HSC 817
0.11
UTI
0.0
CN
0.19
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.9 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.19 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 817 is a sparse, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age 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 | 341.051 | 53.789 | 1.252 | 3.267 | -0.824 | -24.04 |
| Zhang et al. | 2024 | 341.077 | 53.916 | â | â | â | â |
| Cavallo et al. | 2024 | 339.598 | 53.53 | 1.244 | â | â | â |
| Hunt & Reffert | 2023 | 341.077 | 53.916 | 1.244 | 3.194 | -0.858 | -28.583 |
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 | 0.795 | 0.99 | 0.58 | 294 | 0.000 | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | 0.010(1) | â | â | â |
| Cavallo et al. | 2024 | 0.81 | 1.05 | â | 363 | -0.010 | â | â | â |
| Hunt & Reffert | 2023 | 0.78 | 0.93 | 0.58 | 226 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Part of multiple system G194, along with NGC_7438 and HSC_805.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.