NGC 6561
Summary
NGC 6561 is a rich, very dense object of very high C3 quality. It is located at a relatively close distance from the Sun, near the mid-plane. It is well-studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Piskunov et al. (2008) | 272.617 | -16.736 | – | – | – | – |
| Kharchenko et al. (2012) | 272.613 | -16.73 | – | 0.4 | -1.5 | – |
| Cantat-Gaudin et al. (2018) | 272.659 | -16.74 | 0.655 | -0.002 | -0.754 | – |
| Soubiran et al. (2018) | 272.659 | -16.74 | – | – | – | 1.62 |
| Cantat-Gaudin et al. (2020) | 272.659 | -16.74 | 0.655 | -0.002 | -0.754 | – |
| Dias et al. (2021) | 272.681 | -16.741 | 0.659 | -0.006 | -0.748 | – |
| Hunt & Reffert (2023) | 272.645 | -16.731 | 0.671 | -0.003 | -0.794 | -35.442 |
| Cavallo et al. (2024) | 272.651 | -16.733 | 0.672 | – | – | – |
| Celli et al. (2024) | 272.659 | -16.74 | – | – | – | – |
| Hunt & Reffert (2024) | 272.645 | -16.731 | 0.671 | -0.003 | -0.794 | -35.442 |
| Almeida et al. (2025) | 272.681 | -16.741 | – | – | – | – |
| UCC | 272.65 | -16.733 | 0.673 | -0.009 | -0.78 | -11.67 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Piskunov et al. (2008) | E(B-V)=0.4, Dist=3400, logt=6.92, logMA=4.222 |
| Kharchenko et al. (2012) | e_bv=0.687, distance=2488, log_age=6.6 |
| Cantat-Gaudin et al. (2018) | dmode=1462.3 |
| Soubiran et al. (2018) | dmode=1462.3 |
| Cantat-Gaudin et al. (2020) | AVNN=0.95, DistPc=1480.0, AgeNN=7.27 |
| Dias et al. (2021) | Av=1.386, Dist=1461, logage=7.237, [Fe/H]=0.328 |
| Hunt & Reffert (2023) | AV50=1.209, diffAV50=1.245, MOD50=10.715, logAge50=7.148 |
| Cavallo et al. (2024) | AV50=1.55, dMod50=10.36, logAge50=7.25, [Fe/H]50=-0.42 |
| Celli et al. (2024) | Age=18.6, Mc=297.8 |
| Hunt & Reffert (2024) | MassJ=412.259, MassTot=412.259 |
| Almeida et al. (2025) | AV=1.386, Dist=1461, logAge=7.237, MassRk=266.1 |
Search coordinates in Bayestar19