29 September 2015

The Latest Worldwide Meteor/Meteorite News 29SEP2015

ISS Lunar Transit 24SEP2015 Fortaleza, Ceará - Brasil w/ Video
Latest Worldwide Meteor/Meteorite News - Blogger
The Latest Worldwide Meteor/Meteorite News 25SEP2015. 'Doomsday meteor' to brush past Earth TODAY, NASA's Asteroid Watch warn Daily Star ...

High River Will Undertake Disaster Recovery Training With Mock Meteorite Strike
Huffington Post
After surviving one of the worst floods in Canadian history a couple of years ago, the Alberta town of 12,000, 70 kilometres south of Calgary is ...

When is the next Blood Moon? What else can I see in the skies this year?
Coventry Telegraph
The Orionids Meteor Shower tends to be active in the month of October, usually peaking around October 20. People can sometimes see about 20 ...

Facebook Outages Caused By Satellite Interference from Large MeteorSet To Hit The Earth Within 7
Daily Media Buzz
UGNazi stated that there is a HUGE Meteor that is heading towards earth at 72 km/sec thats 160,000 mph!! They said that NASA was keeping this from ... Total NONSENSE!

A practical method for the analysis of meteor spectra [IMA]
arXiver - WordPress.com
The analysis of meteor spectra (photographic, CCD or video recording) is complicated by the fact that spectra obtained with objective gratings are ...

http://arxiv.org/abs/1509.07531
[1509.07531] A practical method for the analysis of meteor spectra
arxiv.org
Life After The Supermoon Lunar Eclipse
Youth Independent News
Meteor showers might not be as rare, but it can still make your night a little more special. And without the same media coverage, you likely won't wake ...

Meteor Month: 2015 Orionid and Draconid MeteorShowers to Peak in October
Patch.com
Starting as early as October 4, the Orionid Meteor Shower — formed by debris from Halley's Comet — will begin lighting up the sky. The Orionids ...

Supermoon Among Celestial Events to Fill the Night Sky in 2015
NBC New York
Revelers got a chance to see the Perseid meteor shower on Aug. 12, 2015. It's said to be one of the best annual displays of its kind, with as many as ...

Why was it so hard to take pictures of the Super Blood Moon?
Telegraph.co.uk
November 18: Leonid meteor shower: Some shooting stars are expected to be visible from November 15-20. Maximum rate of visible meteors from a ...

The Blood Moon has passed - what else can you see in the skies this autumn?
ChronicleLive
This meteor shower tends to be active in the month of October, usually peaking around October 20. People can sometimes see about 20 meteors an ...

Sequência de fotos mostra Óvni ao lado de Superlua no DF
g1.globo.comObjeto luminoso teria subido na diagonal e depois tentado contornar satélite. São 21 registros, feit...

How Rosetta's Comet Got Its Shape
European Space Agency- 28 September 2015
Two comets collided at low speed in the early Solar System to give rise to the distinctive "rubber duck" shape of Comet 67P/Churyumov-Gerasimenko, say Rosetta scientists.
The origin of the comet's double-lobed form has been a key question since Rosetta first revealed its surprising shape in July 2014. ...

http://arxiv.org/abs/1509.07184
[1509.07184] Origin of Interplanetary Dust through Optical Properties of Zodiacal Light
arxiv.org
http://arxiv.org/abs/1509.07122
[1509.07122] The Physical Characterization of the Potentially-Hazardous Asteroid 2004 BL86: A...
arxiv.org
2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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28 September 2015

NASA to Make MAJOR MARS DISCOVERY ANNOUNCEMENT TODAY! 28SEP2015

NASA to Announce Mars Mystery Solved

Jet Propulsion Laboratory
September 24, 2015

**Nature Geoscience has Embargoed Details until 8 a.m. PDT/11 a.m. EDT
Sept. 28)**

NASA will detail a major science finding from the agency's ongoing exploration
of Mars during a news briefing at 8:30 a.m. PDT (11:30 a.m. EDT) on Monday,
Sept. 28. The event will be broadcast live on NASA Television and the
agency's website.

News conference participants will be:

-- Jim Green, director of planetary science at NASA Headquarters

-- Michael Meyer, lead scientist for the Mars Exploration Program at NASA
Headquarters

-- Lujendra Ojha of the Georgia Institute of Technology in Atlanta

-- Mary Beth Wilhelm of NASA's Ames Research Center in Moffett Field,
California and the Georgia Institute of Technology

-- Alfred McEwen, principal investigator for the High Resolution Imaging
Science Experiment (HiRISE) at the University of Arizona in Tucson

Members of the public can ask questions during the briefing using #AskNASA.

For NASA TV information, schedules and to view the news briefing, visit:

http://www.nasa.gov/nasatv

The event will also be carried live on:

http://www.ustream.tv/NASAJPL

For more information about NASA's journey to Mars:

https://www.nasa.gov/topics/journeytomars

Media Contact
Guy Webster
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-6278
guy.webster@jpl.nasa.gov

Dwayne Brown / Laurie Cantillo
NASA Headquarters, Washington
202-358-1726 / 202-358-1077
dwayne.c.brown@nasa.gov / laura.l.cantillo@nasa.gov

2015-300

2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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ISS Lunar Transit 24SEP2015 Fortaleza, Ceará - Brasil w/ Video

EXCLUSIVE Story!
ISS Lunar Transit on 09/24/2015 at 19h26m28,2s (Local Time) Fortaleza, Ceará - Brasil w/ Video


ISS LunarTransit on 09/24/2015 at 19h26m28,2s (Local Time) Fortaleza, Ceará - Brasil.
C 2015 Lauriston Trindade


The amateurs astronomers Paulo Regis (Clube de Astronomia de Fortaleza) and Lauriston Trindade (Grupo de Astronomia Perseus) catch the valuable picture: the ISS Lunar Transit. The ISS was distant 415km and runnning with 7,66km/s. A short video shows the ISS across the lunar disk (0,14s).
C 2015 Lauriston Trindade

ISS LunarTransit on 09/24/2015 at 19h26m28,2s (Local Time) Fortaleza, Ceará - Brasil.
Short video showing the ISS across the lunar disk (0,14s).
C 2015 Lauriston Trindade
-----
Thank you Lauriston!

2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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Asteroid 2015 SK7- Bus-Sized Asteroid Passed Between Satellites and Earth - Video

Asteroid 2015 SK7- Bus-Sized Asteroid Passed Between Satellites and Earth - Video

Bus-Sized Asteroid Passed Between Satellites and Earth
Posted to YouTube by nemesis maturity 4,504 views
Published on Sep 27, 2015
  Astronomers spotted an asteroid this week after it had flown past Earth on a course that took it so close to the planet it was below the orbits of some satellites.
  The bus-sized space rock (25 feet) flew by Earth
a mere 29,500 km away.This distance is around one tenth the distance of the moon from the Earth.
  The asteroid passed just under the orbits of geostationary satellites, which at 22,300 miles (36,000 kilometers) altitude are the highest man-made objects circling Earth.
Most other satellites, along with the International Space Station, circle the planet at just a few hundred miles up.
  The space rock approached Earth from near the Sun and so would have been nearly impossible to detect prior to close passage.
  Astronomers are aware of this significant blind spot for asteroids that approach Earth while in the glare of the Sun.
  Only a space telescope could detect such objects before they arrive.
  Over the last few decades, scientists are growing increasingly concerned about the risk of a giant space rock crashing into the planet.
While the danger is very real as evidenced by the 2013 
Chelyabinsk incident near misses are actually pretty common.
NASA scientists estimate that around 20 known asteroids pass very close to the Earth every year.

Asteroid 2015 SK7
Distance 0.07 LD - Estimated Size 25 feet
Clsosest approach Sept. 22 2015

2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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27 September 2015

The Latest Worldwide Meteor/Meteorite News 26/27SEP2015

Slooh Webcast on
Space.com
The Slooh Community Observatory will host a free webcast of the supermoon lunar eclipse on Sunday (Sept. 27). You can watch live here, beginning ...

Meteor or 'space junk' spotted over York - expert says it is more likely "illuminated contrails" from a ...
The Press, York
Heworth woman Donna Chamberlain was up with the lark on Friday when she saw what she thought could be a meteor or "space junk" burning up as ...

BLOOD MOON: How to snap TONIGHT'S 'end of world' lunar eclipse 'like a pro'
Express.co.uk
NASA is calling on amateur snappers to try to get the best shot of TONIGHT'S Supermoon before the Blood Moon lunar eclipse in the early hours of ...

Live Webcast of the Supermoon Eclipse
spaceweather.com
This weekend's full Moon is a "supermoon," the biggest and brightest of the year, and it is about to be eclipsed. On Sunday evening, Sept 27th, sky watchers in North America will see the swollen lunar orb glide through the shadow of Earth, turning it a beautiful shade of sunset red. The same eclipse will be visible from South America, Europe, Africa and parts of Asia during the early hours of Sept. 28th. The Coca-Cola Space Science Center is broadcasting the event live at http://www.ccssc.org/webcast.html .

Study adds to evidence that viruses may be alive - Astrobiology Magazine
www.astrobio.netA new analysis supports the hypothesis that viruses are living entities that share a long evolutiona...

NASA to Announce Mars Mystery Solved
www.nasa.govNASA will detail a major science finding from the agency’s ongoing exploration of Mars during a news...

September Doomsday Asteroid: NASA Wasn't Lying About Our Safety
Nature World News
He later added that this prediction was born of a vision God had been showing him over the last 41 years, and that a meteor would strike the coast of ...

Autumn Night Sky: Constellations, Supermoon Eclipse, Meteor
The Weather Network
The supermoon total lunar eclipse occurs in the early hours of Monday morning but there are other celestial wonders to look out for in the autumn night ...

Rare supermoon eclipse: Look to the skies this Sunday for something spectacular
ChronicleLive
Orionids Meteor Shower - October 20: This meteor shower tends to be active in the month of October, usually peaking around October 20. People can ...

Exhiben fragmentos del gran meteorito caído en Rusia
Diario Metro de Puerto Rico
Pequeños fragmentos del impresionante meteorito que en febrero de 2013 cayó en la ciudad de Chelyabinsk, Rusia, forman parte de varias rocas ...

Huestis: October's Morning Planetary Parade & 2 Meteor Showers
GoLocalProv
During October there are two meteor showers of any importance. First up on the night of October 8-9 is the minor display of shooting stars called the ...

Meteor or 'space junk' spotted over York
The Press, York
Heworth woman Donna Chamberlain was up with the lark when she saw what she thought could be a meteor or "space junk" burning up as it entered ... Aircraft CONTRAIL! NOT METEOR!

Fireball/meteor
Spaceweather.com Realtime Image Gallery
Fireball/meteor. Taken by Michele Englund on September 25, 2015 @ Spooner Wisconsin. Click photo for larger image. Camera Used: SAMSUNG ... Aircraft CONTRAIL!  NOT METEOR!

2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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25 September 2015

The Latest Worldwide Meteor/Meteorite News 25SEP2015

'Doomsday meteor' to brush past Earth TODAY, NASA's Asteroid Watch warn
Daily Star
Scientist believe a meteor the size of 2012 TT5 could devastate a continent if it crash landed. But now NASA's Asteroid Watch, who "detect, track ...

Size of meteor-made crater
Physics Stack Exchange
I am reading "What if" piece https://what-if.xkcd.com/20/ and I am very interested in how can one ever estimate the size of a crater? How can you ever ...

Loud bang as meteor disintegrates in the sky of Parana, Brazil
Strange Sounds
A meteor exploded in a loud band in the sky over Parana, Brazil. Witnesses report a large and geen ball of fire falling down to earth before explosion.

NASA: Massive asteroid heading our way today...but it will zoom past us
Scottish Daily Record
The Space Agency has spent the past few months trying to combat claims that a meteor will wipe out humanity at some point this month. Edinburgh ... Such a poor story it is amazing....

Three Myths of the Modern Age
The Real Truth
We counted 21 meteors in an hour. The streaks of light were part of the annual Perseid meteor shower that my wife and I recently observed.

Written by Wayne Gosnell
Blanco County News
There are crazy fringe groups out there who are convinced the Blood Moon on Sunday will be accompanied by an apocalyptic meteorstrike that will ...

Meteor, Oh Meteor, where art thou meteor?
Before It's News
[UPDATE] – Perhaps the meteor was going to hit off Puerto Rico, but as it approached the 'seen in the irfrared only” Planet X, it was enveloped into the ...

2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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Posted by Lunar Meteorite * Hunter at 10:51 am

24 September 2015

The Latest Worldwide Meteor/Meteorite News 24SEP2015

Rondonópolis, Mato Grosso, Brazil Daytime Meteor 21SEP2015 with video
Latest Worldwide Meteor/Meteorite News
Rondonópolis, Mato Grosso, Brazil Daytime Meteor 17:55 Local 21SEP2015 with video. Station: ROO/MT - BRAMON Pequeno daylight registrado ...

Des conspirationnistes craignent la fin du monde le 23 septembre
Le Journal de Montréal
Plusieurs internautes, fanatiques du conspirationnisme et des théories du complot, ont prédit qu'une météorite ou une comète s'écrasera sur Terre, ...

EXCLUSIVE: These THREE asteroids REALLY could HIT Earth and 'wipe out life'
Express.co.uk
FORGET doommongers' predictions a 2.5-miles asteroid NASA knows nothing about will hit Earth this month, because scientists admit these THREE ...

Earth's sixth mass extinction has begun - and there are no signs that humans will be spared
Business Insider
Scientists recently suggested that the Earth’s sixth mass extinction has begun. Life on Earth can be traced back to a single unicellular species, perhaps some 3.5 billion years ago.. ...

Remembering the Vela Incident
Universe Today
36 years ago today, a strange event was detected over the Southern Indian Ocean that remains controversial On September 22nd, 1979, an American Vela Hotel satellite detected an atmospheric explosion over the southern Indian Ocean... the Vela satellites...also famous for discovering evidence for extra-galactic gamma-ray bursts. ...

Massive Meteor Crash in UK Skies April 2015
Disclose.tv
youtubecom/watch?v=ej2hLqMzgnI ...

See a Glowing 'Honey Moon' and Unique Star Trails in New Night Sky Timelapse
Universe Today
A unique 'glowing fireball' resembling a meteor is actually a giant 'honey moon,' and the trailing effect used by tracking the rotation of the Earth's axis ...

The Latest Worldwide Meteor/Meteorite News 23SEP2015
Latest Worldwide Meteor/Meteorite News
The Latest Worldwide Meteor/Meteorite News 23SEP2015. Meteorite from birth of solar system to go on display. The Natural History Museum, London, ...

The writer who believes an advanced civilisation was killed in a meteor strike answers Daily ...
Scottish Daily Record
TOP Scots author Graham Hancock visited our offices today, and answered Facebook questions about his theories of an alternative human history.

2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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NEO Asteroids Close Approaches September 2015

NEO Asteroids Close Approaches September 2015
This Month will be very promising for having new meteorites.
UPDATED!

Click Image
September 2015 NEO Asteroids Close Approaches
c2015 Dirk Ross- Tokyo, Japan
September ALERT- Increased Meteor Activity! 
Expect some spectacular bolides,  fireballs, and meteors this month and especially large ones 3-5 days before and following the passing of  5 or 6 small mountain-sized NEO asteroids and 1 comet, diameters ranging from 500m- 2.0km,  that will safely pass this month.

Please report your meteor sightings to this website for posting- Remember IF you are looking for a report and no one reports then everyone lacks information; thank you.
http://lunarmeteoritehunters.blogspot.jp/2000/11/meteor-fireball-report-form.html

There are currently 1  15 18 known NEO Asteroids discovered that will pass within approximately 10LD or less (LD stands for "Lunar Distance"), in the month of September 2015.
I expect that 10 or more 10LD NEOs will be discovered before month end.
Be ready for some bolide, fireball, and meteor activity!
Cameras Ready!
If you get video or photo of a meteor please email to - LunarMeteoriteHunter@gmail.com
- LunarMeteoriteHunter, Tokyo

ObjectClose-Approach
 (CA) Date Ascending
(TDB)
YYYY-mmm-DD 		CA Distance
Nominal
(LD/AU)		CA Distance
Minimum
(LD/AU)



(2015 RQ36)2015-Sep-01 6.5/0.01676.5/0.0167



(2015 RW2)2015-Sep-04 5.1/0.01325.1/0.0131



(2015 RT82)2015-Sep-04 6.7/0.01736.7/0.0172



(2015 RG2)2015-Sep-07 6.4/0.01646.4/0.0164



(2015 RO83)2015-Sep-09 5.3/0.01375.3/0.0136



(2015 ST)2015-Sep-09 9.9/0.02549.7/0.0249


(2015 RU178)2015-Sep-09 1.4/0.00361.4/0.0036



(2015 RW35)2015-Sep-13 2.1/0.00552.1/0.0055



(2015 SG)2015-Sep-13 5.0/0.01274.9/0.0127



(2014 KS76)2015-Sep-14 8.7/0.02248.7/0.0224



(2015 SA)2015-Sep-15 2.9/0.00752.9/0.0075



(2015 SH)2015-Sep-15 2.5/0.00652.5/0.0065



(2015 SB)2015-Sep-18 10.0/0.02569.9/0.0255



(2015 SM)2015-Sep-18 4.0/0.01034.0/0.0103



(2015 SE)2015-Sep-20 4.2/0.01074.2/0.0107



(2015 SK7)2015-Sep-22 0.07/0.000180.07/0.00018



(2015 SV6)2015-Sep-25 2.3/0.00592.3/0.0059



(2015 SZ2)2015-Sep-30 1.3/0.00341.3/0.0034



http://neo.jpl.nasa.gov/


UPCOMING CLOSE APPROACHES TO EARTH
1 AU = ~150 million kilometers
1 LD = Lunar Distance = ~384,000 kilometers
Object
Name		Close
Approach
Date		CA
Distance*
(AU)		CA
Distance*
(LD)		Estimated
Diameter**		H
(mag)		Relative
Velocity
(km/s)
(2015 OV) 2015-Aug-240.075029.251 m - 110 m23.66.89
(2005 QQ87) 2015-Aug-250.084532.977 m - 170 m22.718.99
(2015 OS78) 2015-Aug-260.084032.7160 m - 370 m21.122.20
(2013 RZ5) 2015-Aug-260.157461.35.6 m - 12 m28.421.73
(2015 PM307) 2015-Aug-270.153859.9120 m - 270 m21.734.37
(2015 QT3) 2015-Aug-280.01074.245 m - 100 m23.926.29
(2015 PT227) 2015-Aug-290.02489.744 m - 98 m23.99.36
(2015 QP3) 2015-Aug-300.060623.641 m - 92 m24.19.30
(2015 QA) 2015-Aug-300.109542.685 m - 190 m22.55.94
250458 (2004 BO41) 2015-Aug-310.147357.3730 m - 1.6 km17.821.39
(2015 PS227) 2015-Aug-310.061023.834 m - 76 m24.58.66
(2004 TD10) 2015-Sep-010.071727.9100 m - 230 m22.111.83
(2006 MV1) 2015-Sep-010.137553.512 m - 26 m26.87.98
281375 (2008 JV19) 2015-Sep-010.044717.4190 m - 430 m20.77.24
(2006 AW) 2015-Sep-020.170666.4560 m - 1.2 km18.413.63
(2012 JU) 2015-Sep-020.160262.35.8 m - 13 m28.315.54
(2014 DA) 2015-Sep-030.166164.677 m - 170 m22.717.47
(2015 QX8) 2015-Sep-040.052020.240 m - 89 m24.110.70
7822 (1991 CS) 2015-Sep-040.159662.1880 m - 2.0 km17.418.95
320P/McNaught 2015-Sep-050.183571.4n/a0.016.28
(2015 PK57) 2015-Sep-050.045117.630 m - 66 m24.811.27
(2015 NS13) 2015-Sep-060.186272.5250 m - 570 m20.112.15
(2009 BK2) 2015-Sep-060.062024.123 m - 52 m25.35.63
(2012 SZ2) 2015-Sep-100.152159.223 m - 52 m25.313.71
(2001 UZ16) 2015-Sep-110.129650.5350 m - 780 m19.48.95
(2012 UV136) 2015-Sep-110.127749.721 m - 47 m25.53.46
(2008 GY21) 2015-Sep-120.132151.48.0 m - 18 m27.615.00
(2015 FU117) 2015-Sep-120.114144.431 m - 68 m24.76.45
(2014 KS76) 2015-Sep-140.02228.713 m - 30 m26.57.59
260277 (2004 TR12) 2015-Sep-150.151258.8610 m - 1.4 km18.214.07
(2015 NK13) 2015-Sep-150.100138.9200 m - 440 m20.611.15
(2013 RO5) 2015-Sep-160.065525.529 m - 65 m24.88.85
(2007 TD) 2015-Sep-210.076929.935 m - 78 m24.414.16
(2001 SQ3) 2015-Sep-220.158561.7130 m - 280 m21.617.48
(2010 QA5) 2015-Sep-220.117245.684 m - 190 m22.520.74
(2015 GA14) 2015-Sep-230.199777.725 m - 57 m25.15.97
(2012 TT5) 2015-Sep-240.055321.5120 m - 270 m21.719.50
(2006 WV1) 2015-Sep-270.085333.218 m - 39 m25.96.73
(2014 GA) 2015-Sep-280.116345.214 m - 31 m26.47.38
(2012 SG32) 2015-Sep-290.118446.1130 m - 280 m21.611.35
(2015 KJ57) 2015-Sep-300.066425.8130 m - 300 m21.57.17
(2008 FX6) 2015-Sep-300.183671.527 m - 59 m25.07.92
http://neo.jpl.nasa.gov/cgi-bin/neo_ca

Source Table- NASA/JPL
-- for the most current version check- http://neo.jpl.nasa.gov/ca/
Self search parameters - http://neo.jpl.nasa.gov/cgi-bin/neo_ca

Source Wikipedia-
---  FYI
Stony asteroids that impact sedimentary rock and create a crater[6]
Impactor
diameter		Kinetic energy at
atmospheric entry		Impact
energy		Crater
diameter		Average
frequency
100 m (330 ft)47 Mt38 Mt1.2 km (0.75 mi)5200 years
130 m (430 ft)103 Mt64.8 Mt2 km (1.2 mi)11000 years
150 m (490 ft)159 Mt71.5 Mt2.4 km (1.5 mi)16000 years
200 m (660 ft)376 Mt261 Mt3 km (1.9 mi)36000 years
250 m (820 ft)734 Mt598 Mt3.8 km (2.4 mi)59000 years
300 m (980 ft)1270 Mt1110 Mt4.6 km (2.9 mi)73000 years
400 m (1,300 ft)3010 Mt2800 Mt6 km (3.7 mi)100000 years
700 m (2,300 ft)16100 Mt15700 Mt10 km (6.2 mi)190000 years
1,000 m (3,300 ft)47000 Mt46300 Mt13.6 km (8.5 mi)440000 years
"6 Robert Marcus, H. Jay Melosh, and Gareth Collins (2010). "Earth Impact Effects Program". Imperial College London / Purdue University. Retrieved 2013-02-04.(solution using 2600kg/m^3, 17km/s, 45 degrees)
Stony asteroid impacts that generate an airburst[6]
Impactor
diameter		Kinetic energy at
atmospheric entry		Airburst
energy		Airburst
altitude		Average
frequency
4 m (13 ft)3 kt0.75 kt42.5 km (139,000 ft)1.3 years
7 m (23 ft)16 kt5 kt36.3 km (119,000 ft)4.6 years
10 m (33 ft)47 kt19 kt31.9 km (105,000 ft)10.4 years
15 m (49 ft)159 kt82 kt26.4 km (87,000 ft)27 years
20 m (66 ft)376 kt230 kt22.4 km (73,000 ft)60 years
30 m (98 ft)1.3 Mt930 kt16.5 km (54,000 ft)185 years
50 m (160 ft)5.9 Mt5.2 Mt8.7 km (29,000 ft)764 years
70 m (230 ft)16 Mt15.2 Mt3.6 km (12,000 ft)1900 years
85 m (279 ft)29 Mt28 Mt0.58 km (1,900 ft)3300 years
"6 Robert Marcus, H. Jay Melosh, and Gareth Collins (2010). "Earth Impact Effects Program". Imperial College London / Purdue University. Retrieved 2013-02-04.(solution using 2600kg/m^3, 17km/s, 45 degrees)

 updated 24SEP2015
updated 23SEP2015
original post 25JUL2015 - EARLY

2015 The SECOND Year of "CERTAIN Uncertainty" ™ / Meteors, Asteroids, Comets, and MORE!!
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