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gptkbp:instance_of
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gptkb:Asteroids
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gptkbp:archaeological_findings
|
observed since 2004
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|
gptkbp:average_temperature
|
about 300 K
|
|
gptkbp:closed
|
April 13, 2029
March 2021
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gptkbp:closing_date
|
April 13, 2029
|
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gptkbp:diameter
|
approximately 370 meters
|
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gptkbp:discovered_by
|
Linear
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gptkbp:discovery
|
gptkb:NASA's_NEAT_program
gptkb:Mount_Lemmon_Observatory
asteroid survey
|
|
gptkbp:discovery_year
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gptkb:2004
June 19, 2004
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gptkbp:eccentricity
|
0.191
|
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gptkbp:element
|
semi-major axis 1.0 AU
|
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gptkbp:exploration_plans
|
none currently planned
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gptkbp:first_published
|
October 2023
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gptkbp:future_close_approaches
|
multiple in the 21st century
|
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gptkbp:has_color
|
0.5
|
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gptkbp:has_radius
|
185 meters
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gptkbp:has_spectral_type
|
gptkb:S-type_asteroid
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
asteroid 99942 Apophis
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gptkbp:impact_probability
|
1 in 110,000 for 2029
|
|
gptkbp:is_aplace_for
|
1.1 AU
|
|
gptkbp:light_requirement
|
0.19
|
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gptkbp:mass
|
approximately 27 million kg
|
|
gptkbp:name
|
gptkb:Apophis
|
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gptkbp:next_close_approach_distance
|
approximately 31,000 kilometers
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|
gptkbp:next_event
|
planned for 2029
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gptkbp:orbital_inclination
|
3.3 degrees
|
|
gptkbp:orbital_period
|
none known
well-studied
0.9 years
|
|
gptkbp:orbital_simulation
|
used for predicting future paths.
|
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gptkbp:origin
|
Egyptian god of chaos
|
|
gptkbp:perihelion
|
0.9 AU
|
|
gptkbp:potential_impact_years
|
2029, 2036, 2068
|
|
gptkbp:potentially_hazardous_asteroid
|
gptkb:true
|
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gptkbp:public_interest
|
high due to potential impact risk
|
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gptkbp:research
|
difficult to track due to brightness changes
extensive tracking data available
ongoing studies on its composition
|
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gptkbp:research_interest
|
high due to close approaches
|
|
gptkbp:rotation_period
|
about 30 hours
tilted at 30 degrees
|
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gptkbp:scientific_classification
|
gptkb:Near-Earth_Object_(NEO)
|
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gptkbp:bfsParent
|
gptkb:Apollo_group_of_asteroids
|
|
gptkbp:bfsLayer
|
7
|