While waiting for simultaneously taken images from distant sites on Earth it is possible to combine pictures of one's own with those of NASA's Solar Dynamics Observatory (SDO) which can be downloaded from SDO's data archives. SDO circulates around the Earth on a geosynchronous orbit. To orient SDO images (of May 9th) they must be clockwise rotated by 22.25°.
|Hannover 14:00:01 UT||SDO 14:00:00 UT||Combination Hannover-SDO(rot.)
Mercury's parallax is visible!
After measuring Mercury's positions on the Hannover and SDO images their values can be filled into the Excel sheet comp2Mercurypositions and the momentary position of the satelite which we have got from NASA can be determined with the Excel sheet SDO_EPHEM.
In this way the parallactic effect at 14:00 UT leeds to a quite good measure of the Astronomical Unit: πS=8.68" or 1 AU=151000000km.
|First "Earth-bound" parallax effects|
|Geseke (Germany) - Rosario (Argentina)
|Lippstadt (Germany) - IAS (Namibia)
|Pointe Saint Matieu (France) - Rosario (Argentina)
The following comparison, done by R. Schünecke, between Caracas, Venezuela, (E. Torres) and Lippstadt, Germany (R. Schünecke), leeds to a solar parallax of 8.39".
|Caracas/Lippstadt 13:00 UT|
||last update: 10.06.2016|