UPK 99
Summary
UPK 99 is a sparse, very loose object of low C3 quality. It is located at a close distance from the Sun, below the mid-plane. It is well-studied in the literature.
Warning: contains less than 25 stars with P>0.5 estimated.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Sim et al. (2019) | 312.486 | 25.604 | – | 0.27 | -7.84 | – |
| Cantat-Gaudin et al. (2020) | 312.427 | 25.488 | 1.291 | 0.422 | -8.02 | – |
| Dias et al. (2021) | 312.423 | 25.505 | 1.276 | 0.351 | -7.897 | – |
| Hunt & Reffert (2023) | 312.479 | 25.561 | 1.258 | 0.225 | -7.911 | -11.93 |
| Cavallo et al. (2024) | 312.476 | 25.713 | 1.256 | – | – | – |
| Alfonso et al. (2024) | 312.567 | 25.552 | 1.174 | 0.38 | -7.667 | – |
| Almeida et al. (2025) | 312.423 | 25.505 | – | – | – | – |
| Hu & Soubiran (2025) | 312.476 | 25.713 | – | – | – | – |
| UCC | 312.459 | 25.556 | 1.249 | 0.31 | -7.976 | -15.464 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Sim et al. (2019) | d_pc=783, log(age)=8.1 |
| Cantat-Gaudin et al. (2020) | AVNN=0.28, DistPc=763.0, AgeNN=8.2 |
| Dias et al. (2021) | Av=0.513, Dist=771, logage=8.327, [Fe/H]=-0.1 |
| Tarricq et al. (2022) | Dist=747, logAgeNN=8.22 |
| Hunt & Reffert (2023) | AV50=0.227, diffAV50=0.396, MOD50=9.416, logAge50=8.335 |
| Cavallo et al. (2024) | AV50=0.06, dMod50=9.53, logAge50=8.91, [Fe/H]50=0.27 |
| Alfonso et al. (2024) | AV=0.27981, MOD=9.40996, logAge=8.12905, Z=-0.1000 |
| Almeida et al. (2025) | AV=0.513, Dist=771, logAge=8.327, MassRk=42.1 |
| Hu & Soubiran (2025) | MA22=-0.21, MA23f=0.0, MZ23=0.04, MK24=-0.02, MF24=0.05 |
Search coordinates in Bayestar19