CWNU 1860
0.23
UTI
0.31
CN
0.14
Cdens
0.5
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
31
Core radius and density
2.0 [pc], 0.7 [pc-2]
- CN 0.31 Poorly populated
- Cdens 0.14 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.1 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 1860 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity 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 | 341.15 | 57.041 | 0.369 | -4.285 | -3.072 | -45.422 |
| Hu & Soubiran | 2025 | 341.159 | 57.053 | â | â | â | â |
| Hunt & Reffert | 2024 | 341.138 | 57.053 | 0.366 | -4.29 | -3.07 | -45.381 |
| Cavallo et al. | 2024 | 341.159 | 57.053 | 0.366 | â | â | â |
| Hunt & Reffert | 2023 | 341.138 | 57.053 | 0.366 | -4.29 | -3.07 | -45.381 |
| He et al. | 2023 | 341.182 | 57.062 | 0.372 | -4.274 | -3.056 | -45.42 |
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 | 2.685 | 1.29 | 0.43 | 1010 | 0.245 | 182 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.030(5) | â | â | â |
| Hunt & Reffert | 2024 | 2.74 | 1.29 | 0.43 | 1109 | â | 182(1) | â | â |
| Cavallo et al. | 2024 | 2.42 | 1.24 | â | 912 | 0.520 | â | â | â |
| Hunt & Reffert | 2023 | 2.74 | 1.29 | 0.43 | 1109 | â | â | â | â |
| He et al. | 2023 | 2.63 | 1.80 | â | 631 | 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: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).