Membership and photometry of the open cluster IC 4756.
Abstract
Probabilities of membership, based on relative proper motions, for 464 stars in the field of IC 4756 are given. The cluster proper motion dispersion (m.e.) of 0.09 sec of arc yields 173 probable members. Photographic UBV magnitudes of 471 stars in the field are presented. The color excess of IC 4756 is E(B-V) equal to 0.19 min; the apparent distance modulus equals 8.5 min, corresponding to the true distance of 400 pc. The membership probabilities of 6 blue stragglers and of the supergiant HD 172365 (F9 Ib) are discussed.
- Publication:
-
Astronomy and Astrophysics Supplement Series
- Pub Date:
- February 1975
- Bibcode:
- 1975A&AS...19..211H
- Keywords:
-
- Open Clusters;
- Stellar Motions;
- Stellar Spectrophotometry;
- Ubv Spectra;
- Astronomical Coordinates;
- Astronomical Models;
- Astronomical Photometry;
- Electrophotometry;
- Light Curve;
- Milky Way Galaxy;
- Star Distribution;
- Stellar Luminosity;
- Supergiant Stars;
- Tables (Data);
- Velocity Distribution;
- Astronomy