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The material in the subsection "Close approaches and forecasts" doesn't belong in the Impact event article; they didn't cause impacts. Here is the text copy-and-pasted if someone wants to incorporate it into this article:
For some reason it created its own section. It follows this one.
Bettymnz4 ( talk) 03:01, 7 April 2010 (UTC)
On May 19, 1996, a 300 to 500 m (980 to 1,640 ft) asteroid, 1996 JA1, passed within 450,000 km (279,617 mi) of Earth; it had been detected a few days before.
On March 18, 2004 a 30 m asteroid, 2004 FH, passed within 40,000 km of Earth only a few days after it had been detected. This asteroid probably would have detonated in the atmosphere and posed negligible hazard to the surface, had it been on impact course.
On March 31, 2004, a 6 m (20 ft) meteoroid, 2004 FU162 made the second-closest approach on record (closest so far was The Great Daylight 1972 Fireball) with a separation of only 1.02 Earth radii from the surface (6,500 kilometres (4,039 mi) *). Because this object is certainly too small to pass through the atmosphere, it is classed as a meteoroid rather than an asteroid.
In 2004, a newly discovered 320 m (1,050 ft) asteroid, 99942 Apophis (previously called 2004 MN4), achieved the highest impact probability of any potentially dangerous object. The probability of collision on April 13, 2029 is estimated to be as high as 1 in 17 by Steve Chesley of NASA's Jet Propulsion Laboratory, though the previously published figure was the slightly lower odds of 1 in 37, calculated in December 2004. Later observations showed that the asteroid will miss the earth by 25,600 km (15,907 mi) (within the orbits of communications satellites) in 2029, but its orbit will be altered unpredictably in a way which does not rule out a collision on April 13 or 14, 2036 or later in the century. These possible future dates have a cumulative probability of 1 in 45,000 for an impact in the 21st century.
Asteroid 2004 VD17, of 580 m (1,903 ft), previously was estimated to have a probability of 1 in 63,000 of striking earth on May 4, 2102 (as of July 2006), with risk 1 on the Torino scale, but further observations lowered the estimate. As of the observation on December 17, 2006, JPL assigns 2004 VD17 a Torino value of 0 and an impact probability of 1 in 41.667 million in the next 100 years.
Asteroid (29075) 1950 DA has a potential to collide with Earth on March 16, 2880. The probability of impact is either 1 in 300 or zero, depending on which one of the two possible directions for the asteroid's spin pole is correct. This asteroid has a mean diameter of about 1.1 km (0.68 mi). The energy released by the collision would cause major effects on the climate and biosphere and may be devastating to human civilization.
Asteroid 2007 TU24, with an estimated diameter between 300 to 500 m (984 to 1,640 ft), came very close to earth orbit by 1.4 ld ( lunar distance) on January 29, 2008. The orbit of the asteroid is shown on NASA's website. [1]
Relatively small objects that burn up in the atmosphere can be dangerous beyond their own capabilities. In 2002, U.S. Air Force Brig. Gen. Simon P. Worden told members of a U.S. House of Representatives Science subcommittee that the U.S. has instruments that determine if an atmospheric explosion is natural or man-made, but no other nation with nuclear weapons has that detection technology. He said there is concern that some of those countries could mistake a natural explosion for an attack, and launch nuclear retaliation. In the summer of 2001 U.S. satellites had detected over the Mediterranean an atmospheric flash of energy similar to a nuclear weapon, but determined that it was caused by an asteroid.
As of March 2008, the Near-Earth Asteroid with the highest probability of impact within the next 100 years is 2007 VK184, with a Torino scale of 1. [2] [3] [4]
Bettymnz4 ( talk) 03:00, 7 April 2010 (UTC)
With all due respect to the editors who worked on this admittedly important section, I found the version I saw yesterday to be very problematic:
Sadly, what appears to be the seminal work on observational biases, Bottke (2000), is behind a paywall, and I didn't find a good popular-science-level overview article either, so the section could probably still see significant improvement. Rontombontom ( talk) 10:27, 26 January 2024 (UTC)
The five diagrams presently included in the article are all problematic for different reasons. I made a request for a new diagram at WP:GLI. Rontombontom ( talk) 17:24, 27 January 2024 (UTC)
Ok placeholder here. Aim is to address as much as possible before going there. Cas Liber ( talk · contribs) 19:40, 31 January 2024 (UTC)
I think it is still jumpy - I would place the Number and classification section directly under Definition (as material similar), then all the History of human awareness of NEOs section (down to and including risk) then the Exploratory missions section. This is the best way I can think of to minimse subject matter jumping back and forth. Might also allow for some reduction Cas Liber ( talk · contribs) 12:48, 6 March 2024 (UTC)
While the article has a section on "Artificial near-Earth objects" they aren't mentioned in the lead. Putting a mention there might give undue weight to the topic; perhaps merely adding the word "natural" somewhere in the lead would improve the article? ( sdsds - talk) 22:07, 31 January 2024 (UTC)
While obvious to the knowledgeable reader familiar with small solar system body topics, the article might be improved for general readers by explicitly mentioning that Earth's Moon is not considered a near-Earth object since it is a natural satellite. ( sdsds - talk) 22:18, 31 January 2024 (UTC)
Again considering the general reader rather than the specialist, There's a key aspect captured by a sentence currently in the second section: "NEOs are thus not necessarily currently near the Earth, but they can potentially approach the Earth relatively closely." Consider moving that to be the last sentence of the lede paragraph. ( — 𝐬𝐝𝐒𝐝𝐬 — - talk) 23:32, 15 February 2024 (UTC)
Been busy - gonna read through soon. Another thought - article defines as is any small Solar System body with an orbit around the Sun that can bring it near the Earth. - but is it not anything closer to the sun than earth or are there any really close objects to the sun that are not NEOs? Cas Liber ( talk · contribs) 22:44, 4 March 2024 (UTC)
Please review my recent edit in the Exploratory missions section. It attempts to get at the concept of delta-v being a measure of acceleration rather than velocity. Another way to do this might be to explicitly link Δv.
I suggest renaming the 'Definitions' section to 'Cataloging' and center the focus of the section on that. ( — 𝐬𝐝𝐒𝐝𝐬 — - talk) 23:54, 6 March 2024 (UTC)
This is the
talk page for discussing improvements to the
Near-Earth object article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
Archives: Index, 1Auto-archiving period: 90 days |
This
level-5 vital article is rated GA-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | ||||||||||||||||||||||||
|
Near-Earth object has been listed as one of the Natural sciences good articles under the good article criteria. If you can improve it further, please do so. If it no longer meets these criteria, you can reassess it. | |||||||||||||
| |||||||||||||
A
fact from this article appeared on Wikipedia's
Main Page in the "
Did you know?" column on
March 23, 2018. The text of the entry was: Did you know ... that the search for
near-Earth asteroids large enough to cause a global catastrophe (example pictured) is almost complete, and efforts now focus on smaller asteroids? | |||||||||||||
Current status: Good article |
Daily pageviews of this article
A graph should have been displayed here but
graphs are temporarily disabled. Until they are enabled again, visit the interactive graph at
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The material in the subsection "Close approaches and forecasts" doesn't belong in the Impact event article; they didn't cause impacts. Here is the text copy-and-pasted if someone wants to incorporate it into this article:
For some reason it created its own section. It follows this one.
Bettymnz4 ( talk) 03:01, 7 April 2010 (UTC)
On May 19, 1996, a 300 to 500 m (980 to 1,640 ft) asteroid, 1996 JA1, passed within 450,000 km (279,617 mi) of Earth; it had been detected a few days before.
On March 18, 2004 a 30 m asteroid, 2004 FH, passed within 40,000 km of Earth only a few days after it had been detected. This asteroid probably would have detonated in the atmosphere and posed negligible hazard to the surface, had it been on impact course.
On March 31, 2004, a 6 m (20 ft) meteoroid, 2004 FU162 made the second-closest approach on record (closest so far was The Great Daylight 1972 Fireball) with a separation of only 1.02 Earth radii from the surface (6,500 kilometres (4,039 mi) *). Because this object is certainly too small to pass through the atmosphere, it is classed as a meteoroid rather than an asteroid.
In 2004, a newly discovered 320 m (1,050 ft) asteroid, 99942 Apophis (previously called 2004 MN4), achieved the highest impact probability of any potentially dangerous object. The probability of collision on April 13, 2029 is estimated to be as high as 1 in 17 by Steve Chesley of NASA's Jet Propulsion Laboratory, though the previously published figure was the slightly lower odds of 1 in 37, calculated in December 2004. Later observations showed that the asteroid will miss the earth by 25,600 km (15,907 mi) (within the orbits of communications satellites) in 2029, but its orbit will be altered unpredictably in a way which does not rule out a collision on April 13 or 14, 2036 or later in the century. These possible future dates have a cumulative probability of 1 in 45,000 for an impact in the 21st century.
Asteroid 2004 VD17, of 580 m (1,903 ft), previously was estimated to have a probability of 1 in 63,000 of striking earth on May 4, 2102 (as of July 2006), with risk 1 on the Torino scale, but further observations lowered the estimate. As of the observation on December 17, 2006, JPL assigns 2004 VD17 a Torino value of 0 and an impact probability of 1 in 41.667 million in the next 100 years.
Asteroid (29075) 1950 DA has a potential to collide with Earth on March 16, 2880. The probability of impact is either 1 in 300 or zero, depending on which one of the two possible directions for the asteroid's spin pole is correct. This asteroid has a mean diameter of about 1.1 km (0.68 mi). The energy released by the collision would cause major effects on the climate and biosphere and may be devastating to human civilization.
Asteroid 2007 TU24, with an estimated diameter between 300 to 500 m (984 to 1,640 ft), came very close to earth orbit by 1.4 ld ( lunar distance) on January 29, 2008. The orbit of the asteroid is shown on NASA's website. [1]
Relatively small objects that burn up in the atmosphere can be dangerous beyond their own capabilities. In 2002, U.S. Air Force Brig. Gen. Simon P. Worden told members of a U.S. House of Representatives Science subcommittee that the U.S. has instruments that determine if an atmospheric explosion is natural or man-made, but no other nation with nuclear weapons has that detection technology. He said there is concern that some of those countries could mistake a natural explosion for an attack, and launch nuclear retaliation. In the summer of 2001 U.S. satellites had detected over the Mediterranean an atmospheric flash of energy similar to a nuclear weapon, but determined that it was caused by an asteroid.
As of March 2008, the Near-Earth Asteroid with the highest probability of impact within the next 100 years is 2007 VK184, with a Torino scale of 1. [2] [3] [4]
Bettymnz4 ( talk) 03:00, 7 April 2010 (UTC)
With all due respect to the editors who worked on this admittedly important section, I found the version I saw yesterday to be very problematic:
Sadly, what appears to be the seminal work on observational biases, Bottke (2000), is behind a paywall, and I didn't find a good popular-science-level overview article either, so the section could probably still see significant improvement. Rontombontom ( talk) 10:27, 26 January 2024 (UTC)
The five diagrams presently included in the article are all problematic for different reasons. I made a request for a new diagram at WP:GLI. Rontombontom ( talk) 17:24, 27 January 2024 (UTC)
Ok placeholder here. Aim is to address as much as possible before going there. Cas Liber ( talk · contribs) 19:40, 31 January 2024 (UTC)
I think it is still jumpy - I would place the Number and classification section directly under Definition (as material similar), then all the History of human awareness of NEOs section (down to and including risk) then the Exploratory missions section. This is the best way I can think of to minimse subject matter jumping back and forth. Might also allow for some reduction Cas Liber ( talk · contribs) 12:48, 6 March 2024 (UTC)
While the article has a section on "Artificial near-Earth objects" they aren't mentioned in the lead. Putting a mention there might give undue weight to the topic; perhaps merely adding the word "natural" somewhere in the lead would improve the article? ( sdsds - talk) 22:07, 31 January 2024 (UTC)
While obvious to the knowledgeable reader familiar with small solar system body topics, the article might be improved for general readers by explicitly mentioning that Earth's Moon is not considered a near-Earth object since it is a natural satellite. ( sdsds - talk) 22:18, 31 January 2024 (UTC)
Again considering the general reader rather than the specialist, There's a key aspect captured by a sentence currently in the second section: "NEOs are thus not necessarily currently near the Earth, but they can potentially approach the Earth relatively closely." Consider moving that to be the last sentence of the lede paragraph. ( — 𝐬𝐝𝐒𝐝𝐬 — - talk) 23:32, 15 February 2024 (UTC)
Been busy - gonna read through soon. Another thought - article defines as is any small Solar System body with an orbit around the Sun that can bring it near the Earth. - but is it not anything closer to the sun than earth or are there any really close objects to the sun that are not NEOs? Cas Liber ( talk · contribs) 22:44, 4 March 2024 (UTC)
Please review my recent edit in the Exploratory missions section. It attempts to get at the concept of delta-v being a measure of acceleration rather than velocity. Another way to do this might be to explicitly link Δv.
I suggest renaming the 'Definitions' section to 'Cataloging' and center the focus of the section on that. ( — 𝐬𝐝𝐒𝐝𝐬 — - talk) 23:54, 6 March 2024 (UTC)