NGC 6939 · open cluster
NGC 6939
NGC 6939 is an open cluster in the constellation Cepheus.
RA20h 31m 30sDec+60° 39' 43"
Identity & coordinates
Identification
- Primary designation
- NGC 6939
- All designations
- NGC 6939
- Object type
- Open Cluster
- Constellation
- Cepheus
- Best viewing
- Autumn · Winter
Coordinates & physical
- Right ascension (J2000)
- 20h 31m 30s
- Declination (J2000)
- +60° 39' 43"
- Apparent magnitude (V)
- —
- Distance
- —
Visibility tonight
The science
NGC 6939 is an open cluster in the constellation Cepheus. It was discovered by William Herschel in 1798. The cluster lies 2/3° northwest from the spiral galaxy NGC 6946. The cluster lies approximately 4,000 light years away and it is over a billion years old.
Summary adapted from Wikipedia · CC-BY-SA-4.0
References
- SIMBAD Not resolved
- NED Fetched May 8, 2026 View in NED ↗
- Wikipedia Fetched May 8, 2026 Read full article ↗
Wikipedia title resolved via id — the catalog designation was a Wikipedia article title directly.
1 merge conflict resolved
- coordinates: SIMBAD missing → NED used