Open Cluster NGC 1245

NGC 1245
NGC 1245: Open cluster in Perseus; 500 mm Cassegrain f=3625 mm f/7.2; SBIG STL11K; 80+3*55 min LRGB; Bernese Highlands; © 2015 Radek Chromik


The open star cluster NGC 1245 was discovered on December 11, 1786 by the German-British astronomer Wilhelm Herschel with its 18.7 inch reflector. It has an apparent visual magnitude of 8.4 magnitudes and is of the Tumpler type III1r. [196] [196]

Physical Properties

NGC 1245 is a rich, old, open star cluster with 870 stars. Its age is estimated to be 1.04 ± 0.09 billion years. Its metallicity [Fe/H] = -0.05 ± 0.08 is somewhat lower than that of the sun. The distance in the direction of the galactic anticenter is 2.8 ± 0.2 kpc. The radius of the cluster is 3.10 ± 0.52 arc minutes (2.57 ± 0.43 pc). The total mass of the cluster is estimated to be 2700 ± 600 solar masses. [379, 380]

«Revised New General Catalogue and Index Catalogue» Dr. Wolfgang Steinicke, 2021 [277]
DesignationNGC 1245
TypeOCL (III1r)
Right Ascension03h 14m 41.4s
Declination+47° 14' 19"
Diameter10.00 arcmin
Visual magnitude8.4 mag
Dreyer DescriptionCl, pL, Ri, C, iR, st 12…15
IdentificationOCL 389

Finder Chart

The open star cluster NGC 1245 is located in the constellation Perseus. The best observation time is September to February.

Chart NGC 1245
Chart created using SkySafari 6 Pro and STScI Digitized Sky Survey. [149, 160]


149SkySafari 6 Pro, Simulation Curriculum;
160The STScI Digitized Sky Survey;
196Celestial Atlas by Curtney Seligman; (2020-12-28)
277«Historische Deep-Sky Kataloge» von Dr. Wolfgang Steinicke; (2021-02-17)
379«Survey for Transiting Extrasolar Planets in Stellar Systems. IV. Variables in the Field of NGC 1245» Joshua Pepper1 and Christopher J. Burke1; Published 2006 July 27; The Astronomical Journal, Volume 132, Number 3; DOI:10.1086/505942
380«Survey for Transiting Extrasolar Planets in Stellar Systems. I. Fundamental Parameters of the Open Cluster NGC 1245» Christopher J. Burke, B. Scott Gaudi, D. L. DePoy, Richard W. Pogge, and Marc H. Pinsonneault; The Astronomical Journal, Volume 127, Number 4, 2004;; DOI:10.1086/382720