CWNU 277
0.26
UTI
0.0
CN
0.38
Cdens
0.75
CC3
0.1
Clit
1.0
Cdup
Nm (P>50%)
23
Core radius and density
0.9 [pc], 1.9 [pc-2]
- CN 0.0 Sparse
- Cdens 0.38 Loose
- CC3 0.75 High quality
- Clit 0.1 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 277 is a sparse, loose object of high C3 quality. Its parallax locates it at a moderate distance, above 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 absorption, age, 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 | 192.232 | -60.572 | 0.467 | -4.127 | 0.104 | â |
| Hunt & Reffert | 2024 | 192.21 | -60.576 | 0.471 | -4.125 | 0.112 | â |
| Cavallo et al. | 2024 | 192.238 | -60.586 | 0.47 | â | â | â |
| Hunt & Reffert | 2023 | 192.21 | -60.576 | 0.471 | -4.125 | 0.112 | â |
| He et al. | 2022 | 192.201 | -60.565 | 0.47 | -4.13 | 0.11 | 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 | 1.97 | 1.05 | 0.64 | 176 | -0.446 | 174 | â | â |
| Liu et al. | 2025 | 3.48 | 0.45 | â | 182 | â | â | â | â |
| Hunt & Reffert | 2024 | 1.97 | 1.05 | 0.64 | 176 | â | 174(1) | â | â |
| Cavallo et al. | 2024 | 1.87 | 1.43 | â | 76 | -0.010 | â | â | â |
| Hunt & Reffert | 2023 | 1.97 | 1.05 | 0.64 | 176 | â | â | â | â |
| He et al. | 2022 | 1.51 | 1.58 | â | 32 | -0.881 | 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 tidal capture (resonant trapping binary) 118 along with CWNU_2664.
Palma et al. (2025)
Part of multiple system G59, along with HSC_2552, CWNU_2692, NGC_4755, Ruprecht_105 and CWNU_2664.
Cavallo et al. (2024)
Gold sample.
Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 1.00 (50th percentile), true positive (human-assigned).
Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 1.00 (50th percentile), true positive (human-assigned).