CWNU 1818
0.25
UTI
0.0
CN
0.23
Cdens
0.5
CC3
0.25
Clit
1.0
Cdup
Stellar density (N50/rad)
1.2 [N/pc2]
- CN 0.0 Sparse
- Cdens 0.23 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.25 Poorly 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 1818 is a sparse, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate 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.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 316.227 | 47.717 | 0.573 | -2.697 | -3.582 | â |
| Hunt & Reffert | 2024 | 316.268 | 47.687 | 0.575 | -2.683 | -3.607 | â |
| Cavallo et al. | 2024 | 316.253 | 47.717 | 0.574 | â | â | â |
| Hunt & Reffert | 2023 | 316.268 | 47.687 | 0.575 | -2.683 | -3.607 | â |
| He et al. | 2023 | 316.33 | 47.724 | 0.576 | -2.703 | -3.564 | 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 | 1.7 | 2.05 | 0.72 | 191 | -0.230 | 126 | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 126(1) | â | â |
| Cavallo et al. | 2024 | 1.77 | 2.05 | â | 191 | -0.230 | â | â | â |
| Hunt & Reffert | 2023 | 1.70 | 2.04 | 0.72 | 272 | â | â | â | â |
| He et al. | 2023 | 1.70 | 2.15 | â | 28 | 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 optical pair P331, along with Theia_3457.
Cavallo et al. (2024)
Gold sample.