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Alexander Mueller

Location of Photo:


Date/Time of photo:

13.08.2022 14:40 UT


C14, 2x barlow, ZWO294MC, CEM70G


The Seeliger-effect (also opposition surge), is the optical brightening of an object (composed of many particles or rough surfaces), when the source of light is right behind the observer. In the case of Saturn, this effect causes a noticeable brightening of the rings compared to the planets body a couple of days around Saturns opposition (see S&T, 07.2022, page 52-53). This picture shows Saturn a couple of hours before opposition on 14th of August 2022 (top) and on the 27th of May 2022. The brightening of the rings is clearly visible, and is especially strong around the Cassini Division.