Sunspot data for 18 May 2021 of period 2021Q2: (PREV DAY - NEXT DAY)
| Sun210518_1135UTC_sketch.jpg | Sun210518_1141UTC.jpg |
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This afternoon (UTC morning) we had 80% cumuli with varying seeing, but a small clearance was large enough to make the following observation:
Observation date/time: 18 May 2021 @ 11:35 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: 2 | |
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