UBC 665
0.50
UTI
0.0
CN
1.0
Cdens
0.62
CC3
0.44
Clit
1.0
Cdup
Radius (P>50% members)
3.1 [arcmin]
- CN 0.0 Sparse
- Cdens 1.0 Very dense
- CC3 0.62 Intermediate quality
- Clit 0.44 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 665 is a sparse, very dense object of intermediate 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, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.
Relatively close
Moderate extinction
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 242.167 | -51.408 | 0.502 | -2.263 | -4.21 | â |
| Almeida et al. | 2025 | 242.168 | -51.426 | â | â | â | â |
| Hunt & Reffert | 2024 | 242.18 | -51.426 | 0.502 | -2.249 | -4.182 | â |
| Cavallo et al. | 2024 | 242.209 | -51.401 | 0.504 | â | â | â |
| Hunt & Reffert | 2023 | 242.18 | -51.426 | 0.502 | -2.249 | -4.182 | â |
| Dias et al. | 2021 | 242.168 | -51.426 | 0.465 | -2.235 | -4.204 | â |
| Cantat-Gaudin et al. | 2020 | 242.167 | -51.407 | 0.48 | -2.216 | -4.224 | â |
| Castro-Ginard et al. | 2020 | 242.173 | -51.41 | 0.475 | -2.209 | -4.231 | 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 | 2.10 | 2.86 | â | 11 | â | 225 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 346* | â | â |
| Cavallo et al. | 2024 | 1.76 | 2.58 | â | 209 | 0.400 | â | â | â |
| Hunt & Reffert | 2023 | 1.93 | 3.08 | 1.86 | 55 | â | â | â | â |
| Dias et al. | 2021 | 2.10 | 2.86 | â | 11 | 0.183 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.00 | 2.47 | â | 166 | 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.