HSC 2225
0.08
UTI
0.0
CN
0.14
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.7 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.14 Very loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
HSC 2225 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very close distance, above 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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 155.698 | -37.692 | 3.351 | 2.805 | -5.787 | -5.578 |
| Cavallo et al. | 2024 | 156.381 | -37.766 | 3.365 | â | â | â |
| Hunt & Reffert | 2023 | 157.039 | -38.785 | 3.378 | 2.91 | -5.891 | -4.494 |
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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 0.3 | 0.16 | 0.31 | 245 | 0.090 | â | â | â |
| Liu et al. | 2025 | 0.36 | 0.12 | â | 309 | â | â | â | â |
| Cavallo et al. | 2024 | 0.30 | 0.48 | â | 245 | 0.090 | â | â | â |
| Hunt & Reffert | 2023 | 0.29 | 0.16 | 0.31 | 166 | â | â | â | â |
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 222 along with HSC_2166.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.