File:Slope parameter G.png

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Original file (1,057 × 603 pixels, file size: 22 KB, MIME type: image/png)

Captions

Captions

Relation between slope parameter G, and the opposition surge. Larger G corresponds to a less pronounced opposition effect. For most asteroids, a value of G=0.15 is assumed, corresponding to an opposition surge of 0.3 mag.

Summary

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Description
English: The opposition effect, the brightening of asteroids at very small phase angles, is in practise modelled by a two parameter system, the H-G magnitude system. Here, H is the absolute magnitude of the asteroid, and G is called the slope parameter.
Date
Source Own work
Author Renerpho

Following the description in Figure 1 of https://www.britastro.org/asteroids/dymock4.pdf, the graphic represents the intercept of the linear portion of the phase curve (phase angle 10-20°) with the y-axis for different values of G.

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Date/TimeThumbnailDimensionsUserComment
current09:36, 13 January 2019Thumbnail for version as of 09:36, 13 January 20191,057 × 603 (22 KB)Renerpho (talk | contribs)Decimal point instead of comma, for English Wikipedia
23:39, 12 January 2019Thumbnail for version as of 23:39, 12 January 20191,057 × 603 (22 KB)Renerpho (talk | contribs)Resize, correct sign in formula
21:46, 12 January 2019Thumbnail for version as of 21:46, 12 January 20191,209 × 603 (25 KB)Renerpho (talk | contribs)User created page with UploadWizard

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