UPK 18
Summary
UPK 18 is a poorly populated, very dense object of intermediate C3 quality. It is located at a close distance from the Sun, near the mid-plane. It is well-studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Sim et al. (2019) | 280.771 | -15.304 | – | 3.08 | 0.87 | – |
| Cantat-Gaudin et al. (2020) | 280.763 | -15.325 | 1.28 | 3.112 | 0.98 | – |
| Dias et al. (2021) | 280.759 | -15.308 | 1.266 | 3.075 | 0.92 | – |
| Hunt & Reffert (2023) | 280.771 | -15.317 | 1.307 | 3.002 | 0.839 | -16.58 |
| Cavallo et al. (2024) | 280.754 | -15.328 | 1.301 | – | – | – |
| Hunt & Reffert (2024) | 280.771 | -15.317 | 1.307 | 3.002 | 0.839 | -16.58 |
| Alfonso et al. (2024) | 280.698 | -15.283 | 1.242 | 2.972 | 0.792 | – |
| Almeida et al. (2025) | 280.759 | -15.308 | – | – | – | – |
| UCC | 280.784 | -15.325 | 1.291 | 3.062 | 0.866 | -20.594 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Sim et al. (2019) | d_pc=753, log(age)=8.45 |
| Cantat-Gaudin et al. (2020) | AVNN=1.04, DistPc=782.0, AgeNN=8.86 |
| Dias et al. (2021) | Av=1.412, Dist=814, logage=8.187, [Fe/H]=0.032 |
| Tarricq et al. (2022) | Dist=764, logAgeNN=8.86 |
| Hunt & Reffert (2023) | AV50=1.106, diffAV50=0.826, MOD50=9.343, logAge50=8.544 |
| Cavallo et al. (2024) | AV50=1.11, dMod50=9.38, logAge50=8.58, [Fe/H]50=-0.31 |
| Hunt & Reffert (2024) | MassJ=109.370, MassTot=132.628 |
| Alfonso et al. (2024) | AV=1.03976, MOD=9.4701, logAge=7.87629, Z=0.03191 |
| Almeida et al. (2025) | AV=1.412, Dist=814, logAge=8.187, MassRk=136.9 |
Search coordinates in Bayestar19