UBC 355
0.71
UTI
0.75
CN
1.0
Cdens
1.0
CC3
0.4
Clit
1.0
Cdup
Stellar density (N50/rad)
35.1 [N/pc2]
- CN 0.75 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.4 Poorly 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 355 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 moderate extinction. It is catalogued as a massive, near-solar metallicity, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.
Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 281.916 | -3.815 | 0.456 | -0.649 | -1.873 | 9.484 |
| Li et al. | 2025 | 281.923 | -3.817 | 0.451 | -0.692 | -1.899 | â |
| Hunt & Reffert | 2024 | 281.918 | -3.823 | 0.453 | -0.635 | -1.876 | 3.91 |
| Celli et al. | 2024 | 281.922 | -3.818 | â | â | â | â |
| Cavallo et al. | 2024 | 281.909 | -3.821 | 0.45 | â | â | â |
| Hunt & Reffert | 2023 | 281.918 | -3.823 | 0.453 | -0.635 | -1.876 | 3.91 |
| Cantat-Gaudin et al. | 2020 | 281.923 | -3.817 | 0.451 | -0.692 | -1.899 | â |
| Castro-Ginard et al. | 2020 | 281.922 | -3.818 | 0.445 | -0.699 | -1.909 | 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 | 1.945 | 2.93 | 2.4 | 37 | 0.354 | 1036 | â | â |
| Li et al. | 2025 | 0.83 | 1.91 | â | 1698 | 0.029 | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1395(1) | â | â |
| Celli et al. | 2024 | â | â | â | 24 | â | 676 | â | â |
| Cavallo et al. | 2024 | 2.12 | 3.41 | â | 115 | 0.680 | â | â | â |
| Hunt & Reffert | 2023 | 2.04 | 3.66 | 2.40 | 37 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.85 | 2.45 | â | 25 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Part of multiple system G254, along with CWNU_2847, UBC_1045 and UBC_1043.
Cavallo et al. (2024)
Gold sample.
Castro-Ginard et al. (2020)
Tentative identification with Kharchenko et al. (2013, Cat. J/A+A/558/A53), see Sect. 4.1.3.