UBC 397
0.62
UTI
0.6
CN
0.72
Cdens
0.75
CC3
0.5
Clit
1.0
Cdup
Nm (P>50%)
71
Core radius and density
1.5 [pc], 3.6 [pc-2]
- CN 0.6 Moderately populated
- Cdens 0.72 Moderately dense
- CC3 0.75 High quality
- Clit 0.5 Moderately 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 397 is a moderately populated, moderately dense 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, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is moderately studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 347.713 | 58.63 | 0.272 | -3.474 | -2.701 | â |
| Li et al. | 2026 | 347.71 | 58.63 | â | â | â | â |
| Almeida et al. | 2025 | 347.732 | 58.611 | â | â | â | â |
| Hunt & Reffert | 2024 | 347.72 | 58.634 | 0.269 | -3.469 | -2.711 | â |
| Cavallo et al. | 2024 | 347.707 | 58.619 | 0.271 | â | â | â |
| Hunt & Reffert | 2023 | 347.72 | 58.634 | 0.269 | -3.469 | -2.711 | â |
| Almeida et al. | 2023 | 347.725 | 58.608 | â | â | â | â |
| Dias et al. | 2021 | 347.732 | 58.611 | 0.252 | -3.503 | -2.655 | â |
| Cantat-Gaudin et al. | 2020 | 347.721 | 58.627 | 0.258 | -3.512 | -2.675 | â |
| Castro-Ginard et al. | 2020 | 347.745 | 58.613 | 0.258 | -3.52 | -2.687 | 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 | 3.325 | 2.66 | 1.66 | 25 | -0.107 | 693 | 0.58 | â |
| Almeida et al. | 2025 | 3.43 | 2.70 | â | 6 | â | 500 | â | â |
| Hunt & Reffert | 2024 | 3.22 | 2.62 | 1.66 | 33 | â | 693(1) | â | â |
| Cavallo et al. | 2024 | 3.09 | 2.63 | â | 129 | 0.420 | â | â | â |
| Hunt & Reffert | 2023 | 3.22 | 2.62 | 1.66 | 33 | â | â | â | â |
| Almeida et al. | 2023 | 3.16 | 2.69 | â | 12 | -0.107 | 735(1) | 0.58 | â |
| Dias et al. | 2021 | 3.43 | 2.70 | â | 6 | -0.141 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 3.56 | 2.44 | â | 69 | â | â | â | â |
| Kounkel et al. | 2020 | 3.79 | 2.81 | â | 17 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Li et al. (2026)
Tidal & Core radii: r_t=34+/-56.7 [pc], r_c=0.44+/-0.0 [pc]; stars within r_t: N~59
Palma et al. (2025)
Classified as optical pair P107, along with CWNU_1997.
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit. Silver sample.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.98 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).