Sky Glow magnitude calculation

American Association of Variable Star Observers (AAVSO)
Tue, 05/03/2022 - 21:04

Hello, I want to get support on a subject. I want to make a measurement on the last photo I obtained by taking the calibration photos of the photo I obtained by taking the zenith point with the Zwo 533mc camera.

What formula do I need to use to measure the sky brightness where I live? I can read some r ,g ,b values ​​but how to approach in mag/arcsec?