|
Just bear in mind that even if you are perfectly polar aligned. and if the starting point of your alignment is perfectly at the 'home' position of 0.00 Hrs, 90 degrees, should your time setting not also be perfect for your location (E-W), there will be an initial pointing error of 15 arc minutes per minute of entered time inaccuracy.
Also consider that the 'time' you enter is for a time zone, ie same for Sydney or Broken Hill, and a given star will have a different relative RA angle in Sydney as distinct from Broken Hill.
Hence it is quite acceptable that the initial RA pointing angle is out. However, for a given location and accurate input data, that RA pointing error should start out reasonably consistent.
The DEC value should be close regardless of system timing inaccuracies.
HTH,
BC
|