HSC 582
0.23
UTI
0.28
CN
0.08
Cdens
0.62
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
28
Core radius and density
2.2 [pc], 0.4 [pc-2]
- CN 0.28 Poorly populated
- Cdens 0.08 Very loose
- CC3 0.62 Intermediate quality
- Clit 0.1 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
HSC 582 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported 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 | 300.143 | 37.304 | 0.857 | 1.011 | -0.932 | -18.418 |
| Hu & Soubiran | 2025 | 300.209 | 37.309 | â | â | â | â |
| Hunt & Reffert | 2024 | 300.106 | 37.411 | 0.851 | 1.062 | -0.893 | -21.509 |
| Cavallo et al. | 2024 | 300.208 | 37.309 | 0.847 | â | â | â |
| Hunt & Reffert | 2023 | 300.106 | 37.411 | 0.851 | 1.062 | -0.893 | -21.509 |
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 | 1.15 | 0.425 | 0.6 | 668 | 0.150 | 43 | â | â |
| Liu et al. | 2025 | 1.38 | 0.20 | â | 794 | â | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.230(5) | â | â | â |
| Hunt & Reffert | 2024 | 1.15 | 0.43 | 0.60 | 561 | â | 43(1) | â | â |
| Cavallo et al. | 2024 | 1.15 | 0.50 | â | 776 | 0.530 | â | â | â |
| Hunt & Reffert | 2023 | 1.15 | 0.42 | 0.60 | 561 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 15 along with ASCC_108.
Palma et al. (2025)
Classified as optical pair P263, along with ASCC_108.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.98 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.98 (50th percentile).