(163899) 2003 SD220

Sub-kilometer asteroid and tumbling slow rotator October 2019 yes (163899) 2003 SD 220 #FFC2E0 2003 SD220 - PIA22970 crop.png Radar image of 2003 SD 220 from Arecibo Observatory on 16 December 2018 LONEOS Anderson Mesa Stn. 29 September 2003 (163899) 2003 SD 220 2000 AD 229 NEOPHAAten 4 September 2017 (JD 2458000.5) 0 15.96 yr (5,828 days) 1.0019 AU 0.6533 AU 0.8276 AU 0.2106 0.75 yr (275 days) 322.67° 1.3092 ms / day 8.4591° 274.05° 326.47° 0.0174 AU6.8 LD 0.80 0.02 km1.03 km (calculated) 285 5 hlightcurve-plot-Warner11.9 0.2 days 0.20 (assumed)0.31 0.04 S (assumed) 17.317.36 13.5 (2021 peak) (163899) 2003 SD 220 is a sub-kilometer asteroid and tumbling slow rotator, classified as a near-Earth object and potentially hazardous asteroid of the Aten group, which orbit the Sun between Venus and Earth. Its orbital period of 0.75 years means that it orbits the Sun about 4 times for every 3 of the Earth. It was discovered on 29 September 2003, by astronomers of the Lowell Observatory Near-Earth-Object Search at Anderson Mesa Station near Flagstaff, Arizona. Earth flybys 2015–2027 thumb|left|Orbit diagram showing 2003 SD 220 and the inner Solar System thumb|left|Minimum distances from 2009 to 2027 It passed about 28 lunar distances (LD) from the Earth on 25 December 2015. It came within about 7 LD (0.0189 AU) on 22 December 2018. Its peak brightness was about 13.13 magnitude on 16 December 2018. Observations are planned for favorable flybys in 2021, 2024, and 2027. It passed with 14 LD (0.0363 AU) on 17 December 2021, and 34 LD (0.0884 AU) on 2 December 2024, and 54 LD (0.1382 AU) on 12 November 2027. Patrick Taylor of Arecibo Observatory suggested it could be a target for a future robotic mission.Silent Night: Asteroid 2003 SD220 Sleighs by Earth on Christmas Eve https://web.archive.org/web/20160810170807/http://sservi.nasa.gov/articles/silent-night-asteroid-2003-sd220-sleighs-by-earth-on-christmas-eve/ 2016-08-10 Arecibo Observatory +Close approach Date JPL SBDBnominal geocentricdistance uncertaintyregion(3-sigma)2021-12-17 5427633 km ± 22 km left 2015 It was observed in December 2015 at a distance of 28.3 lunar distances (0.07296 AU) on 24 December, and its brightest was 15.22 magnitude on 16 December. It showed an elongated shape, up to 2 km wide, described as being shaped like a sweet potato.November 2024 GDSCCArecibo Observatory180px17 December 2015150px22 December 2015260px3–16 December 2015 + Path of asteroid during December 2015 (3 day motion)640px Closest flyby 2018 2003 SD 220 passed its closest distance of 7.34 LD (0.01899 AU) on 22 December 2018. It was on the list of Goldstone targets for December 2018 https://echo.jpl.nasa.gov/asteroids/goldstone_asteroid_schedule.html Goldstone Asteroid Schedule to gain more information for the Near-Earth Object Human Space Flight Accessible Targets Study (NHATS).https://cneos.jpl.nasa.gov/nhats/intro.html Accessible NEAs 640pxAsteroid 2003 SD 220 radar images (15–17 December 2018)Agle DC Brown Dwayne Wendel JoAnna Blue Charles Correa Ricardo Holiday Asteroid Imaged with NASA Radar https://www.jpl.nasa.gov/news/news.php?feature=7312 21 December 2018 NASA 21 December 2018 Its peak brightness was about 13.1 magnitude on 16 December 2018, moving south from Ursa Major and Boötes into Ophiuchus at closest approach and into Sagittarius. + The daily motion of 163899 2003 SD 220 in December 2018640px 2021 2003 SD 220 passed at a distance of 14.1  lunar distances (0.03628 AU) on 17 December 2021. It was observed by the Goldstone Solar System Radar from November to December 2021. 180px22 November 2021 640px Notes lightcurve-plot-Warner Lightcurve plot of (163899) 2003 SD 220, by Brian Warner, Palmer Divide Station, California (2015). Rotation period of 285 5 hours with a brightness amplitude of 2.2 0.1 mag. Quality Code 2+. Summary figures at the LCDB References 30em 2021-11-01 last obs. JPL Small-Body Database Browser: 163899 (2003 SD220) https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=163899&view=OPC Jet Propulsion Laboratory 22 November 2017 163899 (2003 SD220) Minor Planet Center https://www.minorplanetcenter.net/db_search/show_object?object_id=163899 22 November 2017 163899 22 November 2017 6 C. R. Nugent A. Mainzer J. Bauer R. M. Cutri E. A. Kramer T. Grav J. Masiero S. Sonnett E. L. Wright September 2016 NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos The Astronomical Journal 152 3 12 2016AJ....152...63N 10.3847/0004-6256/152/3/63 1606.08923 119289027 free Warner, Brian D. April 2016 Near-Earth Asteroid Lightcurve Analysis at CS3-Palmer Divide Station: 2015 October–December The Minor Planet Bulletin 43 2 143–154 32455373 7243997 1052-8091 2016MPBu...43..143W External links Radar Images of a Christmas-Eve Asteroid: An Early Gift for Astronomers Goldstone, JPL, 23 December 2015 No, a "Massive" Asteroid Passing Earth on Thursday Will Not Cause Earthquakes By Phil Plait, 21 December 2015 Foster Cyrus Daniels Matthew Mission Opportunities for Human Exploration of Nearby Planetary Bodies 2016 physics.space-ph 1610.05437 163899 163899 2003SD220 163899 (163899) 2003 SD 220 163899 163899 163899 163899 Category:Near-Earth objects in 2018 20030929 Category:Radar-imaged asteroids