Theia 834
0.18
UTI
0.37
CN
0.3
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
36.0 [arcmin]
- CN 0.37 Poorly populated
- Cdens 0.3 Loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 834 is a poorly populated, loose object of low C3 quality. Its parallax locates it at a very close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, 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: 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.
Very 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 | 96.481 | 29.865 | 2.119 | -6.585 | -3.966 | 4.681 |
| Zhang et al. | 2024 | 96.638 | 29.887 | â | â | â | â |
| Cavallo et al. | 2024 | 96.385 | 29.702 | 2.103 | â | â | â |
| Hunt & Reffert | 2023 | 96.638 | 29.887 | 2.104 | -6.616 | -3.928 | 5.562 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Zhang et al. | 2024 | â | â | â | â | -0.004* | â | â | â |
| Cavallo et al. | 2024 | 0.49 | 0.41 | â | 269 | 0.380 | â | â | â |
| Hunt & Reffert | 2023 | 0.45 | 0.22 | 0.50 | 218 | 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.