Collinder 140

Observation data (J2000.0 epoch)
Constellation	Taurus
Right ascension	07h 24m 53s[1]
Declination	−31° 52′ 23″[1]
Distance	1,226 ly (376 pc)[2]
Apparent magnitude (V)	3.5[3]
Apparent dimensions (V)	60′[1]
Physical characteristics
Estimated age	20 million years[4]
See also: Open cluster, List of open clusters

Collinder 140 is a nearby open cluster of stars in the constellation Canis Major. Based on the combined parallax measurements of nine cluster members, this cluster has an estimated parallax of 2.66 ± 0.13 mas, which is equivalent to a distance modulus of 8.11 ± 0.11, or a distance of 1,226 light-years (376 pc). The cluster has a density of 0.21 solar masses per cubic parsec; roughly double the density of stars near the Sun. It is about 20 million years of age.^[4]

References

1. ^ ^{a b c} The Astronomical Almanac. United States Naval Observatory. Nautical Almanac Office, Great Britain. p. H68. 
2. ^ van Leeuwen, F. (April 2009). "Parallaxes and proper motions for 20 open clusters as based on the new Hipparcos catalogue". Astronomy and Astrophysics 497 (1): 209–242. Bibcode 2009A&A...497..209V. doi:10.1051/0004-6361/200811382. 
3. ^ "C 0722-321 -- Cluster of Stars". SIMBAD. Centre de Données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=C+0722-321. Retrieved 2010-12-23. 
4. ^ ^{a b} Fitzgerald, M. P.; Miller, M.; Harris, G. L. H. (April 1980). "A spectroscopic and statistical study of Collinder 140". Monthly Notices of the Royal Astronomical Society 191: 95–114. Bibcode 1980MNRAS.191...95F.