HD 189733

June 19th. Another transit of the well known HD 189733_b nearby M27 in Vulpecula.

Its an easy target for someone starting in exoplanet transits, not long duration and with a good depth. The difficult part is it's brightness, we should be very careful maintaining it the linearity window.

click here for a Finder of HD 189733

Transit signature

If you are interested in the data from this observation please email me @ joao . gregorio & atalaia . org

Below we have the same plot but showing measurement errors

Plotting the errors

Joao Gregorio