UBC 647
0.50
UTI
0.27
CN
0.28
Cdens
0.75
CC3
0.6
Clit
1.0
Cdup
Radius (P>50% members)
10.5 [arcmin]
- CN 0.27 Poorly populated
- Cdens 0.28 Loose
- CC3 0.75 High quality
- Clit 0.6 Moderately studied
- Cdup 1.0 Unique
Overview
UBC 647 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a relatively close distance, below 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 is moderately studied in the literature.
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 | 116.62 | -48.209 | 0.697 | -2.146 | 1.714 | -0.862 |
| Li et al. | 2025 | 116.643 | -48.192 | 0.643 | -2.243 | 1.694 | â |
| Hu & Soubiran | 2025 | 116.485 | -48.213 | â | â | â | â |
| Almeida et al. | 2025 | 116.638 | -48.243 | â | â | â | â |
| Hunt & Reffert | 2024 | 116.413 | -48.275 | 0.717 | -2.096 | 1.739 | 9.023 |
| Cavallo et al. | 2024 | 116.485 | -48.213 | 0.717 | â | â | â |
| Hunt & Reffert | 2023 | 116.413 | -48.275 | 0.717 | -2.096 | 1.739 | 9.023 |
| Tarricq et al. | 2022 | 116.704 | -48.178 | 0.715 | -2.175 | 1.69 | â |
| Dias et al. | 2021 | 116.638 | -48.243 | 0.65 | -2.228 | 1.672 | â |
| Cantat-Gaudin et al. | 2020 | 116.643 | -48.192 | 0.643 | -2.243 | 1.694 | â |
| Castro-Ginard et al. | 2020 | 116.637 | -48.206 | 0.648 | -2.229 | 1.679 | â |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Li et al. | 2025 | 1.22 | 0.40 | â | 990 | -0.162 | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.350* | â | â | â |
| Almeida et al. | 2025 | 1.51 | 0.61 | â | 764 | â | 48 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 76* | â | â |
| Cavallo et al. | 2024 | 1.34 | 0.29 | â | 871 | 0.280 | â | â | â |
| Hunt & Reffert | 2023 | 1.33 | 0.15 | 0.34 | 824 | â | â | â | â |
| Tarricq et al. | 2022 | 1.44 | â | â | 891 | â | â | â | â |
| Dias et al. | 2021 | 1.51 | 0.61 | â | 764 | -0.172 | â | â | â |
| Cantat-Gaudin et al. | 2020 | 1.49 | 0.27 | â | 891 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Almeida et al. (2025)
Mass determination: worst fit. Isochrone match: good fit.
Cavallo et al. (2024)
Gold sample.