Theia 659
0.16
UTI
0.0
CN
0.41
Cdens
0.38
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
16.3 [arcmin]
- CN 0.0 Sparse
- Cdens 0.41 Loose
- CC3 0.38 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 659 is a sparse, loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, metal-poor, young 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-poor
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 253.503 | -42.594 | 1.477 | -0.322 | -7.613 | -30.598 |
| Hunt & Reffert | 2024 | 253.376 | -42.589 | 1.47 | -0.296 | -7.535 | -32.431 |
| Cavallo et al. | 2024 | 253.652 | -42.455 | 1.469 | â | â | â |
| Hunt & Reffert | 2023 | 253.376 | -42.589 | 1.47 | -0.296 | -7.535 | -32.431 |
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 | 49* | â | â |
| Cavallo et al. | 2024 | 0.62 | 1.46 | â | 58 | -0.660 | â | â | â |
| Hunt & Reffert | 2023 | 0.64 | 0.85 | 1.12 | 133 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.