Asteroid 2007CA19

lol

NASA, National Aeronautics and Space Administration was jokingly referred to as "Need Another Seven Astronauts", after the 1986 Challenger explosion, in which seven astronauts were killed.[44]

Energy:
Energy before atmospheric entry: 6.61 x 1020 Joules = 1.58 x 105 MegaTons TNT
The average interval between impacts of this size somewhere on Earth during the last 4 billion years is 1.1 x 106years

Atmospheric Entry:
The projectile begins to breakup at an altitude of 62800 meters = 206000 ft
The projectile reaches the ground in a broken condition. The mass of projectile strikes the surface at velocity 29.3 km/s = 18.2 miles/s
The impact energy is 6.52 x 1020 Joules = 1.56 x 105MegaTons.
The broken projectile fragments strike the ground in an ellipse of dimension 1.62 km by 1.14 km

Major Global Changes:
The Earth is not strongly disturbed by the impact and loses negligible mass.
The impact does not make a noticeable change in the Earth's rotation period or the tilt of its axis.
The impact does not shift the Earth's orbit noticeably.

you didn't mention crater diameter(about 15km) and effects
as far as 500km will be 7.9 Richter scale earthquake.

Your Inputs:
Distance from Impact: 100.00 km = 62.10 miles
Projectile Diameter: 864.00 m = 2833.92 ft = 0.54 miles
Projectile Density: 2600 kg/m3
Impact Velocity: 29.00 km/s = 18.01 miles/s
Impact Angle: 45 degrees
Target Density: 2500 kg/m3
Target Type: Sedimentary Rock

Energy:
Energy before atmospheric entry: 3.69 x 1020 Joules = 8.82 x 104 MegaTons TNT
The average interval between impacts of this size somewhere on Earth during the last 4 billion years is 7.1 x 105years

Atmospheric Entry:
The projectile begins to breakup at an altitude of 66900 meters = 220000 ft
The projectile reaches the ground in a broken condition. The mass of projectile strikes the surface at velocity 28.7 km/s = 17.8 miles/s
The impact energy is 3.62 x 1020 Joules = 8.65 x 104MegaTons.
The broken projectile fragments strike the ground in an ellipse of dimension 1.5 km by 1.06 km

Major Global Changes:
The Earth is not strongly disturbed by the impact and loses negligible mass.
The impact does not make a noticeable change in the Earth's rotation period or the tilt of its axis.
The impact does not shift the Earth's orbit noticeably.

Crater Dimensions:
What does this mean?


Crater shape is normal in spite of atmospheric crushing; fragments are not significantly dispersed.

Transient Crater Diameter: 11.3 km = 7.04 miles
Transient Crater Depth: 4.01 km = 2.49 miles

Final Crater Diameter: 15.6 km = 9.71 miles
Final Crater Depth: 0.677 km = 0.42 miles

The crater formed is a complex crater.
The volume of the target melted or vaporized is 2.28 km3 = 0.547 miles3
Roughly half the melt remains in the crater , where its average thickness is 22.6 meters = 74.1 feet

Thermal Radiation:
What does this mean?


Time for maximum radiation: 0.496 seconds after impact

Visible fireball radius: 13.5 km = 8.37 miles
The fireball appears 30.6 times larger than the sun
Thermal Exposure: 1.61 x 107 Joules/m2
Duration of Irradiation: 185 seconds
Radiant flux (relative to the sun): 86.8

Effects of Thermal Radiation:


Clothing ignites

Much of the body suffers third degree burns

Newspaper ignites

Plywood flames

Deciduous trees ignite

Grass ignites


Seismic Effects:
What does this mean?


The major seismic shaking will arrive at approximately 20 seconds.
Richter Scale Magnitude: 7.9
Mercalli Scale Intensity at a distance of 100 km:

VII. Damage negligible in buildings of good design and construction; slight to moderate in well-built ordinary structures; considerable damage in poorly built or badly designed structures; some chimneys broken.

VIII. Damage slight in specially designed structures; considerable damage in ordinary substantial buildings with partial collapse. Damage great in poorly built structures. Fall of chimneys, factory stacks, columns, monuments, walls. Heavy furniture overturned.


Ejecta:
What does this mean?


The ejecta will arrive approximately 144 seconds after the impact.
Average Ejecta Thickness: 14.8 cm = 5.81 inches
Mean Fragment Diameter: 10 cm = 3.94 inches


Air Blast:
What does this mean?


The air blast will arrive at approximately 303 seconds.
Peak Overpressure: 124000 Pa = 1.24 bars = 17.6 psi
Max wind velocity: 203 m/s = 455 mph
Sound Intensity: 102 dB (May cause ear pain)
Damage Description:


Multistory wall-bearing buildings will collapse.

Wood frame buildings will almost completely collapse.

Highway truss bridges will collapse.

Glass windows will shatter.

Up to 90 percent of trees blown down; remainder stripped of branches and leaves.

My mistake entered 864 instead of 990(Wikipedia diameter)
[link to www.lpl.arizona.edu]

Your Inputs:
Distance from Impact: 100.00 km = 62.10 miles
Projectile Diameter: 990.00 m = 3247.20 ft = 0.61 miles
Projectile Density: 2600 kg/m3
Impact Velocity: 29.00 km/s = 18.01 miles/s
Impact Angle: 45 degrees
Target Density: 2500 kg/m3
Target Type: Sedimentary Rock

Energy:
Energy before atmospheric entry: 5.55 x 1020 Joules = 1.33 x 105 MegaTons TNT
The average interval between impacts of this size somewhere on Earth during the last 4 billion years is 9.7 x 105years

Atmospheric Entry:
The projectile begins to breakup at an altitude of 66900 meters = 220000 ft
The projectile reaches the ground in a broken condition. The mass of projectile strikes the surface at velocity 28.8 km/s = 17.9 miles/s
The impact energy is 5.47 x 1020 Joules = 1.31 x 105MegaTons.
The broken projectile fragments strike the ground in an ellipse of dimension 1.65 km by 1.17 km

Major Global Changes:
The Earth is not strongly disturbed by the impact and loses negligible mass.
The impact does not make a noticeable change in the Earth's rotation period or the tilt of its axis.
The impact does not shift the Earth's orbit noticeably.

Crater Dimensions:
What does this mean?


Crater shape is normal in spite of atmospheric crushing; fragments are not significantly dispersed.

Transient Crater Diameter: 12.6 km = 7.83 miles
Transient Crater Depth: 4.46 km = 2.77 miles

Final Crater Diameter: 17.6 km = 11 miles
Final Crater Depth: 0.702 km = 0.436 miles

The crater formed is a complex crater.
The volume of the target melted or vaporized is 3.44 km3 = 0.826 miles3
Roughly half the melt remains in the crater , where its average thickness is 27.5 meters = 90.3 feet

Thermal Radiation:
What does this mean?


Time for maximum radiation: 0.568 seconds after impact

Visible fireball radius: 15.6 km = 9.67 miles
The fireball appears 35.4 times larger than the sun
Thermal Exposure: 2.45 x 107 Joules/m2
Duration of Irradiation: 213 seconds
Radiant flux (relative to the sun): 115

Effects of Thermal Radiation:


Clothing ignites

Much of the body suffers third degree burns

Newspaper ignites

Plywood flames

Deciduous trees ignite

Grass ignites


Seismic Effects:
What does this mean?


The major seismic shaking will arrive at approximately 20 seconds.
Richter Scale Magnitude: 8.0
Mercalli Scale Intensity at a distance of 100 km:

VII. Damage negligible in buildings of good design and construction; slight to moderate in well-built ordinary structures; considerable damage in poorly built or badly designed structures; some chimneys broken.

VIII. Damage slight in specially designed structures; considerable damage in ordinary substantial buildings with partial collapse. Damage great in poorly built structures. Fall of chimneys, factory stacks, columns, monuments, walls. Heavy furniture overturned.


Ejecta:
What does this mean?


The ejecta will arrive approximately 144 seconds after the impact.
Average Ejecta Thickness: 22.6 cm = 8.91 inches
Mean Fragment Diameter: 11.3 cm = 4.46 inches


Air Blast:
What does this mean?


The air blast will arrive at approximately 303 seconds.
Peak Overpressure: 164000 Pa = 1.64 bars = 23.3 psi
Max wind velocity: 250 m/s = 558 mph
Sound Intensity: 104 dB (May cause ear pain)
Damage Description:


Multistory wall-bearing buildings will collapse.

Wood frame buildings will almost completely collapse.

Highway truss bridges will collapse.

Glass windows will shatter.

Up to 90 percent of trees blown down; remainder stripped of branches and leaves.

For Earth of course it dont will anythying can make change.
But if it strike town like New York or other big town, and perhaps strike in to the sea or ocean it can make armagedon for this part of earth.

Seems pretty far away even at its closest i wouldnt worry about it...unless it changes course for some reason and then everyone can worry bout it..

The air blast will arrive at approximately 303 seconds.
Peak Overpressure: 164000 Pa = 1.64 bars = 23.3 psi
Max wind velocity: 250 m/s = 558 mph
Sound Intensity: 104 dB (May cause ear pain)
Damage Description:


Oh! Anyone can stand up in 558 mph winds!! You better be at least 300 miles from this pebble to stand up in the wind!!

never mind the 558 mph winds. it MAY cause ear pain! I hate earache. It really spoils my day!

Earache my eye! Now get your little fanny perpendicular and get ready for school!

NANANA-NANANA-NA-NA-NA

Never A Straight Answer

Good news: Its new impact probability is now 1/300 milion
and it been removed from risk page.(the link no longer works)