NGC 2516

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NGC 2516
NGC 2516 in Carina.jpg
Observation data (J2000.0 epoch)
Right ascension 7h 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 M
Other designations NGC 2516, C96

NGC 2516 is an open star cluster in the southern sky in the constellation Carina discovered by Abbe Lacaille in 1751-1752. It has no commonly accepted name, and is mostly referred as NGC 2516. Recently it was coined the Sprinter[1] in 2012 by Chadwick & Cooper.[2]

Description[edit]

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.[3]

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. Jilinksi and coauthors that suggests that these two stellar groups may have formed in the same star-forming complex some 135 million years ago.[4]

References[edit]

  1. ^ Papadopoulos, Leonidas (2014). "ESA’s ‘Mission: Impossible’ Sees First Light: Gaia Opens Her Eyes to the Galaxy « AmericaSpace". americaspace.com. Retrieved 13 June 2014. 
  2. ^ "Imaging the Southern Sky : An Amateur Astronomer’s Guide" Chadwick, S., Cooper, I., pg.viii, Pub. Springer (2012)
  3. ^ Burnham (1978), Vol I p.458
  4. ^ Jilinski, E., Ortega, V.G., de la Reza, R., Drake, N.A., and Bazzanella, B. (2009). "Dynamical Evolution and Spectral Characteristics of the Stellar Group Mamajek 2". Astrophysical Journal 691 (1): 212. Bibcode:2009ApJ...691..212J. doi:10.1088/0004-637X/691/1/212. 

Bibliography[edit]