HSC 1864
0.13
UTI
0.0
CN
0.1
Cdens
0.75
CC3
0.0
Clit
0.76
Cdup
Radius (P>50% members)
8.2 [arcmin]
- CN 0.0 Sparse
- Cdens 0.1 Very loose
- CC3 0.75 High quality
- Clit 0.0 Rarely studied
- Cdup 0.76 Very likely unique
Overview
HSC 1864 is a sparse, very loose object of high 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, very young cluster (see Parameters). It was recently reported in the literature.
Note: This is very likely a unique object, which shares a 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=0.76) 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
Very young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 110.673 | -20.875 | 0.351 | -2.543 | 3.231 | â |
| Hunt & Reffert | 2024 | 110.722 | -20.886 | 0.353 | -2.544 | 3.239 | â |
| Cavallo et al. | 2024 | 110.659 | -20.846 | 0.352 | â | â | â |
| Hunt & Reffert | 2023 | 110.722 | -20.886 | 0.353 | -2.544 | 3.239 | 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 | 2024 | â | â | â | â | â | 134* | â | â |
| Cavallo et al. | 2024 | 2.37 | 1.00 | â | 19 | -0.440 | â | â | â |
| Hunt & Reffert | 2023 | 2.67 | 1.08 | 0.84 | 20 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.