HSC 824
0.20
UTI
0.0
CN
0.22
Cdens
0.62
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
24
Core radius and density
1.8 [pc], 1.1 [pc-2]
- CN 0.0 Sparse
- Cdens 0.22 Very loose
- CC3 0.62 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 824 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption parameter (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 | 333.833 | 61.787 | 1.071 | -0.522 | -2.818 | -16.765 |
| Liu et al. | 2025 | 333.93 | 61.79 | 1.09 | -0.51 | -2.81 | -13.06 |
| Hunt & Reffert | 2024 | 333.934 | 61.789 | 1.092 | -0.512 | -2.814 | -13.059 |
| Cavallo et al. | 2024 | 333.744 | 61.826 | 1.088 | â | â | â |
| Hunt & Reffert | 2023 | 333.934 | 61.789 | 1.092 | -0.512 | -2.814 | -13.059 |
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 | 0.935 | 0.86 | 0.68 | 4 | -0.020 | 56 | â | â |
| Liu et al. | 2025 | 1.17 | 0.35 | â | 9 | â | â | â | â |
| Hunt & Reffert | 2024 | 0.90 | 0.86 | 0.68 | 4 | â | 56(1) | â | â |
| Cavallo et al. | 2024 | 0.97 | 1.74 | â | 4 | -0.020 | â | â | â |
| Hunt & Reffert | 2023 | 0.90 | 0.86 | 0.68 | 4 | 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) 176 along with Pismis-Moreno_1, and of multiple system 34 along with Pismis-Moreno_1, CWNU_1126, CWNU_1228, HSC_853 and OC_0185.
Palma et al. (2025)
Part of multiple system G30, along with Pismis-Moreno_1, OC_0185, CWNU_1126, CWNU_1228, FSR_0398 and CWNU_446.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).