UBC 303
0.79
UTI
0.75
CN
1.0
Cdens
1.0
CC3
0.6
Clit
1.0
Cdup
Radius (P>50% members)
4.3 [arcmin]
- CN 0.75 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.6 Moderately studied
- Cdup 1.0 Unique
Overview
UBC 303 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, above 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 metallicity parameter (see Parameters). It is moderately studied in the literature.
Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.
Relatively close
Moderate extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 221.842 | -56.253 | 0.559 | -4.902 | -3.84 | -44.499 |
| Li et al. | 2025 | 221.85 | -56.255 | 0.537 | -4.856 | -3.864 | â |
| Hu & Soubiran | 2025 | 221.856 | -56.245 | â | â | â | â |
| Almeida et al. | 2025 | 221.868 | -56.263 | â | â | â | â |
| Hunt & Reffert | 2024 | 221.834 | -56.263 | 0.553 | -4.897 | -3.834 | -41.769 |
| Cavallo et al. | 2024 | 221.856 | -56.245 | 0.555 | â | â | â |
| Hunt & Reffert | 2023 | 221.834 | -56.263 | 0.553 | -4.897 | -3.834 | -41.769 |
| Almeida et al. | 2023 | 221.902 | -56.254 | â | â | â | â |
| Dias et al. | 2021 | 221.868 | -56.263 | 0.536 | -4.844 | -3.866 | -49.116 |
| Cantat-Gaudin et al. | 2020 | 221.85 | -56.255 | 0.537 | -4.856 | -3.864 | â |
| Castro-Ginard et al. | 2020 | 221.871 | -56.259 | 0.537 | -4.842 | -3.873 | 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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 1.64 | 1.54 | â | 855 | -0.037 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.200* | â | â | â |
| Almeida et al. | 2025 | 1.67 | 1.64 | â | 746 | â | 324 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 649* | â | â |
| Cavallo et al. | 2024 | 1.63 | 1.56 | â | 741 | 0.210 | â | â | â |
| Hunt & Reffert | 2023 | 1.68 | 1.47 | 0.83 | 571 | â | â | â | â |
| Almeida et al. | 2023 | 1.71 | 1.71 | â | 675 | 0.114 | 419* | 0.59 | â |
| Dias et al. | 2021 | 1.67 | 1.64 | â | 746 | 0.105 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.73 | 1.39 | â | 708 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit. Silver sample.
Cavallo et al. (2024)
Gold sample.