Minimum orbit intersection distance

High school (ages 12+)
Space & Astronomy

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/minimum-orbit-intersection-distance

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the definition of MOID?The minimum distance between the osculating orbits of two celestial bodies
2. What does MOID stand for and what does it measure?MOID means Minimum Orbit Intersection Distance. It is the shortest distance between the orbits of two celestial bodies.
3. Why do scientists look at MOID when studying asteroids?MOID helps find objects that might come close to Earth. If the MOID is less than 0.05 AU (about 7.5 million km), the asteroid is considered potentially hazardous.

Osculating Elements: A set of orbital parameters that describe an object's instantaneous orbit at a specific point in time.
Numerical Integration: A computational method used to approximate solutions to differential equations, often applied to predict orbital trajectories.
Absolute Magnitude (H): A measure of an astronomical object's intrinsic brightness, independent of its distance from Earth.