Re: Orbit Number?

6 Jan 2025


      Click on the calendar icon, then click on the date you want (including the past) on the calendar that pops up. 
Steve AI9IN
From: "Jon via AMSAT-BB" [email protected] 
To: "Nico Janssen" [email protected] 
Cc: "John Lutz" [email protected], "amsat-bb" [email protected], "christy" [email protected] 
Sent: Monday, January 6, 2025 6:45:45 AM 
Subject: [AMSAT-BB] Re: Orbit Number?
This page gives the orbit number at a glance before the pass is over: [ https://mail.amsat.org.ar/pass.htm | https://mail.amsat.org.ar/pass.htm ] 
But I do not see a way to find one retrospectively from that page.
73 
Jon, VU2JO
On Mon, Jan 6, 2025 at 5:03 PM Nico Janssen via AMSAT-BB < [ mailto:[email protected] | [email protected] ] > wrote:
Of course the 18th SDS keeps track of the orbit numbers. And they publish these 
numbers in all their orbital parameters, like TLEs. That's why satellite tracking 
programs can show you the orbit number.
Note that there are several different definitions for the orbit number. Depending 
on the definition used by the source of your orbital parameters, the number may 
have an offset of 1. Therefore most people don't use orbit numbers. They simply 
use the date/time as reference.
73, 
Nico PA0DLO
On 06-01-2025 06:12, John Lutz via AMSAT-BB wrote:
BQ_BEGIN
Thank you to everyone for working through this for me. It's interesting that the ISS has made so many revolutions around the earth. I was unaware of that.
Regarding orbit numbers, I suppose that I thought that the U.S. Space Command (or some other government agency) perpetually kept track of that kind of thing.
Thank again.
John, N9JL
On Monday, January 6, 2025 at 01:02:13 AM UTC, christy via AMSAT-BB [ mailto:[email protected] | [email protected] ] wrote:
per the question below:
using SatPC32/winlisten, using daily-bulletin.txt keps it was 48987
73 Christy KB6LTY
--------------------
Do any of you happen to know the orbit number for the ~05:00 UTC ISS 
pass over North America on 5 January (late last night local time)? My 
son had the best image capture he's ever gotten (the one with the 
Japanese children in a classroom). I would like to have the orbit number 
for his archives.
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Steve Kristoff

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