Theia 888
0.10
UTI
0.0
CN
0.11
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
24.4 [arcmin]
- CN 0.0 Sparse
- Cdens 0.11 Very loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 888 is a sparse, very loose object of low C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, 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
Low 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 | 355.833 | 55.945 | 1.086 | -6.602 | -2.467 | -27.859 |
| Hu & Soubiran | 2025 | 356.216 | 55.976 | â | â | â | â |
| Cavallo et al. | 2024 | 356.216 | 55.976 | 1.078 | â | â | â |
| Hunt & Reffert | 2023 | 355.581 | 55.944 | 1.082 | -6.51 | -2.423 | -29.091 |
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 | -0.140* | â | â | â |
| Cavallo et al. | 2024 | 0.92 | 0.73 | â | 741 | -0.160 | â | â | â |
| Hunt & Reffert | 2023 | 0.91 | 0.39 | 0.35 | 426 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.