HSC 494
0.18
UTI
0.0
CN
0.16
Cdens
0.62
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
22
Core radius and density
1.7 [pc], 0.8 [pc-2]
- CN 0.0 Sparse
- Cdens 0.16 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 494 is a sparse, very loose object of intermediate 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.
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 | 298.12 | 23.823 | 0.611 | 0.582 | -0.655 | 10.297 |
| Hu & Soubiran | 2025 | 298.174 | 23.862 | â | â | â | â |
| Hunt & Reffert | 2024 | 298.127 | 23.821 | 0.628 | 0.583 | -0.604 | 10.298 |
| Cavallo et al. | 2024 | 298.174 | 23.862 | 0.619 | â | â | â |
| Hunt & Reffert | 2023 | 298.127 | 23.821 | 0.628 | 0.583 | -0.604 | 10.298 |
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 | 1.55 | 1.94 | 1.17 | 799 | 0.025 | 73 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.060(5) | â | â | â |
| Hunt & Reffert | 2024 | 1.55 | 1.94 | 1.17 | 799 | â | 73(1) | â | â |
| Cavallo et al. | 2024 | 1.78 | 1.94 | â | 1413 | 0.110 | â | â | â |
| Hunt & Reffert | 2023 | 1.55 | 1.94 | 1.17 | 798 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.81 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.81 (50th percentile).