UBC 338
0.73
UTI
0.78
CN
1.0
Cdens
1.0
CC3
0.44
Clit
1.0
Cdup
Radius (P>50% members)
6.4 [arcmin]
- CN 0.78 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.44 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 338 is a rich, very dense 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 massive, near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.
Relatively close
Moderate extinction
Massive
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 271.535 | -24.256 | 0.626 | 0.034 | -1.784 | -15.663 |
| Almeida et al. | 2025 | 271.545 | -24.244 | â | â | â | â |
| Hunt & Reffert | 2024 | 271.534 | -24.264 | 0.633 | 0.033 | -1.797 | -21.23 |
| Cavallo et al. | 2024 | 271.533 | -24.258 | 0.633 | â | â | â |
| Hunt & Reffert | 2023 | 271.534 | -24.264 | 0.633 | 0.033 | -1.797 | -21.23 |
| Dias et al. | 2021 | 271.545 | -24.244 | 0.621 | 0.031 | -1.744 | â |
| Cantat-Gaudin et al. | 2020 | 271.535 | -24.233 | 0.601 | 0.02 | -1.765 | â |
| Castro-Ginard et al. | 2020 | 271.532 | -24.231 | 0.602 | 0.013 | -1.773 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Almeida et al. | 2025 | 1.56 | 2.79 | â | 42 | â | 619 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1610* | â | â |
| Cavallo et al. | 2024 | 1.12 | 3.01 | â | 331 | 0.010 | â | â | â |
| Hunt & Reffert | 2023 | 1.48 | 3.25 | 2.84 | 39 | â | â | â | â |
| Dias et al. | 2021 | 1.56 | 2.79 | â | 42 | 0.305 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.60 | 2.14 | â | 234 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit. Silver sample.
Cavallo et al. (2024)
Gold sample.