NGC 6939

(Melotte 231; Collinder 423; OCL 217; FSR 0315; MWSC 3357; FoF 640)

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UCC G095.9+12.2

C3
N_50
r_50
AA 1143 8.1

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Positions

Reference RA DEC Plx pmRA pmDE Rv
Dias et al. (2002) 307.875 60.662 -2.37 -5.29 -42.0
Chen et al. (2003) 307.879 60.657
Kharchenko et al. (2012) 307.882 60.66 -2.07 -1.35
Loktin & Popova (2017) 307.875 60.662 -0.67 -0.41 -42.0
Bica et al. (2019) 307.817 60.63
Liu & Pang (2019) 307.919 60.648 0.508 -1.845 -5.408
Cantat-Gaudin et al. (2020) 307.917 60.653 0.506 -1.841 -5.413
Dias et al. (2021) 307.928 60.655 0.506 -1.838 -5.41 -18.775
Jaehnig et al. (2021) 307.914 60.655 0.54 -1.845 -5.42
Hunt & Reffert (2023) 307.901 60.651 0.525 -1.817 -5.462 -18.805
Cavallo et al. (2024) 307.932 60.657 0.525
Hunt & Reffert (2024) 307.901 60.651 0.525 -1.817 -5.462 -18.805
Hu & Soubiran (2025) 307.932 60.657
UCC 307.919 60.653 0.522 -1.82 -5.459 -19.096

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Estimated members

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Fundamental parameters

Reference Values
Dias et al. (2002) E(B-V)=0.33, Dist=1800.0, Age=9.2, [Fe/H]=0.0
Chen et al. (2003) E(B-V)=0.32, HDis=1185, Age=2.21, [Fe/H]_1=0.02
Kharchenko et al. (2012) e_bv=0.31, distance=1800, log_age=9.27, metallicity=0.0
Loktin & Popova (2017) E(B-V)=0.311, Dmod=10.712, logt=9.339
Liu & Pang (2019) Age=1.66, Z=0.5
Cantat-Gaudin et al. (2020) AVNN=0.85, DMNN=11.3, AgeNN=9.23
Dias et al. (2021) Av=0.919, Dist=1757, logage=9.207, [Fe/H]=0.462
Hunt & Reffert (2023) AV50=1.332, diffAV50=1.294, MOD50=11.322, logAge50=9.021
Cavallo et al. (2024) AV50=1.24, dMod50=11.34, logAge50=9.1, [Fe/H]50=0.3
Hunt & Reffert (2024) MassJ=5146.00
Hu & Soubiran (2025) MA22=0.05, MA23f=-0.23, MA23g=-0.03, MZ23=0.09, MK24=-0.15, MF24=-0.08

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Cluster region