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IC4603-4 in Ophiuchus


MarkS

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This image was shot from my Mt. Macedon site on 30th May. ASA10N at f/2.8, DDM85A, Moravian G2-8300 camera, Astrodon filters. Total exposure 4hours: 2 hours L, 2hours RGB.

 

Not a particularly good night: SQL best 21.24, seeing ~3". Just managed to beat the dew as RH > 100% near the end of the run.

 

As a sidebar to this, the original image exhibited two minor planet/asteroid tracks. The first was readily identified as 7 Iris, but the second took some tracking down with help from the people at Siding Spring. It was finally identified as 1109 Tata, a 66km diameter object with a 88 year orbital period and apparent magnitude 14 that night. Of course, both these left unsightly multicoloured tracks which I removed for this picture.

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