Sunday, April 22, 2012

Active Sun - 4/21/2012

Sunspot groups 1463 (barely visible near the limb, left), 1462 (left of center) and 1459 (upper-right).

Sunspot group 1465

Sunspot groups 1459 (upper-left) and 1460 (lower-right)

Detailed view of sunspot groups 1459 and 1460

Sun in the visible spectrum, April 21, 2012.


  1. Wow, these are awesome! Especially the first and last ones! Is the last a mosaic?

  2. The last one is a single image. It was taken with the ST80 using the full-spectrum solar filter. It is composed of 51 stacked exposures of 1/3200 second each.

  3. It's very nicely done. What setup do you plan to use for the transit?

  4. I will be using the Canon EOS Rebel XS (1000D) on the Orion ShortTube 80 with a full-spectrum solar filter, and a Meade DSI mounted on a Coronado PST via a 2X Barlow. The PST will be mounted piggyback on the ST80. Both scopes will be on the Vixen Super Polaris mount. I'll try to post a pic of the setup soon.