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Division F Commission 15 WG - TG On Asteroid Magnitudes

Chair

Karri Muinonen

University of Helsinki
Department of Physics
Gustaf Hällströmin katu 2a
PO Box 64
00014 Helsinki
Finland

Phone: +358 +358 9 191 22941
Fax: +358 +358 9 191 50610
Organization website: http://www.physics.helsinki.fi/index.shtml

Last updated:
March 20, 2014

Description

The fundamental role played by the absolute magnitude in numerous areas of research is well known. An accurate asteroid magnitude phase function is needed to reduce asteroid observations. The Working Group is worrying about the very poor state of the H values listed in the major databases, by the potential consequences on the results of a number of recent investigations concerning the size-frequency distribution of the asteroid population, and inferences on the most likely values of asteroid collisional impact strengths. The past Task Group of C15 have created alternate formulations of the H, G1, G2 magnitude phase function to replace the current (H, G) phase function which, if used on properly transformed and calibrated data will eventually result in a catalog of accurate H values. A 2010 paper published on Icarus has suggested that the new proposed photometric system is significantly better than the (H,G) system. The working group will address further the issue.


Group Members (10)


Under

Division F Commission 15 Physical Study of Comets & Minor Planets

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Office for Astronomy Development

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International Year of Astronomy

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