NGC 1647 is an open cluster of stars in the constellation of Taurus. It contains nearly 90 stars and it lies at a distance of 550 parsec. This cluster is visible with binoculars close to Aldebaran. It was discovered by German-English astronomer William Herschel in 1784. NGC 1647 is located behind the Taurus dark nebula complex which is approximately 160 parsec away. The brightest main sequence stars are of spectral type B7. Its age is estimated to be about 200 million years.
Open cluster in the constellation Taurus
NGC 1647
All data from the card 8
- Right ascension
- 04h 45m 55s
- Declination
- ±19° 06′ 54″
- Distance
- 1,800 ly (550 pc)
- Apparent magnitude (V)
- 6.4
- Apparent dimensions (V)
- 40′
- Estimated age
- 203 ± 27 Myr
- Other designations
- Cr 54, Pirate Moon Cluster
- Constellation
- Taurus
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