NGC 6639
(OCL 57; MWSC 2934)
Summary
NGC 6639 is a sparse, very loose object of intermediate C3 quality. It is located at a large distance from the Sun, below the mid-plane. It is poorly studied in the literature, with no articles listed in the last 6 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 |
|---|---|---|---|---|---|---|
| Piskunov et al. (2008) | 277.734 | -13.155 | – | – | – | – |
| Kharchenko et al. (2012) | 277.74 | -13.14 | – | 1.99 | -1.8 | – |
| Bica et al. (2019) | 277.716 | -13.168 | – | – | – | – |
| UCC | 277.725 | -13.158 | 0.109 | -3.82 | -6.875 | 120.635 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Piskunov et al. (2008) | E(B-V)=0.2, Dist=700, logt=8.86, logMA=1.791 |
| Kharchenko et al. (2012) | e_bv=0.25, distance=765, log_age=8.93 |
Search coordinates in Bayestar19