| NGC 6642 | |
|---|---|
 Image of NGC 6642 was created from visible and infrared images taken with the Wide Field Channel of the Advanced Camera for Surveys. | |
| Observation data (J2000epoch) | |
| Class | V? |
| 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 | [Fe/H] = –1.26[3]dex |
| Other designations | Cr 381, C 1828-235, ESO 522-32, GCl 97, Mel 203 |
| See also:Globular cluster,List of globular clusters | |
NGC 6642 is aglobular cluster located 26,700 light-years from Earth,[2] in the constellationSagittarius. 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]
During theJune 2094 lunar eclipse, atotal lunar eclipse, it will be occulted by theMoon overNew Guinea,Northern Australia and thePacific Ocean.[5]: 161
Media related toNGC 6642 at Wikimedia Commons | This star cluster–related article is astub. You can help Wikipedia byadding missing information. |
