OC 0640
Summary
OC 0640 is a moderately populated, very dense object of very high C3 quality. It is located at a moderate distance from the Sun, near the mid-plane. It was recently reported in the literature.
Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry, and a moderate percentage with at least one entry reported in the same catalogue.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Hao et al. (2022) | 240.415 | -52.116 | 0.425 | -4.921 | -5.422 | – |
| Hunt & Reffert (2023) | 240.416 | -52.111 | 0.439 | -4.907 | -5.418 | -35.933 |
| Cavallo et al. (2024) | 240.415 | -52.126 | 0.44 | – | – | – |
| Hunt & Reffert (2024) | 240.416 | -52.111 | 0.439 | -4.907 | -5.418 | -35.933 |
| Hu & Soubiran (2025) | 240.416 | -52.126 | – | – | – | – |
| UCC | 240.407 | -52.111 | 0.417 | -4.93 | -5.416 | -39.316 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Hao et al. (2022) | AG=3.82, age=9.1, Z=0.028 |
| Hunt & Reffert (2023) | AV50=3.753, diffAV50=2.396, MOD50=11.65, logAge50=8.846 |
| Cavallo et al. (2024) | AV50=3.59, dMod50=11.17, logAge50=9.23, [Fe/H]50=-0.25 |
| Hunt & Reffert (2024) | MassJ=1934.29, MassTot=1934.29 |
| Hu & Soubiran (2025) | MA22=-0.27, MA23f=-0.12, MA23g=0.13, MZ23=0.13, MK24=-0.07, MF24=0.06 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| FoF 434 | 100.0 | 240.42 | -52.12 | 0.43 | -4.92 | -5.42 | -37.26 | 0.56 |
| OC 0641 | 39.0 | 240.43 | -52.11 | 0.46 | -4.96 | -5.41 | -40.22 | 0.0 |