Thursday, May 9, 2019

Sunspots AR2740 and AR2741, 9 May 2019

The younger AR2741 is getting darker than AR2740. I was able to separate AR2741's outer, brighter rim (penumbra) from its inner, darker umbra in today's image. Based on the sun's pixel size and diameter in miles, I determined that AR2741's umbra has a diameter of 9,255 miles and it's penumbra has a diameter of 18,023 miles. Compare this to Earth with a diameter of 7,920 miles.

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