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To: kech who wrote (141046)1/12/2006 12:32:55 PM
From: Clarksterh  Read Replies (1) | Respond to of 152472
 
When I Google "Sirius LEO GEO" I find this link though that suggests that the Sirius satellites "move". Maybe this is what you mean by your inclined orbit?

Sirius is definitely not a LEO (Low Earth Orbiter) by any means. And it has a 24 hr period so it is Geo. But it may also have an eccentric orbit in addition to inclination in order to stay in the northern hemisphere longer each orbit. I'll have to check.

Inclination = orbital plane different than the plane of the equator

Eccentricity = a measure of how non-circular the orbit is with the more non-circular the orbit having a higher eccentricity.



To: kech who wrote (141046)1/13/2006 1:08:27 AM
From: Clarksterh  Respond to of 152472
 
When I Google "Sirius LEO GEO" I find this link though that suggests that the Sirius satellites "move". Maybe this is what you mean by your inclined orbit?

I was correct. Sirius is in a 24 hour orbit (therefore geosynchronous), but is substantially inclined and hugely eliptical (therefore not geostationary) to increase hang time in the northern hemisphere. See Comm Sats/Other:

celestrak.com

Clark


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