UBC 540
0.40
UTI
0.48
CN
0.83
Cdens
1.0
CC3
0.25
Clit
0.71
Cdup
Radius (P>50% members)
3.9 [arcmin]
- CN 0.48 Poorly populated
- Cdens 0.83 Dense
- CC3 1.0 Very high quality
- Clit 0.25 Poorly studied
- Cdup 0.71 Likely unique
Overview
UBC 540 is a poorly populated, dense object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, very young cluster (see Parameters). It is poorly studied in the literature.
Note: This is likely a unique object, which shares a moderate percentage of members with at least one previously reported entry. See table with shared members information.
Relatively close
Moderate extinction
Massive
Near-solar metallicity
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 243.757 | -51.694 | 0.334 | -3.584 | -4.025 | -34.76 |
| Almeida et al. | 2025 | 243.847 | -51.706 | â | â | â | â |
| Dias et al. | 2021 | 243.847 | -51.706 | 0.295 | -3.54 | -4.011 | -36.461 |
| Cantat-Gaudin et al. | 2020 | 243.758 | -51.688 | 0.303 | -3.567 | -4.015 | â |
| Castro-Ginard et al. | 2020 | 243.789 | -51.7 | 0.302 | -3.554 | -4.012 | 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 | 2.97 | 2.43 | â | 11 | â | 1585 | â | â |
| Dias et al. | 2021 | 2.97 | 2.43 | â | 11 | 0.260 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.83 | 2.24 | â | 44 | â | â | â | â |
Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.