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Wide- and narrow-band photometry of stars in a field around Collinder 135
A field of about 10,000 square arcmin around the cluster Cr 135 isstudied using UBV, H-alpha, and H-beta photometries. The photometricdata do not favor the existence of Cr 135 as a real open cluster. Onlyeight B-type stars lie on a very well-defined main sequence in the UBVphotometric diagrams. These eight stars - which are shown not to begravitationally bound - are located at a mean distance of 630 pc with aforeground color excess amounting to E(B-V) equals 0.06 magnitudes.These stars, together with most of the B stars in the region, can beconsidered probable members of the large, old, Pup-Can association.
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Gözlemler ve gökölçümü verileri
| Takýmyýldýz: | Pupa |
| Sað Açýklýk: | 07h22m36.30s |
| Yükselim: | -37°02'56.3" |
| Görünürdeki Parlaklýk: | 8.748 |
| Uzaklýk: | 173.611 parsek |
| özdevim Sað Açýklýk: | 1.2 |
| özdevim Yükselim: | -14.2 |
| B-T magnitude: | 10.029 |
| V-T magnitude: | 8.854 |
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