Omicron Velorum

Source: Wikipedia, the free encyclopedia.
ο Velorum
Location of ο Velorum (circled)
Observation data
J2000.0
Constellation Vela
Right ascension 08h 40m 17.58553s[1]
Declination −52° 55′ 18.8002″[1]
Apparent magnitude (V) +3.60[2] (3.57 – 3.63[3])
Characteristics
Spectral type B3/5(V)[4]
U−B color index −0.62[2]
B−V color index −0.18[2]
Variable type SPB[3]
Distance
490 ± 30 ly
(151 ± 8 pc)
Absolute magnitude (MV)−2.48[6]
Details
Myr
HIP 42536, HR 3447, SAO
 236164
Database references
SIMBADdata

Omicron Velorum (ο Vel, ο Velorum) is a star in the constellation Vela. It is the brightest member of the loose naked eye open cluster IC 2391, also known as the ο Velorum Cluster.

A light curve for Omicron Velorum, plotted from TESS data[9]

Omicron Velorum is a blue-white

light years from Earth. A slowly pulsating B star, it ranges between magnitudes 3.57 and 3.63 over 2.8 days.[3]

The correct

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.[12][13] However, ο (omicron) is commonly used for stars in both Vela and Puppis. Some authors contend that Lacaille actually assigned a Latin lower case 'o' to this star,[14] while others suggest that ο Puppis should actually be a lower case 'o'.[15] In the Coelum Australe Stelliferum itself, this star is labelled ο (omicron) Argus (du Navire in the French edition), while ο Puppis is labelled (Latin) o Argus in puppi (Pouppe du Navire in the French edition).[16][17]

References

  1. ^
    S2CID 18759600
  2. ^
    Bibcode:1966CoLPL...4...99J
  3. ^
    Bibcode:2009yCat....102025S
    .
  4. ^
    Bibcode:1978MSS...C02....0H
    .
  5. S2CID 119231169
    .
  6. S2CID 119257644
    .
  7. ^
    S2CID 17497112
  8. ISSN 0035-8711
    .
  9. ^ "MAST: Barbara A. Mikulski Archive for Space Telescopes". Space Telescope Science Institute. Retrieved 24 September 2022.
  10. S2CID 244398875
    . Gaia DR3 record for this source at VizieR.
  11. Bibcode:2014yCat....1.2023S
    .
  12. ^ Coelum australe stelliferum ... H L Guerin & L F Delatour. 1763. pp. 7–.
  13. Bibcode:2004yCat.4027....0K
    .
  14. Bibcode:1982bsc..book.....H
    .
  15. ISBN 0-939923-78-5
    .
  16. ^ La Caille, Nicolas Louis de. "Coelum Australe Stelliferum". Retrieved 2017-07-21.
  17. ^ La Caille, Nicolas Louis de. "Coelum Australe Stelliferum". Retrieved 2017-07-21.
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