NGC 7789

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NGC 7789
NGC 7789 taken with an amateur telescope
Credit: Hewholooks
Observation data (J2000.0 epoch)
Right ascension 23h 57m 24s[1]
Declination+56° 42′ 30″[1]
Distance7.6 kly (2,337[2])
Apparent magnitude (V)6.7
Apparent dimensions (V)16′[2]
Physical characteristics
Mass6,620.4 ± 762.5[3] M
Estimated age1.7 GYr[2]
Other designationsWhite Rose Cluster or Caroline's Rose Cluster
See also: Open cluster, List of open clusters

NGC 7789 is an open cluster in Cassiopeia that was discovered by Caroline Herschel in 1783. Her brother William Herschel included it in his catalog as H VI.30. This cluster is also known as "The White Rose" Cluster or "Caroline's Rose" Cluster because when seen visually, the loops of stars and dark lanes look like the swirling pattern of rose petals as seen from above.


  1. ^ a b Xin, Y; Deng, L (2005). "Blue Stragglers in Galactic Open Clusters and Integrated Spectral Energy Distributions". The Astrophysical Journal. 619 (2): 824–838. arXiv:astro-ph/0410325. Bibcode:2005ApJ...619..824X. doi:10.1086/426681.
  2. ^ a b c Kharchenko, N. V; Piskunov, A. E; Röser, S; Schilbach, E; Scholz, R.-D (2005). "Astrophysical parameters of Galactic open clusters". Astronomy and Astrophysics. 438 (3): 1163–1173. arXiv:astro-ph/0501674. Bibcode:2005A&A...438.1163K. doi:10.1051/0004-6361:20042523.
  3. ^ Wu, Zhen-Yu; Du, Cui-Hua; Ma, Jun; Zhou, Xu (2009). "Mass of Open Cluster NGC 7789". Chinese Physics Letters. 26 (2): 029701. Bibcode:2009ChPhL..26b9701W. doi:10.1088/0256-307X/26/2/029701.

External links[edit]

Coordinates: Sky map 23h 57m 24s, +56° 42′ 30″

Map showing location of NGC 7789