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All About Asteroids Michelle Kirchoff Southwest Research Institute

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Presentation on theme: "All About Asteroids Michelle Kirchoff Southwest Research Institute"— Presentation transcript:

1 All About Asteroids Michelle Kirchoff Southwest Research Institute
Institute for the Science of Exploration Targets South pole of Moon with Asteroid Ida Credit: Peter van der Haar

2 What are Asteroids? Large moon compared to Earth
Moon is moving away, thus Earth rotated faster 2

3 Where are Asteroids? Large moon compared to Earth
Moon is moving away, thus Earth rotated faster 3

4 Where are Asteroids? Emphasize not what is seen in movies. Picture from ISS by astronaut Don Pettit 4

5 Types of Asteroids Large moon compared to Earth
Moon is moving away, thus Earth rotated faster 5

6 How Did We Get This Info? NEOWISE and other Earth-based search programs Large moon compared to Earth Moon is moving away, thus Earth rotated faster 6

7 How Did We Get This Info? Spectrum from Earth-based telescopes
Large moon compared to Earth Moon is moving away, thus Earth rotated faster 7

8 How Did We Get This Info? Dedicated Spacecraft missions Near to Eros
Hayabusa to Itokawa Dawn to Vesta & Ceres Large moon compared to Earth Moon is moving away, thus Earth rotated faster OSIRIS-REx to Bennu 8

9 Why Study Asteroids? 9

10 Why Study Asteroids? Impact Hazard Chelyabinsk (~500 kt, 20 m) 10

11 Why Study Asteroids? Exploration/Mining
Other metals: iron, nickel, magnesium, gold. 11

12 Why Study Asteroids? Exploration/Mining
Other metals: iron, nickel, magnesium, gold. 12

13 Why Study Asteroids? Building Blocks of Planets & Clues to Evolution
Growing planets Asteroids Very Elongated Elongation of Orbit Very Circular (Closer) Distance From Sun (Further) Animation from Alessandro Morbidelli

14 What Do We Still Need to Learn?
Complete census of Near Earth Asteroids How do asteroids evolve? Exact compositions & how does that relate to life and planetary formation and evolution? ??

15 Thank you! Questions?

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