Theia 1873
0.19
UTI
0.0
CN
0.19
Cdens
0.75
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
0.9 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.19 Very loose
- CC3 0.75 High 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 1873 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age 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 | 206.598 | -62.491 | 0.805 | -3.69 | -2.58 | -7.04 |
| Cavallo et al. | 2024 | 206.68 | -62.522 | 0.8 | â | â | â |
| Hunt & Reffert | 2023 | 206.582 | -62.688 | 0.802 | -3.697 | -2.568 | -4.111 |
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 | 1.205 | 0.305 | 0.73 | 182 | 0.230 | â | â | â |
| Cavallo et al. | 2024 | 1.20 | 0.19 | â | 191 | 0.230 | â | â | â |
| Hunt & Reffert | 2023 | 1.21 | 0.42 | 0.73 | 172 | â | â | â | â |
Palma et al. (2025)
Classified as optical pair P537, along with HXHWL_34.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.