HSC 1765
0.28
UTI
0.38
CN
0.2
Cdens
0.75
CC3
0.06
Clit
0.97
Cdup
Stellar density (N50/rad)
1.0 [N/pc2]
- CN 0.38 Poorly populated
- Cdens 0.2 Very loose
- CC3 0.75 High quality
- Clit 0.06 Rarely studied
- Cdup 0.97 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 1765 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It was recently reported in the literature.
Note: This is a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 87.561 | -18.777 | 5.237 | -7.435 | 8.088 | 16.686 |
| Swiggum et al. | 2024 | 89.261 | -18.752 | 5.247 | -7.376 | 8.293 | 16.686 |
| Cavallo et al. | 2024 | 87.578 | -18.931 | 5.244 | â | â | â |
| Hunt & Reffert | 2023 | 89.261 | -18.752 | 5.247 | -7.376 | 8.293 | 14.507 |
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 | 0.195 | 0.08 | 0.39 | 40 | 0.130 | 24 | â | â |
| Liu et al. | 2025 | 0.20 | 0.04 | â | 40 | â | â | â | â |
| Swiggum et al. | 2024 | 0.19 | â | â | 39 | â | 24 | â | â |
| Cavallo et al. | 2024 | 0.19 | 0.59 | â | 43 | 0.130 | â | â | â |
| Hunt & Reffert | 2023 | 0.20 | 0.08 | 0.39 | 39 | â | â | â | â |
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 203 along with HSC_1714.
Palma et al. (2025)
Classified as optical pair P441, along with HSC_1746.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).