Satellite observing and the autokinetic illusion

From: Frits Westra (fw-nx@xs4all.nl)
Date: Fri Sep 01 2006 - 04:25:19 EDT

  • Next message: bpurcell@pdq.net: "Re: Satellite observing and the autokinetic illusion"

    Hello all,
    
    The autokinetic illusion is generally described as the illusion of a  
    _fixed_ light moving when gazed at steadily against a dark background.
    
    However, I regularly receive reports from members of the public who appear  
    to have observed a passing satellite (often the ISS) at night, but who are  
    reporting strange (impossible) non-linear movements of the satellite. E.g.  
    jumping back and forth and zizagging along the track.
    
    Since the autokinetic illusion is generally associated with _motionless_  
    light sources, I would be pleased to hear if any of you knows of any  
    information or articles on autokinetic illusions and _moving_ targets,  
    such as satellites.
    
    Many thanks in advance for your suggestions.
    
    Best wishes,
    
    Frits Westra
    
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