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Photoelectric photometry of the open cluster Tr-1 |
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| Authors: | U C Joshi Ram Sagar |
| Institution: | (1) Uttar Pradesh State Observatory, Naini Tal, India |
| Abstract: | The H-R diagram of the open cluster Tr-1 based on Oja-membership andU, B, V photoelectric photometry is presented. The colour excessE(B-V) is 0 . m 52. The distance modulus to the cluster and its age are, respectively, estimated at 11 . m 6 and 2.6×107 yr. |
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