UBC 97
0.50
UTI
0.7
CN
0.54
Cdens
0.75
CC3
0.26
Clit
1.0
Cdup
Nm (P>50%)
91
Core radius and density
1.6 [pc], 2.7 [pc-2]
- CN 0.7 Moderately populated
- Cdens 0.54 Moderately dense
- CC3 0.75 High quality
- Clit 0.26 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 97 is a moderately populated, moderately dense object of 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 shares a large percentage of members with 2 later reported entries. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 274.787 | -15.751 | 0.721 | -0.858 | -1.195 | -17.68 |
| Li et al. | 2025 | 274.782 | -15.722 | 0.736 | -0.872 | -1.161 | â |
| Almeida et al. | 2025 | 274.785 | -15.743 | â | â | â | â |
| Hunt & Reffert | 2024 | 274.814 | -15.734 | 0.718 | -0.835 | -1.212 | -18.173 |
| Cavallo et al. | 2024 | 274.797 | -15.748 | 0.718 | â | â | â |
| Hunt & Reffert | 2023 | 274.814 | -15.734 | 0.718 | -0.835 | -1.212 | -18.173 |
| Dias et al. | 2021 | 274.785 | -15.743 | 0.728 | -0.873 | -1.15 | â |
| Cantat-Gaudin et al. | 2020 | 274.782 | -15.722 | 0.736 | -0.872 | -1.161 | â |
| Castro-Ginard et al. | 2020 | 274.779 | -15.726 | 0.733 | -0.871 | -1.146 | 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 | 1.31 | 1.375 | 0.34 | 100 | -0.019 | 375 | â | â |
| Li et al. | 2025 | 1.28 | 0.94 | â | 374 | 0.246 | â | â | â |
| Almeida et al. | 2025 | 1.35 | 1.52 | â | 51 | â | 285 | â | â |
| Hunt & Reffert | 2024 | 1.31 | 1.23 | 0.34 | 100 | â | 465(1) | â | â |
| Cavallo et al. | 2024 | 1.05 | 1.89 | â | 162 | -0.750 | â | â | â |
| Hunt & Reffert | 2023 | 1.31 | 1.23 | 0.34 | 100 | â | â | â | â |
| Tarricq et al. | 2022 | 1.32 | â | â | 138 | â | â | â | â |
| Dias et al. | 2021 | 1.35 | 1.52 | â | 51 | -0.019 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.37 | 1.16 | â | 120 | â | â | â | â |
| Kounkel et al. | 2020 | 1.26 | 1.71 | â | 71 | 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 P450, along with HSC_194.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit. Silver sample.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).