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Summary
| Description |
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 |
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Licensing
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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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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 12:27, 31 October 2018 | | 2,322 × 600 (703 KB) | Rafflesgluft | Added Venus orbit and Sun-Earth L1 to diagram for reference |
| 09:26, 19 October 2018 |  | 2,322 × 600 (638 KB) | Rafflesgluft | Cropped excess righthand border | |
| 08:43, 19 October 2018 |  | 2,400 × 600 (640 KB) | Rafflesgluft | {{subst:Upload marker added by en.wp UW}} {{Information |Description = {{en|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 disco... |
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