NGC 6934
Sign in to saveglobular cluster in the constellation Delphinus
In the Vinony graph
Vinony's link graph records 437 inbound references to NGC 6934, and connects out to list of NGC objects (6001–7000), globular cluster and list of stars in Delphinus.
It is catalogued under topics including Astronomical objects discovered in 1785, Caldwell objects and Delphinus.
Vinony links it to 36 Wikipedia language editions.
Key facts
- Class
- VIII
- Constellation
- Delphinus
- Right ascension
- 20 34 11.37
- Declination
- +07 ° 24 ′ 16.1 ″
- Distance
- 52 kly (16 kpc )
- Apparent dimensions v
- 1.20 ′
- Absolute magnitude
- −7.65
- Mass
- 2.95 × 10 M ☉
- Metallicity
- [ Fe/H ] = –1.47 dex
- Other designations
- Caldwell 47, NGC 6934
via Wikipedia infobox
Wikidata facts
- Instance of
- globular cluster
- Part of
- Milky Way
- Constellation
- Delphinus
- Distance from Earth
- 0.016
- Image
- NGC 6934 Hubble WikiSky.jpg
Show 11 more facts
- catalog code
- [KPS2012] MWSC 3369
- Commons category
- NGC 6934
- discoverer or inventor
- William Herschel
- time of discovery or invention
- 1785-09-24
- apparent magnitude
- 8.572
- right ascension
- 308.547375
- declination
- 7.404472
- epoch
- J2000.0
- radial velocity
- -411.4
- right ascension component of proper motion
- -2.93
- declination component of proper motion
- -4.20
Sources (1)
via Wikidata · CC0
~1 min read
Encyclopedic overview
NGC 6934 (also known as Caldwell 47) is a globular cluster of stars in the northern constellation of Delphinus, about 52 kilolight-years distant from the Sun. It was discovered by the German-born astronomer William Herschel on 24 September 1785. The cluster is following a highly eccentric orbit (with an eccentricity of 0.81) through the Milky Way along an orbital plane that is inclined by 73° to the galactic plane. It may share a common dynamic origin with NGC 5466. As of 2018, it has been poorly studied.
This appears to be a Oosterhoff type I cluster with an intermediate metallicity. It has an Shapley–Sawyer Concentration Class of VIII, with a core radius of 15″ and a half-light radius of 36″. The estimated mass is 295,000 times the mass of the Sun. The cluster displays photometric anomalies, with a split subgiant branch on the HR diagram. Searches for variable stars have discovered 85 in the cluster field, of which 79 are of the RR Lyrae class and one is a SX Phe variable. There is some evidence for a tidal tail.
Excerpted from Wikipedia’s “NGC 6934” article, available under the CC BY-SA 4.0 licence.