CWNU 1129
(OCSN 121)
0.45
UTI
0.36
CN
0.87
Cdens
0.75
CC3
0.13
Clit
1.0
Cdup
Nm (P>50%)
36
Core radius and density
1.2 [pc], 4.4 [pc-2]
- CN 0.36 Poorly populated
- Cdens 0.87 Dense
- 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 1129 is a poorly populated, dense object of high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the absorption and age parameters (see Parameters). It is rarely studied in the literature.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | 99999â | 68.836 | 22.846 | 6.212 | 10.466 | -17.105 | 19.187 |
| Liu et al. | 2025 | 68.77 | 22.8 | 6.25 | 10.84 | -17.45 | 14.88 |
| Swiggum et al. | 2024 | 68.771 | 22.8 | 6.251 | 10.845 | -17.45 | 16.997 |
| Cavallo et al. | 2024 | 67.525 | 24.764 | 6.264 | â | â | â |
| Hunt & Reffert | 2023 | 68.771 | 22.8 | 6.251 | 10.845 | -17.45 | 14.883 |
| Qin et al. | 2023 | 68.72 | 22.82 | 6.23 | 10.81 | -17.11 | 20.15 |
| He et al. | 2022 | 68.651 | 22.91 | 6.161 | 10.017 | -17.079 | 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 | 0.16 | 1.04 | 1.83 | 13 | 0.230 | 61 | â | â |
| Liu et al. | 2025 | 0.16 | 0.48 | â | 21 | â | â | â | â |
| Swiggum et al. | 2024 | 0.16 | â | â | 15 | â | 61 | â | â |
| Cavallo et al. | 2024 | 0.17 | 3.12 | â | 11 | 0.230 | â | â | â |
| Hunt & Reffert | 2023 | 0.16 | 2.19 | 1.83 | 15 | â | â | â | â |
| Qin et al. | 2023 | 0.25 | 1.04 | â | 4 | â | â | â | â |
| He et al. | 2022 | â | 0.95 | â | 2 | â | â | â | â |
Liu et al. (2025)
Classified as primordial binary cluster 96 along with Theia_66, and as primordial binary cluster 346 along with Theia_54, and as primordial binary cluster 347 along with Theia_71, and of multiple system 35 along with Theia_71, HSC_1438, Theia_54, HSC_1426 and Theia_66.
Palma et al. (2025)
Part of multiple system G31, along with Theia_54 and Theia_66.
Cavallo et al. (2024)
Bronze sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.71 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.71 (50th percentile).