Gravity is backwards?

General help that does not fall into a more specific category

Gravity is backwards?

Postby gustolph » Wed May 02, 2018 12:53 pm

So I've loaded up GMAT R2017a with the intent of simulating an asteroid's close encounter with Earth.

I created an ecliptic coordinate frame (object-referenced Sun-to-Earth) and changed the default spacecraft's orbital elements to the latest MPC orbital elements of the asteroid in question (2006 RH120).

In the propagator Ive changed the primary body to "none" and included "Sun, Earth, and Luna" as point masses. (There is no Sun gravity file, so I can't select it)

In the mission tab I propogate the "spacecraft" forward until I hit stop. The trajectory of the asteroid slowly but steadily spirals AWAY from the Sun. There is no solar radiation pressure, nor are there any thrusters attached to the Spacecraft.

What did I break?
gustolph
 
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Joined: Wed May 02, 2018 12:19 pm

Re: Gravity is backwards?

Postby gustolph » Thu May 03, 2018 12:19 pm

Actually I'm like 46% sure its because I dont have a Sun gravity file as the "Central Body".
Can someone send me theirs?
gustolph
 
Posts: 6
Joined: Wed May 02, 2018 12:19 pm


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