HSC 656
0.17
UTI
0.0
CN
0.37
Cdens
0.5
CC3
0.0
Clit
0.96
Cdup
Stellar density (N50/rad)
1.8 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.37 Loose
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 0.96 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 656 is a sparse, loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It was recently reported in the literature.
Note: This is a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=0.96) 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 | 308.716 | 45.792 | 0.42 | -2.391 | -5.529 | -17.202 |
| Hunt & Reffert | 2024 | 308.715 | 45.791 | 0.413 | -2.404 | -5.549 | -17.195 |
| Cavallo et al. | 2024 | 308.713 | 45.795 | 0.413 | â | â | â |
| Hunt & Reffert | 2023 | 308.715 | 45.791 | 0.413 | -2.404 | -5.549 | -17.195 |
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 | 2.31 | 1.555 | 0.28 | 18 | 0.150 | 131 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 131(1) | â | â |
| Cavallo et al. | 2024 | 2.36 | 1.53 | â | 15 | 0.150 | â | â | â |
| Hunt & Reffert | 2023 | 2.26 | 1.58 | 0.28 | 22 | 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 P516, along with HSC_669.
Cavallo et al. (2024)
Gold sample.