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GEOL3045: Planetary Geology. Lysa Chizmadia Asteroid Belt. Mars Landslides:. Image from: http://gizmodo.com/363517/reconnaissance-orbiter-captures-live-north-pole-avalanche-on-mars. Summary: Planetarium. Ecliptic. Milky Way. - PowerPoint PPT Presentation
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GEOL3045: Planetary GeologyGEOL3045: Planetary Geology
Lysa ChizmadiaAsteroid Belt
Lysa ChizmadiaAsteroid Belt
Mars Landslides:Mars Landslides:
Image from: http://gizmodo.com/363517/reconnaissance-orbiter-captures-live-north-pole-avalanche-on-mars
Summary: PlanetariumSummary: Planetarium
Image from: http://images.google.com/imgres?imgurl=http://documents.wolfram.com/applications/astronomer/Notebooks/NBMLImages/GraphicsGallery/GraphicsGallery_27.gif&imgrefurl=http://documents.wolfram.com/applications/astronomer/Notebooks/GraphicsGallery.html&h=251&w=459&sz=6&hl=en&start=41&um=1&tbnid=LSeB11GRCpj2-M:&tbnh=70&tbnw=128&prev=/images%3Fq%3DNight%2Bsky%2Becliptic%2Bmilky%2Bway%26start%3D40%26ndsp%3D20%26um%3D1%26hl%3Den%26client%3Dsafari%26rls%3Den%26sa%3DN
Ecliptic
Milky Way
IntroductionIntroductionMain Belt 2-4 AUTotal mass < MoonFour largest, >50% of mass
1 Ceres: ~950 km diameter (33%)C-type
4 Vesta: 460-580 km diameter (9%)V-type
2 Pallas: 500-570 km diameter (7%) C-typeInclination = 34.8° (~ Pluto)
10 Hygiea: 350-500 km diameter (3%) C-type
Main Belt 2-4 AUTotal mass < MoonFour largest, >50% of mass
1 Ceres: ~950 km diameter (33%)C-type
4 Vesta: 460-580 km diameter (9%)V-type
2 Pallas: 500-570 km diameter (7%) C-typeInclination = 34.8° (~ Pluto)
10 Hygiea: 350-500 km diameter (3%) C-type
Image from: http://en.wikipedia.org/wiki/Asteroid_belt
DetectionDetection
www.sas.org/.../Feature_ 1_Fig_4_May_2007.jpg
Spectral ClassesSpectral ClassesC-type:
75% of asteroidsExtremely dark
(albedo 0.03)~ Carbonaceous
chondritesS-type:
17% of asteroidsModerately
bright (albedo 0.10-0.22)
Silicates + FeNi metal
C-type:75% of asteroidsExtremely dark
(albedo 0.03)~ Carbonaceous
chondritesS-type:
17% of asteroidsModerately
bright (albedo 0.10-0.22)
Silicates + FeNi metal
M-type:8% of asteroidsVery bright
(albedo 0.10-0.18)
FeNi metalV-type:
~ 4VestaModerately
bright (albedo 0.10-0.22)
~ S-type w/ more pxHED meteorites
M-type:8% of asteroidsVery bright
(albedo 0.10-0.18)
FeNi metalV-type:
~ 4VestaModerately
bright (albedo 0.10-0.22)
~ S-type w/ more pxHED meteorites
SpectroscopySpectroscopy
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Images from: http://www.noao.edu/education/asteroids/files/Asteroid-Spectra.pdf
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SpectroscopySpectroscopy
Images from: http://www.noao.edu/education/asteroids/files/Asteroid-Spectra.pdf
Distribution of ClassesDistribution of Classes
Image from: www.britannica.com/ eb/art/print?id=3485
Orbital DynamicsOrbital Dynamics
Images from: http://en.wikipedia.org/wiki/Asteroid_belt
Kirkwood GapsEccentricity
Inclination
Image from: http://en.wikipedia.org/wiki/Asteroid_belt
CollisionsCollisions
Images from: http://www.psi.edu/hartmann/pic-cat/asteroids.html
Zodiacal Light
60-1000 tons of material per day intersect with Earth’s atmosphere
Most is < grain of sand
Velocities: 11-14 km/s
Impact ProbabilityImpact Probability
Images from: http://www.ruf.rice.edu/~leeman/geol108_impacts.html
SummarySummary
Most in main belt 2-4 AUTotal mass < Moon
4 largest asteroids >50% mass4 main spectral types of
AsteroidsC-type: carbonaceous chondritesS-type: ordinary chondritesM-type: metallic meteoritesV-type: HED meteorites
Most in main belt 2-4 AUTotal mass < Moon
4 largest asteroids >50% mass4 main spectral types of
AsteroidsC-type: carbonaceous chondritesS-type: ordinary chondritesM-type: metallic meteoritesV-type: HED meteorites
