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Exoplanet Gliese 436b

RA 11 42 11.09
DEC +26 42 23
Out of transit V magnitude 10.68
Measured transit duration (mins) 52.2±2
Measured transit depth (mmag) 6.8±0.7

Gliese 436b is a "hot neptune" planet orbiting a star10.2±0.2 parsecs away in the constellation Auriga. Gliese 436 b was discovered in August 2004 by R. Paul Butler and Geoffrey Marcy of the Carnegie Institute of Washington and University of California, Berkeley using the radial velocity method. The planet has a radius of just 4.3 times that of the earth and orbits it's parent star every 2.64 days. The star is a M2.5 V red dwarf star of mass 0.41 solar masses.

Exposure time was 60sec, filter = Wratten 12.

The plot of the transit may be seen below. I submitted the data to the Exoplanet Transit Database.

GJ436b

 

Derived system parameters:

GJ436b system