Startrails

Overview

Star trail images are usually generated by taking the maximum pixel value of multiple frames and combining them. The idea being that stars will usually be the brightest objects in the frame and you will be able to follow their path through the night.

indi-allsky also uses some additional measurements to exclude frames with too much brightness, sometimes caused by clouds or other conditions. Images when the sun is above -15 degrees and when the moon is directly overhead are usually excluded.

Settings

Setting	Explanation
Star Trails Max Sun Altitude	Images are excluded when the sun is above this altitude
Star Trails Exclude Moon Mode	Exclude images when moon mode is active
Custom Max Moon Altitude	Custom moon mode altitude
Custom Max Moon Phase	Custom moon mode phase
Star Trails Max ADU	Images with an average ADU above this value are excluded
Star Trails Mask Threshold	When the average ADU is below the Max ADU, but the percentage of pixels is above this ADU, the image is excluded
Star Trails Pixel Threshold	Percentage of pixels used for the Mask Threshold
Star Trails Timelapse	Generate a star trails timelapse video
Star Trails Timelapse Minimum Frames	A video will only be generated when this number of frames are available for the timelapse