[amsat-bb] AO-7 orbit count.

[Bob]

Hum,

Don't know what the thought of viewing AO-7 caught my attention, but it
did.  So I did some quick math:

In round numbers AO-7 is about 0.06 arc seconds across (1450 KM orbit, 0.4
meters diameter).  That's the theoretical resolving power of a telescope
with a 16,000mm focal length and magnification of about 500, constructed
with perfect optics and operated in a vacuum.  So I wouldn't hold my breath
thinking you can observe it with a ground based telescope.

But maybe as a point of light?  N2YO.com doesn't even list a magnitude for
visible passes.

73, Bob, WB4SON




On Mon, Jul 9, 2018 at 7:38 AM, Samudra Haque [TTLLC] <
sehaque at tekterrain.com> wrote:

> Well, it is a well known that in some universes a double negative results
> in a positive result. I'm interested in taking an attempt at imaging OSCAR
> satellites. Any tips from the community for say, AO-7, using an optical
> telescope and a DSLR mounted at its focus?
>
> Samudra N3RDX.
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Greg D
> Sent: Friday, July 6, 2018 8:07 PM
> To: APBIDDLE at MAILAPS.ORG; 'Ray Hoad' <ray.hoad at mypbmail.com>;
> amsat-bb at amsat.org
> Subject: Re: [amsat-bb] AO-7 orbit count.
>
> With any luck, AO-7 will outlive (or perhaps it already has) the IBM punch
> card that caused the whole 5-digit thing in the first place.  Of the
> constants in the universe, the first one is 42, immediately followed by
> either 72 or 80, depending on your background.  We apparently had
> programmers define the KEPs format, as both lines are 71 characters long...
> :)
>
> Greg  KO6TH
>
> (For source code, columns 73-80 were reserved for sequence numbers, so
> that when you dropped your deck, the cards could be reassembled in the
> proper order.)
>
>
> Alan wrote:
> > Tom Clark, K3IO (ex-W3IWI) once observed that AO-7 was the only
> > amateur satellite known to have suffered two catastrophic failures,
> > thereby returning it to service.  Hi HI
> >
> > 73,
> >
> > Alan
> > WA4SCA
> >
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