CWNU 399
0.19
UTI
0.3
CN
0.18
Cdens
0.25
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
30
Core radius and density
1.7 [pc], 0.9 [pc-2]
- CN 0.3 Poorly populated
- Cdens 0.18 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 399 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a relatively close distance, below 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 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 | 125.084 | -43.148 | 0.822 | -2.411 | 4.904 | 2.639 |
| Hunt & Reffert | 2024 | 125.076 | -43.21 | 0.821 | -2.408 | 4.903 | 9.7 |
| Cavallo et al. | 2024 | 125.118 | -43.136 | 0.824 | â | â | â |
| Hunt & Reffert | 2023 | 125.076 | -43.21 | 0.821 | -2.408 | 4.903 | 9.7 |
| He et al. | 2022 | 125.075 | -43.2 | 0.816 | -2.404 | 4.898 | â |
| He et al. | 2022 | 125.131 | -43.163 | 0.82 | -2.42 | 4.9 | 12.3 |
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 | 1.2 | 1.57 | 2.14 | 32 | -0.470 | 150 | â | â |
| Hunt & Reffert | 2024 | 1.18 | 1.57 | 2.14 | 40 | â | 150(1) | â | â |
| Cavallo et al. | 2024 | 1.22 | 2.06 | â | 20 | -0.060 | â | â | â |
| Hunt & Reffert | 2023 | 1.18 | 1.57 | 2.14 | 40 | â | â | â | â |
| He et al. | 2022 | â | 2.45 | â | 32 | â | â | â | â |
| He et al. | 2022 | 1.70 | 1.46 | â | 2 | -0.881 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Part of multiple system G63, along with Theia_1890 and HXHWL_68.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.84 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.84 (50th percentile).