Theia 540
- CN 0.0 Sparse
- Cdens 0.06 Very loose
- CC3 0.75 High quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 540 is a sparse, very loose object of high C3 quality. Its parallax locates it at a very close distance, above the mid-plane. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature. Note: This object shares a moderate percentage of members with at least one entry reported in the same catalogue. See table with shared members information.
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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | – | 296.618 | 39.822 | 2.111 | 1.47 | -0.647 | -9.896 |
| He et al. | 2022 | 296.567 | 39.759 | 2.127 | 1.598 | -0.582 | – |
💡 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 |
|---|---|---|---|---|---|---|---|---|---|
| He et al. | 2022 | – | 0.85 | – | 794 | – | – | – | – |
💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
