CWNU 1857
0.47
UTI
0.32
CN
0.63
Cdens
0.75
CC3
0.31
Clit
1.0
Cdup
Radius (P>50% members)
7.3 [arcmin]
- CN 0.32 Poorly populated
- Cdens 0.63 Moderately dense
- CC3 0.75 High quality
- Clit 0.31 Poorly studied
- Cdup 1.0 Unique
Overview
CWNU 1857 is a poorly populated, moderately dense object of high C3 quality. Its parallax locates it at a relatively close distance, near 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 metallicity parameter (see Parameters). It was recently reported in the literature.
Relatively close
Moderate 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 | 281.934 | -6.167 | 0.667 | -1.827 | 1.701 | -0.764 |
| Hu & Soubiran | 2025 | 281.98 | -6.137 | â | â | â | â |
| Hunt & Reffert | 2024 | 281.963 | -6.076 | 0.662 | -1.806 | 1.711 | -0.685 |
| Cavallo et al. | 2024 | 281.98 | -6.137 | 0.665 | â | â | â |
| Hunt & Reffert | 2023 | 281.963 | -6.076 | 0.662 | -1.806 | 1.711 | -0.685 |
| He et al. | 2023 | 281.927 | -6.222 | 0.667 | -1.827 | 1.689 | -0.76 |
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 | -0.130* | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 310* | â | â |
| Cavallo et al. | 2024 | 1.20 | 2.04 | â | 955 | -0.580 | â | â | â |
| Hunt & Reffert | 2023 | 1.45 | 1.49 | 1.48 | 640 | â | â | â | â |
| He et al. | 2023 | 1.48 | 1.40 | â | 1413 | â | â | â | â |
(*): Indicates that this parameter is assigned more than one value in the corresponding reference.
Cavallo et al. (2024)
Gold sample.