Re: Using an ETX-70 for Visual Satellite Observing

From: Marco Langbroek (
Date: Mon Mar 09 2009 - 18:34:56 UTC

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    Hi Peter,
    I sometimes use my ETX-70 for positional measurement on objects that are a bit 
    too faint for my photographic camera, in combination with a stopwatch and Ted's 
    ObsReduce software.
    I do not let it track - I just aim the scope by hand to a preselected part of 
    the predicted track, then wait and clock the sats as they pass through the FOV 
    and inbetween stars in the FOV. I have the relevant piece of sky printed out 
    with me behind the scope and mark the star pairs used for the positions. I use 
    it with a 26 mm eyepiece (13.5x), it has a FOV of some 4 degrees then and a 
    stellar limiting magnitude beyond +9.5. The ETX-70 is a very nice compact wide 
    field scope for this kind of work.
    - Marco
    Dr Marco Langbroek  -  SatTrackCam Leiden, the Netherlands.
    Cospar 4353 (Leiden):   52.15412 N, 4.49081 E (WGS84), +0 m ASL
    Cospar 4354 (De Wilck): 52.11685 N, 4.56016 E (WGS84), -2 m ASL
    Station (b)log:
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