CWWL 1991
- CN 0.0 Sparse
- Cdens 0.03 Very loose
- CC3 0.25 Low quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
CWWL 1991 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane. It is catalogued as a very metal-poor, old cluster (see Parameters). It was recently reported in the literature. 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 | – | 90.654 | 27.285 | 0.247 | 0.38 | -1.291 | 27.257 |
| Chi et al. | 2023 | 90.7 | 27.281 | 0.253 | 0.363 | -1.286 | – |
💡 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 |
|---|---|---|---|---|---|---|---|---|---|
| Chi et al. | 2023 | – | – | – | 2300 | -1.335 | – | – | – |
💡 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.
