CWNU 509
0.28
UTI
0.26
CN
0.13
Cdens
0.5
CC3
0.25
Clit
1.0
Cdup
Radius (P>50% members)
22.6 [arcmin]
- CN 0.26 Poorly populated
- Cdens 0.13 Very loose
- CC3 0.5 Intermediate quality
- Clit 0.25 Poorly studied
- Cdup 1.0 Unique
Overview
CWNU 509 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, above 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 poorly studied in the literature.
Note: This object shares a moderate percentage of members with at least one entry reported in the same catalogue. See table with shared members information.
Close
Low extinction
Near-solar metallicity
Intermediate age
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | â | 133.934 | -25.675 | 1.043 | -6.429 | 2.711 | 9.943 |
| Hu & Soubiran | 2025 | 133.907 | -25.627 | â | â | â | â |
| Cavallo et al. | 2024 | 133.907 | -25.627 | 1.038 | â | â | â |
| Hunt & Reffert | 2023 | 133.968 | -25.541 | 1.037 | -6.406 | 2.763 | 10.398 |
| He et al. | 2022 | 133.892 | -25.954 | 1.05 | -6.47 | 2.71 | 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] | Bfr | BSS |
|---|---|---|---|---|---|---|---|---|---|
| Hu & Soubiran | 2025 | â | â | â | â | -0.240* | â | â | â |
| Cavallo et al. | 2024 | 0.92 | 0.55 | â | 1047 | 0.070 | â | â | â |
| Hunt & Reffert | 2023 | 0.93 | 0.20 | 0.80 | 875 | â | â | â | â |
| He et al. | 2022 | 1.48 | 0.24 | â | 3 | -2.028 | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as a moving group.