UBC 538
0.70
UTI
0.77
CN
1.0
Cdens
1.0
CC3
0.38
Clit
1.0
Cdup
Radius (P>50% members)
3.8 [arcmin]
- CN 0.77 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.38 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 538 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 high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.
Relatively close
High extinction
Massive
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 | 242.6 | -52.335 | 0.336 | -2.923 | -4.281 | -25.401 |
| Hu & Soubiran | 2025 | 242.604 | -52.336 | â | â | â | â |
| Hunt & Reffert | 2024 | 242.593 | -52.335 | 0.337 | -2.934 | -4.282 | -26.722 |
| Cavallo et al. | 2024 | 242.604 | -52.336 | 0.338 | â | â | â |
| Hunt & Reffert | 2023 | 242.593 | -52.335 | 0.337 | -2.934 | -4.282 | -26.722 |
| Cantat-Gaudin et al. | 2020 | 242.592 | -52.339 | 0.322 | -2.895 | -4.245 | â |
| Castro-Ginard et al. | 2020 | 242.593 | -52.337 | 0.318 | -2.877 | -4.252 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | -0.480* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 2334* | â | â |
| Cavallo et al. | 2024 | 2.29 | 3.08 | â | 537 | 0.780 | â | â | â |
| Hunt & Reffert | 2023 | 2.66 | 3.83 | 2.49 | 93 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.77 | 2.67 | â | 631 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.