Albedo (absolute magnitude and diameter)

Not Reviewed
Equation / Last modified by EmilyB on 2016/08/01 15:58
Albedo (absolute magnitude and diameter)
Variable Instructions Datatype
`(H)"absolute magnitude"` Enter absolute magnitude Decimal
`(D)"diameter"` Enter diameter Decimal (km)
EmilyB.Albedo (absolute magnitude and diameter)

The Albedo (absolute magnitude and diameter or reflection coefficient is the diffuse reflectivity or reflecting power of a surface. It is the ratio of reflecting radiation from the surface  to incident radiation upon it. Its dimensionless nature lets it be expressed as a percentage and is measured on a scale from zero for no reflection of a perfectly black surface to 1 for perfect reflection of a white surface. The following formula is used to calculate albedo: `A=((1329*10^(-H/5))/D)^2` where:

  • `A` = astronomical albedo
  • `H` = absolute magnitude
  • `D` = diameter in kilometers


Wikipedia (