CWNU 2503
0.13
UTI
0.0
CN
0.01
Cdens
0.38
CC3
0.13
Clit
1.0
Cdup
Nm (P>50%)
15
Core radius and density
5.9 [pc], 0.06 [pc-2]
- CN 0.0 Sparse
- Cdens 0.01 Very loose
- CC3 0.38 Low 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 2503 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age 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 | 91.359 | 11.995 | 0.18 | 0.267 | -0.213 | 46.858 |
| Hu & Soubiran | 2025 | 91.342 | 11.969 | â | â | â | â |
| Zhang et al. | 2024 | 91.395 | 11.953 | â | â | â | â |
| Hunt & Reffert | 2024 | 91.395 | 11.953 | 0.18 | 0.251 | -0.245 | 3.215 |
| Cavallo et al. | 2024 | 91.342 | 11.969 | 0.176 | â | â | â |
| Hunt & Reffert | 2023 | 91.395 | 11.953 | 0.18 | 0.251 | -0.245 | 3.215 |
| He et al. | 2023 | 91.414 | 12.099 | 0.228 | 0.262 | -0.24 | 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 | 4.585 | 1.21 | 1.35 | 698 | -0.189 | 196 | â | â |
| Hu & Soubiran | 2025 | â | â | â | â | -0.350(5) | â | â | â |
| Zhang et al. | 2024 | â | â | â | â | -0.189(1) | â | â | â |
| Hunt & Reffert | 2024 | 5.10 | 1.21 | 1.35 | 601 | â | 196(1) | â | â |
| Cavallo et al. | 2024 | 3.68 | 0.93 | â | 933 | 0.020 | â | â | â |
| Hunt & Reffert | 2023 | 5.10 | 1.21 | 1.35 | 601 | â | â | â | â |
| He et al. | 2023 | 4.07 | 1.40 | â | 794 | 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: 0.80 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.80 (50th percentile).