CWNU 207
0.15
UTI
0.0
CN
0.12
Cdens
0.5
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
22
Core radius and density
2.5 [pc], 0.6 [pc-2]
- CN 0.0 Sparse
- Cdens 0.12 Very loose
- CC3 0.5 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
CWNU 207 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and metallicity parameters (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 | 135.593 | -46.834 | 1.201 | -7.395 | 5.193 | 11.382 |
| Cavallo et al. | 2024 | 135.399 | -46.77 | 1.198 | â | â | â |
| Hunt & Reffert | 2023 | 135.758 | -46.863 | 1.183 | -7.413 | 5.21 | 52.235 |
| He et al. | 2022 | 135.637 | -46.855 | 1.2 | -7.49 | 5.15 | 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 | 0.88 | 0.84 | 1.49 | 7 | -0.217 | â | â | â |
| Liu et al. | 2025 | 1.24 | 0.40 | â | 12 | â | â | â | â |
| Cavallo et al. | 2024 | 0.96 | 0.87 | â | 3 | -0.030 | â | â | â |
| Hunt & Reffert | 2023 | 0.80 | 0.81 | 1.49 | 4 | â | â | â | â |
| He et al. | 2022 | 0.63 | 1.46 | â | 10 | -0.404 | â | â | â |
Liu et al. (2025)
Classified as primordial binary cluster 62 along with HSC_2144.
Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P10, along with HSC_2144.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD classes: 0.96 (50th percentile), true positive? (human-assigned).
Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.96 (50th percentile), true positive? (human-assigned).