UPK 385
(OCSN 307)
0.65
UTI
0.55
CN
1.0
Cdens
1.0
CC3
0.35
Clit
1.0
Cdup
Stellar density (N50/rad)
15.3 [N/pc2]
- CN 0.55 Moderately populated
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.35 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 385 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (see Parameters). It is poorly studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 75.647 | 12.983 | 3.159 | 1.829 | -3.478 | 14.722 |
| Almeida et al. | 2025 | 75.727 | 13.06 | â | â | â | â |
| Alfonso et al. | 2024 | 75.65 | 13.031 | 3.102 | 1.842 | -3.431 | â |
| Zhang et al. | 2024 | 75.701 | 12.948 | â | â | â | â |
| Celli et al. | 2024 | 75.647 | 13.02 | â | â | â | â |
| Cavallo et al. | 2024 | 75.793 | 12.997 | 3.163 | â | â | â |
| Hunt & Reffert | 2023 | 75.701 | 12.948 | 3.16 | 1.75 | -3.461 | 15.858 |
| Almeida et al. | 2023 | 75.675 | 13.082 | â | â | â | â |
| Qin et al. | 2023 | 75.7 | 12.99 | 3.21 | 1.78 | -3.59 | 15.2 |
| He et al. | 2022 | 75.712 | 13.045 | 3.172 | 1.835 | -3.477 | â |
| Dias et al. | 2021 | 75.727 | 13.06 | 3.141 | 1.824 | -3.5 | 24.24 |
| Cantat-Gaudin et al. | 2020 | 75.647 | 13.02 | 3.133 | 1.809 | -3.484 | â |
| Cantat-Gaudin & Anders | 2020 | 75.647 | 13.02 | 3.133 | 1.96 | -3.535 | â |
| Sim et al. | 2019 | 75.739 | 12.968 | â | 1.87 | -3.52 | 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 | 0.32 | 0.72 | 1.12 | 12 | -0.077 | 35 | 0.53 | â |
| Almeida et al. | 2025 | 0.32 | 0.72 | â | 12 | â | 35 | â | â |
| Alfonso et al. | 2024 | 0.32 | 0.87 | â | 12 | -0.116 | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.077(1) | â | â | â |
| Celli et al. | 2024 | â | â | â | 12 | â | 20 | â | â |
| Cavallo et al. | 2024 | 0.32 | 1.37 | â | 13 | 0.380 | â | â | â |
| Hunt & Reffert | 2023 | 0.30 | 0.57 | 1.12 | 10 | â | â | â | â |
| Almeida et al. | 2023 | 0.31 | 0.68 | â | 27 | 0.192 | 61(1) | 0.53 | â |
| Qin et al. | 2023 | 0.34 | 0.41 | â | 14 | â | â | â | â |
| He et al. | 2022 | â | 0.25 | â | 8 | â | â | â | â |
| Dias et al. | 2021 | 0.32 | 0.72 | â | 12 | -0.116 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 0.32 | 0.87 | â | 12 | â | â | â | â |
| Cantat-Gaudin & Anders | 2020 | 0.32 | â | â | â | â | â | â | â |
| Sim et al. | 2019 | 0.32 | â | â | 10 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P432, along with HSC_1527.
Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit. Silver sample.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.88 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.88 (50th percentile).