Albedo used in astronomy are the (V-band) geometric albedo (measuring brightness when illumination comes from directly behind the observer) and the Bond albedo (measuring total proportion of electromagnetic energy reflected). Their values can differ significantly, which is a common source of confusion. In detailed studies, the directional reflectance properties of astronomical bodies are often expressed in terms of the five Hapke parameters which semi-empirically describe the variation of albedo with phase angle, including a characterization of the opposition effect of regolith surfaces. The correlation between astronomical (geometric) albedo, absolute magnitude and diameter is: formula_7, where formula_8 is the astronomical albedo, formula_9
Albedo One 'trans'. Notable authors include Aliette de Boddard, Jay Caselberg and Lawrence M. Schoen. Issues appear two or three times a year both as a PDF download and as an A4 size print magazine. Sample content from certain issues is also available to view on the "Albedo One" website and is periodically updated. Albedo One Albedo One is an Irish horror, fantasy and science fiction magazine founded in 1993 and currently published by Albedo One Productions. "Albedo One" is widely regarded as the successor to the defunct Irish science fiction magazine "FTL", which was originally published by the (also now-defunct) Irish