Polar alignment photographs

Figure 1: Photograph of the polar region taken on August 21^th, 2001, 21:00UTC. At first 20 minutes with telescope drive off, then exposed additional 30 minutes, the shutter was still open, tracked from 21:20UTC. The bright star trail on the right side is Polaris.

Figure 2: Enlarged part of fig. 1. The concentric thin star trails belong to the part of the photograph, where the telescope did not track, the shorter and thicker star trails belong to the part where the drive was on.

Figure 3: The final photograph taken on October 10^th 30 minutes tracked. The length of the star trails is now shorter than 0.5 arc seconds that corresponds to a polar distance of 10 to 15 arc seconds.

Comments, questions, corrections: markus.wildi@one-arcsec.org

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