UBC 670
0.34
UTI
0.3
CN
0.5
Cdens
0.5
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
30
Core radius and density
0.9 [pc], 2.5 [pc-2]
- CN 0.3 Poorly populated
- Cdens 0.5 Moderately dense
- CC3 0.5 Intermediate quality
- Clit 0.19 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
UBC 670 is a poorly populated, moderately 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, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 253.098 | -44.418 | 0.551 | 0.22 | -1.109 | â |
| Almeida et al. | 2025 | 253.077 | -44.41 | â | â | â | â |
| Hunt & Reffert | 2024 | 253.107 | -44.423 | 0.562 | 0.181 | -1.102 | â |
| Cavallo et al. | 2024 | 253.077 | -44.425 | 0.559 | â | â | â |
| Hunt & Reffert | 2023 | 253.107 | -44.423 | 0.562 | 0.181 | -1.102 | â |
| Dias et al. | 2021 | 253.077 | -44.41 | 0.512 | 0.262 | -1.05 | â |
| Cantat-Gaudin et al. | 2020 | 253.093 | -44.432 | 0.497 | 0.293 | -1.092 | â |
| Castro-Ginard et al. | 2020 | 253.071 | -44.422 | 0.496 | 0.282 | -1.104 | 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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 1.765 | 1.87 | 0.63 | 131 | 0.276 | 218 | â | â |
| Almeida et al. | 2025 | 1.99 | 1.99 | â | 61 | â | 165 | â | â |
| Hunt & Reffert | 2024 | 1.68 | 1.53 | 0.63 | 131 | â | 270(1) | â | â |
| Cavallo et al. | 2024 | 1.54 | 1.75 | â | 457 | 0.120 | â | â | â |
| Hunt & Reffert | 2023 | 1.68 | 1.52 | 0.63 | 131 | â | â | â | â |
| Dias et al. | 2021 | 1.99 | 1.99 | â | 61 | 0.431 | â | â | â |
| Kounkel et al. | 2020 | 1.85 | 2.16 | â | 229 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).