A 2.1/2 hour star trail image taken looking towards a southerly direction, from Western Australia. See Star-trail stacking for description of the software used to create this image.

Star trailsStartrails. Boyanup. 26-Dec-2013


The photo below was taken in an attempt to determine an approximate direction of South from the balcony of my south facing apartment in Bangkok. The photo is a stack 53 separate photos taken at 1 minute intervals of the the star Achernar as it crosses the meridian. Due south is determined as the point which it reaches the highest altitude angle. Since I come from Australia, I am used to Achernar rotating in a circle much higher in the sky.

Achernar passing the median on 12-Nov-2013 Achernar passing the median, with due south indicated.