UBC 520
0.68
UTI
0.44
CN
1.0
Cdens
0.75
CC3
0.6
Clit
1.0
Cdup
Radius (P>50% members)
3.6 [arcmin]
- CN 0.44 Poorly populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.6 Moderately studied
- Cdup 1.0 Unique
Overview
UBC 520 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a relatively close 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.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
Relatively close
Moderate extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 186.086 | -66.672 | 0.513 | -4.909 | -0.074 | â |
| Li et al. | 2025 | 186.083 | -66.672 | 0.492 | -4.872 | -0.095 | â |
| Hu & Soubiran | 2025 | 186.076 | -66.674 | â | â | â | â |
| Almeida et al. | 2025 | 186.112 | -66.672 | â | â | â | â |
| Hunt & Reffert | 2024 | 186.073 | -66.674 | 0.51 | -4.916 | -0.08 | â |
| Cavallo et al. | 2024 | 186.076 | -66.674 | 0.509 | â | â | â |
| Hunt & Reffert | 2023 | 186.073 | -66.674 | 0.51 | -4.916 | -0.08 | â |
| Almeida et al. | 2023 | 186.089 | -66.665 | â | â | â | â |
| Dias et al. | 2021 | 186.112 | -66.672 | 0.481 | -4.87 | -0.102 | â |
| Cantat-Gaudin et al. | 2020 | 186.083 | -66.672 | 0.492 | -4.872 | -0.095 | â |
| Castro-Ginard et al. | 2020 | 186.138 | -66.672 | 0.488 | -4.89 | -0.099 | 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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 1.65 | 1.27 | â | 854 | -0.029 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.160* | â | â | â |
| Almeida et al. | 2025 | 1.97 | 1.61 | â | 288 | â | 175 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 293* | â | â |
| Cavallo et al. | 2024 | 1.97 | 1.02 | â | 1000 | 0.530 | â | â | â |
| Hunt & Reffert | 2023 | 1.85 | 1.24 | 0.49 | 427 | â | â | â | â |
| Almeida et al. | 2023 | 1.87 | 1.57 | â | 562 | 0.016 | 251* | 0.46 | â |
| Dias et al. | 2021 | 1.97 | 1.61 | â | 288 | 0.300 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.86 | 1.23 | â | 794 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit. Silver sample.
Cavallo et al. (2024)
Gold sample.