Here are today’s solar images taken from Al Sadeem Observatory, July 28, 2021.
The sky was mostly clear with moderate breeze which provided good transparency but average seeing at the time these images were taken.
Solar activity has remained at very low levels as further structural decay was observed in visible sunspot groups AR2846 (Axx/alpha) and AR2847 (already disintegrated into plage). These two sunspot groups produced only few weak B-class solar flares over the past 24 hours. The latest sunspot number (based on visual count and Wolf number calculation) is 11.
Enhanced plages associated with upper-mentioned sunspot groups, as well as the ones associated with former sunspot groups AR2847, AR2848, and AR2849, several short filaments mostly at the southern hemisphere, and some huge eruptive prominences at opposite (NW and NE) limbs were distinctively captured in H-alpha imagery.
Space weather agencies* forecast very low solar activity with chances of B-class to C-class solar flares in the next few days. 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 (5:30 PM – 6:00 PM, July 28, 2021, from NCM Al Wathba Station):
Average Temperature: 43.57°C
Average Humidity: 17.67%
Average Wind Speed and Direction: 18.97 kph from N
Average Cloud Cover: 10%
Average Air Pressure: 982.0 hPa
Average Solar Radiation: 158.0 W/m^2
