Theia 269
0.13
UTI
0.0
CN
0.04
Cdens
0.5
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
23
Core radius and density
1.3 [pc], 0.2 [pc-2]
- CN 0.0 Sparse
- Cdens 0.04 Very loose
- CC3 0.5 Intermediate 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 269 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (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 | 314.304 | 16.665 | 1.191 | 2.018 | 2.047 | -11.808 |
| Zhang et al. | 2024 | 314.325 | 16.601 | â | â | â | â |
| Cavallo et al. | 2024 | 314.255 | 16.698 | 1.174 | â | â | â |
| Hunt & Reffert | 2023 | 314.325 | 16.601 | 1.151 | 1.989 | 1.982 | -13.173 |
| Kounkel & Covey | 2019 | 313.788 | 16.5 | 1.322 | â | â | 12.537 |
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 | 0.8 | 0.15 | 0.42 | 156 | -0.025 | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.270(1) | â | â | â |
| Cavallo et al. | 2024 | 0.85 | 0.15 | â | 389 | 0.220 | â | â | â |
| Hunt & Reffert | 2023 | 0.80 | 0.15 | 0.42 | 156 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.76 | 0.30 | â | 84 | 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 moving group. CMD classes: 0.99 (50th percentile), true positive (human-assigned).
Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.99 (50th percentile), true positive (human-assigned).