CWNU 1897
0.22
UTI
0.3
CN
0.24
Cdens
0.38
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
30
Core radius and density
1.6 [pc], 1.2 [pc-2]
- CN 0.3 Poorly populated
- Cdens 0.24 Very loose
- CC3 0.38 Low quality
- Clit 0.1 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 1897 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It was recently reported in the literature.
â ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 123.313 | -27.612 | 0.372 | -3.737 | 2.529 | 51.632 |
| Hu & Soubiran | 2025 | 123.308 | -27.615 | â | â | â | â |
| Hunt & Reffert | 2024 | 123.305 | -27.606 | 0.341 | -3.747 | 2.559 | 49.442 |
| Cavallo et al. | 2024 | 123.308 | -27.615 | 0.337 | â | â | â |
| Hunt & Reffert | 2023 | 123.305 | -27.606 | 0.341 | -3.747 | 2.559 | 49.442 |
| He et al. | 2023 | 123.338 | -27.645 | 0.388 | -3.736 | 2.518 | 41.49 |
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 | 2.62 | 0.27 | 1.04 | 1496 | -0.455 | 236 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.200(5) | â | â | â |
| Hunt & Reffert | 2024 | 2.62 | 0.14 | 1.04 | 1578 | â | 236(1) | â | â |
| Cavallo et al. | 2024 | 2.23 | 0.77 | â | 1413 | -0.710 | â | â | â |
| Hunt & Reffert | 2023 | 2.62 | 0.14 | 1.04 | 1578 | â | â | â | â |
| He et al. | 2023 | 2.75 | 0.40 | â | 708 | â | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.91 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.91 (50th percentile).