Theia 1871
0.11
UTI
0.39
CN
1.0
Cdens
0.75
CC3
0.25
Clit
0.2
Cdup
Stellar density (N50/rad)
5.0 [N/pc2]
- CN 0.39 Poorly populated
- Cdens 1.0 Very dense
- CC3 0.75 High quality
- Clit 0.25 Poorly studied
- Cdup 0.2 Likely duplicate
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 1871 is a poorly populated, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a metal-poor, young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It was recently reported in the literature.
â ī¸ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 273.52 | -19.011 | 0.334 | -0.391 | -1.194 | -6.44 |
| Hunt & Reffert | 2024 | 273.555 | -18.985 | 0.333 | -0.385 | -1.206 | -35.903 |
| Cavallo et al. | 2024 | 273.508 | -19.019 | 0.332 | â | â | â |
| Hunt & Reffert | 2023 | 273.555 | -18.985 | 0.333 | -0.385 | -1.206 | -35.903 |
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 | 2.75 | 1.7 | 1.94 | 98 | -0.520 | 674 | â | â |
| Liu et al. | 2025 | 3.65 | 0.47 | â | 479 | â | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 674(1) | â | â |
| Cavallo et al. | 2024 | 1.65 | 2.05 | â | 78 | -0.520 | â | â | â |
| Hunt & Reffert | 2023 | 2.75 | 1.70 | 1.94 | 98 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 358 along with UBC_1008.
Palma et al. (2025)
Part of multiple system G119, along with HSC_155 and UBC_1008.
Cavallo et al. (2024)
Gold sample.