Theia 1666
0.40
UTI
0.76
CN
0.74
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Radius (P>50% members)
6.8 [arcmin]
- CN 0.76 Rich
- Cdens 0.74 Moderately dense
- CC3 0.5 Intermediate quality
- Clit 0.0 Rarely studied
- Cdup 1.0 Unique
Overview
Theia 1666 is a rich, moderately dense object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a very massive, metal-poor, young cluster (see Parameters). It was recently reported in the literature.
Relatively close
High extinction
Very massive
Metal-poor
Young
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 274.236 | -15.855 | 0.342 | -0.491 | -2.192 | 39.552 |
| Hunt & Reffert | 2024 | 274.239 | -15.862 | 0.332 | -0.506 | -2.15 | 43.67 |
| Cavallo et al. | 2024 | 274.199 | -15.827 | 0.331 | â | â | â |
| Hunt & Reffert | 2023 | 274.239 | -15.862 | 0.332 | -0.506 | -2.15 | 43.67 |
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 | 7606* | â | â |
| Cavallo et al. | 2024 | 2.67 | 4.69 | â | 27 | -0.520 | â | â | â |
| Hunt & Reffert | 2023 | 2.70 | 3.46 | 3.15 | 87 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Wood sample.