I Can anyone tell me if 2009 MS9 is prograde or retrograde?

  • I
  • Thread starter Thread starter Edward Barrow
  • Start date Start date
  • Tags Tags
    Retrograde
AI Thread Summary
2009 MS9 is confirmed to have a prograde orbit, with an inclination of 68.07923°. Orbits with inclinations greater than 90° are classified as retrograde, while those between 0° and 90° are prograde. The information was sourced from the JPL Small-Body Database Browser. Despite some visual perspectives suggesting a retrograde appearance, the inclination clearly indicates its prograde status. This clarification aids in understanding the dynamics of extreme trans-neptunian objects.
Edward Barrow
Messages
25
Reaction score
1
I'm constructing a theory on the origin of extreme trans-neptunian objects.

Can anyone tell me if 2009 MS9 is prograde or retrograde in its orbit? (and show me where you found this information out). I can't for the life of me find it anywhere.

Thanks.
 
Astronomy news on Phys.org
2009 MS9 is prograde in its orbit. Inclinations greater than 90° describe retrograde orbits, thus, an inclination of between 0° and 90° means the orbiting body has a prograde orbit. 2009 MS9 has an inclination of 68.07923°.

Source: JPL Small-Body Database Browser - 418993 (2009 MS9)
 
Last edited:
  • Like
Likes Edward Barrow
Big thanks Glitch! That makes things so much clearer.
 
Is a homemade radio telescope realistic? There seems to be a confluence of multiple technologies that makes the situation better than when I was a wee lad: software-defined radio (SDR), the easy availability of satellite dishes, surveillance drives, and fast CPUs. Let's take a step back - it is trivial to see the sun in radio. An old analog TV, a set of "rabbit ears" antenna, and you're good to go. Point the antenna at the sun (i.e. the ears are perpendicular to it) and there is...
3I/ATLAS, also known as C/2025 N1 (ATLAS) and formerly designated as A11pl3Z, is an iinterstellar comet. It was discovered by the Asteroid Terrestrial-impact Last Alert System (ATLAS) station at Río Hurtado, Chile on 1 July 2025. Note: it was mentioned (as A11pl3Z) by DaveE in a new member's introductory thread. https://www.physicsforums.com/threads/brian-cox-lead-me-here.1081670/post-7274146 https://earthsky.org/space/new-interstellar-object-candidate-heading-toward-the-sun-a11pl3z/ One...
Back
Top