Astronomy:Chi Puppis

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χ Puppis
Puppis constellation map.svg
Red circle.svg
Location of χ Puppis (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Puppis
Right ascension  07h 57m 40.10643s[1]
Declination −30° 20′ 04.4523″[1]
Apparent magnitude (V) 4.79[2]
Spectral type A5 II[3]
U−B color index +0.16[2]
B−V color index +0.15[2]
Radial velocity (Rv)+30.00[4] km/s
Proper motion (μ) RA: -7.85[1] mas/yr
Dec.: +6.94[1] mas/yr
Parallax (π)2.69 ± 0.22[1] mas
Distance1,210 ± 100 ly
(370 ± 30 pc)
Absolute magnitude (MV)−3.20[5]
Luminosity1419[6] L
Surface gravity (log g)2.17[7] cgs
Temperature7,810[7] K
Other designations
chi Pup, CD-29°5236, FK5 1210, GC 10774, GSC 07120-02422, HIP 38901, HR 3113, HD 65456, NSV 3830, SAO 198636
Database references

χ Puppis, Latinised as Chi Puppis, (HD 65456) is a class A5II[3] (white bright giant) star in the constellation Puppis. Its apparent magnitude is 4.79[2] and it is approximately 1210 light years away based on parallax.[1]

In his star atlas Neue Uranometrie, Friedrich Wilhelm Argelander labelled this star as χ Argo. It was probably labelled as χ by Bayer in the original Uranometria, although Bayer's chart is somewhat fanciful. Nicolas-Louis de Lacaille changed Bayer's designations in Argo Navis and applied χ to the star now called χ Carinae.[8]


  1. 1.0 1.1 1.2 1.3 1.4 1.5 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653. doi:10.1051/0004-6361:20078357. Bibcode2007A&A...474..653V. 
  2. 2.0 2.1 2.2 2.3 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues 2237. Bibcode2002yCat.2237....0D. 
  3. 3.0 3.1 Gray, R. O.; Napier, M. G.; Winkler, L. I. (2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. I. Precise Spectral Types for 372 Stars". The Astronomical Journal 121 (4): 2148. doi:10.1086/319956. Bibcode2001AJ....121.2148G. 
  4. Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters 32 (11): 759. doi:10.1134/S1063773706110065. Bibcode2006AstL...32..759G. 
  5. Eggen, Olin J. (1996). "The Stellar Content of Star Stream I". Astronomical Journal 111: 1615. doi:10.1086/117901. Bibcode1996AJ....111.1615E. 
  6. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode2012AstL...38..331A.  Vizier catalog entry
  7. 7.0 7.1 Gray, R. O.; Graham, P. W.; Hoyt, S. R. (2001). "The Physical Basis of Luminosity Classification in the Late A-, F-, and Early G-Type Stars. II. Basic Parameters of Program Stars and the Role of Microturbulence". The Astronomical Journal 121 (4): 2159. doi:10.1086/319957. Bibcode2001AJ....121.2159G. 
  8. Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H 5050. Bibcode1995yCat.5050....0H. 

External links