HSC 1686
0.11
UTI
0.0
CN
0.19
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.9 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.19 Very loose
- CC3 0.38 Low quality
- Clit 0.0 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 1686 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low 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 | 106.401 | 1.013 | 0.458 | -0.735 | -2.375 | 15.829 |
| Hunt & Reffert | 2024 | 106.434 | 0.917 | 0.457 | -0.752 | -2.386 | 15.811 |
| Cavallo et al. | 2024 | 106.289 | 1.079 | 0.46 | â | â | â |
| Hunt & Reffert | 2023 | 106.434 | 0.917 | 0.457 | -0.752 | -2.386 | 15.811 |
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 | 1.87 | 0.32 | 0.99 | 416 | 0.100 | 99 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 99(1) | â | â |
| Cavallo et al. | 2024 | 1.74 | 0.27 | â | 437 | 0.100 | â | â | â |
| Hunt & Reffert | 2023 | 2.00 | 0.37 | 0.99 | 396 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P134, along with UBC_1342.
Cavallo et al. (2024)
Gold sample.