Theia 398
0.18
UTI
0.27
CN
0.39
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
18.8 [arcmin]
- CN 0.27 Poorly populated
- Cdens 0.39 Loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 398 is a poorly populated, 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 low-mass, 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
Low mass
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 | 104.04 | -19.932 | 1.477 | -5.317 | 1.506 | 25.878 |
| Hunt & Reffert | 2024 | 104.135 | -19.922 | 1.494 | -5.327 | 1.519 | 22.678 |
| Cavallo et al. | 2024 | 103.987 | -19.738 | 1.491 | â | â | â |
| Hunt & Reffert | 2023 | 104.135 | -19.922 | 1.494 | -5.327 | 1.519 | 22.678 |
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 | 48* | â | â |
| Cavallo et al. | 2024 | 0.68 | 0.29 | â | 200 | 0.110 | â | â | â |
| Hunt & Reffert | 2023 | 0.65 | 0.11 | 0.68 | 129 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.