|
The Bond albedo is the fraction of power in the total electromagnetic radiation incident on an astronomical body that is scattered back out into space. This takes into account all wavelengths.
It is an important quantity for characterising a planetary body's energy balance.
For objects in the solar system, the main contribution comes from visible light because the majority of solar output is in this range. Like most albedos the Bond albedo is a value between 0 and 1. Albedo is a ratio of scattered to incident electromagnetic radiation power, most commonly light. ...
The Bond albedo (A) is related to the geometric albedo (p) by the expression The geometric albedo of an astronomical body is the ratio of its total brightness at zero phase angle to that of an idealised fully reflecting, diffusively scattering (Lambertian) disk with the same cross-section. ...
-
where (q) is termed the phase integral and is given in terms of the directional scattered flux I(α) into phase angle α (averaged over all wavelengths and azimuthal angles) as -
The phase angle α is the angle between the source of the radiation (usually the Sun) and the observing direction, and varies from zero for light scattered back towards the source, to 180° for observations looking in the direction of the source.
Because bodies in the outer solar system are always observed at very low phase angles from the Earth, the only reliable data for measuring their Bond albedo comes from spacecraft.
The Bond albedo is named for the American astronomer George Phillips Bond (1825-1865), who originally proposed it. It was originally defined for spherical bodies, but is also applicable for irregular objects. George Phillips Bond (May 20, 1825 – February 17, 1865) was an American astronomer. ...
Examples
The Bond albedo may be greater or smaller than the geometric albedo, depending on surface and atmospheric properties of the body in question. Some examples [1]: -
-
Note: This article contains special characters. ...
Adjective Venusian or (rarely) Cytherean (*min temperature refers to cloud tops only) Atmospheric characteristics Atmospheric pressure 9. ...
Earth (often referred to as the earth) is the third planet in the solar system in terms of distance from the Sun, and the fifth largest. ...
Bulk composition of the moons mantle and crust estimated, weight percent Oxygen 42. ...
For the Roman god, see Mars (mythology). ...
In Greek mythology Enceladus was one of the Gigantes. ...
Adjective Plutonian Atmospheric characteristics Atmospheric pressure 0. ...
See also Albedo is a ratio of scattered to incident electromagnetic radiation power, most commonly light. ...
External links - discussion of Lunar albedo
References - ^ http://hyperphysics.phy-astr.gsu.edu/hbase/phyopt/albedo.html
- ^ See the discussion here for explanation of this unusual value above one.
| 
Feeds |
Contact