UBC 521
0.75
UTI
0.72
CN
1.0
Cdens
1.0
CC3
0.5
Clit
1.0
Cdup
Stellar density (N50/rad)
7.3 [N/pc2]
- CN 0.72 Moderately populated
- Cdens 1.0 Very dense
- CC3 1.0 Very 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 521 is a moderately populated, very dense object of very 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, intermediate-age 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 | 187.568 | -64.146 | 0.314 | -8.472 | -0.831 | -4.554 |
| Hu & Soubiran | 2025 | 187.56 | -64.16 | â | â | â | â |
| Almeida et al. | 2025 | 187.522 | -64.159 | â | â | â | â |
| Hunt & Reffert | 2024 | 187.585 | -64.168 | 0.311 | -8.467 | -0.822 | 6.05 |
| Cavallo et al. | 2024 | 187.56 | -64.16 | 0.309 | â | â | â |
| Hunt & Reffert | 2023 | 187.585 | -64.168 | 0.311 | -8.467 | -0.822 | 6.05 |
| Almeida et al. | 2023 | 187.522 | -64.167 | â | â | â | â |
| Dias et al. | 2021 | 187.522 | -64.159 | 0.329 | -8.46 | -0.821 | â |
| Cantat-Gaudin et al. | 2020 | 187.576 | -64.16 | 0.322 | -8.453 | -0.851 | â |
| Castro-Ginard et al. | 2020 | 187.552 | -64.155 | 0.324 | -8.456 | -0.838 | 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 | 2.77 | 2.525 | 1.67 | 404 | 0.179 | 771 | 0.69 | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.130(5) | â | â | â |
| Almeida et al. | 2025 | 2.95 | 2.69 | â | 7 | â | 771 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1057(1) | â | â |
| Cavallo et al. | 2024 | 2.43 | 2.43 | â | 550 | 0.250 | â | â | â |
| Hunt & Reffert | 2023 | 2.95 | 2.62 | 1.67 | 258 | â | â | â | â |
| Almeida et al. | 2023 | 2.49 | 2.34 | â | 566 | 0.130 | 512(1) | 0.69 | â |
| Dias et al. | 2021 | 2.95 | 2.69 | â | 7 | 0.228 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.59 | 1.66 | â | 933 | 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.