CWNU 336
0.24
UTI
0.31
CN
0.26
Cdens
0.38
CC3
0.13
Clit
1.0
Cdup
Nm (P>50%)
31
Core radius and density
1.1 [pc], 1.3 [pc-2]
- CN 0.31 Poorly populated
- Cdens 0.26 Loose
- CC3 0.38 Low quality
- Clit 0.13 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 336 is a poorly populated, loose object of low C3 quality. Its parallax locates it at a relatively close distance, above 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 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 | 308.422 | 47.112 | 0.665 | -0.897 | -1.875 | -17.319 |
| Hu & Soubiran | 2025 | 308.4 | 47.104 | â | â | â | â |
| Hunt & Reffert | 2024 | 308.324 | 47.089 | 0.675 | -0.92 | -1.868 | -17.314 |
| Cavallo et al. | 2024 | 308.4 | 47.104 | 0.673 | â | â | â |
| Hunt & Reffert | 2023 | 308.324 | 47.089 | 0.675 | -0.92 | -1.868 | -17.314 |
| He et al. | 2022 | 308.452 | 47.08 | 0.66 | -0.88 | -1.87 | -14.4 |
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 | 1.57 | 1.17 | 0.63 | 437 | 0.265 | 100 | â | â |
| Liu et al. | 2025 | 3.13 | 0.60 | â | 83 | â | â | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.100(5) | â | â | â |
| Hunt & Reffert | 2024 | 1.41 | 1.17 | 0.63 | 437 | â | 100(1) | â | â |
| Cavallo et al. | 2024 | 1.57 | 1.12 | â | 813 | 0.330 | â | â | â |
| Hunt & Reffert | 2023 | 1.41 | 1.17 | 0.63 | 437 | â | â | â | â |
| He et al. | 2022 | 1.95 | 1.77 | â | 398 | 0.265 | 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 67 along with FoF_2253.
Palma et al. (2025)
Classified as optical pair P253, along with FoF_2253.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.89 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.89 (50th percentile).