Theia 1023
0.15
UTI
0.27
CN
0.34
Cdens
0.12
CC3
0.0
Clit
1.0
Cdup
Stellar density (N50/rad)
1.7 [N/pc2]
- CN 0.27 Poorly populated
- Cdens 0.34 Loose
- CC3 0.12 Very low 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 1023 is a poorly populated, loose object of very low C3 quality. Its parallax locates it at a very close distance, near 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.
Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
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 | 267.698 | -40.795 | 2.248 | 4.712 | -6.447 | -24.167 |
| Hunt & Reffert | 2024 | 267.899 | -40.694 | 2.235 | 4.444 | -6.672 | -21.732 |
| Cavallo et al. | 2024 | 267.261 | -41.12 | 2.232 | â | â | â |
| Hunt & Reffert | 2023 | 267.899 | -40.694 | 2.235 | 4.444 | -6.672 | -21.732 |
| Kounkel & Covey | 2019 | 268.175 | -39.926 | 2.149 | â | â | -15.682 |
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 | 0.44 | 0.36 | 1.32 | 148 | 0.170 | 66 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 66(1) | â | â |
| Cavallo et al. | 2024 | 0.44 | 0.68 | â | 148 | 0.170 | â | â | â |
| Hunt & Reffert | 2023 | 0.42 | 0.36 | 1.32 | 116 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.47 | 0.30 | â | 780 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.80 (50th percentile).