|Observation data (J2000.0 epoch)|
|Right ascension||7h 58m 20s|
|Apparent magnitude (V)||3.8|
|Apparent dimensions (V)||30.0′|
|Mass||105 to 106 M☉|
|Other designations||NGC 2516, C96|
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.
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.
- Weule, Genelle (2010). "Beginner's Guide to the Night Sky : Summer Sky Tour". abc.com. Retrieved 15 April 2016.
- Ventrudo, Brian (2009). "ESA's 'The "Southern Beehive" Cluster". americaspace.com. Retrieved 15 April 2016.
- Papadopoulos, Leonidas (2014). "ESA's 'Mission: Impossible' Sees First Light: Gaia Opens Her Eyes to the Galaxy « AmericaSpace". americaspace.com. Retrieved 13 June 2014.
- Imaging the Southern Sky : An Amateur Astronomer’s Guide Chadwick, S., Cooper, I., pg.viii, Pub. Springer (2012)
- Burnham (1978), Vol I 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. arXiv:0810.1198. Bibcode:2009ApJ...691..212J. doi:10.1088/0004-637X/691/1/212.