ExoPlanet transit of HAT-P-23b by Keith Rickard

One more for the ExoClock project - this one being the first for CMHASD trustee and treasurer Keith Rickard.  It is of Exoplanet HAT-P-23b in the constellation Delphinus.

''HAT-P-23 b is a gas giant exoplanet that orbits a G-type star. Its mass is 2.09 Jupiters, it takes 1.2 days to complete one orbit of its star, and is 0.0232 AU from its star. Its discovery was announced in 2010.'' Ref:https://exoplanets.nasa.gov/exoplanet-catalog/1345/hat-p-23-b/

For more information about HAT-P-23b click here https://exoplanet.eu/catalog/hat_p_23_b--737/

ExoPlanet TrES-3b transit – observed by Simon Dawes

Another for the ExoClock project by Simon Dawes of the transit of exoplanet TrES-3b.

TrES-3b is in a very tight orbit around its host star, TrES-3, transiting the stellar disk once per 31 hours. For comparison, Mercury orbits the sun once every 88 days. TrES-3b is just a little larger than Jupiter, yet orbits around its parent star much closer than Mercury does, making it a “hot jupiter.”

ExoPlanet transit of TrES-3b by Dr Mike Rushton

The transit of Exoplanet TrES-3b by CMHASD member & trustee Dr. Mike Rushton using an eVscope for the ExoClock project.

TrES-3b is a gas giant exoplanet orbiting the star GSC 03089-00929 a G-type star and is 0.02282 AU from its star. It has an orbital period of just 31 hours and nearly twice the mass of Jupiter.  It was found by the Trans-Atlantic Exoplanet Survey in 2007. It was discovered in the constellation Hercules about 10 degrees west of the star Vega.

The planet TrES-3b is named Umbäässa. The name was selected in the NameExoWorlds campaign by Liechtenstein, during the 100th anniversary of the IAU. In the local dialect of southern Liechtenstein, Umbäässa is a small and barely visible ant. 

Transit of ExoPlanet HD189733b by Simon Dawes

Another set of observations for the ExoClock project by member Simon Dawes :-)

Simon wrote ''This was a tricky observation, a bright star with faint comparisons, on the night of the summer solstice - the worst night of the year for astronomy, due to the lack of real night - there were 627 15s exposures which, when processed, works out at about 60Gb of disk space - for a single O-C measurement!''

''This far-off blue planet may look like a friendly haven – but don’t be deceived! Weather here is deadly. The planet’s cobalt blue colour comes from a hazy, blow-torched atmosphere containing clouds laced with glass. Howling winds send the storming glass sideways at 5,400 mph (2km/s), whipping all in a sickening spiral. It’s death by a million cuts on this slasher planet!'' Ref:https://exoplanets.nasa.gov/exoplanet-catalog/6876/hd-189733-b/

HD 189733b is an exoplanet approximately 64.5 light-years away in the constellation of Vulpecula. The planet was discovered on October 5, 2005.  HD 189733b orbits its host star once every 2.2 days.

The closest transiting hot Jupiter to Earth, scientists have extensively studied the exoplanet's atmosphere.  Researchers have found that the planet has an unusual rain of molten glass.

Exoplanet transit of EPIC 246851721b by Martin Crow

The transit of EPIC 246851721b measured by CMHASD member and trustee Martin Crow for the ExoClock project on the 21st January 2023. The transit depth is a mere 5 thousandths of a magnitude. EPIC 246851721b is a gas giant exoplanet that orbits an F-type star in the constellation Taurus. Its mass is 3 Jupiters, it takes 6.2 days to complete one orbit of its star and is 0.07229 AU from its star. This planet was discovered by Yu et al. 2018. The discovery was made with the space telescope 0.95 m Kepler Telescope.

Congratulations to Martin Crow & Simon Dawes

A huge congratulations to CMHASD trustees Martin Crow and Simon Dawes for jointly winning the BAA Sir Patrick Moore Prize for Pro-Am work on Exoplanet observations with the ExoClock project along with a Mr Adrian Jones.

Below is a photo of Martin and Simon being presented with their certificates by the President of the BAA David Arditti on Saturday 10th December 2022 at the BAA Christmas Meeting. 

   From left to right: David Arditti, Adrian Jones, Martin Crow & Simon Dawes.

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