HSC 747
0.08
UTI
0.0
CN
0.03
Cdens
0.25
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
24
Core radius and density
1.5 [pc], 0.1 [pc-2]
- CN 0.0 Sparse
- Cdens 0.03 Very loose
- CC3 0.25 Low 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 747 is a sparse, very loose object of low C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the age and metallicity parameters (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 | 345.721 | 28.595 | 4.011 | 8.285 | -3.173 | -4.38 |
| Yang et al. | 2025 | 345.797 | 28.694 | â | â | â | â |
| Zhang et al. | 2024 | 345.797 | 28.694 | â | â | â | â |
| Cavallo et al. | 2024 | 345.736 | 28.466 | 3.982 | â | â | â |
| Hunt & Reffert | 2023 | 345.797 | 28.694 | 4.003 | 8.325 | -3.239 | -0.879 |
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 | 0.25 | 0.39 | 0.6 | 3793 | -0.037 | â | â | â |
| Yang et al. | 2025 | â | â | â | 3802 | -0.100(3) | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.037(1) | â | â | â |
| Cavallo et al. | 2024 | 0.25 | 0.61 | â | 380 | 0.210 | â | â | â |
| Hunt & Reffert | 2023 | 0.25 | 0.17 | 0.60 | 3793 | 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 moving group. CMD class: 0.01 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.01 (50th percentile).