UBC 1031
0.68
UTI
0.76
CN
1.0
Cdens
1.0
CC3
0.31
Clit
1.0
Cdup
Radius (P>50% members)
3.1 [arcmin]
- CN 0.76 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.31 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 1031 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, old cluster (see Parameters). It is poorly studied in the literature.
Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.
Relatively close
High extinction
Massive
Near-solar metallicity
Old
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 280.229 | -9.667 | 0.394 | 0.738 | -3.702 | -24.165 |
| Hu & Soubiran | 2025 | 280.228 | -9.693 | â | â | â | â |
| Hunt & Reffert | 2024 | 280.226 | -9.665 | 0.388 | 0.721 | -3.666 | -17.378 |
| Cavallo et al. | 2024 | 280.228 | -9.693 | 0.391 | â | â | â |
| Hunt & Reffert | 2023 | 280.226 | -9.665 | 0.388 | 0.721 | -3.666 | -17.378 |
| Castro-Ginard et al. | 2022 | 280.22 | -9.67 | 0.4 | 0.74 | -3.72 | -25.02 |
đĄ Note: The UCC values are estimated from its identified members.
| Reference | Year | Dist [kpc] | Av [mag] | DAv [mag] | Age [Myr] | [Fe/H] [dex] | Mass [Msun] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | 0.000* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1080* | â | â |
| Cavallo et al. | 2024 | 2.27 | 3.64 | â | 1259 | -0.270 | â | â | â |
| Hunt & Reffert | 2023 | 2.35 | 3.54 | 2.17 | 478 | â | â | â | â |
| Castro-Ginard et al. | 2022 | 2.68 | 2.79 | â | 1239 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.