HSC 686
0.08
UTI
0.0
CN
0.04
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
10.1 [arcmin]
- CN 0.0 Sparse
- Cdens 0.04 Very loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 686 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, well below the mid-plane, affected by low extinction. It is catalogued as a very 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.
Relatively close
Low extinction
Very old
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 330.314 | 34.289 | 0.323 | -2.164 | -3.214 | â |
| Hunt & Reffert | 2023 | 330.305 | 34.319 | 0.33 | -2.173 | -3.146 | â |
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 | 2023 | 2.88 | 0.34 | 0.82 | 5559 | â | â | â | â |
Hunt & Reffert (2024)
Classified as a moving group.