Theia 149
0.04
UTI
0.0
CN
0.1
Cdens
0.12
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.5 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.1 Very loose
- CC3 0.12 Very low quality
- Clit 0.0 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 149 is a sparse, very loose object of very 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, 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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 139.89 | -50.614 | 1.662 | -11.046 | 8.599 | 10.768 |
| Cavallo et al. | 2024 | 140.602 | -51.161 | 1.656 | â | â | â |
| Hunt & Reffert | 2023 | 139.803 | -50.416 | 1.658 | -11.145 | 8.472 | 7.67 |
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] | Bfrac | BSS |
|---|---|---|---|---|---|---|---|---|---|
| UCC | 99999â | 0.59 | 0.11 | 0.41 | 100 | -0.280 | â | â | â |
| Liu et al. | 2025 | 0.59 | 0.05 | â | 148 | â | â | â | â |
| Cavallo et al. | 2024 | 0.59 | 0.60 | â | 100 | -0.280 | â | â | â |
| Hunt & Reffert | 2023 | 0.57 | 0.11 | 0.41 | 92 | â | â | â | â |
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 223 along with HSC_2244.
Palma et al. (2025)
Classified as genetic pair P225, along with HSC_2244.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.