Theia 652
0.12
UTI
0.0
CN
0.06
Cdens
0.5
CC3
0.03
Clit
1.0
Cdup
Nm (P>50%)
22
Core radius and density
2.6 [pc], 0.3 [pc-2]
- CN 0.0 Sparse
- Cdens 0.06 Very loose
- CC3 0.5 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 652 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young 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 | 56.588 | 68.947 | 1.302 | 0.327 | -1.263 | -27.749 |
| Cavallo et al. | 2024 | 56.712 | 68.963 | 1.302 | â | â | â |
| Hunt & Reffert | 2023 | 57.497 | 68.713 | 1.303 | 0.192 | -1.229 | -24.115 |
| Kounkel & Covey | 2019 | 55.187 | 68.888 | 1.426 | â | â | -17.952 |
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 | 0.73 | 1.19 | 0.45 | 99 | 0.300 | â | â | â |
| Cavallo et al. | 2024 | 0.78 | 1.42 | â | 93 | 0.300 | â | â | â |
| Hunt & Reffert | 2023 | 0.73 | 1.19 | 0.45 | 99 | â | â | â | â |
| Kounkel & Covey | 2019 | 0.70 | 0.61 | â | 263 | â | â | â | â |
Palma et al. (2025)
Classified as optical pair P585, along with UPK_294.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).