AR 2396

The behemoth sunspot AR 2396 is slowly moving across the solar disc, arousing both sketchers and astro-photographers. So far I have managed to sketch it twice, and even if I find it difficult to estimate the size of sunspots, it seems to have grown from one day to the next. Do note that the difference in size between the sketches below does not primarily correspond to any physical developments, but rather to the scale used while sketching.

Edit: I managed to make a third sketch just as AR 2396 approached the limb. Inserted below.

Sketched 8 August 2015, UT 12:00, using a SkyWatcher 10", masked down to 100 mm, and a Baader Hyperion 17 mm eyepiece (70x). Seeing 3/5.
Sketched 8 August 2015, UT 12:00, using a SkyWatcher 10″, masked down to 100 mm, and a Baader Hyperion 17 mm eyepiece (70x). Seeing 3/5.
Image: SDO/HMI.
Image: SDO/HMI.
IMG
Sketched 9 August 2015, UT 08:30, using a SkyWatcher 10″, masked down to 100 mm, and a Baader Hyperion 17 mm eyepiece (70x). Seeing 4-5/5.
20150809_1030_hmiigr_1024
Image: SDO/HMI.
IMG_0002
Sketched 12 August 2015, UT 14:00, using a SkyWatcher 10″, masked down to 100 mm, and a Baader Hyperion 17 mm eyepiece (70x). Seeing 2-3/5.
20150812_1500_hmiigr_512
Image: SOHO/HMI
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