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rock > igneous rock > differentiated meteorite > differentiated achondrite > asteroidal achondrite > angrite > Angra dos Reis

Angra dos Reis
subject			fact

Angra dos Reis	has image
	is an instance of angrite
	is an instance of meteorite fall
	has name Angra dos Reis
	has fall date 5:00 am January 20, 1869
	has fall coordinates 22° 58' S., 44° 19' W.
	has fall location Rio de Janeiro, Brazil
	has mass 1.5 kg
angrite	has letter designation ACANOM
	has characteristic mineral augite
	has minerology Al-Ti-diopside, anorthite, calcic olivine
	has petrology fine- to coarse-grained igneous
	has likely origin crystallized melts, cumulates (?)
	has prototype Angra dos Reis meteorite
meteorite fall	has value higher because the fall was witnessed
	has fall description what witnesses saw or what was recorded by instruments
	has weathering negligible due to quick recovery of meteorite before corrosion begins
asteroidal achondrite	has origin asteroid
meteorite	has fall map which appears as an elongated footprint which depends on impact angle, airbursts, and impact velocity
	can have crater image
	has original mass which can over an order of magnitude greater than total mass of fragment(s) collected at the impact site
	has composition often minerals not found on Earth
	has relative abundance
	has total mass of finds 485755 kg
	has number of finds 1691
	has impact velocity when it hits the ground which is smaller than its velocity before it enters the atmosphere
	has impact angle
	has weather resistance which depends on its composition
	has monetary value large if the fall was witnessed
	often produce power outages and failures in electrical equipment due to EMP (electromagnetic pulse)
	can be associated with crater
	has origin meteoroid from interplanetary space or fragment dislodged from another planet, moon or planetesimal
	vaporizes completely if size is between 3 micrometers and 3 millimeters
	can survive fall if size is larger than 3 mm and velocity is less than 24 km per second
	can survive fall if it fragments because smaller pieces with less mass are more easily slowed by the atmosphere
	has ablative mass loss depending on composition, more friable stony meteoroids loses more mass than iron meteoroid
	has ablative mass loss directly proportional to initial velocity
	can shatter during impact phase
	can fragment during meteor phase
	has fragmentation probability during meteor phase which depends on composition
rock	has part mineral
	has texture
	has genesis
achondrite	has distinguishing feature no chondrules
igneous rock	has solidification mechanism
	has solidification timescale

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