Spectral type WO2 Apparent magnitude (J) 9.538 Apparent magnitude (H) 8.889 Apparent magnitude (K) 8.596 U-B color index -0.29 B-V color index +1.43 Astrometry Proper motion (μ) RA:-6.270 mas/yr Dec.:-3.422 mas/yr Parallax (m) 0.5755 ± 0.0284 mas Distance1,650 +110 ?????????????-90 Pc Absolute magnitude (Mv) -3.13 Details Mass 28.6 M⊙ Radius 0.80 R⊙ Luminosity (bolomet-ric) 912，000 L⊙ Temperature 200,000 K Metallicity [Fe/H] 0.0 dex Rotational velocity 1,000 km/s (vsin ) Other designations WR 142, 2MASS J20214434+3722306, GSC 02684-00001, Sand 5, St 3, UCAC2 44891902

（16:9）本球所有星球幣的模板

（3:2）本球球旗 Good bye~