Theia 828
0.17
UTI
0.0
CN
0.21
Cdens
0.62
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
1.1 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.21 Very loose
- CC3 0.62 Intermediate 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 828 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, young cluster (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 | 277.785 | -21.331 | 2.677 | 2.422 | -14.75 | -5.824 |
| Cavallo et al. | 2024 | 278.322 | -19.729 | 2.637 | â | â | â |
| Hunt & Reffert | 2023 | 277.651 | -21.715 | 2.632 | 2.482 | -14.479 | -1.132 |
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 | 0.36 | 1.455 | 1.49 | 64 | -0.580 | â | â | â |
| Cavallo et al. | 2024 | 0.36 | 1.79 | â | 45 | -0.580 | â | â | â |
| Hunt & Reffert | 2023 | 0.36 | 1.12 | 1.49 | 84 | â | â | â | â |
Palma et al. (2025)
Classified as optical pair P575, along with Theia_240.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.