A dataset provided by the European Space Agency

Name GT1_lorourke_9
Title Herschel In-situ Asteroid & Comet Observation programme
URL

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DOI 10.5270/esa-kwojq8h
Author o.rourke, l.
Description In September 2010, 25 years will have passed since the first in-situ encounter of a space probe with a comet. This first visit occurred in September 1985 when the International Cometary Explorer (ICE), passed through the tail of P-Giacobini-Zinner. Up to that point, comet and asteroid scientific observations were always based upon remote sensing be they performed from ground or from space. The next opportunity for a comet encounter arose with the return of Halley.s Comet in 1986, whereby many satellites (Giotto, Vega 1 & 2, Suisei & Sakigake) were launched to perform in-situ observations. The first asteroid flybys, Gaspra & Ida-Dactyl, occurred as part of Galileo.s journey to Jupiter. Since this time, NEAR, DS1, Hayabusa, Rosetta, Deep Impact, Stardust-NExT and Dawn satellites have all been launched with the aim of performing flybys, orbiting & sample return. Remote sensing & in-situ measurements are considered highly complementary in nature: remote sensing shows the global picture, but conversion of measured fluxes in physical quantities frequently depends on poorly constrained model parameters (e.g. dust size distribution or fluorescence efficiencies). In-situ techniques measure physical quantities in a more direct way, but are limited in spatial coverage. The benefit of both combined is that we can compare surface composition, reflectance, albedos & temperatures of in-situ and remote sensing and as a result greatly improve the scientific understanding of the objects in question. This proposal focuses on using the Herschel Space Observatory to remotely observe a select set of in-situ comets-asteroids. The down-selection from 29 asteroids & comets to the final eight was made based upon many criteria, the main one being prioritisation of the most important open scientific issues existing for each of the targets for which the Herschel Space Observatory, its sensitivity & wavelength coverage, could indeed contribute...
Publication
Instrument SPIRE_SpireSpectrometer_, HIFI_HifiPoint_dbs, PACS_PacsRangeSpec_point, SPIRE_SpirePhoto_small, PACS_PacsPhoto_largeScan
Temporal Coverage 2010-06-04T15:45:26Z/2013-01-06T02:05:47Z
Version SPG v14.2.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2013-07-06T01:32:49Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2013-07-06T01:32:49Z, GT1_lorourke_9, SPG v14.2.0. https://doi.org/10.5270/esa-kwojq8h