UBC 491
0.27
UTI
0.29
CN
0.62
Cdens
0.25
CC3
0.25
Clit
0.83
Cdup
Radius (P>50% members)
2.9 [arcmin]
- CN 0.29 Poorly populated
- Cdens 0.62 Moderately dense
- CC3 0.25 Low quality
- Clit 0.25 Poorly studied
- Cdup 0.83 Very likely unique
Overview
UBC 491 is a poorly populated, moderately dense object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It is poorly studied in the literature.
Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.
Distant
Moderate extinction
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 | 142.885 | -52.992 | 0.276 | -4.381 | 3.344 | 49.908 |
| Almeida et al. | 2025 | 142.871 | -53.018 | â | â | â | â |
| Dias et al. | 2021 | 142.871 | -53.018 | 0.22 | -4.372 | 3.32 | 10.714 |
| Cantat-Gaudin et al. | 2020 | 142.884 | -53.001 | 0.245 | -4.393 | 3.322 | â |
| Castro-Ginard et al. | 2020 | 142.887 | -53.006 | 0.246 | -4.378 | 3.317 | 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 | 3.87 | 2.40 | â | 7 | â | 677 | â | â |
| Dias et al. | 2021 | 3.87 | 2.40 | â | 7 | 0.031 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 3.75 | 2.01 | â | 182 | â | â | â | â |
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit.