Sunspot data for 11 April 2021 of period 2021Q2: (PREV DAY - NEXT DAY)
| No sketch made. | Sun210411_0832.jpg |
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luckily the weather forecast was incorrect. We would have stratus and rain for all of today for the third day in a row, but we woke up with less than 50% cumuli, so I managed to make the following observation:
Observation date/time: 11 April 2021 @ 08:15 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 (340mm distance, 80mm diameter)
Reference: Earth's rotation axis
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Number of groups: 0
Group 1:
Number of sunspots: 0
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Total number of sunspots: 0
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