Theia 2166
0.05
UTI
0.28
CN
0.86
Cdens
0.75
CC3
0.25
Clit
0.11
Cdup
Radius (P>50% members)
5.0 [arcmin]
- CN 0.28 Poorly populated
- Cdens 0.86 Dense
- CC3 0.75 High quality
- Clit 0.25 Poorly studied
- Cdup 0.11 Likely duplicate
Overview
Theia 2166 is a poorly populated, dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.
â ī¸ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.
Relatively close
Moderate 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 | 217.025 | -61.352 | 0.572 | -4.395 | -1.923 | -39.935 |
| Hu & Soubiran | 2025 | 217.086 | -61.359 | â | â | â | â |
| Hunt & Reffert | 2024 | 216.985 | -61.364 | 0.57 | -4.443 | -1.948 | -40.28 |
| Cavallo et al. | 2024 | 217.086 | -61.36 | 0.571 | â | â | â |
| Hunt & Reffert | 2023 | 216.985 | -61.364 | 0.57 | -4.443 | -1.948 | -40.28 |
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 | -0.270* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 161* | â | â |
| Cavallo et al. | 2024 | 1.45 | 1.72 | â | 891 | -0.300 | â | â | â |
| Hunt & Reffert | 2023 | 1.66 | 1.58 | 0.64 | 700 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.