| AR 822 CaK/H-alpha |
SolarMax 70's
| | Gary Palmer | November 28, 2005 |
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| Retrospect's are fun & rewarding projects to work on. Just ask a Comet Hunter or someone who discovered a Super Nova in a distant galaxy. Whether it’s recording the tilting rings of Saturn or monitoring the delicate color shift in Jupiter's great red spot. Revel while the dust storms whirl on Mars & gaze as the terminator sweeps across our moonscape. Now while all of these gems are truly magnificent & breathtaking. . . if I had to pick just “1” It would have to be our closest star in its state of flux. |
| This Calcium K & Hydrogen-alpha retrospect captures active region 822 nearly in the center of the disk on the 18th. The series captured at approximately the same time each day with a Sun altitude of 16º. Careful examination of the sunspots show them converging. Actually, it’s an illusion as the group moves towards the western limb they appear to foreshorten. |
| Each day different atmospheric conditions took precedence over the clarity and detail of the active region. My Solar Imaging Puzzle remained constant so including images captured in less than favorable conditions demonstrates the impact our atmosphere has on the outcome of an imaging session. |
| In the Calcium K wavelength the bright whiter patches surrounding the sunspots indicate magnetic activity, the brighter the patches or beaches as their called exhibits intense magnetic activity. |
| In the H-alpha band the “Wilson Effect” is evident in the last set captured on the 24th. This refers to the depressed appearance of Sunspots when positioned close to the solar limb. The impression is that sunspots are cavities in the solar photosphere. The reason is that the radiation we observe is coming from deeper layers in the sunspot than in the surrounding photosphere. The detection of this depression by Alexander Wilson dates back to 1769. SteadySkies, g a r y p a l m e r |
| Classifications: Astrophotography, Meade News, General, Walmart, Solar| 11/28/2005 - 2/28/2008 |
