# Mechanics - Orbits

Watch
Announcements
#1
I have a question:

An astroid is observed to orbit the Sun in an elliptical orbit. If theta is the angle between the line joining the Sun at the astroids perihelion and the astroid in orbit, an astronomer finds that when theta = Pi/3 the astroid is 2.3 AU from the Sun. The astronomer also notes that the period of the orbits 8 years.

What distance is the astroid from the Sun at aphelion?

So I can work out 'a' semi-major axis using t=a^(3/2).
And I know the aphelion is at 'a+ae' but how do I find 'e' eccentricity?
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### Current uni students - are you thinking of dropping out of university?

Yes, I'm seriously considering dropping out (147)
14.54%
I'm not sure (43)
4.25%
No, I'm going to stick it out for now (303)
29.97%
I have already dropped out (26)
2.57%
I'm not a current university student (492)
48.66%