HSC 2309
0.07
UTI
0.0
CN
0.21
Cdens
0.12
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
8.2 [arcmin]
- CN 0.0 Sparse
- Cdens 0.21 Very loose
- CC3 0.12 Very low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
HSC 2309 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.
Note: This object shares a very small percentage of members with at least one entry reported in the same catalogue. See table with shared members information.
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
Moderate 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 | 153.907 | -56.27 | 0.556 | -8.636 | 4.192 | -2.86 |
| Hunt & Reffert | 2024 | 153.888 | -56.26 | 0.564 | -8.631 | 4.21 | -2.915 |
| Cavallo et al. | 2024 | 154.008 | -56.298 | 0.56 | â | â | â |
| Hunt & Reffert | 2023 | 153.888 | -56.26 | 0.564 | -8.631 | 4.21 | -2.915 |
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 | 102* | â | â |
| Cavallo et al. | 2024 | 1.72 | 2.69 | â | 135 | -0.020 | â | â | â |
| Hunt & Reffert | 2023 | 1.69 | 2.07 | 2.10 | 220 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.