CWNU 37
0.30
UTI
0.38
CN
0.34
Cdens
0.5
CC3
0.13
Clit
1.0
Cdup
Nm (P>50%)
38
Core radius and density
1.6 [pc], 1.7 [pc-2]
- CN 0.38 Poorly populated
- Cdens 0.34 Loose
- CC3 0.5 Intermediate quality
- Clit 0.13 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 37 is a poorly populated, loose 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 rarely studied in the literature.
Note: This object contains blue stragglers according to at least one source.
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 |
| Li et al. | 2023 | 276.728 | -12.506 | 0.46 | 0.84 | 0.87 | â |
| 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 | 2.03 | 3.83 | 2.34 | 851 | -0.180 | 1006 | â | 4 |
| Hu & Soubiran | 2025 | â | â | â | â | -0.220(5) | â | â | â |
| Hunt & Reffert | 2024 | 2.03 | 3.83 | 2.34 | 260 | 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 |
| Li et al. | 2023 | 2.75 | 2.20 | â | 6310 | -0.140 | â | â | 4(1) |
| He et al. | 2022 | 1.55 | 2.47 | â | 2512 | 0.398 | 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.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.16 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.16 (50th percentile).