UBC 552
0.75
UTI
0.75
CN
1.0
Cdens
1.0
CC3
0.5
Clit
1.0
Cdup
Radius (P>50% members)
4.8 [arcmin]
- CN 0.75 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.5 Moderately studied
- Cdup 1.0 Unique
Overview
UBC 552 is a rich, very dense 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 near-solar metallicity, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is moderately studied in the literature.
Relatively close
High extinction
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 | 254.728 | -42.06 | 0.384 | -0.204 | -0.397 | -29.449 |
| Almeida et al. | 2025 | 254.689 | -42.035 | â | â | â | â |
| Hunt & Reffert | 2024 | 254.73 | -42.067 | 0.394 | -0.211 | -0.434 | 23.892 |
| Celli et al. | 2024 | 254.724 | -42.06 | â | â | â | â |
| Cavallo et al. | 2024 | 254.699 | -42.039 | 0.396 | â | â | â |
| Hunt & Reffert | 2023 | 254.73 | -42.067 | 0.394 | -0.211 | -0.434 | 23.892 |
| Dias et al. | 2021 | 254.689 | -42.035 | 0.368 | -0.177 | -0.371 | â |
| Cantat-Gaudin et al. | 2020 | 254.724 | -42.06 | 0.355 | -0.162 | -0.387 | â |
| Castro-Ginard et al. | 2020 | 254.712 | -42.031 | 0.356 | -0.167 | -0.394 | 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 | 2.85 | 3.26 | â | 6 | â | 690 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1527* | â | â |
| Celli et al. | 2024 | â | â | â | 11 | â | 515 | â | â |
| Cavallo et al. | 2024 | 2.06 | 3.93 | â | 98 | 0.170 | â | â | â |
| Hunt & Reffert | 2023 | 2.35 | 3.91 | 2.54 | 46 | â | â | â | â |
| Dias et al. | 2021 | 2.85 | 3.26 | â | 6 | 0.407 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 2.44 | 3.19 | 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.