NGC 657
Summary
NGC 657 is a sparse, very loose object of low C3 quality. It is located at a moderate distance from the Sun, below the mid-plane. It is poorly studied in the literature, with no articles listed in the last 8 years.
Warning: contains less than 25 stars with P>0.5 estimated.
Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicates that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 25.837 | 55.836 | – | 1.14 | -3.95 | – |
| Kharchenko et al. (2012) | 25.849 | 55.84 | – | -1.07 | -1.53 | – |
| Loktin & Popova (2017) | 25.845 | 55.837 | – | -0.366 | -0.859 | – |
| UCC | 25.796 | 55.905 | 0.336 | -1.998 | 0.324 | -85.774 |
Estimated members
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Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.34, Dist=1372.0, Age=9.2 |
| Kharchenko et al. (2012) | e_bv=0.521, distance=1934, log_age=9.0 |
| Loktin & Popova (2017) | E(B-V)=0.391, Dist=2387, logt=8.9 |
Search coordinates in Bayestar19