UBC 561
0.73
UTI
0.76
CN
1.0
Cdens
1.0
CC3
0.44
Clit
1.0
Cdup
Radius (P>50% members)
5.0 [arcmin]
- CN 0.76 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.44 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 561 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is poorly studied in the literature.
Note: This object shares a moderate percentage of members with a later reported entry. See table with shared members information.
Relatively close
Moderate extinction
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 261.213 | -37.488 | 0.595 | 0.129 | -3.952 | 78.055 |
| Almeida et al. | 2025 | 261.2 | -37.508 | â | â | â | â |
| Hunt & Reffert | 2024 | 261.203 | -37.49 | 0.591 | 0.127 | -3.943 | 78.062 |
| Cavallo et al. | 2024 | 261.212 | -37.495 | 0.591 | â | â | â |
| Hunt & Reffert | 2023 | 261.203 | -37.49 | 0.591 | 0.127 | -3.943 | 78.062 |
| Dias et al. | 2021 | 261.2 | -37.508 | 0.59 | 0.16 | -3.955 | â |
| Cantat-Gaudin et al. | 2020 | 261.208 | -37.497 | 0.6 | 0.166 | -3.931 | â |
| Castro-Ginard et al. | 2020 | 261.205 | -37.516 | 0.602 | 0.154 | -3.963 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Almeida et al. | 2025 | 1.62 | 2.80 | â | 90 | â | 453 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 797* | â | â |
| Cavallo et al. | 2024 | 1.64 | 2.98 | â | 195 | 0.380 | â | â | â |
| Hunt & Reffert | 2023 | 1.55 | 3.19 | 2.53 | 76 | â | â | â | â |
| Dias et al. | 2021 | 1.62 | 2.80 | â | 90 | 0.163 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.60 | 2.17 | â | 269 | 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: intermediate fit.
Cavallo et al. (2024)
Gold sample.