CWNU 439
0.32
UTI
0.33
CN
0.28
Cdens
0.75
CC3
0.13
Clit
1.0
Cdup
Nm (P>50%)
33
Core radius and density
1.6 [pc], 1.4 [pc-2]
- CN 0.33 Poorly populated
- Cdens 0.28 Loose
- CC3 0.75 High 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 439 is a poorly populated, loose object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by high extinction. It is catalogued as a 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 | 306.753 | 43.528 | 0.565 | -0.044 | -3.047 | -46.875 |
| Zhang et al. | 2024 | 306.773 | 43.518 | â | â | â | â |
| Hunt & Reffert | 2024 | 306.773 | 43.518 | 0.568 | -0.012 | -3.043 | -46.863 |
| Cavallo et al. | 2024 | 306.719 | 43.484 | 0.561 | â | â | â |
| Hunt & Reffert | 2023 | 306.773 | 43.518 | 0.568 | -0.012 | -3.043 | -46.863 |
| Li et al. | 2023 | 306.724 | 43.512 | 0.55 | -0.03 | -3.07 | â |
| He et al. | 2022 | 306.742 | 43.523 | 0.56 | -0.04 | -3.05 | -14.0 |
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 | 1.85 | 3.6 | 2.795 | 112 | 0.226 | 292 | â | 2 |
| Zhang et al. | 2024 | â | â | â | â | 0.187(1) | â | â | â |
| Hunt & Reffert | 2024 | 1.72 | 3.60 | 2.80 | 112 | â | 292(1) | â | â |
| Cavallo et al. | 2024 | 1.85 | 3.70 | â | 91 | 0.590 | â | â | â |
| Hunt & Reffert | 2023 | 1.72 | 3.60 | 2.79 | 112 | â | â | â | â |
| Li et al. | 2023 | 2.88 | 2.30 | â | 5012 | -0.006 | â | â | 2(1) |
| He et al. | 2022 | 2.04 | 4.94 | â | 50 | 0.265 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Silver 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).