Geometric albedo node of their orbit, and hence lie on the ecliptic. In practice, measurements at small nonzero phase angles are used to derive the parameters which characterize the directional reflectance properties for the body (Hapke parameters). 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 them a geometric albedo above unity (1.4 in the
Albedo One writing of genre author Gene Wolfe. These columns are often noted for their "opinionated" or controversial stance on genre matters, with that in issue 31 of "Albedo One" being described as "a deliberately provocative rant" by one reviewer. In 1996 the editors offered an open invitation, stating that "If you feel strongly about anything and want to let us and the readers know, you too can don the mightly mantle of Severian." Between 1997 and 1999 "Albedo One" was honored three times by the European Science Fiction Society, winning Awards for "Best Magazine" and "Best Publisher". Stories from the magazine