Tom,
AO-7 was launched on November 14, 1974, that's 15,935 days ago. Multiplying 15,935 by it's current mean motion of 12.53633150 revs/day gets you 199,766 orbits. The orbit number is currently 99,630, so there is a bit of error there. The mean motion should have very slightly decreased over the past 43 years as the minimal atmospheric drag ever so slightly slows it down.
73,
Paul, N8HM
On Mon, Jul 2, 2018 at 10:03 AM, Tom Schuessler tjschuessler@verizon.net wrote:
12.5×365×45 equals 205,312..5. Based on that you think it had Brolley a diameter the second time already but it might have been hiring slower when originally launched.
Sent from my iPhone
On Jul 2, 2018, at 02:47, Alan wa4sca@gmail.com wrote:
Tom,
According to the Keps, AO-7 makes 12.54 orbits per day. It will hit
99999
on the 30th or so. You can use the Preview function to find out exactly when.
73,
Alan WA4SCA
<-----Original Message----- <From: AMSAT-BB [mailto:amsat-bb-bounces@amsat.org] On Behalf Of <tjschuessler@verizon.net <Sent: Sunday, July 01, 2018 23:56 PM <To: 'AMSAT BB' amsat-bb@amsat.org <Subject: [amsat-bb] AO-7 orbit count. < <Now I see looking at SatPC32 that it shows AO-7 in the 99,625 range in orbit <count. If memory serves me right though, doesn't the TLE orbit count
roll
<over at 99,999 (Just like a car odometer), so that would mean that we
would
<be coming up to the 200,000th rev is that right? If I am right, then
this
<will be coming up in less than a month. Does anybody know exactly when that <will be? I am doing a presentation for a local club and would like to throw <out that fact if I could. Also the day of that event would be good AO-7 <operating day I would think. < <73 < <Tom Schuessler, N5HYP <EM12ms < < < <_______________________________________________ <Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available <to all interested persons worldwide without requiring membership.
Opinions
<expressed <are solely those of the author, and do not reflect the official views of AMSAT- <NA. <Not an AMSAT-NA member? Join now to support the amateur satellite <program! <Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via AMSAT-BB@amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb