Theia 1813
0.08
UTI
0.68
CN
1.0
Cdens
1.0
CC3
0.25
Clit
0.13
Cdup
Radius (P>50% members)
2.3 [arcmin]
- CN 0.68 Moderately populated
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 0.25 Poorly studied
- Cdup 0.13 Likely duplicate
Overview
Theia 1813 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by high extinction. It is catalogued as a massive, metal-poor, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (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.
Distant
High extinction
Massive
Metal-poor
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 264.34 | -33.842 | 0.244 | -0.889 | -2.067 | -4.184 |
| Hu & Soubiran | 2025 | 264.324 | -33.839 | â | â | â | â |
| Hunt & Reffert | 2024 | 264.338 | -33.838 | 0.255 | -0.883 | -2.075 | -5.053 |
| Cavallo et al. | 2024 | 264.324 | -33.839 | 0.254 | â | â | â |
| Hunt & Reffert | 2023 | 264.338 | -33.838 | 0.255 | -0.883 | -2.075 | -5.053 |
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 | -0.410* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 3928* | â | â |
| Cavallo et al. | 2024 | 6.14 | 4.44 | â | 631 | -1.220 | â | â | â |
| Hunt & Reffert | 2023 | 3.41 | 4.71 | 2.31 | 330 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.