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Astronomy and Cosmology
Astronomy and Astrophysics
Detect exoplanets by yourself with the cheapest equipment
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[QUOTE="alberto91, post: 6072113, member: 652286"] Hi guys, I detected my first exoplanet (hd 189733 b) and made a video about it showing step by step how I did it. I thought it could be useful for the people interested in the topic or already starting with transit photometry. The star has an apparent magnitude of 7.7 and the exoplanet produces a drop of 2.8% during almost 2 hours. I used a tele-photo lens (the Pentacon 135 mm f 2.8), a CMOS camera (ZWO ASI 120 MM) and an equatorial mount (Skywatcher EQ3-2) I also have a dual-axis motor drive, but a simple one that only controls the right ascension would be enough. I bought most of the items second-hand from Ebay and I spent around 300 euros. To set up the tele-photo lens and the camera I have a couple of guide rings and in order to focus the tele-photo lens, I have to separate it 33 mm from the camera by using for example 2 M42 extension rings, one of them 28 mm long and the other one 5 mm. Now, the steps to detect the exoplanet are the following: [LIST=1] [*]Find out when is the exoplanet going to transit the star with the Exoplanet Transit Database. [*]With a program called SharpCap, take for example 5-second exposures with a gain of 1 for 3 hours. [*]Once the transit has finished, with a program called ‘AstroImageJ’ open all the images, select the target star and for example a couple of reference stars, and perform multi-aperture photometry to detect the light curve. [/LIST] I think it is better explained with a video: [MEDIA=youtube]XHCppdWYs6w[/MEDIA] [/QUOTE]
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Astronomy and Cosmology
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Detect exoplanets by yourself with the cheapest equipment
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