UBC 108
0.57
UTI
0.75
CN
0.37
Cdens
1.0
CC3
0.35
Clit
1.0
Cdup
Nm (P>50%)
112
Core radius and density
3.3 [pc], 1.8 [pc-2]
- CN 0.75 Rich
- Cdens 0.37 Loose
- CC3 1.0 Very high quality
- Clit 0.35 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 108 is a rich, loose object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (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 | 281.602 | -5.17 | 0.633 | -2.895 | -3.688 | 15.534 |
| Li et al. | 2025 | 281.611 | -5.181 | 0.627 | -2.94 | -3.648 | â |
| Hu & Soubiran | 2025 | 281.616 | -5.187 | â | â | â | â |
| Yang et al. | 2025 | 281.597 | -5.18 | â | â | â | â |
| Almeida et al. | 2025 | 281.622 | -5.183 | â | â | â | â |
| Hunt & Reffert | 2024 | 281.597 | -5.18 | 0.623 | -2.868 | -3.652 | 15.324 |
| Cavallo et al. | 2024 | 281.616 | -5.187 | 0.626 | â | â | â |
| Hunt & Reffert | 2023 | 281.597 | -5.18 | 0.623 | -2.868 | -3.652 | 15.324 |
| Tarricq et al. | 2022 | 281.654 | -5.148 | 0.624 | -2.888 | -3.699 | â |
| Jadhav & Subramaniam | 2021 | 281.611 | -5.181 | â | â | â | â |
| Dias et al. | 2021 | 281.622 | -5.183 | 0.625 | -2.939 | -3.652 | 16.328 |
| Cantat-Gaudin et al. | 2020 | 281.611 | -5.181 | 0.627 | -2.94 | -3.648 | â |
| Castro-Ginard et al. | 2020 | 281.629 | -5.196 | 0.621 | -2.944 | -3.668 | 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 | 1.52 | 2.25 | 1.24 | 566 | -0.050 | 343 | â | 1 |
| Li et al. | 2025 | 1.22 | 2.04 | â | 1169 | -0.148 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.050(5) | â | â | â |
| Yang et al. | 2025 | â | â | â | 331 | 0.160(3) | â | â | â |
| Almeida et al. | 2025 | 1.52 | 2.41 | â | 566 | â | 273 | â | â |
| Hunt & Reffert | 2024 | 1.52 | 2.25 | 1.24 | 330 | â | 654(1) | â | â |
| Cavallo et al. | 2024 | 1.24 | 2.78 | â | 525 | -0.380 | â | â | â |
| Hunt & Reffert | 2023 | 1.52 | 2.25 | 1.24 | 330 | â | â | â | â |
| Tarricq et al. | 2022 | 1.50 | â | â | 871 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 1.58 | 1.92 | â | 741 | â | 343 | â | 1(1) |
| Dias et al. | 2021 | 1.52 | 2.41 | â | 566 | 0.032 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.58 | 1.92 | â | 741 | â | â | â | â |
| Kounkel et al. | 2020 | 1.44 | 2.56 | â | 98 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P251, along with FoF_2117.
Almeida et al. (2025)
Mass determination: worst 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).