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Detecting Exoplanets Presentation by Keith Rickard 6 March 2008 What is a an Exoplanet? • Short for Extrasolar-Planet • Is a planet beyond the Solar System orbiting another star • 51 Pegasi was the first example discovered on 6 Oct 1995 • 276 exoplanets have so far been discovered • So far, only indirect methods have been used Indirect methods of detection • Most productive is the radial velocity or Doppler method Indirect methods of detection • Transit method Detection by the Amateur - Equipment Keith Rickard: • 8” Meade LX200 Classic Schmidt Cassegrain • F3.3 focal reducer • SBIG ST-7XME CCD Martin Crow: • 9.25” Celestron Schmidt Cassegrain • F5.0 focal reducer • Starlight Xpress MX 916 CCD Extrasolar planetary system XO-2b Planet: • Discovered 2007 • Orbital period: • Radius: ~2.615838 days ~0.973 Jupiter radii Star: • Tycho Catalogue No: • Visual Magnitude: • Mass: TYC3413-5-1 11.25 ~0.98 solar masses Is this Crayford’s first detected Exoplanet? Martin and I think so… THE END
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