Omicron Puppis

From Wikipedia, the free encyclopedia
Jump to: navigation, search
ο Puppis
Puppis constellation map.svg
Red circle.svg

Location of ο Puppis (circled)
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Puppis
Right ascension 07h 48m 05.17s
Declination −25° 56' 13.8"
Apparent magnitude (V) +4.40
Distance 2470 ly
(757 pc)
Spectral type B1IV
Other designations
ο Puppis, ο Pup, Omicron Pup, CCDM J07481-2556A, CPD−25  2882, GC 10532, HD 63462, HIP 38070, HR 3034, HR 3045, IDS 07439-2541 A, PPM 253217, SAO 174558, WDS J07481-2556A.
Database references

Omicron Puppis (Omicron Pup, ο Puppis, ο Pup) is multiple star system in constellation of Puppis, with an apparent magnitude of +4.40. The primary component is a blue B-type subgiant. It is approximately 2470 light years from Earth.


The correct Bayer designation for ο Puppis has been debated. Lacaille assigned one Greek letter sequence for the bright stars of Argo Navis. These Lacaille designations are now shared across the three modern constellations of Carina, Puppis, and Vela so that the same Greek letter is not usually found in more than one of the three.[1][2] However, ο (omicron) is commonly used for stars in both Puppis and Vela. Some authors contend that Lacaille actually assigned a Latin lower case 'o' to this star,[3] while others suggest that ο Velorum should actually be a lower case 'o'.[4]

In Chinese, 弧矢 (Hú Shǐ), meaning Bow and Arrow,[5] refers to an asterism consisting of ο Puppis, δ Canis Majoris, η Canis Majoris, HD 63032, HD 65456, k Puppis, ε Canis Majoris, κ Canis Majoris and π Puppis. Consequently, ο Puppis itself is known as 弧矢五 (Hú Shǐ wǔ, English: the Fifth Star of Bow and Arrow.)[6]


ο Puppis is slightly variable. The General Catalogue of Variable Stars lists it as a possible Be star with a magnitude range of 4.43 - 4.46.[7] The International Variable Star Index classifies it as a Lambda Eridani variable.[8]

Runaway star[edit]

Omicron Puppis is moving through the Galaxy at a speed of 26.9 km/s relative to the Sun. Its projected Galactic orbit carries it between 24,800 and 32,000 light years from the center of the Galaxy.[9]

Omicron Puppis came closest to the Sun 8.7 million years ago when it had brightened to magnitude 3.99 from a distance of 1,162 light years.[9]


  1. ^ Coelum australe stelliferum ... H L Guerin & L F Delatour. 1763. pp. 7–. 
  2. ^ Kostjuk, N. D. (2004). "VizieR Online Data Catalog: HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index (Kostjuk, 2002)". VizieR On-line Data Catalog: IV/27A. Originally published in: Institute of Astronomy of Russian Academy of Sciences (2002). 4027. Bibcode:2004yCat.4027....0K. 
  3. ^ Wagman, Morton (2003). Lost Stars. McDonald and Woodward. p. 259. ISBN 0-939923-78-5. 
  4. ^ Hoffleit, D.; Jaschek, C. (1982). "The Bright Star Catalogue". The Bright Star Catalogue. Bibcode:1982BS....C......0H. 
  5. ^ 弧矢 (Hú Shǐ) is westernized into Koo She. R.H. Allen had opinion that Koo She refers to the asterism including δ Velorum and ω Velorum. AEEA opinion is, δ Velorum is member of 天社 (Tiān Shè), meaning Celestial Earth God's Temple asterism and ω Velorum is not member of any asterisms. 天社 (Tiān Shè) is westernized into Tseen She and R.H.Allen used the term Tseen She for Chinese name of η Carinae. See Richard Hinckley Allen: Star Names — Their Lore and Meaning: Argo Navis and (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 17 日.
  6. ^ (Chinese) AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 17 日
  7. ^ 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....102025S. 
  8. ^ Watson, C. L. (2006). "The International Variable Star Index (VSX)". The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science. Held May 23-25. 25: 47. Bibcode:2006SASS...25...47W. 
  9. ^ a b Omicron Puppis (HIP 38070)[dead link]