UBC 312
0.63
UTI
0.75
CN
0.94
Cdens
1.0
CC3
0.23
Clit
1.0
Cdup
Nm (P>50%)
103
Core radius and density
1.1 [pc], 4.7 [pc-2]
- CN 0.75 Rich
- Cdens 0.94 Very dense
- CC3 1.0 Very high quality
- Clit 0.23 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
UBC 312 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 244.227 | -50.722 | 0.355 | -0.401 | -2.242 | -59.236 |
| Li et al. | 2025 | 244.235 | -50.721 | 0.33 | -0.345 | -2.242 | â |
| Hu & Soubiran | 2025 | 244.221 | -50.723 | â | â | â | â |
| Hunt & Reffert | 2024 | 244.24 | -50.723 | 0.37 | -0.431 | -2.244 | -59.714 |
| Cavallo et al. | 2024 | 244.221 | -50.723 | 0.371 | â | â | â |
| Hunt & Reffert | 2023 | 244.24 | -50.723 | 0.37 | -0.431 | -2.244 | -59.714 |
| Jadhav & Subramaniam | 2021 | 244.235 | -50.721 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 244.235 | -50.721 | 0.33 | -0.345 | -2.242 | â |
| Castro-Ginard et al. | 2020 | 244.212 | -50.725 | 0.332 | -0.356 | -2.244 | â |
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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 2.5 | 2.3 | 1.66 | 734 | -0.580 | 604 | â | 0 |
| Li et al. | 2025 | 2.22 | 2.19 | â | 734 | -0.035 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.580(5) | â | â | â |
| Hunt & Reffert | 2024 | 2.50 | 2.30 | 1.66 | 349 | â | 759(1) | â | â |
| Cavallo et al. | 2024 | 1.70 | 2.55 | â | 1072 | -0.580 | â | â | â |
| Hunt & Reffert | 2023 | 2.50 | 2.30 | 1.66 | 348 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 2.51 | 1.79 | â | 794 | â | 448 | â | 0(1) |
| Cantat-Gaudin et al. | 2020 | 2.51 | 1.79 | â | 794 | â | â | â | â |
| Kounkel et al. | 2020 | 2.52 | 3.14 | â | 155 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Part of multiple system G237, along with CWNU_1648, Ruprecht_176, Theia_2096 and UBC_1547.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.43 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.43 (50th percentile).