HSC 172
0.03
UTI
0.0
CN
0.01
Cdens
0.12
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
7.0 [arcmin]
- CN 0.0 Sparse
- Cdens 0.01 Very loose
- CC3 0.12 Very low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 172 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a large distance, well above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, old 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.
Very distant
Moderate extinction
Near-solar metallicity
Old
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 259.237 | -8.734 | 0.122 | -2.081 | -5.904 | 126.707 |
| Hu & Soubiran | 2025 | 259.235 | -8.764 | â | â | â | â |
| Cavallo et al. | 2024 | 259.235 | -8.764 | 0.114 | â | â | â |
| Hunt & Reffert | 2023 | 259.231 | -8.74 | 0.117 | -1.995 | -5.986 | -15.57 |
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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | -0.230* | â | â | â |
| Cavallo et al. | 2024 | 7.28 | 1.00 | â | 6166 | -0.020 | â | â | â |
| Hunt & Reffert | 2023 | 6.72 | 2.76 | 1.79 | 371 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.