UBC 389
0.45
UTI
0.6
CN
0.39
Cdens
0.75
CC3
0.26
Clit
1.0
Cdup
Nm (P>50%)
71
Core radius and density
1.9 [pc], 2.0 [pc-2]
- CN 0.6 Moderately populated
- Cdens 0.39 Loose
- CC3 0.75 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 389 is a moderately populated, loose object of 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 | 338.374 | 58.386 | 0.428 | -3.363 | -3.418 | â |
| Li et al. | 2025 | 338.351 | 58.378 | 0.41 | -3.363 | -3.427 | â |
| Almeida et al. | 2025 | 338.342 | 58.373 | â | â | â | â |
| Hunt & Reffert | 2024 | 338.351 | 58.402 | 0.413 | -3.346 | -3.374 | -59.496 |
| Cavallo et al. | 2024 | 338.369 | 58.388 | 0.423 | â | â | â |
| Hunt & Reffert | 2023 | 338.351 | 58.402 | 0.413 | -3.346 | -3.374 | -59.496 |
| Almeida et al. | 2023 | 338.35 | 58.366 | â | â | â | â |
| Dias et al. | 2021 | 338.342 | 58.373 | 0.41 | -3.382 | -3.415 | â |
| Cantat-Gaudin et al. | 2020 | 338.351 | 58.378 | 0.41 | -3.363 | -3.427 | â |
| Castro-Ginard et al. | 2020 | 338.336 | 58.365 | 0.414 | -3.393 | -3.432 | 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 | 2.12 | 1.64 | 1.99 | 102 | -0.057 | 231 | 0.54 | â |
| Li et al. | 2025 | 1.77 | 1.45 | â | 40 | -0.138 | â | â | â |
| Almeida et al. | 2025 | 2.26 | 1.69 | â | 14 | â | 208 | â | â |
| Hunt & Reffert | 2024 | 2.26 | 1.51 | 1.99 | 172 | â | 308(1) | â | â |
| Cavallo et al. | 2024 | 1.76 | 1.68 | â | 129 | -0.350 | â | â | â |
| Hunt & Reffert | 2023 | 2.26 | 1.51 | 1.99 | 172 | â | â | â | â |
| Almeida et al. | 2023 | 2.09 | 1.64 | â | 117 | 0.024 | 231(1) | 0.54 | â |
| Dias et al. | 2021 | 2.26 | 1.69 | â | 14 | 0.101 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.12 | 1.21 | â | 102 | â | â | â | â |
| Kounkel et al. | 2020 | 2.02 | 2.04 | â | 46 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P603, along with UBC_391.
Almeida et al. (2025)
Mass determination: worst fit. Isochrone match: good fit.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.08 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.08 (50th percentile).