HSC 1640
0.22
UTI
0.27
CN
0.06
Cdens
0.75
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.3 [N/pc2]
- CN 0.27 Poorly populated
- Cdens 0.06 Very loose
- CC3 0.75 High 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 1640 is a poorly populated, very loose object of high 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, very young 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 | 68.774 | -10.41 | 4.175 | 2.341 | -3.701 | 9.995 |
| Zhang et al. | 2024 | 67.137 | -12.157 | â | â | â | â |
| Cavallo et al. | 2024 | 67.533 | -10.013 | 4.332 | â | â | â |
| Hunt & Reffert | 2023 | 67.137 | -12.157 | 4.319 | 2.206 | -3.776 | 13.37 |
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 | 0.235 | 0.515 | 0.77 | 18 | 0.041 | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.149(1) | â | â | â |
| Cavallo et al. | 2024 | 0.23 | 0.72 | â | 19 | 0.230 | â | â | â |
| Hunt & Reffert | 2023 | 0.24 | 0.31 | 0.77 | 17 | 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 a moving group.