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Asteroid Day
Asteroid Day logo
Observed byWorldwide
TypeUnited Nations
DateJune 30
First time30 June 2015; 8 years ago (2015-06-30)

Asteroid Day (also known as International Asteroid Day) is an annual global event[1] which is held on June 30, the anniversary of the Tunguska event in 1908 when a meteor air burst levelled about 2,150 km2 (830 sq mi) of forest in Siberia, Russia.[2][3][4]

Asteroid Day was cofounded in 2014 (the year after the 2013 Chelyabinsk meteor air burst) by physicist Stephen Hawking, B612 Foundation president Danica Remy, Apollo 9 astronaut Rusty Schweickart, filmmaker Grigorij Richters, and Brian May (Queen guitarist and astrophysicist).[4][5] Remy, Schweickart, Richters, and May initiated[clarification needed] Asteroid Day in October 2014, which they announced during a press conference.[6] It was launched[clarification needed] on December 3, 2014.[7]

In 2016, the United Nations proclaimed Asteroid Day be observed globally on June 30 every year in its resolution.[8] The event aims to raise awareness about asteroids and what can be done to protect the Earth, its families, communities, and future generations from a catastrophic event.


On Asteroid Day 2017, minor planet 248750 (discoverer M. Dawson) was officially named Asteroidday by the International Astronomical Union.[9]

Asteroid Day declaration

In 2014, the workgroup of Asteroid Day created a declaration known as the "100X Declaration", which appeals to all scientists and technologists who support the idea of saving the Earth from asteroids. The 100X Declaration was signed by more than 22,000 private citizens,[clarification needed] including those who are not specialists.[10][11][12][13]

Although more than 1,000,000 asteroids have the potential to strike the Earth, only about one percent have been discovered.[citation needed] The 100X Declaration calls for increasing the asteroid discovery rate to 100,000 (or 100x) per year within the next 10 years. It is hoped that this will bolster efforts for addressing potential strikes.[11]

The main three goals are:

  1. Employ available technology to detect and track near-earth asteroids that threaten human populations via governments and private and philanthropic organizations.
  2. A rapid hundred-fold acceleration of the discovery and tracking of near-earth asteroids to 100,000 per year within the next ten years.
  3. Global adoption of Asteroid Day, heightening awareness of the asteroid hazard and our efforts to prevent impacts, on June 30 – With the United Nations recognition, this action item has been achieved.[14]

Asteroid Day 2015–2019

According to information on, there were over 2,000 events in its first five years of the day being announced, across 78 countries.[15] 41 astronauts and cosmonauts participated in activities on the day.[16] The general goal was to raise awareness about the threat posed by asteroid impacts. Institutions such as Institut de Ciències de l'Espai,[17] the Natural History Museum in Vienna,[18] the American Natural History Museum,[19] the California Academy of Sciences,[20] the Science Museum in London,[21] the SETI Institute,[22] the European Space Agency,[23] the UK Space Agency,[24] among others participated in educational activities.

United Nations

In February 2016, Romanian astronaut Dumitru Prunariu and the Association of Space Explorers submitted a proposal to the Scientific and Technical Subcommittee of the United Nations that was accepted by the subcommittee, and in June 2016, the United Nations Committee on the Peaceful Uses of Outer Space included the recommendation in its report. The report of the committee was presented for approval to the United Nations General Assembly's 71st session, which it approved on December 6, 2016.[25]

In its resolution, the United Nations declares "30 June International Asteroid Day to observe each year at the international level the anniversary of the Tunguska impact over Siberia, Russian Federation on 30 June 1908 and to raise public awareness about the asteroid impact hazard."[26]


  1. ^ "Get set for Asteroid Day". Retrieved 2022-11-25.
  2. ^ Trigo-Rodríguez, Josep M.; Palme, Herbert; Gritsevich, Maria (2017). Trigo-Rodríguez, Josep M.; Gritsevich, Maria; Palme, Herbert (eds.). "Barcelona Asteroid Day 2015: Revisiting the Threat by Asteroid and Comet Impact". Assessment and Mitigation of Asteroid Impact Hazards. Astrophysics and Space Science Proceedings. 46. Cham: Springer International Publishing: 1–9. Bibcode:2017ASSP...46....1T. doi:10.1007/978-3-319-46179-3_1. ISBN 978-3-319-46179-3.
  3. ^ Wall, Mike (2014-12-03). "'Asteroid Day' to Raise Awareness of Space Rock Threat". Retrieved 2022-11-25.
  4. ^ a b "Second anniversary of Chelyabinsk meteorite strike". the Guardian. 2015-02-15. Retrieved 2022-11-25.
  5. ^ "Tributes paid to scientific giant, Professor Stephen Hawking". County Times. 14 March 2018. Retrieved 2022-11-25.
  6. ^ "The Age of Asteroids". The New Yorker. 2014-12-10. Retrieved 2022-11-25.
  7. ^ "Asteroids could wipe out humanity, warn Richard Dawkins and Brian Cox". Retrieved 2022-11-25.
  8. ^ "International Asteroid Day". United Nations. Retrieved 2022-11-25.
  9. ^ Minor Planet Center
  10. ^ Asteroid Day List of Signatories Archived 2017-05-18 at the Wayback Machine
  11. ^ a b "Our story" Archived 2017-07-01 at the Wayback Machine
  12. ^ Rao, Nathan (2015-01-01). "Scores of GIANT asteroids on course to hurtle past Earth within the mo". Retrieved 2022-11-25.
  13. ^ "Asteroid Day Declaration At Science Museum". Science Museum Blog. 4 December 2014. Retrieved 2022-11-25.
  14. ^ Verger, Rob (2016-12-07). "International Asteroid Day will be June 30, UN proclaims". Fox News. Retrieved 2022-11-25.
  15. ^ "Events Archive". Asteroid Day. Retrieved 2022-11-25.
  16. ^ "Get set for Asteroid Day". Retrieved 2022-11-25.
  17. ^ Trigo-Rodríguez, Josep M; Gritsevich, Maria; Palme, Herbert, eds. (2017). Assessment and Mitigation of Asteroid Impact Hazards. Astrophysics and Space Science Proceedings. Vol. 46. doi:10.1007/978-3-319-46179-3. ISBN 978-3-319-46178-6.
  18. ^ "Naturhistorisches Museum Wien - Naturhistorisches Museum Wien". (in German). Retrieved 2022-11-25.
  19. ^ Johnson, Billy (2015-06-30). "Happy Asteroid Day: We Are Woefully Unprepared!". Newsweek. Retrieved 2022-11-25.
  20. ^ "Asteroid Day San Francisco" SpaceRef, June 30, 2015.[permanent dead link]
  21. ^ "Why is Asteroid Day important?". Science Museum Blog. 11 June 2015. Retrieved 2022-11-25.
  22. ^ Asteroid Day Special Event - Michael Busch and Peter Jenniskens (SETI Talks). SETI Institute. July 10, 2015. Archived from the original on June 14, 2022. Retrieved July 5, 2022 – via YouTube.
  23. ^ "Asteroid Day - ESA experts explain the nature and threat of asteroids". Retrieved 2022-11-25.
  24. ^ UK Space Agency [@spacegovuk] (June 30, 2015). "It's #AsteroidDay! @51degreesmovie premiers tonight @sciencemuseum, raising awareness of asteroid threats from space" (Tweet). Archived from the original on October 16, 2021. Retrieved July 5, 2022 – via Twitter.
  25. ^ ESA. "UN recognises 30 June as Asteroid Day".
  26. ^ "UN GA Res 2016 (A_71_492).pdf". Google Docs. Retrieved 2022-11-25.