Cochise College-
  Physicsweb
Physics Educational Resources 
Roger Weller, geology instructor
wellerr@cochise.edu
copyright 2009-R.Weller    edited 11/3/09

                                            Basic Astronomy Data-2
                             Gravity Effects

gravitational field strength (g) due to Earth
         distance in AU            acceleration
                       1 AU                                177.17 x 10-10 m/s2
                       4 AU                                  11.07 x 10-10 m/s2
                      16 AU                                   0.692 x 10-10 m/s2
                      64 AU                                   0.0433 x 10-10 m/s2
                      88.7 AU                                0.0225 x 10-10 m/s2


gravitational field strength (g) due to Sun
         distance in AU            acceleration
                       1 AU                                   5.93 x 10-10 m/s2
                       4 AU                                   3.71 x 10-10 m/s2
                      16 AU                                  2.32 x 10-10 m/s2
                      64 AU                                  1.45 x 10-10 m/s2
                      89.7 AU                               0.737 x 10-10 m/s2

escape velocity from Earth's gravitational field
             distance in km                  escape velocity
                             
  100                                                11.09 km/sec
  
                      1,000                                                            10.39 km/sec
                        10,000                                                            6.98 km/sec
                           
   100,000                                             2.74 km/sec
                               
1,000,000                                          0.890 km/sec
                        10,000,000                                        0.283 km/sec
                        1.5 x 108  (1 AU)                               72.0 m/sec
                        4.5 x 108  (3 AU)                               42.1 m/sec

escape velocity from Sun's gravitational field
             distance in AU                     escape velocity
                           
     1 AU                                                42.119 km/sec
                          4 AU                                                21.06 km/sec
  
                      16 AU                                                              10.53 km/sec
                        64 AU                                                               5.266 km/sec
                           
   89.7 AU                                              4.448 km/sec

     
  1 AU is approximately 1.5 x 108 km
                              

                        


Pioneer 10 data
December 2005
     speed 12.51 km/s
     location 89.7 AU
     mass- 260 kg
     anomalous acceleration towards the sun- 8.74 +/- 1.33 x 10-10 m/s
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