UBC 252
0.55
UTI
0.8
CN
0.3
Cdens
1.0
CC3
0.32
Clit
1.0
Cdup
Nm (P>50%)
232
Core radius and density
3.6 [pc], 1.5 [pc-2]
- CN 0.8 Rich
- Cdens 0.3 Loose
- CC3 1.0 Very high quality
- Clit 0.32 Poorly 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 252 is a rich, loose object of very high C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.
Note: This object contains blue stragglers according to at least one source.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 139.163 | -54.148 | 0.185 | -3.588 | 2.698 | 22.088 |
| Li et al. | 2025 | 139.157 | -54.145 | 0.172 | -3.59 | 2.671 | â |
| Hu & Soubiran | 2025 | 139.16 | -54.145 | â | â | â | â |
| Carrasco-Varela et al. | 2025 | 139.297 | -54.243 | â | â | â | â |
| Almeida et al. | 2025 | 139.196 | -54.15 | â | â | â | â |
| Hunt & Reffert | 2024 | 139.16 | -54.128 | 0.187 | -3.589 | 2.724 | 22.543 |
| Cavallo et al. | 2024 | 139.16 | -54.146 | 0.187 | â | â | â |
| Hunt & Reffert | 2023 | 139.16 | -54.128 | 0.187 | -3.589 | 2.724 | 22.543 |
| Jadhav & Subramaniam | 2021 | 139.157 | -54.145 | â | â | â | â |
| Dias et al. | 2021 | 139.196 | -54.15 | 0.169 | -3.588 | 2.706 | 19.511 |
| Cantat-Gaudin et al. | 2020 | 139.157 | -54.145 | 0.172 | -3.59 | 2.671 | â |
| Castro-Ginard et al. | 2020 | 139.168 | -54.143 | 0.175 | -3.603 | 2.675 | 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 | 4.51 | 1.31 | 0.62 | 1062 | -0.220 | 2713 | â | 1 |
| Li et al. | 2025 | 4.85 | 1.31 | â | 1051 | -0.152 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.220(5) | â | â | â |
| Carrasco-Varela et al. | 2025 | 3.95 | 1.44 | â | 1183 | -0.350 | â | â | 1(1) |
| Almeida et al. | 2025 | 3.95 | 1.44 | â | 1186 | â | 2863 | â | â |
| Hunt & Reffert | 2024 | 4.84 | 1.27 | 0.62 | 1062 | â | 1840(1) | â | â |
| Cavallo et al. | 2024 | 3.40 | 1.31 | â | 1514 | -0.040 | â | â | â |
| Hunt & Reffert | 2023 | 4.84 | 1.27 | 0.62 | 1062 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 4.51 | 1.00 | â | 977 | â | 2713 | â | 1(1) |
| Dias et al. | 2021 | 3.95 | 1.44 | â | 1186 | -0.223 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 4.51 | 1.00 | â | 977 | â | â | â | â |
| Kounkel et al. | 2020 | 5.50 | 1.69 | â | 813 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).