Meteoroids

The meteoroid (also written 1998 KY26) was discovered on June 2, 1998 by Spacewatch and observed until June 8 while it passed 800,000 kilometers (half a million miles) away from Earth (a little more than twice the Earth- Moon distance). Somewhat arbitrarily, an object must be at least 50 m in diameter to be considered an asteroid; has a shape similar to a sphere and is about only 30 m (100 ft) in diameter. Its most fascinating characteristic is that it is fast-spinning and water-rich. This discovery is attributed to an international team of astronomers led by Dr. Steven J. Ostro of the Jet Propulsion Laboratory. The team used a radar telescope in California and optical telescopes in the Czech Republic, Hawaii, Arizona and California. ...more on Wikipedia about "1998 KY26"

(also written 2000 SG344) is a meteoroid discovered in 1999. It has a diameter of 0.04 km and an estimated mass of 7.1 × 107 kilograms (71 gigagrams, approximately 3 times the mass of the RMS Titanic). An object must have a diameter of 50 m or more to be classified as an asteroid. ...more on Wikipedia about "2000 SG344"

(also written 2003 YN107) is a very small Near-Earth object. It was discovered by the Lincoln Near Earth Asteroid Research (LINEAR) system in orbit around the Sun on December 20, 2003. Its diameter is approximately 10 to 30 metres, which technically makes it a meteoroid rather than an asteroid (which are arbitrarily considered to have a diameter of 50 m or bigger). is on NASA's Earth Close Approach list, and is estimated to miss the Earth by 0.0599 AU. ...more on Wikipedia about "2003 YN107"

2004 FH is a near-Earth asteroid that was discovered on March 15, 2004 by the NASA-funded LINEAR asteroid survey. The object is roughly 30 metres in diameter and passed just 43,000 km above the Earth's surface on March 18, 2004 at 22:08 UTC; making it the second closest approach to Earth ever recorded at the time (see the diagram below). For comparison, geostationary satellites orbit Earth at 35,790 km. ...more on Wikipedia about "2004 FH"

(also written 2004 FU162) is a meteoroid which passed within about one Earth radius of the surface of the Earth at 15:35 UTC on March 31 2004, or 2.02 Earth radii from the centre of the Earth. This set a record for the closest known approach to date. The discovery was not announced until August 22, 2004. ...more on Wikipedia about "2004 FU162"

2004 HR56 is the professional method of referring to a meteoroid that passed Mars and was visible between April 25 to May 10, 2005. This find was documented as part of the FMO Project and was reported by six different observatories. Reports indicate that the object is about 74 meters/yards wide and an absolute magnitude of 23.28. ...more on Wikipedia about "2004 HR56"

A meteor is the visible path of a meteoroid that enters the Earth's (or another body's) atmosphere, commonly called a shooting star or falling star. For bodies with a size scale larger than the atmospheric mean free path (10 cm to several meters) the visibility is due to the heat produced by the ram pressure (not friction, as is commonly assumed) of atmospheric entry. Since the majority of meteors are from small sand-grain size meteoroid bodies, most visible signatures are caused by dexcitation following the individual collisions between vaporized meteor atoms and atmospheric constituents. ...more on Wikipedia about "Meteor"

Meteor scatter is a radio propagation mode that exploits the ionized trails of meteors during atmospheric entry to establish brief communications paths between radio stations up to 2200 kilometers (1400 miles) apart. ...more on Wikipedia about "Meteor scatter"

A meteoroid is a relatively small (sand- to boulder-sized) fragment of debris in the Solar System. When entering a planet's atmosphere, the meteoroid heats up and partially or completely vaporizes. The gas along the path of the meteoroid becomes ionized and glows. The trail of glowing vapor is called a meteor, or shooting star. If any portion of the meteor survives to reach the ground, it is then referred to as a meteorite. ...more on Wikipedia about "Meteoroid"

A Micrometeoroid (also micrometeorite, micrometeor) is a tiny meteoroid; a small particle of rock from space, usually weighing less than a gram, that poses a threat to space exploration. The risk is especially high for objects in space for long periods of time, such as satellites. They also pose major engineering challenges in theoretical low-cost lift systems such as rotavators, space elevators, and orbital airships. ...more on Wikipedia about "Micrometeoroid"

This article is licensed under the GNU Free Documentation License.
It uses material from the Wikipedia . Direct links to the original articles are in the text.
If you use exact copy or modified of this article you should preserve above paragraph and put also : It uses material from the Shortopedia article about "Meteoroids".
MAIN PAGE MAIN INDEX CONTACT US