Theia 2103
0.19
UTI
0.26
CN
0.19
Cdens
0.5
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
1.0 [N/pc2]
- CN 0.26 Poorly populated
- Cdens 0.19 Very loose
- CC3 0.5 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 2103 is a poorly populated, very loose object of intermediate 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, 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 | 121.382 | -40.944 | 1.306 | -4.467 | 3.834 | 33.806 |
| Hunt & Reffert | 2024 | 121.385 | -40.943 | 1.311 | -4.471 | 3.824 | 31.18 |
| Cavallo et al. | 2024 | 121.271 | -40.812 | 1.312 | â | â | â |
| Hunt & Reffert | 2023 | 121.385 | -40.943 | 1.311 | -4.471 | 3.824 | 31.18 |
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 | 0.81 | 0.52 | 0.67 | 67 | 0.320 | 75 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 75(1) | â | â |
| Cavallo et al. | 2024 | 0.88 | 0.49 | â | 105 | 0.320 | â | â | â |
| Hunt & Reffert | 2023 | 0.74 | 0.55 | 0.67 | 29 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Part of multiple system G137, along with Theia_773, Theia_274, Theia_986, HSC_2082 and HSC_2085.
Cavallo et al. (2024)
Silver sample.