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File:Positions of Near Earth Asteroids at time of discovery.png

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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.

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Date
Source

OpenOfiice Calc (4.1.3) and MSpaint (1803) using NASA JPL NEO Earth Close Approach data (https://cneos.jpl.nasa.gov/ca/)

Previously published: unpublished
Author Rafflesgluft
Other information
English: 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.

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7 July 2018

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Date/TimeThumbnailDimensionsUserComment
current12:27, 31 October 2018Thumbnail for version as of 12:27, 31 October 20182,322 × 600 (703 KB)RafflesgluftAdded Venus orbit and Sun-Earth L1 to diagram for reference
09:26, 19 October 2018Thumbnail for version as of 09:26, 19 October 20182,322 × 600 (638 KB)RafflesgluftCropped excess righthand border
08:43, 19 October 2018Thumbnail for version as of 08:43, 19 October 20182,400 × 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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