Globular Cluster NGC 6934

NGC 6934
NGC 6934: Image taken with Hubble Space Telescope. © 2010 ESA/Hubble & NASA [585]

History

This globular cluster was discovered by William Herschel on 24 September 1785 using his 18.7 inch reflecting telescope. He cataloged it as I 103 (class I = bright nebulae) and noted: «Very bright, large, gradually much brighter in the middle, easly resolvable, beautiful object.» [464] His son John listed the object in 1833 as a globular cluster with the designation h 2081. [466] Dreyer cataloged it in 1888 as NGC 6934. [313]

Physical Properties

Revised+Historic NGC/IC Version 22/9, © 2022 Dr. Wolfgang Steinicke [277]
Designation NGC 6934
Type GCL (VIII)
Right Ascension (J2000.0) 20h 34m 11.6s
Declination (J2000.0) +07° 24' 17"
Diameter 7.1 arcmin
Visual magnitude 8.9 mag
Metric Distance 15.600 kpc
Dreyer Description globular, B, L, R, rrr, st 16…, * 9 p
Identification, Remarks WH I 103; h 2081; GC 4585=4586; GCL 117

Finder Chart

The globular cluster NGC 6934 is located in the constellation Delphinus. The best observation time is April to November.

Finder Chart Globular Cluster NGC 6934
Globular Cluster NGC 6934 in constellation Delphinus. Charts created using SkySafari 6 Pro and STScI Digitized Sky Survey. Limiting magnitudes: Constellation chart ~6.5 mag, DSS2 close-ups ~20 mag. [149, 160]

Objects Within a Radius of 20°

Abell 58
Abell 62
Abell 63
Abell 64
Abell 67
Abell 68
Abell 70
Abell 72
Abell 74
Abell 76
Messier 2
Messier 15
Dumbbell Nebula
Messier 27
Messier 71
NGC 6781
NGC 6804
NGC 6852
NGC 6885
NGC 6891
Cocktail
NGC 6905
NGC 7006
NGC 7094
Pease 1
Roslund 3
Vyssotsky 2-2

References

  • [149] SkySafari 6 Pro, Simulation Curriculum; skysafariastronomy.com
  • [160] The STScI Digitized Sky Survey; archive.stsci.edu/cgi-bin/dss_form
  • [277] «Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; klima-luft.de/steinicke (2021-02-17)
  • [313] «A New General Catalogue of Nebulae and Clusters of Stars, being the Catalogue of the late Sir John F.W. Herschel, Bart., revised, corrected, and enlarged» Dreyer, J. L. E. (1888); Memoirs of the Royal Astronomical Society. 49: 1–237; Bibcode:1888MmRAS..49....1D
  • [464] «Catalogue of a second thousand of new nebulae and clusters of stars; with a few introductory remarks on the construction of the heavens» William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1789; DOI:10.1098/rstl.1789.0021
  • [466] «Observations of nebulæ and clusters of stars, made at Slough, with a twenty-feet reflector, between the years 1825 and 1833» John Frederick William Herschel, Philosophical Transactions of the Royal Society of London, 1 January 1833, Pages: 359-505; DOI:10.1098/rstl.1833.0021
  • [585] A Distant backwater of the Milky Way; esahubble.org/images/potw1023a (2023-01-28)