Calm Before the Storm

Object Name The Sun
Object Type Star
Location Lost Pleiad Observatory, Tucson, AZ
Date July 31, 2010, completed at 1628 UT (9:28 AM local time)
Media HB graphite pencil on plain white paper

Additional information:
This sketch of the sun was completed the day before Active Region 11092 erupted with a C class flare that blew the dark snaking filament near the meridian right off the sun and toward earth. This eruption was responsible for the aurora that have been on display in northern latitudes over the last couple nights of August 3 and 4.

I made the sketch while observing the sun through my Lunt Solar Systems pressure tuned 60mm Hydrogen Alpha scope, and a Baader Hyperion 8-24mm Zoom eyepiece. The sketch took approximately 30 minutes to complete, at which time the sun had an altitude of 47 degrees above the horizon with an azimuth of 98 degrees. Seeing was average, due to high humidity and passing clouds, however, there were enough moments of steady seeing to allow for fine detail to be observed within the active region (AR). AR 11092 contains a very dark and sizable sunspot that is visible even in the hydrogen alpha wavelength. In addition, there are a couple thin filaments on the following (east) side of the AR.

Alan Strauss

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