UPK 540
(OCSN 313)
Summary
UPK 540 is a rich, moderately dense object of very high C3 quality. It is located at a very close distance from the Sun, below the mid-plane. It is well-studied in the literature.
This object shares a very small percentage of members with a later reported entry.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Sim et al. (2019) | 114.693 | -58.54 | – | -4.82 | 7.66 | – |
| Cantat-Gaudin et al. (2020) | 114.567 | -58.609 | 2.688 | -4.827 | 7.67 | – |
| Dias et al. (2021) | 114.535 | -58.435 | 2.663 | -4.815 | 7.661 | 14.456 |
| He et al. (2022) | 114.801 | -58.752 | 2.743 | -4.769 | 7.759 | – |
| Qin et al. (2023) | 115.07 | -58.65 | 2.71 | -4.8 | 7.71 | 6.71 |
| Hunt & Reffert (2023) | 115.516 | -58.662 | 2.718 | -4.841 | 7.689 | 7.935 |
| Cavallo et al. (2024) | 114.839 | -58.81 | 2.719 | – | – | – |
| Alfonso et al. (2024) | 114.649 | -58.711 | 2.71 | -4.81 | 7.77 | – |
| Almeida et al. (2025) | 114.535 | -58.435 | – | – | – | – |
| UCC | 114.668 | -58.722 | 2.727 | -4.857 | 7.754 | 6.804 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Sim et al. (2019) | d_pc=372, log(age)=7.5 |
| Cantat-Gaudin et al. (2020) | AVNN=0.32, DistPc=360.0, AgeNN=7.57 |
| Dias et al. (2021) | Av=0.448, Dist=365, logage=7.513, [Fe/H]=-0.008 |
| He et al. (2022) | A0=0.5, logAge=7.45 |
| Qin et al. (2023) | E(B-V)=0.14, m-M=8.15, logt=7.45 |
| Hunt & Reffert (2023) | AV50=0.249, diffAV50=0.473, MOD50=7.801, logAge50=7.302 |
| Cavallo et al. (2024) | AV50=0.68, dMod50=7.91, logAge50=6.97, [Fe/H]50=-0.25 |
| Alfonso et al. (2024) | AV=0.31990, MOD=7.77990, logAge=7.48664, Z=-0.0078 |
| Almeida et al. (2025) | AV=0.448, Dist=365, logAge=7.513, MassRk=55.1 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| HSC 2216 | 1.0 | 113.89 | -60.6 | 3.51 | -4.64 | 9.13 | 20.53 | 0.11 |