HSC 866
0.10
UTI
0.0
CN
0.13
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.7 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.13 Very loose
- CC3 0.38 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 866 is a sparse, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (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 | 345.929 | 60.251 | 1.069 | -1.764 | -1.814 | -1.655 |
| Hunt & Reffert | 2024 | 345.669 | 60.298 | 1.063 | -1.77 | -1.777 | -3.147 |
| Cavallo et al. | 2024 | 345.514 | 60.289 | 1.061 | â | â | â |
| Hunt & Reffert | 2023 | 345.669 | 60.298 | 1.063 | -1.77 | -1.777 | -3.147 |
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 | 0.915 | 1.845 | 1.64 | 44 | 0.070 | 80 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 80(1) | â | â |
| Cavallo et al. | 2024 | 0.94 | 1.92 | â | 47 | 0.070 | â | â | â |
| Hunt & Reffert | 2023 | 0.89 | 1.77 | 1.64 | 40 | 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 optical pair P159, along with UPK_201.
Cavallo et al. (2024)
Gold sample.