HSC 1561
0.26
UTI
0.26
CN
0.18
Cdens
0.25
CC3
0.3
Clit
1.0
Cdup
Stellar density (N50/rad)
0.9 [N/pc2]
- CN 0.26 Poorly populated
- Cdens 0.18 Very loose
- CC3 0.25 Low quality
- Clit 0.3 Poorly 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 1561 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity 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 | 95.631 | 14.396 | 1.015 | -0.082 | -2.092 | 12.763 |
| Liu et al. | 2025 | 95.55 | 14.4 | 1.02 | -0.09 | -2.1 | 16.68 |
| Zhang et al. | 2024 | 95.552 | 14.401 | â | â | â | â |
| Hunt & Reffert | 2024 | 95.552 | 14.401 | 1.019 | -0.086 | -2.101 | 16.679 |
| Cavallo et al. | 2024 | 95.689 | 14.473 | 1.019 | â | â | â |
| Hunt & Reffert | 2023 | 95.552 | 14.401 | 1.019 | -0.086 | -2.101 | 16.679 |
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 | 0.98 | 0.75 | 1.07 | 112 | -0.288 | 89 | â | â |
| Liu et al. | 2025 | 1.56 | 0.34 | â | 44 | â | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.126(1) | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 89(1) | â | â |
| Cavallo et al. | 2024 | 0.98 | 0.98 | â | 112 | -0.450 | â | â | â |
| Hunt & Reffert | 2023 | 0.94 | 0.75 | 1.07 | 201 | 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 primordial binary cluster 199 along with HSC_1551, and of multiple system 54 along with HSC_1551 and NGC_2169.
Palma et al. (2025)
Part of multiple system G120, along with HSC_1551 and NGC_2169.
Cavallo et al. (2024)
Gold sample.