Giant spot 3590 yesterday February 25th.

[Gonariu]

Yesterday afternoon I took a shot of the sun with my smartphone, placed next to my little 80/400 achromat that I'm sharing here. The photography is acceptable but nothing exceptional, with an iPhone placed at the eyepiece of a Tak you get much better shots. What I aim for with photographs of this type is to calculate, at least approximately, the size of the sunspots. This is done very simply, you see how many pixels the solar diameter corresponds to and how many pixels the size of the spot corresponds to (I took the vertical length); since the diameter of the sun is known, with a proportion the desired dimensions are obtained. The dimensions I came up with are approximately 119,000 km (i.e. 74,400 miles). I'm sharing the image after retouching it.

Observation: There were some clouds at the time of shooting.

[h107]

I don't know I'd still say that's pretty cool!