Theia 1256
0.15
UTI
0.0
CN
0.05
Cdens
0.62
CC3
0.03
Clit
1.0
Cdup
Nm (P>50%)
24
Core radius and density
2.6 [pc], 0.2 [pc-2]
- CN 0.0 Sparse
- Cdens 0.05 Very loose
- CC3 0.62 Intermediate 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 1256 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a relatively 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 | 97.68 | -21.315 | 1.0 | -2.151 | -0.832 | -4.732 |
| Cavallo et al. | 2024 | 97.495 | -21.34 | 1.021 | â | â | â |
| Hunt & Reffert | 2023 | 97.66 | -21.318 | 1.018 | -2.147 | -0.782 | 7.919 |
| Kounkel & Covey | 2019 | 97.677 | -20.908 | 1.347 | â | â | 14.025 |
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 | 0.93 | 0.26 | 1.01 | 479 | 0.050 | â | â | â |
| Cavallo et al. | 2024 | 0.95 | 0.56 | â | 479 | 0.050 | â | â | â |
| Hunt & Reffert | 2023 | 0.93 | 0.26 | 1.01 | 390 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.74 | 0.14 | â | 1016 | â | â | â | â |
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.34 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.34 (50th percentile).