UBC 339
0.66
UTI
0.52
CN
1.0
Cdens
1.0
CC3
0.4
Clit
1.0
Cdup
Stellar density (N50/rad)
11.5 [N/pc2]
- CN 0.52 Moderately populated
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.4 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 339 is a moderately populated, very dense 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.
Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 271.309 | -23.318 | 0.394 | 0.617 | -0.608 | -21.272 |
| Almeida et al. | 2025 | 271.309 | -23.307 | â | â | â | â |
| Hunt & Reffert | 2024 | 271.313 | -23.308 | 0.399 | 0.626 | -0.608 | -21.269 |
| Cavallo et al. | 2024 | 271.302 | -23.328 | 0.399 | â | â | â |
| Hunt & Reffert | 2023 | 271.313 | -23.308 | 0.399 | 0.626 | -0.608 | -21.269 |
| Dias et al. | 2021 | 271.309 | -23.307 | 0.392 | 0.572 | -0.557 | â |
| Cantat-Gaudin et al. | 2020 | 271.308 | -23.308 | 0.386 | 0.559 | -0.585 | â |
| Castro-Ginard et al. | 2020 | 271.311 | -23.308 | 0.387 | 0.571 | -0.594 | 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 | 2.34 | 2.34 | 2.07 | 661 | -0.348 | 366 | â | â |
| Almeida et al. | 2025 | 2.41 | 2.34 | â | 661 | â | 290 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 443(1) | â | â |
| Cavallo et al. | 2024 | 1.61 | 2.88 | â | 112 | -0.820 | â | â | â |
| Hunt & Reffert | 2023 | 2.34 | 2.54 | 2.07 | 171 | â | â | â | â |
| Dias et al. | 2021 | 2.41 | 2.34 | â | 661 | 0.123 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.34 | 1.65 | â | 1000 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit.