OU Puppis

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This article is about L1 Puppis. For other stars with this Bayer designation, see L Puppis.
OU Puppis
Puppis constellation map.svg
Red circle.svg

Location of OU Puppis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Puppis
Right ascension 07h 13m 13.35019s[1]
Declination −45° 10′ 57.8550″[1]
Apparent magnitude (V) 4.87[2]
Spectral type A0pSi[3]
U−B color index -0.07[4]
B−V color index -0.03[4]
Variable type α² CVn[5]
Radial velocity (Rv) +4.30[6] km/s
Proper motion (μ) RA: -25.36[1] mas/yr
Dec.: -87.51[1] mas/yr
Parallax (π) 17.69 ± 0.14[1] mas
Distance 184 ± 1 ly
(56.5 ± 0.4 pc)
Absolute magnitude (MV) 1.11[2]
Mass 2.36[7] M
Radius 2.0[7] R
Luminosity 36.48[2] L
Surface gravity (log g) 4.26[8] cgs
Temperature 10,413[8] K
Rotational velocity (v sin i) 34[8] km/s
Other designations
L1 Puppis, OU Pup, CD-44°3223, GC 9591, GSC 08119-01757, HIP 34899, HR 2746, HD 56022, SAO 218546
Database references

OU Puppis (OU Pup) is a class A0[3] (white main-sequence) star in the constellation Puppis. Its apparent magnitude is 4.87[2] and it is approximately 184.4 light years away based on parallax.[1]

It is an α² CVn variable, ranging from 4.93 to 4.86 magnitude with a period of 0.92 days.[5]

Unlike the majority of star pairs, the number attached to the Bayer designation 'L' is generally a subscript: L1. Its better-known companion L2 Puppis is similarly represented.[9]


  1. ^ a b c d e f Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  2. ^ a b c d Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  3. ^ a b 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. Bibcode:1995yCat.5050....0H. 
  4. ^ a b Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M. Vizier catalog entry
  5. ^ a b Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....1.2025S. 
  6. ^ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336. 
  7. ^ a b Allende Prieto, C.; Lambert, D. L. (1999). "Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures". Astronomy and Astrophysics. 352: 555. arXiv:astro-ph/9911002Freely accessible. Bibcode:1999A&A...352..555A.  Vizier catalog entry
  8. ^ a b c David, Trevor J.; Hillenbrand, Lynne A. (2015). "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal. 804 (2): 146. arXiv:1501.03154Freely accessible. Bibcode:2015ApJ...804..146D. doi:10.1088/0004-637X/804/2/146.  Vizier catalog entry
  9. ^ Robert Burnham (1978). Burnham's Celestial Handbook: An Observer's Guide to the Universe Beyond the Solar System. Courier Corporation. ISBN 978-0-486-23673-5.