HSC 1957
0.15
UTI
0.26
CN
0.19
Cdens
0.38
CC3
0.0
Clit
0.92
Cdup
Radius (P>50% members)
6.2 [arcmin]
- CN 0.26 Poorly populated
- Cdens 0.19 Very loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 0.92 Very likely unique
Overview
HSC 1957 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.
Note: This is very likely 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=0.92) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Relatively close
Moderate extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 115.775 | -28.159 | 0.343 | -2.36 | 2.408 | 102.042 |
| Hunt & Reffert | 2024 | 115.798 | -28.173 | 0.337 | -2.378 | 2.406 | 102.017 |
| Cavallo et al. | 2024 | 115.746 | -28.185 | 0.336 | â | â | â |
| Hunt & Reffert | 2023 | 115.798 | -28.173 | 0.337 | -2.378 | 2.406 | 102.017 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Hunt & Reffert | 2024 | â | â | â | â | â | 347* | â | â |
| Cavallo et al. | 2024 | 2.90 | 1.76 | â | 98 | 0.200 | â | â | â |
| Hunt & Reffert | 2023 | 2.61 | 1.53 | 2.24 | 165 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.