SUNSPOT MONITORING – DECEMBER 17, 2020

Here are today’s solar images taken from Al Sadeem Observatory, December 17, 2020.

The sky was partly cloudy with intermittent light breeze which provided average transparency but good seeing at the time these images were taken.

Solar activity was at very low levels over the past 24 hours. AR2793 (Bxo/beta) had its trailer spot disintegrating, leaving behind its relatively small leader spot. Few weak B-class solar flares from this sunspot group were recorded by space agencies over the past 24 hours. The latest sunspot number (based on visual count and Wolf number calculation) is 11. Some huge eruptive prominences at the limbs, small enhanced plages associated with former AR2792, and AR2783; as well as a few elongated stable filaments across the Sun’s disk, were the other noteworthy solar features distinctively captured in H-alpha imagery.

Space weather agencies* forecast solar activity to remain at very low levels with chances of solar flares of B-class (possibly isolated C-class) intensity, mainly from AR2793. Close monitoring is being conducted by numerous space weather agencies for any significant development.

Equipment used are Skywatcher 120mm refractor telescope with Baader filter and unmodified Canon EOS 1D Mark IV DSLR camera for visible imagery. For H-alpha imagery, the equipment used are Lunt 60mm H-alpha solar telescope, and QHYCCD 290III mono camera; all mounted on Skywatcher EQ6 pro mount Pre-processing of visible solar images was performed in PIPP, stacking in Autostakkert, slight wavelet adjustments in Registax 6, and post-processing in Adobe Photoshop CC.

*TECHNICAL REPORTS COURTESY OF SOLAR INFLUENCE DATA CENTER (SIDC), NOAA-SPACE WEATHER PREDICTION CENTER (NOAA-SWPC)

Weather Data (4:30 PM – 5:00 PM, December 17, 2020, from NCM Al Wathba Station):

Average Temperature: 26.87°C

Average Humidity: 26.33%

Average Wind Speed and Direction: 2.5 kph from variable directions

Average Cloud Cover: 60%

Average Air Pressure: 1008.43 hPa

Average Solar Radiation: 117.33 W/m^2

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