Theia 1203
0.12
UTI
0.25
CN
0.05
Cdens
0.25
CC3
0.03
Clit
1.0
Cdup
Nm (P>50%)
25
Core radius and density
2.4 [pc], 0.2 [pc-2]
- CN 0.25 Poorly populated
- Cdens 0.05 Very loose
- CC3 0.25 Low quality
- Clit 0.03 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 1203 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied 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 | 281.101 | -57.38 | 2.416 | 5.645 | -24.918 | -21.367 |
| Cavallo et al. | 2024 | 282.278 | -56.888 | 2.454 | â | â | â |
| Hunt & Reffert | 2023 | 281.015 | -57.178 | 2.443 | 5.64 | -24.905 | -22.844 |
| Kounkel & Covey | 2019 | 282.156 | -57.339 | 2.459 | â | â | -16.685 |
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 | 0.41 | 0.24 | 0.73 | 279 | 0.360 | â | â | â |
| Cavallo et al. | 2024 | 0.42 | 0.41 | â | 200 | 0.360 | â | â | â |
| Hunt & Reffert | 2023 | 0.39 | 0.19 | 0.73 | 279 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.41 | 0.24 | â | 1200 | â | â | â | â |
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.73 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.73 (50th percentile).