CWNU 121
0.23
UTI
0.0
CN
0.22
Cdens
0.75
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
24
Core radius and density
1.4 [pc], 1.1 [pc-2]
- CN 0.0 Sparse
- Cdens 0.22 Very loose
- CC3 0.75 High 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 121 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (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 | 203.656 | -66.556 | 0.745 | -5.405 | -0.766 | -12.608 |
| Hu & Soubiran | 2025 | 203.603 | -66.542 | â | â | â | â |
| Hunt & Reffert | 2024 | 203.655 | -66.549 | 0.74 | -5.401 | -0.815 | -6.246 |
| Cavallo et al. | 2024 | 203.603 | -66.542 | 0.743 | â | â | â |
| Hunt & Reffert | 2023 | 203.655 | -66.549 | 0.74 | -5.401 | -0.815 | -6.246 |
| He et al. | 2022 | 203.695 | -66.561 | 0.79 | -5.43 | -0.8 | 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 | 1.29 | 0.72 | 0.79 | 263 | 0.260 | 104 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.220(5) | â | â | â |
| Hunt & Reffert | 2024 | 1.29 | 0.74 | 0.79 | 263 | â | 104(1) | â | â |
| Cavallo et al. | 2024 | 1.24 | 0.46 | â | 708 | 0.260 | â | â | â |
| Hunt & Reffert | 2023 | 1.29 | 0.74 | 0.79 | 263 | â | â | â | â |
| He et al. | 2022 | 1.45 | 0.70 | â | 251 | 0.420 | 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: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).