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NGC 2516 (also known as Caldwell 96) is an open star cluster in the southern sky in the constellation Carina discovered by Abbe Lacaille in 1751-1752. It is also called Southern Beehive[1][2] or the Sprinter.[3][4]

NGC 2516
NGC 2516
Observation data (J2000.0 epoch)
ConstellationCarina
Right ascension07h 58m 20s
Declination−60° 52′
Distance1.3 kly
Apparent magnitude (V)3.8
Apparent dimensions (V)30.0′
Physical characteristics
Mass105 to 106[citation needed] M☉
Other designationsNGC 2516, Caldwell 96, Cr 172
See also: Open cluster, List of open clusters

Description


This bright cluster itself is easily visible with the naked eye as a hazy patch, but is resolvable into stars using binoculars. It contains two 5th magnitude red giant stars and three main visual double stars: HJ 4027, HJ 4031 and I 29. A small telescope would be required to split the double stars, which are all pairs of 8-9 magnitude and 1-10 arcseconds separation.[5]

NGC 2516 and the recently discovered nearby star cluster Mamajek 2 in Ophiuchus have similar age and metallicity. Recently, kinematic evidence was presented by E. Jilinski and coauthors that suggests that these two stellar groups may have formed in the same star-forming complex some 135 million years ago.[6]

The cluster is surrounded by the 500-parsec diameter halo consisting of stars ejected from cluster.[7]


References


  1. Weule, Genelle (2010). "Beginner's Guide to the Night Sky : Summer Sky Tour". abc.com. Retrieved 15 April 2016.
  2. Ventrudo, Brian (2009). "ESA's 'The "Southern Beehive" Cluster". americaspace.com. Retrieved 15 April 2016.
  3. Papadopoulos, Leonidas (2014). "ESA's 'Mission: Impossible' Sees First Light: Gaia Opens Her Eyes to the Galaxy « AmericaSpace". americaspace.com. Retrieved 13 June 2014.
  4. Imaging the Southern Sky : An Amateur Astronomer’s Guide Chadwick, S., Cooper, I., pg.viii, Pub. Springer (2012)
  5. Robert Burnham Jr. (1978). "Burnham's Celestial Handbook": 458. {{cite journal}}: Cite journal requires |journal= (help)
  6. Jilinski, E.; Ortega, V.G.; de la Reza, R.; Drake, N.A.; et al. (2009). "Dynamical Evolution and Spectral Characteristics of the Stellar Group Mamajek 2". Astrophysical Journal. 691 (1): 212. arXiv:0810.1198. Bibcode:2009ApJ...691..212J. doi:10.1088/0004-637X/691/1/212. S2CID 15570695.
  7. Bouma, L. G.; Curtis, J. L.; Hartman, J. D.; Winn, J. N.; Bakos, G. Á. (2021), "Rotation and Lithium Confirmation of a 500 pc Halo for the Open Cluster NGC 2516", The Astronomical Journal, 162 (5): 197, arXiv:2107.08050, Bibcode:2021AJ....162..197B, doi:10.3847/1538-3881/ac18cd, S2CID 236088158

Bibliography



Wikimedia Commons has media related to NGC 2516.


На других языках

[de] NGC 2516

NGC 2516 ist ein Offener Sternhaufen vom Typ I3r im Sternbild Kiel des Schiffs am Südsternhimmel. Er hat eine scheinbare Helligkeit von 3,8 mag und einen Durchmesser von 22 Bogenminuten. Der Haufen ist rund 1.300 Lichtjahre vom Sonnensystem entfernt und hat einen Durchmesser von etwa 12 Lichtjahren. Sein Alter wird auf 135 Millionen Jahre geschätzt.
- [en] NGC 2516

[es] NGC 2516

NGC 2516 es un cúmulo abierto en la constelación de la Quilla. Es fácilmente visible a simple vista en un sitio sin contaminación lumínica, se puede encontrar a 3° al sureste de Avior, Ocasionalmente es conocido como el Pesebre del Sur, por su similitud con el cúmulo M44. Está formado por más de 400 estrellas, la más brillante de ellas es la gigante roja HD 63342 cerca del centro de magnitud aparente +5,18. Es un cúmulo muy joven, con una edad de tan sólo 150 millones de años.

[ru] NGC 2516

NGC 2516 (другие обозначения — OCL 776, ESO 124-SC6) — рассеянное скопление в созвездии Киль.


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