Submission + - Two ESA craft to observe 21 Lutetia (esa.int)
japan_dan writes: It looks like two ESA spacecraft will observe 21 Lutetia during Rosetta's flyby on 10 July: Rosetta from 3160 km and Herschel from 450 mn km. Herschel's PACS and SPIRE spectrometers will view Lutetia in far IR, while Rosetta will gather data in a variety of wavelengths. Since the observations will be coordinated during and at closest approach, scientists will later be able to correlate the data to produce a map of the thermal radiation emitted by Lutetia. There are a pair of animations modelling the expected temperature distribution over Lutetia in the Rosetta Blog: http://www.esa.int/blog. The joint observations are part of a series of 8 sessions planned in the next couple of years by Herschel scientists of objects that will be visited by spacecraft.
