Re: OGO 1

From: Art Glick (
Date: Wed Jan 16 2008 - 05:44:45 UTC

  • Next message: B Gimle @ComHem: "Re: OGO 1"

    Interestingly, when you click on the date in Heavens Above for 
    details, it generates the following error (Chris Peat, please note)...
    Microsoft VBScript runtime error '800a01a8'
    Object required: ''
    /PassDetails.asp, line 332
    Both old and deep space objects are quite interesting, and this one 
    is both.  Anyone care to guess at the magnitude during a perigee pass?
    >Date: Tue, 15 Jan 2008 23:34:10 -0500
    >From: Curtis Haase <>
    >To: SeeSat-L <>
    >Subject: OGO 1
    >Has anyone observed OGO 1 (00879, 64-054A)?
    >This old spacecraft is in a highly eccentric orbit (e~0.8)
    >with a long period (over 2.6 days).  I noticed that it makes
    >a perigee pass over the middle of the US in a dark sky on the
    >morning of Jan 19 (perigee around 11:24 UTC, height 9800 km).
    >This is one of those "ultra-deep space" objects that shows a
    >large difference in ephemeris output depending on whether the
    >TLE propagator does (or does not) apply deep-space perturbation
    >offsets at epoch.  In the case of the Saturday AM perigee pass,
    >I found that the two methods give a similar path among the
    >stars, but with a large time difference (over 11 minutes!).
    >Has anyone actually observed OGO 1 to see which approach is
    >Curtis Haase
    >Dallas TX
    Almost Heaven Group
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