HSC 997
0.23
UTI
0.0
CN
0.54
Cdens
0.62
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
3.2 [arcmin]
- CN 0.0 Sparse
- Cdens 0.54 Moderately dense
- CC3 0.62 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 997 is a sparse, moderately dense object of intermediate 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, very young 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.
Relatively close
High extinction
Near-solar metallicity
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 17.762 | 65.252 | 0.327 | -2.543 | 0.001 | 71.66 |
| Hunt & Reffert | 2024 | 17.802 | 65.226 | 0.341 | -2.512 | -0.01 | 145.138 |
| Cavallo et al. | 2024 | 17.718 | 65.263 | 0.337 | â | â | â |
| Hunt & Reffert | 2023 | 17.802 | 65.226 | 0.341 | -2.512 | -0.01 | 145.138 |
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 | 523* | â | â |
| Cavallo et al. | 2024 | 3.16 | 4.08 | â | 15 | 0.270 | â | â | â |
| Hunt & Reffert | 2023 | 2.78 | 4.49 | 1.60 | 8 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.