Here are today’s solar images taken from Al Sadeem Observatory, September 4, 2021.
The sky was mostly clear with light to moderate breeze which provided good transparency but average seeing at the time these images were taken.
There are 6 small sunspot groups currently visible on the Sun’s disk. To start, the largest among them AR2863 (Cao/beta) exhibited slight umbral growth of its leader spot and gradual disintegration of its trailer spots while producing several B-class solar flares over the past 24 hours. The other recently emerged and designated sunspot groups AR2864 (Dao/beta), AR2865 (Bxo/beta), AR2866 (Bxo/beta), AR2867 (Axx/alpha) all exhibit relatively simple and stable magnetic configurations, and are relatively inactive. Another forming small bipolar active region (Bxo/beta) beside AR2866 has yet to be designated at this moment (pre-AR2868). The latest sunspot number (based on visual count and Wolf number calculation) is 78.
Small enhanced plages associated with the upper mentioned sunspot groups, some short stable filaments across the Sun’s disk, and several huge eruptive prominences particularly at the NE, SW, and SW limbs were the other solar features distinctively captured in H-alpha imagery.
Space weather agencies* expect low solar activity to persist 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 (5:00 PM – 5:30 PM, September 4, 2021, from NCM Al Wathba Station):
Average Temperature: 4087°C
Average Humidity: 15.67%
Average Wind Speed and Direction: 23.4 kph from NNW
Average Cloud Cover: 15%
Average Air Pressure: 999.0 hPa
Average Solar Radiation: 176.0 W/m^2