Aphelion and Perihelion Sun

A comparison of the angular size of the Sun during the most recent aphelion in 2025 and perihelion in 2026. The angular diameter of the Sun during the perihelion of 2026 was about 3.4% larger than it was during the aphelion of 2025.

For the aphelion image:
Sky-Watcher Evoguide 50DX Telescope
Baader AstroSolar OD 5.0 Filter
Baader Red Filter
GSO 2x Barlow
QHY5III678M Camera

For the perihelion image:
APM 80/500 APO Telescope
Lunt Solar Wedge
Baader ND filter OD 3.0
Baader Solar Continuum 540 nm Filter
GSO 2x Barlow
QHY5III678M Camera

Stacked with AutoStakkkert!4
Wavelet adjustment with RegiStax 6
Enhancement and false color with Photoshop 2020