NGC 6642 is a globular cluster located 26,700 light-years from Earth,[2] in the constellation Sagittarius. Many "blue stragglers" (stars which seemingly lag behind in their rate of aging) have been spotted in this globular, and it is known to be lacking in low-mass stars.[4]
NGC 6642 | |
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Observation data (J2000 epoch) | |
Constellation | Sagittarius |
Right ascension | 18h 31m 54.23s[1] |
Declination | −23° 28′ 34.1″ |
Distance | 26.7 ± 2.3 kly (8.2 ± 0.7 kpc)[2] |
Apparent dimensions (V) | 48" |
Physical characteristics | |
Mass | 1.09×105[3] M☉ |
Metallicity | = –1.26[3] dex |
Other designations | Cr 381, C 1828-235, ESO 522-32, GCl 97, Mel 203 |