UPK 241
0.20
UTI
0.26
CN
0.04
Cdens
0.38
CC3
0.16
Clit
1.0
Cdup
Nm (P>50%)
26
Core radius and density
2.7 [pc], 0.2 [pc-2]
- CN 0.26 Poorly populated
- Cdens 0.04 Very loose
- CC3 0.38 Low quality
- Clit 0.16 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 241 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a close distance, above 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 and metallicity parameters (see Parameters). It is rarely 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 | 9.834 | 65.469 | 1.023 | 0.149 | -0.221 | -9.734 |
| Li et al. | 2025 | 9.677 | 65.465 | 1.015 | 0.193 | -0.17 | â |
| Hunt & Reffert | 2024 | 8.834 | 65.463 | 1.042 | 0.13 | -0.26 | -13.038 |
| Cavallo et al. | 2024 | 9.754 | 65.491 | 1.039 | â | â | â |
| Hunt & Reffert | 2023 | 8.834 | 65.463 | 1.042 | 0.13 | -0.26 | -13.038 |
| Cantat-Gaudin et al. | 2020 | 9.677 | 65.465 | 1.015 | 0.193 | -0.17 | â |
| Cantat-Gaudin & Anders | 2020 | 9.581 | 65.47 | 1.014 | 0.18 | -0.169 | â |
| Sim et al. | 2019 | 9.705 | 65.44 | â | 0.17 | -0.2 | 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 | 0.945 | 2.845 | 1.93 | 326 | 0.231 | 60 | â | â |
| Li et al. | 2025 | 0.66 | 1.70 | â | 326 | -0.109 | â | â | â |
| Hunt & Reffert | 2024 | 0.94 | 3.01 | 1.93 | 113 | â | 60(1) | â | â |
| Cavallo et al. | 2024 | 1.10 | 2.68 | â | 407 | 0.570 | â | â | â |
| Hunt & Reffert | 2023 | 0.94 | 3.01 | 1.93 | 112 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 0.96 | â | â | â | â | â | â | â |
| Sim et al. | 2019 | 0.95 | â | â | 794 | 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 G205, along with Theia_2175 and HSC_974.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.85 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.85 (50th percentile).