UBC 573
0.35
UTI
0.4
CN
0.2
Cdens
0.75
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
40
Core radius and density
2.5 [pc], 1.0 [pc-2]
- CN 0.4 Poorly populated
- Cdens 0.2 Very loose
- CC3 0.75 High quality
- Clit 0.19 Rarely 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 573 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by high 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 rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 274.994 | -9.464 | 0.568 | -0.133 | -4.48 | -26.803 |
| Li et al. | 2025 | 275.017 | -9.46 | 0.532 | -0.179 | -4.474 | â |
| Hunt & Reffert | 2024 | 275.029 | -9.477 | 0.575 | -0.151 | -4.48 | -13.362 |
| Cavallo et al. | 2024 | 275.015 | -9.452 | 0.569 | â | â | â |
| Hunt & Reffert | 2023 | 275.029 | -9.477 | 0.575 | -0.151 | -4.48 | -13.362 |
| Jadhav & Subramaniam | 2021 | 275.017 | -9.46 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 275.017 | -9.46 | 0.532 | -0.179 | -4.474 | â |
| Castro-Ginard et al. | 2020 | 275.012 | -9.444 | 0.532 | -0.182 | -4.484 | 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 | 1.63 | 3.1 | 2.35 | 186 | 0.072 | 298 | â | 0 |
| Li et al. | 2025 | 1.14 | 2.69 | â | 511 | -0.126 | â | â | â |
| Hunt & Reffert | 2024 | 1.63 | 3.28 | 2.35 | 51 | â | 466(1) | â | â |
| Cavallo et al. | 2024 | 1.56 | 3.10 | â | 186 | 0.270 | â | â | â |
| Hunt & Reffert | 2023 | 1.63 | 3.28 | 2.35 | 51 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 1.73 | 1.95 | â | 437 | â | 130 | â | 0(1) |
| Cantat-Gaudin et al. | 2020 | 1.73 | 1.95 | â | 437 | â | â | â | â |
| Kounkel et al. | 2020 | 1.79 | 3.11 | â | 65 | 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.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.38 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.38 (50th percentile).
Dias et al. (2021)
Dubious open cluster.