HSC 1856
0.23
UTI
0.34
CN
0.3
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
1.5 [N/pc2]
- CN 0.34 Poorly populated
- Cdens 0.3 Loose
- CC3 0.5 Intermediate 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 1856 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a metal-rich, young 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 | 110.561 | -20.252 | 1.787 | -5.569 | 4.359 | 32.922 |
| Wei et al. | 2025 | 111.186 | -20.377 | 1.898 | -6.408 | 4.699 | â |
| Cavallo et al. | 2024 | 110.403 | -20.306 | 1.789 | â | â | â |
| Hunt & Reffert | 2023 | 110.53 | -20.264 | 1.786 | -5.496 | 4.343 | 34.975 |
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 | 0.59 | 0.26 | 0.72 | 86 | 0.595 | 315 | 0.4 | â |
| Wei et al. | 2025 | 0.59 | 0.26 | â | 59 | 0.500 | 315 | 0.40 | â |
| Cavallo et al. | 2024 | 0.59 | 0.00 | â | 126 | 0.690 | â | â | â |
| Hunt & Reffert | 2023 | 0.54 | 0.30 | 0.72 | 86 | â | â | â | â |
Palma et al. (2025)
Classified as optical pair P446, along with HSC_1850.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.