HSC 1845
0.21
UTI
0.27
CN
0.15
Cdens
0.5
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
27
Core radius and density
2.4 [pc], 0.7 [pc-2]
- CN 0.27 Poorly populated
- Cdens 0.15 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.06 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 1845 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young 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 | 111.672 | -18.759 | 0.283 | -1.599 | 2.198 | â |
| Hunt & Reffert | 2024 | 111.679 | -18.755 | 0.29 | -1.59 | 2.181 | â |
| Cavallo et al. | 2024 | 111.671 | -18.769 | 0.288 | â | â | â |
| Hunt & Reffert | 2023 | 111.679 | -18.755 | 0.29 | -1.59 | 2.181 | 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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 3.375 | 1.75 | 1.2 | 68 | 0.200 | 342 | â | â |
| Liu et al. | 2025 | 8.02 | 0.67 | â | 42 | â | â | â | â |
| Hunt & Reffert | 2024 | 3.19 | 1.75 | 1.20 | 93 | â | 342(1) | â | â |
| Cavallo et al. | 2024 | 3.56 | 2.04 | â | 37 | 0.200 | â | â | â |
| Hunt & Reffert | 2023 | 3.19 | 1.75 | 1.20 | 93 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 210 along with UBC_1375.
Palma et al. (2025)
Classified as optical pair P30, along with UBC_1375.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).