CWNU 1398
0.16
UTI
0.0
CN
0.41
Cdens
0.25
CC3
0.06
Clit
1.0
Cdup
Nm (P>50%)
23
Core radius and density
1.2 [pc], 2.1 [pc-2]
- CN 0.0 Sparse
- Cdens 0.41 Loose
- CC3 0.25 Low quality
- Clit 0.06 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 1398 is a sparse, loose object of low C3 quality. Its parallax locates it at a relatively close distance, near 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 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 | 237.365 | -55.94 | 0.509 | -0.846 | -2.709 | â |
| Hunt & Reffert | 2024 | 237.373 | -55.93 | 0.505 | -0.839 | -2.727 | â |
| Cavallo et al. | 2024 | 237.381 | -55.967 | 0.502 | â | â | â |
| Hunt & Reffert | 2023 | 237.373 | -55.93 | 0.505 | -0.839 | -2.727 | â |
| He et al. | 2023 | 237.364 | -55.942 | 0.518 | -0.853 | -2.691 | 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 | 1.935 | 3.695 | 1.99 | 124 | -0.400 | 238 | â | â |
| Hunt & Reffert | 2024 | 1.87 | 3.59 | 1.99 | 200 | â | 238(1) | â | â |
| Cavallo et al. | 2024 | 2.10 | 4.03 | â | 48 | -0.400 | â | â | â |
| Hunt & Reffert | 2023 | 1.87 | 3.59 | 1.99 | 200 | â | â | â | â |
| He et al. | 2023 | 2.00 | 3.80 | â | 6 | â | 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 P198, along with FoF_1182.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.74 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.74 (50th percentile).