Re: most mileage

JAY RESPLER (jrespler@InJersey.com)
Fri, 10 Oct 1997 02:32:07 -0400 (EDT)

On Thu, 9 Oct 1997, Leo Barhorst wrote:
> > other day?  What man made object would have the most mileage?  And how much 
> > mileage would that be....

> Question 1:
> The oldest sat still in orbit is Vanguard 1.
> Launched 17th march 1958 in a 650 by 3968 km orbit, period 134.2 min.
This data is
> not much different than the data for July 1, 1993: 653 by 3870 km, 133.2 min.

> The mean orbit is then: 651 by 3920 km and 133.7 min.

>from 17-3-1958 till 8-10-1997 is 14.450 days and 1440 min/day; 133.7
>min/revelution
>we get: 14.450*(1440/133.7)=1.676.157 revs since launch

I get 155,632 revs.  What am I doing wrong?


> total travelled distance:
> 1.676.157 * 53.248 km = 89.553.716.000 km or almost 60 milliard
(billion) miles. 

> The oldest satellite in an almost circular orbit is Tiros 1 in an orbit
>of 658 by > 695 km and a period of 98.3 min and launched 01-04-1960. 

> total distance travelled: 200.750 * 44.283 = 8.898.812.200 km or about a
>tenth of > the total distance travelled by Vanguard 1. 

Excuse me for not doing the math.  This is just off the top of my head.
If Vanguard make 10.8 orbits / day for 39 years, and Tiros 14.6 for 37 
years, why does Tiros cover only 1/10 the distance?
200750 * 44283 = 8,889,812,250

How about trying Explorer 7, which makes almost as many revs and has been 
up 1 year longer?  It is also just 1 year less than Vanguard.


Vanguard 1
1 00005U 58002B   97276.06921168 +.00000061 +00000-0 +68085-4 0 02399
2 00005 034.2455 170.1427 1861039 179.7958 180.3697 10.81859417305473
Explorer 7
1 00022U 59009A   97275.82304706 +.00000750 +00000-0 +13446-3 0 01262
2 00022 050.2975 064.9938 0233118 185.1496 174.7035 14.62051059995435
Tiros 1
1 00029U 60002B   97275.71668023 -.00000012 +00000-0 +32846-4 0 05045
2 00029 048.3923 024.0005 0028009 204.7275 155.2289 14.65772331997342


Jay Respler

www.injersey.com/Media/SkyNotes/

--
              JRespler@InJersey.com  
    Satellite Tracker * Early Typewriter Collector
               Freehold, New Jersey