Theia 990
0.09
UTI
0.0
CN
0.06
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
31.9 [arcmin]
- CN 0.0 Sparse
- Cdens 0.06 Very loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 990 is a sparse, very loose object of low C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, metal-rich, intermediate-age cluster (see Parameters). It was recently reported in the literature.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Close
Moderate extinction
Low mass
Metal-rich
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 324.174 | 57.512 | 1.101 | 1.005 | -2.171 | -27.602 |
| Hunt & Reffert | 2024 | 324.11 | 57.567 | 1.133 | 1.023 | -2.271 | -24.977 |
| Cavallo et al. | 2024 | 324.449 | 57.432 | 1.129 | â | â | â |
| Hunt & Reffert | 2023 | 324.11 | 57.567 | 1.133 | 1.023 | -2.271 | -24.977 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Hunt & Reffert | 2024 | â | â | â | â | â | 42* | â | â |
| Cavallo et al. | 2024 | 0.95 | 1.30 | â | 209 | 0.570 | â | â | â |
| Hunt & Reffert | 2023 | 0.81 | 1.52 | 2.17 | 114 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.