Theia 771
0.45
UTI
0.55
CN
0.57
Cdens
0.62
CC3
0.25
Clit
1.0
Cdup
Radius (P>50% members)
18.3 [arcmin]
- CN 0.55 Moderately populated
- Cdens 0.57 Moderately dense
- CC3 0.62 Intermediate quality
- Clit 0.25 Poorly studied
- Cdup 1.0 Unique
Overview
Theia 771 is a moderately populated, moderately dense object of intermediate C3 quality. Its parallax locates it at a 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.
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 | 199.083 | -59.231 | 1.163 | -14.952 | -1.81 | -11.525 |
| Hu & Soubiran | 2025 | 199.533 | -59.201 | â | â | â | â |
| Hunt & Reffert | 2024 | 198.889 | -59.23 | 1.164 | -14.932 | -1.808 | -12.502 |
| Cavallo et al. | 2024 | 199.533 | -59.201 | 1.161 | â | â | â |
| Hunt & Reffert | 2023 | 198.889 | -59.23 | 1.164 | -14.932 | -1.808 | -12.502 |
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 | -0.140* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 50* | â | â |
| Cavallo et al. | 2024 | 0.78 | 0.47 | â | 525 | 0.640 | â | â | â |
| Hunt & Reffert | 2023 | 0.82 | 0.66 | 0.56 | 326 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.