UPK 452
0.23
UTI
0.0
CN
0.23
Cdens
0.38
CC3
0.26
Clit
1.0
Cdup
Nm (P>50%)
22
Core radius and density
1.8 [pc], 1.2 [pc-2]
- CN 0.0 Sparse
- Cdens 0.23 Very loose
- CC3 0.38 Low quality
- Clit 0.26 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
UPK 452 is a sparse, very loose object of low 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, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 110.254 | -11.701 | 1.6 | -5.785 | 3.185 | 45.866 |
| Li et al. | 2025 | 110.203 | -11.712 | 1.567 | -5.757 | 3.191 | â |
| Almeida et al. | 2025 | 110.137 | -11.73 | â | â | â | â |
| Alfonso et al. | 2024 | 110.342 | -11.641 | 1.566 | -5.778 | 3.102 | â |
| Cavallo et al. | 2024 | 110.295 | -11.636 | 1.607 | â | â | â |
| Hunt & Reffert | 2023 | 110.366 | -11.788 | 1.602 | -5.813 | 3.264 | 41.311 |
| Tarricq et al. | 2022 | 108.089 | -11.676 | 1.697 | -5.631 | 2.977 | â |
| Dias et al. | 2021 | 110.137 | -11.73 | 1.53 | -5.74 | 3.181 | â |
| Cantat-Gaudin et al. | 2020 | 110.203 | -11.712 | 1.567 | -5.757 | 3.191 | â |
| Cantat-Gaudin & Anders | 2020 | 110.203 | -11.712 | 1.569 | -5.775 | 3.152 | â |
| Sim et al. | 2019 | 110.231 | -11.655 | â | -5.8 | 3.19 | 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 | 0.63 | 0.28 | 0.17 | 170 | -0.073 | 64 | â | â |
| Li et al. | 2025 | 0.65 | 0.14 | â | 75 | 0.262 | â | â | â |
| Almeida et al. | 2025 | 0.63 | 0.41 | â | 186 | â | 64 | â | â |
| Alfonso et al. | 2024 | 0.64 | 0.28 | â | 134 | -0.073 | â | â | â |
| Cavallo et al. | 2024 | 0.52 | 0.39 | â | 389 | -1.060 | â | â | â |
| Hunt & Reffert | 2023 | 0.58 | 0.07 | 0.17 | 240 | â | â | â | â |
| Tarricq et al. | 2022 | 0.62 | â | â | 170 | â | â | â | â |
| Dias et al. | 2021 | 0.63 | 0.41 | â | 186 | -0.073 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 0.64 | 0.28 | â | 166 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 0.63 | â | â | â | â | â | â | â |
| Sim et al. | 2019 | 0.62 | â | â | 40 | â | â | â | â |
Almeida et al. (2025)
Mass determination: good fit. Isochrone match: good fit.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hu et al. (2021)
Ellipticities (core, all): e_core=0.0435, e_all=0.1633.