HSC 197
0.23
UTI
0.25
CN
0.08
Cdens
0.75
CC3
0.03
Clit
1.0
Cdup
Nm (P>50%)
25
Core radius and density
2.5 [pc], 0.4 [pc-2]
- CN 0.25 Poorly populated
- Cdens 0.08 Very loose
- CC3 0.75 High quality
- Clit 0.03 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 197 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age 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 | 273.013 | -13.017 | 0.466 | 0.245 | -1.2 | 6.837 |
| Hunt & Reffert | 2024 | 273.007 | -12.992 | 0.469 | 0.276 | -1.171 | 6.805 |
| Cavallo et al. | 2024 | 272.961 | -13.055 | 0.471 | â | â | â |
| Hunt & Reffert | 2023 | 273.007 | -12.992 | 0.469 | 0.276 | -1.171 | 6.805 |
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 | 2.01 | 4.94 | 2.85 | 503 | -0.050 | 696 | â | â |
| Hunt & Reffert | 2024 | 2.01 | 4.94 | 2.85 | 503 | â | 696(1) | â | â |
| Cavallo et al. | 2024 | 2.68 | 5.42 | â | 32 | -0.050 | â | â | â |
| Hunt & Reffert | 2023 | 2.01 | 4.94 | 2.85 | 504 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Silver sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.05 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.05 (50th percentile).