Theia 900
0.42
UTI
0.31
CN
0.52
Cdens
0.62
CC3
0.31
Clit
1.0
Cdup
Radius (P>50% members)
13.1 [arcmin]
- CN 0.31 Poorly populated
- Cdens 0.52 Moderately dense
- CC3 0.62 Intermediate quality
- Clit 0.31 Poorly studied
- Cdup 1.0 Unique
Overview
Theia 900 is a poorly populated, moderately dense object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is poorly studied in the literature.
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 | 37.306 | 59.141 | 1.108 | 3.578 | -2.873 | -8.135 |
| Hu & Soubiran | 2025 | 37.288 | 59.094 | â | â | â | â |
| Hunt & Reffert | 2024 | 37.625 | 59.052 | 1.109 | 3.563 | -2.874 | -10.189 |
| Cavallo et al. | 2024 | 37.288 | 59.094 | 1.118 | â | â | â |
| Hunt & Reffert | 2023 | 37.625 | 59.052 | 1.109 | 3.563 | -2.874 | -10.189 |
| He et al. | 2022 | 37.237 | 59.308 | 1.106 | 3.539 | -2.826 | 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 |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | -0.080* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 93* | â | â |
| Cavallo et al. | 2024 | 0.85 | 1.71 | â | 537 | -0.100 | â | â | â |
| Hunt & Reffert | 2023 | 0.85 | 1.48 | 1.55 | 333 | â | â | â | â |
| He et al. | 2022 | â | 2.10 | â | 282 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.