By Jean Ricigliano | 2025-02-24
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Active Region AR3998
On 02/22/2025 11:00 am by Michael Teoh | Website | Heng Ee Observatory, Penang, Malaysia
The active region AR3998 first emerged on February 16, 2025 and continued to grow into a large and complex sunspot group containing more than 30 sunspots. It had also produced numerous C-class solar flares.
APM-TMB 228/2050 Telescope
Lunt Solar Wedge
Baader ND filter OD 3.0
Baader Solar Continuum 540nm Filter
GSO 2x Barlow
QHY5III678M Camera
Stacked 2 x 1,000 frames with AutoStakkkert!4
Wavelet adjustment with Registax 6
Enhancement, false color and mosaic creation with Photoshop 2020
