Theia 2782
0.16
UTI
0.0
CN
0.06
Cdens
0.62
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
21
Core radius and density
2.4 [pc], 0.3 [pc-2]
- CN 0.0 Sparse
- Cdens 0.06 Very loose
- CC3 0.62 Intermediate quality
- Clit 0.06 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 2782 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (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 | 102.912 | 9.244 | 0.665 | -2.431 | -0.042 | â |
| Zhang et al. | 2024 | 102.971 | 9.236 | â | â | â | â |
| Hunt & Reffert | 2024 | 102.971 | 9.236 | 0.663 | -2.431 | -0.074 | â |
| Cavallo et al. | 2024 | 102.953 | 9.371 | 0.665 | â | â | â |
| Hunt & Reffert | 2023 | 102.971 | 9.236 | 0.663 | -2.431 | -0.074 | â |
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 | 1.4 | 0.53 | 0.75 | 191 | -0.119 | 131 | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.219(1) | â | â | â |
| Hunt & Reffert | 2024 | 1.40 | 0.53 | 0.75 | 191 | â | 131(1) | â | â |
| Cavallo et al. | 2024 | 1.64 | 0.84 | â | 32 | -0.020 | â | â | â |
| Hunt & Reffert | 2023 | 1.40 | 0.53 | 0.75 | 191 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P16, along with CWNU_2902.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).