CWNU 338
0.39
UTI
0.74
CN
0.53
Cdens
1.0
CC3
0.16
Clit
0.75
Cdup
Nm (P>50%)
99
Core radius and density
1.7 [pc], 2.6 [pc-2]
- CN 0.74 Moderately populated
- Cdens 0.53 Moderately dense
- CC3 1.0 Very high quality
- Clit 0.16 Rarely studied
- Cdup 0.75 Very likely 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 338 is a moderately populated, moderately dense object of very high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is rarely studied in the literature.
Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 124.556 | -39.251 | 1.594 | -5.242 | 5.425 | 30.762 |
| Swiggum et al. | 2024 | 124.443 | -39.329 | 1.61 | -5.385 | 5.352 | 28.067 |
| Hunt & Reffert | 2024 | 124.443 | -39.329 | 1.61 | -5.385 | 5.352 | 24.205 |
| Cavallo et al. | 2024 | 125.062 | -38.451 | 1.612 | â | â | â |
| Hunt & Reffert | 2023 | 124.443 | -39.329 | 1.61 | -5.385 | 5.352 | 24.205 |
| He et al. | 2022 | 124.472 | -39.302 | 1.61 | -5.249 | 5.47 | â |
| He et al. | 2022 | 124.499 | -39.285 | 1.59 | -5.25 | 5.4 | 36.9 |
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 | 0.595 | 0.445 | 0.885 | 10 | -0.018 | 160 | â | â |
| Liu et al. | 2025 | 0.64 | 0.10 | â | 17 | â | â | â | â |
| Swiggum et al. | 2024 | 0.60 | â | â | 10 | â | 270 | â | â |
| Hunt & Reffert | 2024 | 0.59 | 0.32 | 0.88 | 10 | â | 50(1) | â | â |
| Cavallo et al. | 2024 | 0.64 | 0.69 | â | 5 | -0.110 | â | â | â |
| Hunt & Reffert | 2023 | 0.59 | 0.32 | 0.89 | 10 | â | â | â | â |
| He et al. | 2022 | â | 1.00 | â | 14 | â | â | â | â |
| He et al. | 2022 | 0.59 | 0.57 | â | 16 | 0.073 | â | â | â |
(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.
Liu et al. (2025)
Classified as primordial binary cluster 68 along with Gulliver_10.
Palma et al. (2025)
Part of multiple system G62, along with Theia_472 and Gulliver_10.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).