| NGC 6940 | |
|---|---|
 | |
| Observation data (J2000 epoch) | |
| Right ascension | 20h 34m 26s[1] |
| Declination | +28° 17′ 00″[1] |
| Distance | 2,510 ly[2] (770 pc[2]) |
| Apparent magnitude (V) | 6.3[1] |
| Apparent dimensions (V) | 25' |
| Physical characteristics | |
| Estimated age | 720 millions years[2] |
| Other designations | Melotte 232 |
| Associations | |
| Constellation | Vulpecula |
NGC 6940 is an open cluster in the constellation Vulpecula. It was discovered by William Herschel in 1784. The cluster is nearly a billion years old and it is located 2,500 light years away. It is considered the finest open cluster in the constellation.[3]
- ^ a b c "NGC 6940". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-06-19.
- ^ a b c WEBDA: NGC 6940
- ^ Cite error: The named reference
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