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Albedo (/ æ l ˈ b iː d oʊ / al-BEE-doh; from Latin albedo 'whiteness') is the fraction of sunlight that is diffusely reflected by a body. It is measured on a scale from 0 (corresponding to a black body that absorbs all incident radiation) to 1 (corresponding to a body that reflects all incident radiation).
The albedo of several types of roofs (lower values means higher temperatures). Reflective surfaces, or ground-based albedo modification (GBAM), is a solar radiation management method of enhancing Earth's albedo (the ability to reflect the visible, infrared, and ultraviolet wavelengths of the Sun, reducing heat transfer to the surface).
Cloud albedo is a measure of the albedo or reflectivity of a cloud. Clouds regulate the amount of solar radiation absorbed by a planet and its solar surface irradiance . Generally, increased cloud cover correlates to a higher albedo and a lower absorption of solar energy .
The reflectance function described by these can then be extrapolated to zero phase angle to obtain an estimate of the geometric albedo. For very bright, solid, airless objects such as Saturn's moons Enceladus and Tethys, whose total reflectance (Bond albedo) is close to one, a strong opposition effect combines with the high Bond albedo to give ...
Color variations provide clues to the composition of surface materials. The bright areas are reddish-ochre in color, and the dark areas appear dark gray. A third type of area, intermediate in color and albedo, is also present and thought to represent regions containing a mixture of the material from the bright and dark areas. [5]
The darkest ones are related to the C-group, with an albedo below 0.1. These are the "primitive" P-type ( 259 Aletheia , 190 Ismene ), which differ from the "metallic" M-type ( 16 Psyche ) with an intermediate albedo of 0.10 to 0.30, and from the bright "enstatite" E-type asteroid , mostly seen among the members of the Hungaria family in the ...
Highest albedo: LTT 9779 b: LTT 9779: 0.79 ± 0.15 [55] This is the value for western dayside region, with the overall albedo of dayside being 0.50 ± 0.07. [55] For comparison, Earth is 0.3 and Venus is 0.76. Lowest albedo TrES-2b: GSC 03549-02811: Geometric albedo < 1% [56] Best-fit model for albedo gives 0.04% (0.0004). [46] Youngest DH ...
Salacia has the lowest albedo of any known large trans-Neptunian object. [8] According to the estimate from 2017 based on an improved thermophysical modelling, the size of Salacia is slightly larger at 866 km and its density therefore slightly lower (calculated at 1.26 g/cm 3 with the old mass estimate discussed below). [6]