Theia 1854
0.20
UTI
0.0
CN
0.25
Cdens
0.75
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
8.2 [arcmin]
- CN 0.0 Sparse
- Cdens 0.25 Loose
- CC3 0.75 High quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 1854 is a sparse, loose object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, 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.
Relatively close
Moderate extinction
Metal-poor
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 269.318 | -20.248 | 0.669 | -1.562 | -3.033 | -9.062 |
| Hunt & Reffert | 2024 | 269.238 | -20.314 | 0.678 | -1.577 | -3.089 | -8.387 |
| Cavallo et al. | 2024 | 269.341 | -20.286 | 0.675 | â | â | â |
| Hunt & Reffert | 2023 | 269.238 | -20.314 | 0.678 | -1.577 | -3.089 | -8.387 |
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 | 166* | â | â |
| Cavallo et al. | 2024 | 0.92 | 2.90 | â | 138 | -0.780 | â | â | â |
| Hunt & Reffert | 2023 | 1.42 | 2.33 | 1.53 | 126 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Silver sample.