Kosmos 2421 Explained

Kosmos 2421 (Cosmos 2421) was a Russian reconnaissance satellite launched in 2006, but began fragmenting in early 2008.[1] It also had the Konus-A science payload designed by Ioffe Institute to detect gamma-ray bursts.[2] Three separate fragmentation events produced about 500 pieces of trackable debris.[1] About half of those had already re-entered Earth's atmosphere by the fall of 2008.[3]

Satellite life span

Kosmos 2421 was launched on June 25, 2006, on a Tsyklon-2 from the Site 90/20 launch pad at Baikonur.[4] Other designations are 2006-026A and NORAD 29247.[4] It is a US-PU/Legenda type satellite, and was in a 65 degree, 93 minute circular orbit 410–430 km up.[4] The main body of the satellite finally re-entered and burned up on 19 August 2010.[5]

There have been 190 known satellite breakups between 1961 and 2006.[6] Kosmos 2421 was one of the top ten space debris producing events up to 2012.[7] There was estimated to be 500,000 pieces of debris in orbit at that time.[7]

Space station maneuver

On August 27, 2008, the International Space Station (ISS) fired the boosters of the Jules Verne automated transfer vehicle to avoid debris fragment 33246 from the remains of Kosmos 2421.[8] Without a change, that piece was predicted to have a 1 in 72 chance of hitting the station.[8] Kosmos 2421 had been in a higher orbit than ISS, so when ISS's apogee (high point of orbit) surpassed the debris field's perigee (low point of orbit), many fragments would cross ISS's orbit.[8]

See also

External links

Notes and References

  1. http://orbitaldebris.jsc.nasa.gov/quarterly-news/pdfs/ODQNv12i3.pdf Orbital Debris Quarterly News - Volume 12 Issue 3
  2. Web site: US-A/P ocean-surveillance satellites. 2021-02-12. www.russianspaceweb.com.
  3. Podvig. Pavel. 2008-03-20. Cosmos-2421 completed its mission. Russian Strategic Nuclear Forces.
  4. Podvig. Pavel. 2006-06-25. Launch of Cosmos-2421 naval reconnaissance satellite. Russian Strategic Nuclear Forces.
  5. Web site: Cosmos 2421 . 2012-12-18 . https://web.archive.org/web/20170310054448/http://www.aerospace.org/cords/reentry-predictions/past-reentries-2010-2/2006026a/ . 2017-03-10 . dead .
  6. Web site: AN ANALYSIS OF RECENT MAJOR BREAKUPS IN THE LOW EARTH ORBIT REGION . 2012-12-18 . 2016-03-04 . https://web.archive.org/web/20160304031140/http://www.iafastro.net/iac/archive/browse/IAC-10/A6/2/6484/ . dead .
  7. Web site: DARPA wants army of networked amateur astronomers to watch sky for space junk, aliens . Stratrisks . 2012-11-14 . https://web.archive.org/web/20121119052141/http://stratrisks.com/geostrat/9353 . 2012-11-19 .
  8. https://web.archive.org/web/20090320174005/http://orbitaldebris.jsc.nasa.gov/newsletter/pdfs/ODQNv12i4.pdf Orbital Debris Quarterly News - Volume 12 Issue 4