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Experts on Comets

comet is an icy small Solar System body that, when passing close to theSun, heats up and begins to outgas, displaying a visible atmosphere or coma, and sometimes also a tail. These phenomena are due to the effects of solar radiation and the solar wind upon the nucleus of the comet. Comet nuclei range from a few hundred metres to tens of kilometres across and are composed of loose collections of ice, dust, and small rocky particles. The coma and tail are much larger and, if sufficiently bright, may be seen from the Earth without the aid of a telescope. Comets have been observed and recorded since ancient times by many cultures.

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Name Missions & Mission Experience Targets Techniques Major Facilities & Instrument Development
rclark's picture
Roger Clark
Cassini, Chandrayaan 1 (India), Europa Clipper, Galileo, Mars Global Surveyor, Mars Observer, MRO ** Instrument Co-Investigator, Mission Co-Investigator Asteroids, Ceres, Comets, Dwarf planets, Earth, Exoplanets, Icy satellites, Interplanetary Dust, Io, Jupiter, Kuiper Belt, Mars, Mercury, Moon, Neptune, Planetary rings, Pluto, Saturn, Small satellites, Titan, Uranus, Venus, Vesta Space-based observing, Spectroscopy, Remote sensing, Photometry, Numerical modeling, Geology, Ground-based observing, Mineralogy, Mapping
rgaskell's picture
Robert Gaskell
Cassini, Dawn, MESSENGER, OSIRIS-REx, Rosetta, Voyager Asteroids, Comets, Earth, Icy satellites, Io, Mars, Mercury, Moon, Small satellites, Vesta Shape modeling
graps's picture
Amara Graps
Cassini, Dawn, Galileo, IRAS, New Horizons, Rosetta, Ulysses, Voyager ** Calibration/Test planning, Data archive, Data validation, Instrument operations, Mission science team, Requirements generation and flow down, Science operations Asteroids, Ceres, Comets, Dwarf planets, Enceladus, Icy satellites, Interplanetary Dust, Io, Io torus, Jupiter, Meteorites, Moon, Planetary rings, Saturn, Small satellites, Solar particles/Solar wind, Uranus, Vesta Astrobiology, Education/Public Outreach, Ground-based observing, Magnetospherics, Numerical modeling, Photometry, Remote sensing, Shape modeling, Space-based observing, Volcanism IRTF, Palomar ** Cameras, Dust counter
tgrav's picture
Tommy Grav
NEOWISE Asteroids, Comets, Icy satellites, Jupiter, Kuiper Belt, Neptune, Saturn, Small satellites, Uranus Ground-based observing, Numerical modeling, Photometry, Space-based observing
hartmann's picture
Bill Hartmann
Mariner 9 Asteroids, Comets, Earth, Mars, Meteorites, Moon, Small satellites Crater Counting, Education/Public Outreach, Ground-based observing, Volcanism
hhsieh's picture
Henry Hsieh
Asteroids, Comets, Interplanetary Dust, Small satellites Astrobiology, Education/Public Outreach, Ground-based observing, Numerical modeling, Photometry, Space-based observing, Spectroscopy
kortenka's picture
Steve Kortenkamp
Asteroids, Comets, Interplanetary Dust, Meteorites, Small satellites Celestial Mechanics, Education/Public Outreach, Numerical modeling
jyli's picture
Jian-Yang Li
Chang'E 2 (China), Dawn, Deep Impact, EPOXI, HST, OSIRIS-REx, Stardust-NExT ** Calibration/Test planning, Data archive, Data validation, Mission science team, Science operations Asteroids, Ceres, Comets, Dwarf planets, Interplanetary Dust, Small satellites, Vesta Ground-based observing, Mapping, Photometry, Remote sensing, Space-based observing, Thermal modeling ALMA, Gemini, Palomar
elilly's picture
Eva Lilly
Asteroids, Comets, Kuiper Belt Astrometry, Education/Public Outreach, Photometry Gemini, Keck Observatory, Pan-STARRS
jmcelwaine's picture
Jim McElwaine
Asteroids, Ceres, Comets, Earth, Icy satellites, Mars, Moon, Planetary rings, Pluto, Small satellites, Titan, Vesta Shape modeling, Radar, Numerical modeling, Geomorphology
jmolaro's picture
Jamie Molaro
OSIRIS-REx Asteroids, Ceres, Comets, Enceladus, Europa, Icy satellites, Moon Education/Public Outreach, Field Work, Geomorphology, Numerical modeling, Thermal modeling
jpmorgen's picture
Jeff Morgenthaler
GALEX, Sounding Rockets Comets, Earth, Europa, Gas giants, Io, Io torus, Jupiter, Solar particles/Solar wind Aeronomy, Astrometry, Atmospheres, Calorimetry, Ground-based observing, Photometry, Space-based observing, Spectroscopy, X-ray spectroscopy Kitt Peak ** Imaging spectrometers, Spectrometers, X-ray spectrometers
mueller's picture
Beatrice Mueller
Asteroids, Comets, Trans-Neptunian objects Education/Public Outreach, Ground-based observing, Photometry Cerro Tololo
rnelson's picture
Robert Nelson
Cassini, Voyager Asteroids, Comets, Dwarf planets, Exoplanets, Icy satellites, Io, Mercury, Moon, Small satellites, Titan Spectroscopy, Remote sensing, Photometry
obrien's picture
David O'Brien
Dawn Asteroids, Ceres, Comets, Dwarf planets, Exoplanets, Icy satellites, Small satellites, Vesta Astrobiology, Numerical modeling, Remote sensing
prettyman's picture
Thomas Prettyman
Dawn, Lunar Prospector, Mars Odyssey ** Calibration/Test planning, Data archive, Data validation, Electronics design, Flight Software, Instrument operations, Instrument PI, Mission Co-Investigator, Mission science team, Requirements generation and flow down Asteroids, Ceres, Comets, Dwarf planets, Earth, Mars, Mercury, Meteorites, Moon, Small satellites, Venus, Vesta Education/Public Outreach, Geology, Mapping, Neutron detectors, Numerical modeling, Remote sensing, Shape modeling, Space-based observing
jerichardsonjr's picture
James Richardson Jr.
Deep Impact, EPOXI ** Mission science team Asteroids, Comets, Icy satellites, Moon Geomorphology, Impacts, Numerical modeling, Radar Arecibo
nalin's picture
Nalin Samarasinha
Asteroids, Comets, Kuiper Belt Education/Public Outreach, Ground-based observing, Numerical modeling, Remote sensing Cerro Tololo, Kitt Peak
ssonnett's picture
Sarah Sonnett
NEOWISE Asteroids, Comets, Dwarf planets, Trans-Neptunian objects Astrobiology, Astrometry, Education/Public Outreach, Ground-based observing, Numerical modeling, Photometry, Shape modeling, Space-based observing, Spectroscopy, Thermal Emission Spectroscopy Kitt Peak ** Cameras
jsteckloff's picture
Jordan Steckloff
EPOXI, Stardust-NExT Asteroids, Charon, Comets, Dwarf planets, Icy satellites, Kuiper Belt, Pluto, Small satellites, Titan, Trans-Neptunian objects Celestial Mechanics, Education/Public Outreach, Numerical modeling, Thermal modeling
sykes's picture
Mark Sykes
Dawn, IRAS, Spitzer ** Data archive, Mission Co-Investigator, Mission science team Asteroids, Ceres, Charon, Comets, Dwarf planets, Interplanetary Dust, Pluto, Small satellites, Vesta Ground-based observing, Photometry, Radiometry, Remote sensing, Space-based observing IRTF
tricaric's picture
Pasquale Tricarico
Dawn ** Spacecraft navigation Asteroids, Ceres, Comets, Vesta Astrometry, Celestial Mechanics, Gravity, Numerical modeling, Planetary Interiors, Shape modeling, Thermal modeling
sjw's picture
Stu Weidenschilling
Asteroids, Comets, Exoplanets, Meteorites, Small satellites, Trans-Neptunian objects Numerical modeling
jweirich's picture
John Weirich
OSIRIS-REx Asteroids, Comets, Earth, Moon, Small satellites Shape modeling, Geology, Mineralogy
pweissman's picture
Paul Weissman
Galileo, Rosetta Asteroids, Comets, Kuiper Belt, Small satellites Education/Public Outreach, Ground-based observing, Numerical modeling, Photometry, Remote sensing, Space-based observing
zouxd's picture
Xiao-Duan Zou
Chang'E 1 (China), Chang'E 2 (China), Chang'E 3 (China) Asteroids, Comets, Moon Shape modeling, Remote sensing, Photometry, Geology, Mapping

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