Astronomy:NGC 2516
| NGC 2516 | |
|---|---|
 NGC 2516 | |
| Observation data (J2000.0 epoch) | |
| Constellation | Carina |
| Right ascension | 07h 58m 20s |
| Declination | −60° 52′ |
| Distance | 1.3 kly |
| Apparent magnitude (V) | 3.8 |
| Apparent dimensions (V) | 30.0′ |
| Physical characteristics | |
| Mass | 105 to 106[citation needed] M☉ |
| Other designations | NGC 2516, Caldwell 96, Cr 172 |
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]
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
- ↑ Weule, Genelle (2010). "Beginner's Guide to the Night Sky : Summer Sky Tour". abc.com. http://oneminuteastronomer.com/1135/southern-beehive-cluster/.
- ↑ Ventrudo, Brian (2009). "ESA's 'The "Southern Beehive" Cluster". americaspace.com. http://oneminuteastronomer.com/1135/southern-beehive-cluster/.
- ↑ Papadopoulos, Leonidas (2014). "ESA's 'Mission: Impossible' Sees First Light: Gaia Opens Her Eyes to the Galaxy « AmericaSpace". americaspace.com. http://www.americaspace.com/?p=52966.
- ↑ Imaging the Southern Sky : An Amateur Astronomer's Guide Chadwick, S., Cooper, I., pg.viii, Pub. Springer (2012)
- ↑ Robert Burnham Jr. (1978). Burnham's Celestial Handbook. p. 458.
- ↑ 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. doi:10.1088/0004-637X/691/1/212. Bibcode: 2009ApJ...691..212J.
- ↑ 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, doi:10.3847/1538-3881/ac18cd, Bibcode: 2021AJ....162..197B
Bibliography
- Burnham, Robert. Burnham's Celestial Handbook. Dover, 1978. ISBN:0-486-23567-X.
External links
- NGC 2516 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- SEDS – NGC 2516
Coordinates: 
07h 58m 20s, −60° 52′ 00″
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