Messier 107
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| Globular cluster | List of globular clusters |
|---|---|
Messier 107, from 2MASS |
|
| Observation data (Epoch J2000) |
|
| Class | X |
| Constellation | |
| Right ascension | 16h 32m 31.91s[1] |
| Declination | -13° 03′ 13.1″[1] |
| Distance | 20.9 kly (6.4 kpc) |
| Apparent magnitude (V) | +8.85[1] |
| Apparent dimensions (V) | 13′.0 |
| Physical characteristics | |
| Mass | ( M☉) |
| Radius | 39.5 [2] |
| VHB | |
| Estimated age | |
| Notable features | |
| Other designations | NGC 6171, GCl 44[1] |
Globular Cluster M107 (also known as Messier Object 107 or NGC 6171) is a very loose globular cluster in the constellation Ophiuchus. It was discovered by Pierre Méchain in April 1782 and independently by William Herschel in 1793. It wasn't until 1947 that Helen Sawyer Hogg added the object to the list of Messier objects as number 107.
M107 is close to the galactic plane at a distance of about 20,900 light-years from Earth. There are 25 known variable stars in this cluster.
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