HSC 999
0.06
UTI
0.0
CN
0.16
Cdens
0.12
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
14.7 [arcmin]
- CN 0.0 Sparse
- Cdens 0.16 Very loose
- CC3 0.12 Very low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 999 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, 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.
Relatively close
Low 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 | 16.72 | 57.454 | 0.821 | -0.851 | -2.53 | -32.09 |
| Zhang et al. | 2024 | 17.068 | 57.485 | â | â | â | â |
| Cavallo et al. | 2024 | 16.223 | 57.445 | 0.82 | â | â | â |
| Hunt & Reffert | 2023 | 17.068 | 57.485 | 0.82 | -0.877 | -2.525 | -24.895 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Zhang et al. | 2024 | â | â | â | â | -0.366* | â | â | â |
| Cavallo et al. | 2024 | 1.33 | 1.21 | â | 251 | -0.110 | â | â | â |
| Hunt & Reffert | 2023 | 1.19 | 0.77 | 0.77 | 242 | 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.