title: Io: ground-based observations of hot spots.
abstract: Observations of Io in eclipse demonstrate conclusively that Io emits substantial amounts of radiation at 4.8 and 3.8 micrometers and a measurable amount at 2.2 micrometers. Color temperatures derived from the observations fit blackbody emission at 560 K. The required source area to yield the observed 4.8-micrometer flux is approximately 5 x 10(-5) of the disk of Io and is most likely comprised of small hot spots in the vicinity of the volcanoes.
authors.forename: W M
authors.initials: WM
authors.lastname: Sinton
authors.forename: A T
authors.initials: AT
authors.lastname: Tokunaga
authors.forename: E E
authors.initials: EE
authors.lastname: Becklin
authors.forename: I
authors.initials: I
authors.lastname: Gatley
authors.forename: T J
authors.initials: TJ
authors.lastname: Lee
authors.forename: C J
authors.initials: CJ
authors.lastname: Lonsdale