HSC 1580
0.12
UTI
0.25
CN
0.08
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.4 [N/pc2]
- CN 0.25 Poorly populated
- Cdens 0.08 Very loose
- CC3 0.25 Low quality
- Clit 0.0 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 1580 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the absorption 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 | 71.559 | -2.955 | 11.384 | 18.729 | -53.452 | 20.463 |
| Liu et al. | 2025 | 70.59 | -2.33 | 11.85 | 19.58 | -55.94 | 22.4 |
| Cavallo et al. | 2024 | 71.802 | -3.841 | 11.88 | â | â | â |
| Hunt & Reffert | 2023 | 70.588 | -2.332 | 11.849 | 19.583 | -55.941 | 22.404 |
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 | 0.09 | 0.16 | 0.39 | 132 | 0.240 | â | â | â |
| Liu et al. | 2025 | 0.13 | 0.16 | â | 58 | â | â | â | â |
| Cavallo et al. | 2024 | 0.09 | 0.58 | â | 135 | 0.240 | â | â | â |
| Hunt & Reffert | 2023 | 0.09 | 0.07 | 0.39 | 132 | â | â | â | â |
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 200 along with HSC_1566, and as tidal capture (resonant trapping binary) 272 along with Mamajek_3, and of multiple system 56 along with Mamajek_3 and HSC_1566.
Palma et al. (2025)
Part of multiple system G122, along with HSC_1470, HSC_1566, HSC_1684 and HSC_1347.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.