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Thread: What is trajectory Deflection Angle

  1. #1 What is trajectory Deflection Angle 
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    What is trajectory Deflection Angle

    Flyby anomaly - Wikipedia, the free encyclopedia

    Date 12/8/1990 12/12/1992 01/23/1998 08/18/1999 03/04/2005 08/02/2005 11/13/2007 11/13/2009 10/9/2013
    Speed at infinity, km/s 8.949 8.877 6.851 16.01 3.863 4.056
    Speed at perigee, km/s 13.738 --- 12.739 19.03 10.517 10.389 12.49 13.34
    Impact parameter, km 11261 12850 8973 22680.49 22319
    Minimal altitude, km 956 303 532 1172 1954 2336 5322 2483
    Spacecraft mass, kg 2497.1 730.40 4612.1 2895.2 1085.6 2895 2895
    Trajectory inclination to equator, degrees 142.9 138.9 108.8 25.4 144.9 133.1
    Deflection angle, degrees
    47.46 51.1 66.92 19.66 99.396 94.7
    Speed increment at infinity, mm/s 3.920.08 -4.60 1.00 13.460.13 −21 1.820.05 0.020.01
    Speed increment at perigee, mm/s 2.560.05 7.210.07 −1.70.9 0.670.02 0.0080.004 ~0 −0.0040.044
    Gained energy, J/kg 35.10.7 92.20.9 7.030.19


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  3. #2  
    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by Anderson et al.
    the deflection angle (DA) is the angle between the incoming and outgoing asymptotic velocity vectors,
    Anomalous Orbital-Energy Changes Observed during Spacecraft Flybys of Earth (PDF)
    There is a picture on the first page that might make it clearer.

    I haven't attempted to follow it, but there is some discussion of this here: Anomaly predictions in for JUNO flyby of October 9 2013


    Without wishing to overstate my case, everything in the observable universe definitely has its origins in Northamptonshire -- Alan Moore
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  4. #3  
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    1.) Will it come data regarind Juno's flyby anomaly ?
    2.) What is the inclination of the tracjetory of Juno ?
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  5. #4  
    Moderator Moderator Markus Hanke's Avatar
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    Quote Originally Posted by Bjarne View Post
    What is trajectory Deflection Angle
    The deflection angle is the total angle by which a trajectory is changed :



    This is for a ray of light, but the principle is a general one - in the above, the trajectory deflection angle is .
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