HSC 1691
0.33
UTI
0.4
CN
0.5
Cdens
0.25
CC3
0.25
Clit
1.0
Cdup
Radius (P>50% members)
11.0 [arcmin]
- CN 0.4 Poorly populated
- Cdens 0.5 Moderately dense
- CC3 0.25 Low quality
- Clit 0.25 Poorly studied
- Cdup 1.0 Unique
Overview
HSC 1691 is a poorly populated, moderately dense object of low C3 quality. Its parallax locates it at a relatively close distance, above 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.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
Relatively close
Low extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 106.053 | -0.009 | 0.797 | -0.068 | -1.829 | 1.314 |
| Hu & Soubiran | 2025 | 106.039 | -0.074 | â | â | â | â |
| Hunt & Reffert | 2024 | 106.077 | 0.035 | 0.776 | -0.062 | -1.805 | -2.061 |
| Cavallo et al. | 2024 | 106.039 | -0.074 | 0.781 | â | â | â |
| Hunt & Reffert | 2023 | 106.077 | 0.035 | 0.776 | -0.062 | -1.805 | -2.061 |
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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | -0.070* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 150* | â | â |
| Cavallo et al. | 2024 | 1.32 | 0.53 | â | 537 | 0.450 | â | â | â |
| Hunt & Reffert | 2023 | 1.18 | 0.71 | 0.63 | 238 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.