CWNU 45
0.27
UTI
0.26
CN
0.1
Cdens
0.62
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
26
Core radius and density
3.4 [pc], 0.5 [pc-2]
- CN 0.26 Poorly populated
- Cdens 0.1 Very loose
- CC3 0.62 Intermediate quality
- Clit 0.19 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 45 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and mass parameters (see Parameters). It is rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 107.84 | -27.893 | 1.659 | -3.247 | 6.348 | 35.498 |
| Yan et al. | 2026 | 108.099 | -27.984 | 1.613 | -3.139 | 6.275 | â |
| Liu et al. | 2025 | 108.1 | -27.98 | 1.61 | -3.14 | 6.28 | 36.46 |
| Wei et al. | 2025 | 107.886 | -27.539 | 1.691 | -3.981 | 5.371 | â |
| Swiggum et al. | 2024 | 108.099 | -27.984 | 1.613 | -3.139 | 6.275 | 36.443 |
| Hunt & Reffert | 2024 | 108.099 | -27.984 | 1.613 | -3.139 | 6.275 | 36.461 |
| Cavallo et al. | 2024 | 108.283 | -28.061 | 1.618 | â | â | â |
| Hunt & Reffert | 2023 | 108.099 | -27.984 | 1.613 | -3.139 | 6.275 | 36.461 |
| He et al. | 2022 | 107.845 | -27.911 | 1.67 | -3.26 | 6.35 | 44.4 |
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 | 0.6 | 0.13 | 0.6 | 33 | 0.060 | 463 | 0.59 | â |
| Yan et al. | 2026 | â | â | â | 41 | â | â | â | â |
| Liu et al. | 2025 | 0.60 | 0.02 | â | 35 | â | â | â | â |
| Wei et al. | 2025 | 0.67 | 0.42 | â | 13 | 0.000 | 651 | 0.59 | â |
| Swiggum et al. | 2024 | 0.60 | â | â | 33 | â | 463 | â | â |
| Hunt & Reffert | 2024 | 0.59 | 0.13 | 0.60 | 33 | â | 56(1) | â | â |
| Cavallo et al. | 2024 | 0.66 | 0.33 | â | 12 | 0.060 | â | â | â |
| Hunt & Reffert | 2023 | 0.59 | 0.13 | 0.60 | 33 | â | â | â | â |
| He et al. | 2022 | 0.55 | 0.06 | â | 40 | 0.198 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Yan et al. (2026)
Number of WDs: expected from single-star evolution N=1, with probability of formation through binary evolution >=0.5 N=1.
Liu et al. (2025)
Classified as primordial binary cluster 49 along with OC_0407, and as primordial binary cluster 126 along with Collinder_132, and of multiple system 21 along with Collinder_132, OC_0407 and Gulliver_21.
Palma et al. (2025)
Part of multiple system G65, along with Theia_1147, OC_0407, Gulliver_21 and Collinder_132.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.97 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).