UBC 163
0.45
UTI
0.68
CN
0.36
Cdens
0.75
CC3
0.23
Clit
1.0
Cdup
Nm (P>50%)
87
Core radius and density
2.9 [pc], 1.8 [pc-2]
- CN 0.68 Moderately populated
- Cdens 0.36 Loose
- CC3 0.75 High quality
- Clit 0.23 Rarely 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 163 is a moderately populated, loose object of 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, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is rarely 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 | 330.832 | 55.639 | 0.632 | -1.984 | -3.247 | -27.253 |
| Li et al. | 2025 | 330.873 | 55.643 | 0.609 | -1.958 | -3.22 | â |
| Hunt & Reffert | 2024 | 330.886 | 55.641 | 0.615 | -1.995 | -3.216 | -21.886 |
| Cavallo et al. | 2024 | 330.828 | 55.623 | 0.622 | â | â | â |
| Hunt & Reffert | 2023 | 330.886 | 55.641 | 0.615 | -1.995 | -3.216 | -21.886 |
| Tarricq et al. | 2022 | 330.897 | 55.639 | 0.636 | -1.985 | -3.242 | â |
| Jadhav & Subramaniam | 2021 | 330.873 | 55.643 | â | â | â | â |
| Cantat-Gaudin et al. | 2020 | 330.873 | 55.643 | 0.609 | -1.958 | -3.22 | â |
| Castro-Ginard et al. | 2020 | 330.894 | 55.66 | 0.606 | -1.974 | -3.222 | 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 | 1.515 | 1.61 | 1.57 | 212 | 0.371 | 376 | â | 0 |
| Li et al. | 2025 | 1.41 | 1.48 | â | 224 | 0.243 | â | â | â |
| Hunt & Reffert | 2024 | 1.50 | 1.61 | 1.57 | 200 | â | 544(1) | â | â |
| Cavallo et al. | 2024 | 1.91 | 1.84 | â | 129 | 0.500 | â | â | â |
| Hunt & Reffert | 2023 | 1.50 | 1.61 | 1.57 | 200 | â | â | â | â |
| Tarricq et al. | 2022 | 1.47 | â | â | 708 | â | â | â | â |
| Jadhav & Subramaniam | 2021 | 1.53 | 1.29 | â | 617 | â | 208 | â | 0(1) |
| Cantat-Gaudin et al. | 2020 | 1.53 | 1.29 | â | 617 | â | â | â | â |
| Kounkel et al. | 2020 | 1.54 | 2.05 | â | 191 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P536, along with HXHWL_28.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).