UBC 91
0.01
UTI
0.76
CN
1.0
Cdens
1.0
CC3
0.31
Clit
0.02
Cdup
Radius (P>50% members)
3.4 [arcmin]
- CN 0.76 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.31 Poorly studied
- Cdup 0.02 Very likely duplicate
Overview
UBC 91 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 moderate extinction. It is catalogued as a massive, 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.
â ī¸ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.
Relatively close
Moderate 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 | 267.429 | -28.759 | 0.44 | -0.576 | -1.147 | -42.607 |
| Li et al. | 2025 | 267.433 | -28.761 | 0.42 | -0.587 | -1.126 | â |
| Almeida et al. | 2025 | 267.454 | -28.744 | â | â | â | â |
| Dias et al. | 2021 | 267.454 | -28.744 | 0.422 | -0.585 | -1.136 | â |
| Cantat-Gaudin et al. | 2020 | 267.433 | -28.761 | 0.42 | -0.587 | -1.126 | â |
| Castro-Ginard et al. | 2020 | 267.422 | -28.759 | 0.422 | -0.587 | -1.125 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 1.65 | 1.37 | â | 650 | 0.025 | â | â | â |
| Almeida et al. | 2025 | 2.06 | 1.88 | â | 63 | â | 1036 | â | â |
| Dias et al. | 2021 | 2.06 | 1.88 | â | 63 | 0.347 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.20 | 1.28 | â | 229 | â | â | â | â |
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit.