HSC 31
0.06
UTI
0.0
CN
0.03
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
9.9 [arcmin]
- CN 0.0 Sparse
- Cdens 0.03 Very loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 31 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as an extremely massive, metal-poor, 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.
Distant
High extinction
Extremely massive
Metal-poor
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 266.587 | -26.023 | 0.296 | -0.525 | -1.875 | 10.087 |
| Hunt & Reffert | 2024 | 266.586 | -26.041 | 0.294 | -0.546 | -1.857 | -11.975 |
| Cavallo et al. | 2024 | 266.583 | -26.032 | 0.29 | â | â | â |
| Hunt & Reffert | 2023 | 266.586 | -26.041 | 0.294 | -0.546 | -1.857 | -11.975 |
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 | 26499* | â | â |
| Cavallo et al. | 2024 | 3.82 | 4.36 | â | 631 | -0.930 | â | â | â |
| Hunt & Reffert | 2023 | 3.04 | 4.38 | 3.19 | 233 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Bronze sample.