Theia 665
0.18
UTI
0.27
CN
0.13
Cdens
0.38
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
27
Core radius and density
0.7 [pc], 0.7 [pc-2]
- CN 0.27 Poorly populated
- Cdens 0.13 Very loose
- CC3 0.38 Low quality
- Clit 0.06 Rarely studied
- Cdup 1.0 Unique
đĨ Members
đ Colab
đŦ Bayestar19
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
MOCA
đ CDS
đ Simbad
đ CDS (Îą, δ)
đ Simbad (Îą, δ)
Overview
Theia 665 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied 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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 120.625 | -32.215 | 1.291 | -3.792 | 3.666 | 14.411 |
| Hunt & Reffert | 2024 | 120.695 | -32.273 | 1.284 | -3.823 | 3.68 | 16.547 |
| Cavallo et al. | 2024 | 120.642 | -32.32 | 1.282 | â | â | â |
| Hunt & Reffert | 2023 | 120.695 | -32.273 | 1.284 | -3.823 | 3.68 | 16.547 |
| Kounkel & Covey | 2019 | 120.723 | -32.506 | 1.266 | â | â | 14.336 |
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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 0.75 | 0.33 | 0.62 | 273 | 0.300 | 87 | â | â |
| Hunt & Reffert | 2024 | 0.73 | 0.20 | 0.62 | 275 | â | 87(1) | â | â |
| Cavallo et al. | 2024 | 0.77 | 0.46 | â | 148 | 0.300 | â | â | â |
| Hunt & Reffert | 2023 | 0.73 | 0.20 | 0.62 | 275 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.79 | 0.58 | â | 271 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).