UBC 641
0.32
UTI
0.0
CN
0.09
Cdens
0.75
CC3
0.38
Clit
1.0
Cdup
Radius (P>50% members)
6.4 [arcmin]
- CN 0.0 Sparse
- Cdens 0.09 Very loose
- CC3 0.75 High quality
- Clit 0.38 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 641 is a sparse, very loose object of high C3 quality. Its parallax locates it at a moderate distance, below 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.
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 | 116.015 | -31.13 | 0.268 | -2.296 | 3.252 | â |
| Li et al. | 2025 | 116.01 | -31.135 | 0.248 | -2.331 | 3.232 | â |
| Almeida et al. | 2025 | 115.997 | -31.095 | â | â | â | â |
| Almeida et al. | 2023 | 115.998 | -31.083 | â | â | â | â |
| Dias et al. | 2021 | 115.997 | -31.095 | 0.245 | -2.298 | 3.218 | â |
| Cantat-Gaudin et al. | 2020 | 116.01 | -31.135 | 0.248 | -2.331 | 3.232 | â |
| Castro-Ginard et al. | 2020 | 116.006 | -31.114 | 0.249 | -2.311 | 3.23 | 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 | 3.58 | 1.15 | â | 44 | 0.042 | â | â | â |
| Almeida et al. | 2025 | 3.90 | 1.21 | â | 10 | â | 389 | â | â |
| Almeida et al. | 2023 | 3.21 | 1.26 | â | 24 | -0.124 | 661* | 0.65 | â |
| Dias et al. | 2021 | 3.90 | 1.21 | â | 10 | -0.002 | 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.