2010 RF12 - Asteroid - astro.wikisort.org

astro.wikisort.org - Asteroid

2010 RF₁₂ is a very small asteroid, classified as near-Earth object of the Apollo group, that passed between Earth and the Moon on 8 September 2010, at 21:12 UTC, approaching Earth within 79,000 kilometres (49,000 mi) above Antarctica.[5] The asteroid was discovered by the Mount Lemmon Survey near Tucson, Arizona on 5 September 2010 along with 2010 RX30.[1][6] Based on a short 7-day observation arc from that apparation, it was listed for 12 years on the Sentry Risk Table as the asteroid with the greatest known probability (5%) of impacting Earth.[7][note 1] 2010 RF₁₂ was recovered in August 2022,[8][1] and now has a 12 year observation arc and a much better known orbit. There is an insignificant 1-in-63,000 chance of an Earth impact on 5 September 2120.[4]

Earth Approach on 5 September 2095 with a 12-year observation arc[3]
Date	Impact probability	JPL Horizons nominal geocentric distance (AU)	uncertainty region (3-sigma)
2095-09-05 23:39 ± 00:07	none	0.00088 AU (132 thousand km)[3]	±15 thousand km[9]

2010 RF₁₂
Discovery[1][2]
Discovered by	Mount Lemmon Srvy.
Discovery site	Mount Lemmon Obs.
Discovery date	5 September 2010
Designations
MPC designation	2010 RF₁₂
Minor planet category	NEO · Apollo[1][3]
Orbital characteristics[3]
Epoch 2022-Aug-09 (JD 2459800.5)
Uncertainty parameter 0[1][3]
Observation arc	11.98 years
Aphelion	1.26 AU
Perihelion	0.86075 AU
Semi-major axis	1.060 AU
Eccentricity	0.18825
Orbital period (sidereal)	1.09 yr (399 d)
Mean anomaly	264°
Mean motion	0° 54^m 9^s / day
Inclination	0.88352°
Longitude of ascending node	163.8°
Time of perihelion	2022-Nov-23[3]
Argument of perihelion	267.6°
Earth MOID	0.00067 AU (100 thousand km; 0.26 LD)
Physical characteristics
Mean diameter	7 m[4] 6–12 meters (CNEOS)
Absolute magnitude (H)	28.4[1][3]

Description

NASA's Near Earth Program estimates its size to be 7 meters (23 feet) in diameter with a mass of around 500 tonnes.[4] 2010 RF₁₂ will make many more close approaches to Earth.[3] On 5 September 2095 it will pass 131000 ± 15000 km from Earth.[3][9] When an asteroid roughly 7-meters in diameter does impact Earth, there is very little danger of harm arising from such an impact; rather there is expected to be an impressive fireball (estimated in the Risk table as nearly 9 KT of energy release[4]) as the rock air bursts in the upper atmosphere and pebble sized fragments would likely fall to the ground at terminal velocity.[10] The power of the airburst would be somewhere between the 2–4 m Sutter's Mill meteorite and the 17 m Chelyabinsk meteor (which was 440 KT equivalent energy).[11]

(Expired) virtual impactors with a 7-day observation arc[4]
Date	Impact probability (1 in)	JPL Horizons nominal geocentric distance (AU)	NEODyS nominal geocentric distance (AU)	MPC nominal geocentric distance (AU)	Find_Orb nominal geocentric distance (AU)	uncertainty region (3-sigma)
2095-09-05 23:46	22	0.000201 AU (30.1 thousand km)	0.0001 AU (15 thousand km)[12]	0.00055 AU (82 thousand km)	0.00096 AU (143,000 km)[13]	±700 thousand km[14]
2096-09-04 21:50	12000	1.27 AU (190 million km)	1.47 AU (220 million km)	0.49 AU (73 million km)	0.14 AU (21 million km)	±2 billion km[15]

Notes

Many small and harmless asteroids (less than ~10 meters in diameter) impact Earth every year but very few are discovered and predicted, see Asteroid impact prediction.

References

"2010 RF12". Minor Planet Center$. 8 September 2010. Retrieved 21 January 2020.
"MPEC 2010-R41 : 2010 RF12". IAU Minor Planet Center. 5 September 2010. Retrieved 17 April 2014. (K10R12F)
"JPL Small-Body Database Browser: (2010 RF12)" (2010-09-08 last obs.). Jet Propulsion Laboratory. Archived from the original on 12 June 2022. Retrieved 15 November 2020.
"Earth Impact Risk Summary: 2010 RF12". NASA/JPL Near-Earth Object Program Office. Archived from the original on 22 January 2017. Retrieved 16 April 2014.
"Harvard scientists keep an eye on wayward asteroids". Boston Globe Media Partners. 8 September 2010. Archived from the original on 9 September 2010. Retrieved 21 January 2020.
"Second Asteroid to Buzz Earth Later Today". National Geographic. 8 September 2010. Retrieved 21 January 2020.
"Sentry Risk Table". NASA/JPL Near-Earth Object Program Office. Archived from the original on 11 September 2010. Retrieved 27 January 2018.
"MPEC 2022-S77 : 2010 RF12". IAU Minor Planet Center. 19 September 2022. Retrieved 19 September 2022.
"Horizons Batch for 2095-09-05 23:39 Earth Approach". JPL Horizons. Archived from the original on 19 September 2022. Retrieved 19 September 2022. RNG_3sigma = uncertainty range in km. (JPL#24/Soln.date: 2022-Sep-19 generates RNG_3sigma = 14938 for 2095-Sep-05 23:39.)
How a Near-Earth Object Impact Might Affect Society, 9 January 2003, Clark R. Chapman, SwRI, Boulder CO USA
"Five Years after the Chelyabinsk Meteor: NASA Leads Efforts in Planetary Defense". NASA Planetary Defense Coordination Office. Archived from the original on 2 January 2022. Retrieved 19 January 2022.
"2010RF12 Ephemerides for 5−6 September 2095". NEODyS (Near Earth Objects – Dynamic Site). Archived from the original on 6 July 2022. Retrieved 21 January 2020. (NEODyS Close Approach Table))
"Find_Orb for 2095-09-06". Project Pluto. Archived from the original on 6 July 2022. Retrieved 6 July 2022.
"Horizons Batch for 2095-09-05 23:46 Virtual Impactor Time". JPL Horizons. Archived from the original on 12 June 2022. Retrieved 12 June 2022. RNG_3sigma = uncertainty range in km. (JPL#22/Soln.date: 2021-Apr-15 generates RNG_3sigma = 764112 for 2095-Sep-05 23:46.)
"Horizons Batch for 2096-09-04 21:50 Virtual Impactor Time". JPL Horizons. Archived from the original on 7 July 2022. Retrieved 7 July 2022.
"2010RF12 Ephemerides for Aug-Sep 2022". NEODyS (Near Earth Objects – Dynamic Site). Archived from the original on 18 December 2020. Retrieved 17 December 2020.

External links

Risk corridor over Southern Hemisphere
2010 RF12: A second asteroid will buzz the Earth today, csmonitor.com, September 8, 2010
Early warning for close approaches of two house-sized asteroids, The Planetary Society, September 8, 2010
2010 RF12 at NeoDyS-2, Near Earth Objects—Dynamic Site
- Ephemerides · Observation prediction · Orbital info · MOID · Proper elements · Observational info · Close approaches · Physical info · Orbit animation
2010 RF12 at ESA–space situational awareness
- Ephemerides · Observations · Orbit · Physical properties · Summary
2010 RF12 at the JPL Small-Body Database
- Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters

v t e Planetary defense
Main topics	Asteroid Bolide Earth-grazing fireball Impact event Meteor air burst Meteor procession Meteor shower Meteorite Meteoroid Near-Earth object Potentially hazardous object
Defense	Asteroid impact avoidance Asteroid laser ablation Gravity tractor Ion-beam shepherd Asteroid close approaches Earth-crossing minor planets Damage scales Palermo scale Torino scale
Space probes	Dawn Deep Impact AIDA Hera DART Halley Armada Hayabusa Hayabusa2 MASCOT NEAR Shoemaker NEA Scout New Horizons OSIRIS-REx PROCYON Rosetta Philae Stardust
NEO tracking	ATLAS Catalina Sky Survey LINEAR LONEOS NEAT NEODyS NEOSM NEOSSat OGS Telescope Orbit@home Pan-STARRS SCAP Sentinel Space Telescope Sentry Spacewatch WISE
Organizations	B612 Foundation Japan Spaceguard Association Meteoritical Society NEOShield Spaceguard The Spaceguard Foundation Space Situational Awareness Programme Planetary Defense Coordination Office
Potential threats	1950 DA 101955 Bennu 2010 RF₁₂ 99942 Apophis
Related categories	Impact events Fiction about meteoroids Impact events in fiction

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Designation Groups List Moon Meanings of names
Asteroid	Active Aten asteroid Asteroid belt Family Jupiter trojan Near-Earth Spectral types
Distant minor planet	Cis-Neptunian object Centaur Neptune trojan Damocloid Trans-Neptunian object Detached Kuiper belt Oort cloud Scattered disc

Comets

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На других языках

- [en] 2010 RF12

[es] 2010 RF12

2010 RF12 es un asteroide cercano a la Tierra que paso entre la Tierra y la Luna el 8 de septiembre de 2010 a las 21:12 UTC, acercándose a la Tierra dentro de 79 000 kilómetros sobre la Antártida.[1]

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