 6.2 -5 4405 15 commas 7.882 0.008 288 63077 3018 A −33°4113 37853 3018 198404 B VB 3, 0743-336 GJ+288+A A GJ+288+B B 00591 A 00592 B 171 G. Puppis (171 Pup) is a triple 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 23 years. The orbit has a semi-major axis of 9.15 AU and a mild eccentricity of 0.443. The primary has a spectral class of F9V, matching a late F-type main-sequence star. However, stellar evolution models suggest it has left the main sequence and is now a subgiant.20.2.1 astrophysical_parameters‣ 20.2 Astrophysical parameter tables ‣ Chapter 20 Datamodel description ‣ Part V Gaia archive ‣ Gaia Data Release 3 Documentation release 1.3 https://gea.esac.esa.int/archive/documentation/GDR3/Gaia_archive/chap_datamodel/sec_dm_astrophysical_parameter_tables/ssec_dm_astrophysical_parameters.html#astrophysical_parameters-evolstage_flame 2025-06-01 gea.esac.esa.int Little is known about the secondary, but its mass should be at least 0.42. 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 with a classification of DC11.0 and a temperature of 4,600 K, making it one of the coolest white dwarfs known. 171 G. Puppis is believed to be among the oldest star systems in the solar neighbourhood, being of the Population II. The primary's metal-to-hydrogen ratio is a logarithm of -0.78, translating to 16% of the Sun's abundance. In the early universe, the metallicity of the interstellar medium was much lower than that of the current universe.Populations I and II Definition, Examples, & Facts Britannica https://www.britannica.com/science/Population-I 2025-06-01 Britannica en Notes radius Calculated, using the Stefan-Boltzmann law and the star's effective temperature and luminosity, with respect to the solar nominal effective temperature of commas 5,772 K: References 5588614164276695424 2018ApJS..235....6T The Updated Multiple Star Catalog Tokovinin Andrei The Astrophysical Journal Supplement Series 2018 235 1 6 10.3847/1538-4365/aaa1a5 free 1712.04750 van Leeuwen F. Validation of the new Hipparcos reduction Astronomy and Astrophysics 474 2 653–664 2007 0708.1752 2007A&A...474..653V 10.1051/0004-6361:20078357 18759600 . Ammler-von Eiff Matthias Reiners Ansgar New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars? 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Brown dwarfs and stellar companions unveiled by radial velocity and astrometry Astronomy & Astrophysics en 674 A114 10.1051/0004-6361/202345874 2303.16717 2023A&A...674A.114B 0004-6361 . 171 Pup A's database entry at VizieR. Evans D. S. June 20–24, 1966 Batten Alan Henry Heard John Frederick The Revision of the General Catalogue of Radial Velocities Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 30 57 University of Toronto International Astronomical Union 1967IAUS...30...57E . 1 Holberg J. B. Oswalt T. D. Sion E. M. Barstow M. A. Burleigh M. R. Where are all the Sirius-like binary systems? Monthly Notices of the Royal Astronomical Society 435 3 2077–2091 November 2013 10.1093/mnras/stt1433 free 2013MNRAS.435.2077H . 1307.8047 Fuhrmann Klaus Chini Rolf 2021-03-11 On ancient solar-type stars – II Monthly Notices of the Royal Astronomical Society 501 4 4903–4916 10.1093/mnras/staa3942 free 0035-8711 . 1 Tokovinin Andrei Hartung Markus Hayward Thomas L. Makarov Valeri V. Revealing Companions to Nearby Stars with Astrometric Acceleration The Astronomical Journal 144 1 7 10 July 2012 10.1088/0004-6256/144/1/7 2012AJ....144....7T 1204.4206 30955275 . Mermilliod J.-C. Compilation of Eggen's UBV data, transformed to UBV (unpublished) Catalogue of Eggen's UBV Data 1986 SIMBAD 1986EgUBV........0M . 171 Pup -- Double or multiple star SIMBAD Astronomical Database Centre de Données astronomiques de Strasbourg http://simbad.u-strasbg.fr/simbad/sim-id?Ident=HD+63077 2016-08-11 . Category:Puppis Puppis, 171 Category:Durchmusterung objects 037853 3018 063077 0288 Category:Triple star systems Category:White dwarfs Category:F9V stars