Theia 171
0.19
UTI
0.26
CN
0.17
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
37.8 [arcmin]
- CN 0.26 Poorly populated
- Cdens 0.17 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 171 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a metal-rich, intermediate-age cluster, but with a large variance across recent sources for the absorption parameter (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
Metal-rich
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 292.37 | 32.072 | 1.96 | 5.337 | 4.629 | -16.843 |
| Cavallo et al. | 2024 | 292.404 | 31.621 | 1.912 | â | â | â |
| Hunt & Reffert | 2023 | 293.081 | 31.995 | 1.91 | 5.326 | 4.535 | -22.095 |
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 |
|---|---|---|---|---|---|---|---|---|---|
| Cavallo et al. | 2024 | 0.56 | 0.00 | â | 68 | 0.730 | â | â | â |
| Hunt & Reffert | 2023 | 0.50 | 0.14 | 0.89 | 137 | â | â | â | â |
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.