UBC 559
0.55
UTI
0.48
CN
0.27
Cdens
1.0
CC3
0.5
Clit
1.0
Cdup
Radius (P>50% members)
8.1 [arcmin]
- CN 0.48 Poorly populated
- Cdens 0.27 Loose
- CC3 1.0 Very high quality
- Clit 0.5 Moderately studied
- Cdup 1.0 Unique
Overview
UBC 559 is a poorly populated, loose object of very high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, very young cluster (see Parameters). It is moderately studied in the literature.
Note: This object shares a small percentage of members with a later reported entry. See table with shared members information.
Relatively close
High extinction
Massive
Near-solar metallicity
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 259.151 | -39.652 | 0.395 | -0.472 | -1.419 | -26.565 |
| Almeida et al. | 2025 | 259.104 | -39.657 | â | â | â | â |
| Hunt & Reffert | 2024 | 259.111 | -39.747 | 0.405 | -0.523 | -1.437 | 10.155 |
| Celli et al. | 2024 | 259.123 | -39.699 | â | â | â | â |
| Cavallo et al. | 2024 | 259.141 | -39.665 | 0.405 | â | â | â |
| Hunt & Reffert | 2023 | 259.111 | -39.747 | 0.405 | -0.523 | -1.437 | 10.155 |
| Dias et al. | 2021 | 259.104 | -39.657 | 0.392 | -0.501 | -1.405 | â |
| Cantat-Gaudin et al. | 2020 | 259.123 | -39.699 | 0.386 | -0.493 | -1.409 | â |
| Castro-Ginard et al. | 2020 | 259.156 | -39.688 | 0.39 | -0.494 | -1.412 | 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 | 2.30 | 3.17 | â | 9 | â | 2776 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1266* | â | â |
| Celli et al. | 2024 | â | â | â | 12 | â | 1461 | â | â |
| Cavallo et al. | 2024 | 2.07 | 3.74 | â | 14 | -0.070 | â | â | â |
| Hunt & Reffert | 2023 | 2.28 | 3.64 | 2.60 | 9 | â | â | â | â |
| Dias et al. | 2021 | 2.30 | 3.17 | â | 9 | 0.287 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.15 | 3.10 | â | 11 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit.
Cavallo et al. (2024)
Gold sample.