UBC 575
0.38
UTI
0.56
CN
0.22
Cdens
0.75
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
63
Core radius and density
1.5 [pc], 1.1 [pc-2]
- CN 0.56 Moderately populated
- Cdens 0.22 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 575 is a moderately populated, very loose 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 absorption parameter (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 | 290.924 | -5.087 | 0.943 | -0.279 | -5.169 | 7.67 |
| Li et al. | 2025 | 290.994 | -5.102 | 0.915 | -0.303 | -5.18 | â |
| Hunt & Reffert | 2024 | 290.934 | -5.093 | 0.941 | -0.274 | -5.186 | 6.28 |
| Cavallo et al. | 2024 | 290.781 | -5.099 | 0.941 | â | â | â |
| Hunt & Reffert | 2023 | 290.934 | -5.093 | 0.941 | -0.274 | -5.186 | 6.28 |
| Cantat-Gaudin et al. | 2020 | 290.994 | -5.102 | 0.915 | -0.303 | -5.18 | â |
| Castro-Ginard et al. | 2020 | 291.01 | -5.134 | 0.914 | -0.299 | -5.182 | 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 | 1.08 | 1.225 | 0.72 | 114 | 0.163 | 140 | â | â |
| Liu et al. | 2025 | 1.39 | 0.36 | â | 204 | â | â | â | â |
| Li et al. | 2025 | 1.13 | 1.41 | â | 48 | 0.065 | â | â | â |
| Hunt & Reffert | 2024 | 1.01 | 1.10 | 0.72 | 114 | â | 140(1) | â | â |
| Cavallo et al. | 2024 | 1.08 | 1.35 | â | 74 | 0.260 | â | â | â |
| Hunt & Reffert | 2023 | 1.01 | 1.10 | 0.72 | 114 | â | â | â | â |
| Kounkel et al. | 2020 | 1.08 | 1.55 | â | 117 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 378 along with UBC_356.
Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P75, along with UBC_356.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Dias et al. (2021)
Dubious open cluster.