Sunspot data for 21 May 2021 of period 2021Q2: (PREV DAY - NEXT DAY)
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Today we had some fierce winds, with up to 9Bft gusts. Under those conditions a dome is ideal as it was no problem observing despite that wind. I made the following observation:
Observation date/time: 21 May 2021 @ 15:20 UTC Telescope: GTT60 (Galileo Type Telescope) Focal length: 1490mm (plano convex singlet) Aperture: 60mm Stop: 30mm Eyepiece: -75mm (plano concave singlet, 24mm aperture) Observation type: projection (350mm distance, 80mm diameter) Reference: Earth's rotation axis =================================================================== Total number of sunspots: 1 | |
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