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Table 3 Alignment check by stars on three days

From: Initial products of Akatsuki 1-μm camera

Parameter* C x Pixel** C y Pixel A rot R f Res Y
Unit Degree % Pixel  
Initial guess 0 0 0 100   
October 08, 2010 3.7W ± 2.8 3.4S ± 2.8 0.260cw ± 0.154 99.30 ± 0.27 2.81 North
February 24, 2016 3.0E ± 3.0 10.2S ± 3.0 0.250cw ± 0.152 99.30 ± 0.29 2.99 South
September 09, 2016 3.7E ± 3.1 10.8S ± 3.1 0.264cw ± 0.150 99.25 ± 0.30 3.15 South
  1. C x and C y are the center of the field of view (in unit of pixel); Arot is field rotation angle (degree); R f is focal length ratio (%); Res is fitting residual (pixel); and + Y is spacecraft direction, where 1 pixel = 0.0117°. “Initial guess” means the expected parameter value for exact camera setting
  2. *Center of the field of view (C x , C y ), field rotation angle (Arot), focal length ratio (R f ), fitting residual (Res) and spacecraft direction (+ Y)
  3. **1 pixel = 0.0117°