CWNU 37
0.50
UTI
0.38
CN
1.0
Cdens
0.5
CC3
0.3
Clit
1.0
Cdup
Stellar density (N50/rad)
7.8 [N/pc2]
- CN 0.38 Poorly populated
- Cdens 1.0 Very dense
- CC3 0.5 Intermediate quality
- Clit 0.3 Poorly 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 37 is a poorly populated, very dense object of intermediate C3 quality. Its parallax locates it at a moderate* distance, near the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.
(*): The parallax distance estimate (~2.11 kpc) differs significantly from the median photometric distance (~1.55 kpc).
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 276.734 | -12.49 | 0.474 | 0.859 | 0.867 | 14.521 |
| Hu & Soubiran | 2025 | 276.725 | -12.516 | â | â | â | â |
| Hunt & Reffert | 2024 | 276.714 | -12.48 | 0.462 | 0.853 | 0.848 | 13.695 |
| Cavallo et al. | 2024 | 276.725 | -12.516 | 0.462 | â | â | â |
| Hunt & Reffert | 2023 | 276.714 | -12.48 | 0.462 | 0.853 | 0.848 | 13.695 |
| He et al. | 2022 | 276.73 | -12.515 | 0.47 | 0.88 | 0.9 | 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 | 1.55 | 3.83 | 2.34 | 851 | -0.220 | 1006 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.220(5) | â | â | â |
| Hunt & Reffert | 2024 | â | â | â | â | â | 1006(1) | â | â |
| Cavallo et al. | 2024 | 1.53 | 3.91 | â | 851 | -0.700 | â | â | â |
| Hunt & Reffert | 2023 | 2.03 | 3.83 | 2.34 | 260 | â | â | â | â |
| He et al. | 2022 | 1.55 | 2.34 | â | 2512 | 0.916 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Palma et al. (2025)
Classified as optical pair P371, along with UBC_1020.
Cavallo et al. (2024)
Gold sample.