UBC 542
0.73
UTI
0.75
CN
1.0
Cdens
1.0
CC3
0.44
Clit
1.0
Cdup
Radius (P>50% members)
4.5 [arcmin]
- CN 0.75 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.44 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 542 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 near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.
Note: This object shares a moderate 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 | 244.547 | -49.491 | 0.579 | -0.437 | -1.34 | -38.497 |
| Almeida et al. | 2025 | 244.539 | -49.5 | â | â | â | â |
| Hunt & Reffert | 2024 | 244.567 | -49.49 | 0.591 | -0.452 | -1.364 | -35.314 |
| Cavallo et al. | 2024 | 244.541 | -49.51 | 0.588 | â | â | â |
| Hunt & Reffert | 2023 | 244.567 | -49.49 | 0.591 | -0.452 | -1.364 | -35.314 |
| Dias et al. | 2021 | 244.539 | -49.5 | 0.551 | -0.374 | -1.323 | â |
| Cantat-Gaudin et al. | 2020 | 244.575 | -49.487 | 0.554 | -0.38 | -1.326 | â |
| Castro-Ginard et al. | 2020 | 244.561 | -49.497 | 0.552 | -0.373 | -1.323 | 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 | 1.79 | 2.46 | â | 18 | â | 542 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 540* | â | â |
| Cavallo et al. | 2024 | 1.12 | 2.18 | â | 490 | -0.510 | â | â | â |
| Hunt & Reffert | 2023 | 1.62 | 2.07 | 2.32 | 127 | â | â | â | â |
| Dias et al. | 2021 | 1.79 | 2.46 | â | 18 | 0.236 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.78 | 1.84 | â | 126 | 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.
Cavallo et al. (2024)
Gold sample.