UBC 317
0.47
UTI
0.45
CN
0.38
Cdens
1.0
CC3
0.26
Clit
1.0
Cdup
Nm (P>50%)
45
Core radius and density
2.0 [pc], 1.9 [pc-2]
- CN 0.45 Poorly populated
- Cdens 0.38 Loose
- CC3 1.0 Very high quality
- Clit 0.26 Poorly 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 317 is a poorly populated, loose 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 near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 250.653 | -47.896 | 0.441 | -3.192 | -4.659 | -10.876 |
| Hu & Soubiran | 2025 | 250.649 | -47.904 | â | â | â | â |
| Almeida et al. | 2025 | 250.666 | -47.916 | â | â | â | â |
| Hunt & Reffert | 2024 | 250.648 | -47.886 | 0.453 | -3.21 | -4.671 | 5.379 |
| Cavallo et al. | 2024 | 250.649 | -47.904 | 0.451 | â | â | â |
| Hunt & Reffert | 2023 | 250.648 | -47.886 | 0.453 | -3.21 | -4.671 | 5.379 |
| Jadhav & Subramaniam | 2021 | 250.65 | -47.894 | â | â | â | â |
| Dias et al. | 2021 | 250.666 | -47.916 | 0.428 | -3.135 | -4.635 | -60.253 |
| Cantat-Gaudin et al. | 2020 | 250.65 | -47.894 | 0.427 | -3.15 | -4.632 | â |
| Castro-Ginard et al. | 2020 | 250.662 | -47.905 | 0.427 | -3.15 | -4.63 | 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 | 2.11 | 2.1 | 0.845 | 324 | 0.010 | 362 | â | 0 |
| Hu & Soubiran | 2025 | â | â | â | â | -0.370(5) | â | â | â |
| Almeida et al. | 2025 | 2.13 | 2.10 | â | 509 | â | 362 | â | â |
| Hunt & Reffert | 2024 | 2.07 | 2.24 | 0.85 | 199 | â | 445(1) | â | â |
| Cavallo et al. | 2024 | 1.69 | 1.97 | â | 933 | 0.010 | â | â | â |
| Hunt & Reffert | 2023 | 2.07 | 2.24 | 0.84 | 199 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 2.18 | 2.02 | â | 324 | â | 327 | â | 0(1) |
| Dias et al. | 2021 | 2.13 | 2.10 | â | 509 | 0.285 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.18 | 2.02 | â | 324 | â | â | â | â |
| Kounkel et al. | 2020 | 2.09 | 3.15 | â | 91 | 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: intermediate fit. Isochrone match: intermediate fit.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.94 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.94 (50th percentile).