Here are today’s solar images taken from Al Sadeem Observatory, September 15, 2021.
The sky was mostly clear with moderate breeze which provided good transparency but average seeing at the time these images were taken.
The Sun is left spotless after the decay and departure of all visible sunspot groups from last week and is now situated at the Sun’s back-side. The latest sunspot number (based on visual count and Wolf number calculation) is 0. No significant flaring activity was recorded throughout the monitoring period.
Other solar features observed were some small quiescent and moderately huge eruptive prominences at SW, NE, and NW limbs, as distinctively captured in H-alpha imagery.
Space weather agencies* expect very low solar activity with the likelihood of flaring activities not exceeding C-class levels 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 (5:00 PM – 5:30 PM, September 15, 2021, from NCM Al Wathba Station):
Average Temperature: 41.9°C
Average Humidity: 22.67%
Average Wind Speed and Direction: 18.83 kph from N
Average Cloud Cover: 15%
Average Air Pressure: 999.33 hPa
Average Solar Radiation: 149.0 W/m^2