Abstract
Photoelectric and photographic photometry of 72 stars was done in the field of the not-well-studied open cluster Czernik 20= OCl 427 in the direction of the Auriga constellation. Of these stars, a total of 43 have been found to be probable members down tom v− 15.75 mag. There is apparently a variable extinction across the field of the cluster withE(B-V) ranging from 0.53 to 0.38 mag. The cluster stars show a range in their ages from 1.0 × 107 to 7.1 × 107 years, indicating that Czernik 20 is young enough to be considered as a spiral-arm tracer in the study of our Galaxy. The distance of this cluster is found to be 4.27 ±0.14 kpc and it is located inside the outer Perseus arm of the Milky Way
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Babu, G.S.D. Study of young open clusters as tracers of spiral features in our galaxy. Paper 4: Czernik 20 (OCl 427). J. Astrophys. Astr. 10, 295–306 (1989). https://doi.org/10.1007/BF02715002
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DOI: https://doi.org/10.1007/BF02715002