Questions tagged [retrograde-orbit]

An orbit with an equatorial inclination between 90° and 180°, that is, an orbit in the opposite direction of the rotation of the body being orbited.

Filter by
Sorted by
Tagged with
22
votes
3answers
4k 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 ...
1
vote
1answer
78 views

Orion Exploration Mission-1; clarification and additional trajectory information?

This September 2017 video NASA | Exploration Mission-1 – Pushing Farther Into Deep Space is over a year old. I found some aspects interesting and wonder if more details about this trajectory are now ...
5
votes
1answer
154 views

How much does the tidal effect affect satellites in a retrograde orbit?

How much more unstable are satellites in retrograde then a pro-grade orbit? Does the stability of a retrograde orbit increase with altitude? This answer said this orbit is unstable and made me think,...
3
votes
0answers
79 views

How would propagation differ between a GEO and a Retrograde GEO?

A Binary Equatorial Synchronous Retrograde Orbit is an orbit that would travel in the opposite direction of GEO and would pass over the same point on Earth twice per day at the same altitude of GEO. ...
5
votes
1answer
91 views

Does a retrograde launch impact the return booster propellant requirements, as compared to prograde?

Space-X's latest launch, of SAOCOM-1A, was a retrograde launch from Vandenberg, with a landing back at Landing Zone 4 - at Vandenberg. A retrograde launch requires more energy (to counteract the ...
4
votes
2answers
295 views

Is It Easier To Hohmann Transfer to a Retrograde Satellite or to a Prograde Satellite?

Suppose I start on Earth and make a Hohmann transfer to Neptune. After traveling along my initial trajectory, I arrive at the Neptunian system. However, the objects in the Neptune system are going ...
3
votes
1answer
87 views

Should a Europa clipper use a retrograde orbit?

A "clipper", as I understand it, is orbiting a planet to repeatedly flyby one of its moons. Mariner 10 orbited the Sun to fly by Mercury 3 times. Should clippers in general use retrograde orbits in ...
9
votes
1answer
223 views

What's the floor for stable retrograde lunar orbits?

I've been playing with lunar retrograde orbits in an orbital simulator. The retrograde lunar orbits with apolunes below 40,000 km altitude are pretty stable. They seem resistant to distortion from ...
3
votes
2answers
186 views

What difficulties would there be for a probe to attain a high retrograde solar orbit?

How would one go about sending a probe on an orbit that goes around the Sun in the opposite direction as most planets? Specifically, a rather high orbit - something like Pluto's. What happens to ...
10
votes
3answers
661 views

Why is MOM in a very retrograde orbit?

A recent question/discussion on this site brought out the interesting fact that most probes around Mars are in Sun synchronous near polar orbit. The ISRO web-site for the Mars Orbiter Mission writes ...
6
votes
4answers
705 views

Soft landing by gravity assist?

Could a trajectory exist that gave an object kinetic energy relative to the Earth/Moon that somehow passes zero as the Earth moved across the other's path, tugging on it? And having it happen at a ...
5
votes
2answers
1k views

How exactly does the inclination and direction (specifically retrograde) of orbit affect the velocity I need to attain orbit?

this is my first question here; and a lot of what I've learnt so far has been pretty much self taught so I thought I best hear from professionals. :) First let me set the scene as to what I am trying ...
11
votes
1answer
1k views

Would a satellite in retrograde orbit have a different speed than it would in prograde?

I understand that more power is required to launch a satellite into retrograde orbit, but once it's up there how much does the orbit differ from the more usual West to East? Would you still use $v\...
10
votes
2answers
621 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 ...