CWNU 515
(OCSN 157)
0.45
UTI
0.34
CN
0.54
Cdens
1.0
CC3
0.19
Clit
1.0
Cdup
Nm (P>50%)
34
Core radius and density
0.9 [pc], 2.7 [pc-2]
- CN 0.34 Poorly populated
- Cdens 0.54 Moderately dense
- CC3 1.0 Very high quality
- Clit 0.19 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 515 is a poorly populated, moderately dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption and metallicity 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 | 131.812 | -63.409 | 4.859 | -26.564 | 15.495 | 11.108 |
| Wei et al. | 2025 | 131.962 | -63.136 | 4.859 | -26.769 | 15.395 | â |
| Swiggum et al. | 2024 | 131.902 | -63.583 | 4.869 | -27.101 | 14.774 | 11.565 |
| Cavallo et al. | 2024 | 133.149 | -63.402 | 4.867 | â | â | â |
| Hunt & Reffert | 2023 | 131.902 | -63.583 | 4.869 | -27.101 | 14.774 | 8.118 |
| Qin et al. | 2023 | 131.9 | -63.43 | 4.87 | -26.77 | 15.43 | 11.13 |
| He et al. | 2022 | 131.893 | -63.346 | 4.862 | -26.528 | 15.418 | â |
| He et al. | 2022 | 132.183 | -63.529 | 4.84 | -26.65 | 15.39 | 11.9 |
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 | 0.21 | 0.32 | 0.5 | 28 | -0.182 | 49 | 0.51 | â |
| Liu et al. | 2025 | 0.21 | 0.07 | â | 35 | â | â | â | â |
| Wei et al. | 2025 | 0.22 | 0.40 | â | 27 | -0.250 | 56 | 0.51 | â |
| Swiggum et al. | 2024 | 0.20 | â | â | 21 | â | 42 | â | â |
| Cavallo et al. | 2024 | 0.20 | 0.63 | â | 32 | 0.100 | â | â | â |
| Hunt & Reffert | 2023 | 0.21 | 0.12 | 0.50 | 21 | â | â | â | â |
| Qin et al. | 2023 | 0.23 | 0.32 | â | 28 | â | â | â | â |
| He et al. | 2022 | â | 0.20 | â | 32 | â | â | â | â |
| He et al. | 2022 | 0.21 | 0.44 | â | 25 | -0.182 | â | â | â |
Liu et al. (2025)
Classified as tidal capture (resonant trapping binary) 79 along with HSC_2351.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as moving group. CMD class: 1.00 (50th percentile).
Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).