Short exposures and lucky imaging Astrophotography by Peter Bresseler

Welcome to my Website

Most of my astrophotography time is spend on deepsky imaging using lucky imaging techniques, this means short exposures in the range of 500 ms to 5 seconds per sub. With short exposures you do not need an expensive mount, auto-guiding is also not needed and the frames you take are often sharper. I can not take images more than 2 - 3 hours per session, because at home I have a limited field of view due to large trees and houses of neighbors...it is my little challenge.

Latest Results

Andromeda's Parachute is a bright Quadruply Lensed Quasar at z=2.377 and located in constellation Andromeda with a size of only 3 arcsec. J014709+463037 was discovered by PAN-STARRS June 2017
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NGC 7814 (also known as UGC 8 or Caldwell 43) is a spiral galaxy about 40 million light-years away in the constellation Pegasus. The galaxy is seen edge-on from Earth. It is sometimes referred to as "the little sombrero", a miniature version of Messier 104, imaged with Takahashi TSC-225 and ZWO ASI1600MM Pro.
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NGC 7331 Group is a group of galaxies in the constellation Pegasus. Spiral galaxy NGC 7331 is the brightest member of the group. This group is also called the Deer Lick Group and contains four other members, NGC 7335, NGC 7336, NGC 7337 and NGC 7340. Stephan's Quintet is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group was discovered by Édouard Stephan in 1877 at the Marseille Observatory, imaged with Celestron RASA C11 and ASI294mc Pro
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NGC 1275 Perseus A Galaxy Cluster - it shows the gravitational relations, tidal forces and interactions of the individual galaxies and the galaxy cluster, imaged with Celestron RASA C11
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NGC 1275 natural RGB Perseus Galaxy Cluster, imaged with Celestron RASA C11
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NGC 7027 planetary nebular, imaged with Celestron C11 RASA
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NGC 3718 galaxy group, imaged with Celestron C11 RASA
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J014709+463037 or Andromeda Parachute, imaged with Celestron C8 f/5
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Campbell's Hydrogen Star, PK64+5.1 or Henize 2-438, imaged with Celestron C11 EdgeHD f/10
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Equipment

Takahashi TSC-225 9" Schmidt-Cassegrain F/12, the clear aperture is 225 mm, 2700 mm focal length and the focal ratio is f/12, allowing the use of a smaller secondary, reduced field curvature and off-axis coma.


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The Celestron RASA 11" f/2,2 Rowe-Ackermann Schmidt Astrograph is a dedicated instrument, it can only be used at f/2.2 like a Schmidt-Camera. The RASA C11 is not a lightweight, it has a tube weight of 43 lbs (19.5 kg).


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Techniques

lucky imaging

Lucky Imaging is an effective technique for delivering near-diffraction-limited imaging on telescopes.


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exoplanet detection

The most successful type of data collection by the amateur is the transit method. As a planet passes over the portion of the star facing us, the light curve of the star drops for a time. As the planet passes through, the light curve returns to normal.


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high resolution imaging

You can further improve resolution of your images by improving your FWHM.


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