CWNU 2918
0.16
UTI
0.27
CN
0.08
Cdens
0.25
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
27
Core radius and density
1.8 [pc], 0.4 [pc-2]
- CN 0.27 Poorly populated
- Cdens 0.08 Very loose
- CC3 0.25 Low 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 2918 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and age parameters (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 | 105.848 | -6.952 | 0.374 | -1.184 | 0.693 | â |
| Hunt & Reffert | 2024 | 105.841 | -6.957 | 0.37 | -1.169 | 0.672 | â |
| Cavallo et al. | 2024 | 105.868 | -6.979 | 0.37 | â | â | â |
| Hunt & Reffert | 2023 | 105.841 | -6.957 | 0.37 | -1.169 | 0.672 | â |
| He et al. | 2023 | 105.843 | -6.894 | 0.381 | -1.182 | 0.696 | 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 | 2.43 | 1.61 | 1.01 | 39 | -0.050 | 251 | â | â |
| Liu et al. | 2025 | 5.01 | 0.51 | â | 15 | â | â | â | â |
| Hunt & Reffert | 2024 | 2.43 | 1.61 | 1.01 | 39 | â | 251(1) | â | â |
| Cavallo et al. | 2024 | 2.32 | 1.11 | â | 380 | -0.050 | â | â | â |
| Hunt & Reffert | 2023 | 2.43 | 1.61 | 1.01 | 39 | â | â | â | â |
| He et al. | 2023 | 2.40 | 1.75 | â | 20 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as primordial binary cluster 106 along with CWNU_1445.
Palma et al. (2025)
Classified as optical pair P309, along with CWNU_1445.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).