Positions_of_Near_Earth_Asteroids_at_time_of_discovery.png
Summary
| Description |
English:
This diagram shows impact of the
opposition effect
on the discovery of
Near-Earth objects
. Over half (53%) of the discoveries were made in 3.8% of the sky, in a 22.5°
cone
facing directly away from the Sun, and the vast majority (87%) were made in 15% of the sky, in a 45°
cone
facing away from the Sun. Only 13% of the discoveries fell outside of these regions.
Sizes and distances are to scale. Units: LD . The cone angle is the angle between the cone surface and cone axis. Projection of data onto a 2D surface preserves distances between asteroid position and both Sun and Earth . It also preserves the solar elongation (angle between Sun , Earth and asteroid ) and phase (angle between Sun , asteroid and Earth ). Relative distances and angles between asteroids are not preserved by the projection . Discoveries inside the 22.5° cone indicated in lime green. Discoveries inside the 45° cone indicated in yellow. Discoveries outside the 45° cone indicated in orange, notably including 99942 Apophis , which is marked. This diagram is intended for the following articles: |
| Date | |
| Source |
OpenOfiice Calc (4.1.3) and MSpaint (1803) using NASA JPL NEO Earth Close Approach data (
https://cneos.jpl.nasa.gov/ca/
)
|
| Author | Rafflesgluft |
- Other information
Licensing
|
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License , Version 1.2 or any later version published by the Free Software Foundation ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License . |
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| Annotations | This image is annotated: View the annotations at Commons |
