UPK 7
0.75
UTI
0.5
CN
1.0
Cdens
0.75
CC3
0.75
Clit
1.0
Cdup
Radius (P>50% members)
13.1 [arcmin]
- CN 0.5 Moderately populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.75 Well-studied
- Cdup 1.0 Unique
Overview
UPK 7 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a 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 well-studied in the literature.
Close
Moderate extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 276.791 | -17.336 | 1.243 | -0.338 | -5.849 | -6.315 |
| Li et al. | 2025 | 276.781 | -17.401 | 1.26 | -0.294 | -5.865 | â |
| Hu & Soubiran | 2025 | 276.789 | -17.327 | â | â | â | â |
| Almeida et al. | 2025 | 276.769 | -17.36 | â | â | â | â |
| Alfonso et al. | 2024 | 276.795 | -17.335 | 1.198 | -0.32 | -5.747 | â |
| Hunt & Reffert | 2024 | 276.801 | -17.346 | 1.251 | -0.344 | -5.841 | -6.537 |
| Cavallo et al. | 2024 | 276.789 | -17.327 | 1.25 | â | â | â |
| Hunt & Reffert | 2023 | 276.801 | -17.346 | 1.251 | -0.344 | -5.841 | -6.537 |
| He et al. | 2022 | 276.788 | -17.37 | 1.263 | -0.339 | -5.783 | â |
| Tarricq et al. | 2022 | 276.761 | -17.397 | 1.255 | -0.382 | -5.771 | â |
| Dias et al. | 2021 | 276.769 | -17.36 | 1.254 | -0.272 | -5.847 | -1.937 |
| Cantat-Gaudin et al. | 2020 | 276.781 | -17.401 | 1.26 | -0.294 | -5.865 | â |
| Cantat-Gaudin & Anders | 2020 | 276.784 | -17.342 | 1.251 | -0.263 | -5.843 | â |
| Sim et al. | 2019 | 276.772 | -17.371 | â | -0.28 | -5.87 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 0.74 | 0.93 | â | 513 | -0.045 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.200* | â | â | â |
| Almeida et al. | 2025 | 0.77 | 1.07 | â | 128 | â | 75 | â | â |
| Alfonso et al. | 2024 | 0.78 | 0.89 | â | 225 | 0.084 | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 176* | â | â |
| Cavallo et al. | 2024 | 0.69 | 1.00 | â | 525 | -0.180 | â | â | â |
| Hunt & Reffert | 2023 | 0.76 | 1.14 | 1.02 | 102 | â | â | â | â |
| He et al. | 2022 | â | 1.45 | â | 282 | â | â | â | â |
| Tarricq et al. | 2022 | 0.77 | â | â | 302 | â | â | â | â |
| Dias et al. | 2021 | 0.77 | 1.07 | â | 128 | 0.084 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 0.78 | 0.89 | â | 288 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 0.78 | â | â | â | â | â | â | â |
| Sim et al. | 2019 | 0.77 | â | â | 251 | 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: good fit. Silver sample.
Cavallo et al. (2024)
Gold sample.