Linked Questions

24
votes
3answers
6k views

Why use a retrograde orbit?

I've been looking around and saw on What is the highest inclination orbit ever attained from a Cape Canaveral launch? a question about launching into retrograde orbit. Of course, due to range safety ...
8
votes
2answers
2k views

How are military satellites with (apparently) classified TLEs still showing up on sat map websites?

As I first noted in this comment I couldn't get TLEs for the recently launched OFEQ-11 spy satellites from space-track.com. When I looked at Search Resuls: OFEQ 11 Satellite details 2016-056A NORAD ...
7
votes
2answers
2k views

Negative impact of having the launch pad away from the Equator

I imagine a satellite meant for reaching a geostationary orbit will benefit most from it, but being near the Equator is surely an advantage to any space launch (right?). However, what's the impact ...
10
votes
2answers
824 views

How are retrograde orbits attained?

If a satellite is to be inserted into a retrograde orbit (opposite to Earth rotation direction) is it accelerated straight in the desired "westwards" direction until (after overcoming Earth rotation ...
8
votes
1answer
547 views

Are there any dog-leg hot-spots? Where are dog-leg maneuvers used most frequently?

Dog-leg maneuvers are nicely explained in @JakeBlocker's excellent answer. If you go there now (and hopefully come back here) you can see a diagram of a dog-leg maneuver along with a comparison to an ...
4
votes
1answer
760 views

Are we changing Earth's rotation?

Can rockets launching change Earth's rotation, and can going into orbit do the same?
3
votes
3answers
569 views

Are there terms for Earth orbits with rational number multiples of 1 sidereal day?

An Earth orbit with a period of 1 sidereal day (and zero inclination) is a geosynchronous orbit, orbits slightly above and below that are supersynchronous and subsynchronous orbits, and a Molniya ...
1
vote
1answer
1k views

Satellite Launch Direction

Most rockets hoping to achieve earth orbit are launched West -> East and from near the equator to gain maximum advantage from the spin of the Earth. I know the launches often also are deliberately ...
3
votes
1answer
204 views

What forces a spacecraft, returning from Earth orbit, to synchronize with Earth spin?

This seems like a banal question, but the more I think about it, the less I understand the mechanics of it. Does the progressively denser atmosphere pick up the spacecraft and carries it along the ...
1
vote
0answers
62 views

Why no Ofeqs between 11 and 16?

Wikipedia's Ofeq; Launch History lists Ofeq 1 through 11 and then 16. It does not mention a 12, 13, 14 or 15. Were they so stealthily launched that nobody knows about them, or skipped, had non-Ofeq ...