British Astronomical Association
Supporting amateur astronomers since 1890

Secondary menu

Main menu

BAA Community Member Pages Simon Dawes
Image search

My First Variable Star observation - (was an Exo-Planet)

Image

Expand image

About this observation
Observer
Simon Dawes
Time of observation
04/04/2020 - 22:00
Object
HAT-P-30b
Observing location
Bexleyheath, Kent (S.E. London really), England
Equipment
Sky Watcher MN190
ZWO ASI 1600 Pro mono
Photometric 'R' filter
EQ6
Exposure
40s
Tags
Like This Image
Share

Well ok you might debate if an exo-planet is a variable star, but I was taught by Dick Chambers and he said it was an extrinsic variable and those that knew Dick will know he was never wrong.

I promised Roger Pickard I'd observe a variable star this year - here it is Roger.

Comments

Forthimage's picture

More like an eclipsing binary really - with the eclipsing body being a planet. Good observation.

There was some discussion on the ExoClock project as to whether a CMOS sensor could be used instead of a CCD. I think you've just shown it can. Is the 1600 12- or 14-bit? Most CCDs are 16-bit I think.

Simon Dawes's picture

It is only 12bit but when I compare my results to a friend of mine using a CCD the scatter, range etc. in the results look very similar - if I can get to more sensitive measurements will remain to be seen, but given this is the first 'variable star' I've measured I'd say it was quite promising. I'm very much a beginner in this field. 

Copyright of all images and other observations submitted to the BAA remains with the owner of the work. Reproduction of the work by third-parties is expressly forbidden without the consent of the copyright holder. For more information, please contact the webmaster.