UBC 155
0.64
UTI
0.56
CN
1.0
Cdens
0.75
CC3
0.44
Clit
1.0
Cdup
Radius (P>50% members)
6.2 [arcmin]
- CN 0.56 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.44 Poorly studied
- Cdup 1.0 Unique
Overview
UBC 155 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
Relatively close
High 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 | 318.426 | 50.134 | 0.6 | -2.919 | -4.092 | -13.707 |
| Almeida et al. | 2025 | 318.43 | 50.139 | â | â | â | â |
| Hunt & Reffert | 2024 | 318.414 | 50.102 | 0.596 | -2.918 | -4.11 | 1.74 |
| Cavallo et al. | 2024 | 318.426 | 50.155 | 0.599 | â | â | â |
| Hunt & Reffert | 2023 | 318.414 | 50.102 | 0.596 | -2.918 | -4.11 | 1.74 |
| Dias et al. | 2021 | 318.43 | 50.139 | 0.562 | -2.886 | -4.054 | â |
| Cantat-Gaudin et al. | 2020 | 318.413 | 50.134 | 0.58 | -2.893 | -4.058 | â |
| Castro-Ginard et al. | 2020 | 318.408 | 50.15 | 0.577 | -2.89 | -4.063 | 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 | 1.64 | 3.28 | â | 13 | â | 531 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 925* | â | â |
| Cavallo et al. | 2024 | 1.71 | 3.86 | â | 58 | 0.410 | â | â | â |
| Hunt & Reffert | 2023 | 1.59 | 3.79 | 2.66 | 121 | â | â | â | â |
| Dias et al. | 2021 | 1.64 | 3.28 | â | 13 | 0.047 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.59 | 2.63 | â | 479 | 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.