UPK 325
0.27
UTI
0.36
CN
0.1
Cdens
0.5
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
36
Core radius and density
3.6 [pc], 0.5 [pc-2]
- CN 0.36 Poorly populated
- Cdens 0.1 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.19 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
UPK 325 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 66.102 | 50.486 | 1.304 | -1.595 | -2.324 | -17.069 |
| Yang et al. | 2025 | 66.37 | 50.495 | â | â | â | â |
| Zhang et al. | 2024 | 66.37 | 50.495 | â | â | â | â |
| Hunt & Reffert | 2024 | 66.37 | 50.495 | 1.309 | -1.638 | -2.275 | -18.47 |
| Cavallo et al. | 2024 | 65.801 | 50.715 | 1.315 | â | â | â |
| Hunt & Reffert | 2023 | 66.37 | 50.495 | 1.309 | -1.638 | -2.275 | -18.47 |
| He et al. | 2022 | 65.996 | 50.364 | 1.316 | -0.137 | -3.23 | â |
| Sim et al. | 2019 | 66.121 | 50.389 | â | -1.55 | -2.3 | 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 | 0.76 | 0.92 | 0.89 | 76 | -0.120 | 60 | â | â |
| Liu et al. | 2025 | 1.03 | 0.40 | â | 76 | â | â | â | â |
| Yang et al. | 2025 | â | â | â | 36 | -0.170(3) | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.120(1) | â | â | â |
| Hunt & Reffert | 2024 | 0.72 | 0.92 | 0.89 | 36 | â | 60(1) | â | â |
| Cavallo et al. | 2024 | 0.77 | 1.35 | â | 93 | 0.020 | â | â | â |
| Hunt & Reffert | 2023 | 0.72 | 0.92 | 0.89 | 36 | â | â | â | â |
| He et al. | 2022 | â | 1.80 | â | 355 | â | â | â | â |
| Sim et al. | 2019 | 0.76 | â | â | 89 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as primordial binary cluster 276 along with NGC_1545.
Palma et al. (2025)
Part of multiple system G106, along with CWNU_1086, Theia_47, HSC_1210, Theia_1083 and HSC_1205.
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).