2020 Close Approaches

Small pieces of rock, with a big influence (just ask the dinosaurs).
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Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

2020 Close Approaches

Post by Christopher K. »

2020 GH2
Wednesday 15 April 2020, 7:46am CDT ±0:03
Classification: Apollo
Diameter: 13 to 60 meters
Probable Distance: 357,638 kilometers (0.93 LD)


Sixty-three observations (Saturday to Monday) were used for this prediction. I could find no impact risk for 2020 GH2.

2020 GH2's Orbit Diagram: https://ssd.jpl.nasa.gov/sbdb.cgi?sstr= ... ;cad=0#orb

The Three Classifications of Asteroids:
https://cneos.jpl.nasa.gov/about/neo_groups.html

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2020 Close Approaches

Post by Christopher K. »

2020 HJ6
Wednesday 29 April 2020, 1:00am CDT
Classification: Apollo
Diameter: 12 to 28 meters
Probable Distance: 643,872 kilometers (1.67 LD)


Thirty-four observations (last Monday to yesterday) were used for this prediction. I could find no impact risk for 2020 HJ6.

2020 HJ6's Orbit Diagram: https://ssd.jpl.nasa.gov/sbdb.cgi?sstr= ... ;cad=0#orb

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2020 Close Approaches

Post by Christopher K. »

2011 ES4
Thursday 1 September 2020, 10:12am CDT ±eight days
Classification: Apollo
Diameter: 22 to 49 meters
Probable Distance: 122,880 kilometers (0.32 LD)


Forty-four observations (2 March 2011 to 6 March 2011) were used for this prediction; the ages of the observations may explain the wild margin of error. I could find no impact risk for 2011 ES4.

2011 ES4's Orbit Diagram: https://ssd.jpl.nasa.gov/sbdb.cgi?sstr= ... ;cad=1#cad

Christopher K.
Posts: 5482
Joined: October 12th, 2009, 3:28 pm
Location: Baton Rouge, LA

Re: 2020 Close Approaches

Post by Christopher K. »

What an interesting day. Tropical Storm Sally is diverting her landfall toward Mississippi, this is the first Monday in Phase 3...and two Atens came very close to Earth.

2020 RF3
Monday 14 September 2020, 1:49am CDT ± one minute
Classification: Aten
Diameter: 5 to 11 meters
Probable Distance: 87,841 kilometers (0.24 LD)

Forty observations (Saturday to today) were used for this prediction. I could find no impact risk for 2020 RF3.
2020 RF3's Orbit Diagram: https://ssd.jpl.nasa.gov/sbdb.cgi?sstr= ... ;cad=0#orb

2020 RD4
Monday 14 September 2020, 3:33pm CDT ± one minute
Classification: Aten
Diameter: 3 to 7 meters
Probable Distance: 102,477 kilometers (0.28 LD)

Twenty-seven observations (Saturday to today) were used for this prediction. I could find no impact risk for 2020 RD4.
2020 RD4's Orbit Diagram: https://ssd.jpl.nasa.gov/sbdb.cgi?sstr= ... ;cad=0#orb

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