WISEP J190648.47+401106.8
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Lyra |
| Right ascension | 19h 06m 48.075s |
| Declination | +40° 11′ 08.59″ |
| Characteristics | |
| Spectral type | L1 |
| Apparent magnitude (J) | 13.078±0.024 |
| Apparent magnitude (H) | 12.260±0.023 |
| Apparent magnitude (K) | 11.771±0.018 |
| Astrometry | |
| Proper motion (μ) | RA: 438.293 mas/yr Dec.: -179.712 mas/yr |
| Parallax (π) | 59.6710±0.1047 mas |
| Distance | 54.66 ± 0.10 ly (16.76 ± 0.03 pc) |
| Details | |
| Radius | 0.92±0.07 RJup |
| Luminosity (bolometric) | 0.0002 L☉ |
| Temperature | 2300±75 K |
| Rotation | 0.37015 d (8.9 hr) |
| Rotational velocity (v sin i) | 11.2±2.2 km/s |
| Database references | |
| SIMBAD | data |
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WISEP J190648.47+401106.8 (abbreviated to W1906+40) is an L-type brown dwarf 54.7 light-years (16.8 parsecs) away in the constellation Lyra. It was discovered in 2011, and was the first L-dwarf discovered in the field of view of the Kepler space telescope.
In 2015 it was shown to have on its surface a storm the size of Jupiter's Great Red Spot. The storm rotates around the star roughly every 9 hours and has lasted since at least 2013, when observations of the storm began.
W1906+40 has an intrinsic brightness of 0.02% that of the Sun, a radius of 0.9 times that of Jupiter, and a surface temperature of 2,300 K. The star emits significant flares.