Theia 291
0.08
UTI
0.0
CN
0.15
Cdens
0.25
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
16.7 [arcmin]
- CN 0.0 Sparse
- Cdens 0.15 Very loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 291 is a sparse, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, near-solar metallicity, 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.
Relatively close
Moderate extinction
Low mass
Near-solar metallicity
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 287.27 | -7.715 | 0.911 | -0.229 | -4.647 | 15.086 |
| Hunt & Reffert | 2024 | 287.172 | -7.653 | 0.92 | -0.24 | -4.691 | -10.27 |
| Cavallo et al. | 2024 | 287.18 | -8.371 | 0.922 | â | â | â |
| Hunt & Reffert | 2023 | 287.172 | -7.653 | 0.92 | -0.24 | -4.691 | -10.27 |
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 | 45* | â | â |
| Cavallo et al. | 2024 | 1.05 | 1.32 | â | 51 | 0.060 | â | â | â |
| Hunt & Reffert | 2023 | 1.01 | 0.95 | 0.75 | 57 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.