2020 CW is a tiny near-Earth asteroid of the Apollo group, approximately 1 meter (3 ft) in diameter. It was first observed by the Mount Lemmon Survey on 1 February 2020,[1] when it passed Earth very closely at a nominal distance of only 0.041 lunar distances (0.000105 astronomical units).[2] The object's orbital elements remain highly uncertain.[1][2]

Description

2020 CW passed within 15,660 kilometres (9,730 mi) of the Earth on 1 February 2020, with a fly-by speed of 21.2 kilometres (13.2 mi) per second.[2] The household-appliance-sized asteroid passed within the orbit of satellites in the geostationary ring at 35,900 kilometres (22,300 mi) above Earth's equator.[5] At the time, it was the closest approach in the year 2020. Since then, 2020 JJ made a closer approach on 4 May 2020.[6]

The asteroid was first observed 1 February 2020 by the Mount Lemmon Survey at Mount Lemmon Observatory in the Santa Catalina Mountains northeast of Tucson, Arizona.[1] The next encounter closer than the Moon is predicted to occur 5 February 2029 at a distance of 19,040 kilometres (11,830 mi) or more.[2]

References

  1. ^ a b c d e f g "2020 CW". Minor Planet Center. Retrieved 5 September 2020.
  2. ^ a b c d e f g h "JPL Small-Body Database Browser: (2020 CW)" (2020-02-01 last obs.). Jet Propulsion Laboratory. Retrieved 5 September 2020.
  3. ^ "Asteroid Size Estimator". CNEOS NASA/JPL. Retrieved 5 September 2020.
  4. ^ a b "ESA space situational awareness 2020CW". European Space Agency. Retrieved 29 July 2020.
  5. ^ Mack, Eric (4 February 2020). "Adorable asteroid 2020 CW makes one of the closest passes by Earth ever seen". CNET. It was a harmless flyby for the record books.
  6. ^ "NEO Earth Close Approaches". Center for Near Earth Object Studies (CNEOS). Retrieved 29 July 2020. Table Settings: All available data, Nominal dist. <= 1LD, no H limit, sort by CA Distance Nominal
Allikas: https://en.wikipedia.org/wiki/2020_CW
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