UPK 442
0.66
UTI
0.73
CN
0.39
Cdens
1.0
CC3
0.6
Clit
1.0
Cdup
Radius (P>50% members)
38.1 [arcmin]
- CN 0.73 Moderately populated
- Cdens 0.39 Loose
- CC3 1.0 Very high quality
- Clit 0.6 Moderately studied
- Cdup 1.0 Unique
Overview
UPK 442 is a moderately populated, loose object of very high C3 quality. Its parallax locates it at a close distance, below 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 age parameter (see Parameters). It is moderately studied in the literature.
Close
Low extinction
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 98.163 | -11.77 | 1.579 | -2.575 | -1.358 | 22.394 |
| Li et al. | 2025 | 98.4 | -11.549 | 1.558 | -2.58 | -1.322 | â |
| Almeida et al. | 2025 | 98.601 | -11.806 | â | â | â | â |
| Alfonso et al. | 2024 | 98.23 | -12.045 | 1.536 | -2.523 | -1.381 | â |
| Cavallo et al. | 2024 | 98.203 | -11.98 | 1.549 | â | â | â |
| Hunt & Reffert | 2023 | 97.852 | -12.557 | 1.539 | -2.551 | -1.34 | 20.99 |
| Tarricq et al. | 2022 | 98.026 | -11.388 | 1.597 | -2.561 | -1.394 | â |
| Dias et al. | 2021 | 98.601 | -11.806 | 1.512 | -2.562 | -1.315 | 26.227 |
| Cantat-Gaudin et al. | 2020 | 98.4 | -11.549 | 1.558 | -2.58 | -1.322 | â |
| Cantat-Gaudin & Anders | 2020 | 98.406 | -11.705 | 1.516 | -2.569 | -1.294 | â |
| Sim et al. | 2019 | 98.484 | -11.755 | â | -2.54 | -1.32 | 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 | 0.66 | 0.34 | â | 82 | -0.044 | â | â | â |
| Almeida et al. | 2025 | 0.65 | 0.54 | â | 85 | â | 170 | â | â |
| Alfonso et al. | 2024 | 0.62 | 0.26 | â | 43 | -0.152 | â | â | â |
| Cavallo et al. | 2024 | 0.68 | 0.45 | â | 12 | 0.140 | â | â | â |
| Hunt & Reffert | 2023 | 0.61 | 0.22 | 1.26 | 68 | â | â | â | â |
| Tarricq et al. | 2022 | 0.61 | â | â | 178 | â | â | â | â |
| Dias et al. | 2021 | 0.65 | 0.54 | â | 85 | -0.152 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 0.62 | 0.26 | â | 170 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 0.65 | â | â | â | â | â | â | â |
| Sim et al. | 2019 | 0.64 | â | â | 50 | 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 a moving group.