2001 AV43
{{Short description|Very small monolithic asteroid and fast rotator}}
{{Use dmy dates|date=February 2018}}
{{DISPLAYTITLE:{{mp|2001 AV|43}}}}
{{Infobox planet
| minorplanet = yes
| background = #FFC2E0
| name = {{mp|2001 AV|43}}
| image =
| caption =
| discoverer = LINEAR
| discovery_site = {{nowrap|Lincoln Laboratory ETS}}
| discovered = 5 January 2001
| mpc_name = {{mp|2001 AV|43}}
| mp_category = NEO{{·}}Apollo
| pronounced =
| named_after =
| alt_names =
| epoch = 27 April 2019 (JD 2458600.5)
| uncertainty = 0
| observation_arc = 13.23 yr (4,834 d)
| aphelion = 1.5929 AU
| perihelion = 0.9744 AU
| semimajor = 1.2836 AU
| eccentricity = 0.2409
| period = 1.45 yr (531 d)
| mean_anomaly = 256.05°
| mean_motion = {{Deg2DMS|0.6777|sup=ms}} / day
| inclination = 0.2013°
| asc_node = 20.505°
| arg_peri = 51.311°
| moid = 0.0017 AU{{·}}0.66 LD
| mean_diameter = {{val|0.03|ul=km}} {{small|(derived)}}
| rotation = {{val|0.1701|ul=h}} {{small|(612 s)}}
| albedo = 0.20 {{small|(assumed)}}
| spectral_type = S {{small|(assumed)}}
}}
{{mp|2001 AV|43}} is a very small, monolithic asteroid and fast rotator, classified as a near-Earth object of the Apollo group, approximately {{convert|30|m|ft|abbr=off|sp=us}} in diameter. It was first observed on 5 January 2001, by astronomers of the LINEAR program at Lincoln Laboratory's Experimental Test Site near Socorro, New Mexico, in the United States. The presumed S-type asteroid has a rotation period of only 10 minutes. It has an exceptionally low MOID of 0.66 lunar distance (LD) and will approach Earth at 0.81 LD on 11 November 2029.
Orbit and classification
{{mp|2001 AV|43}} is a member of the dynamical Apollo group, which are Earth-crossing asteroids. Apollo asteroids are the largest subgroup of near-Earth objects. Unlike many Apollo asteroids, this asteroid is not a Mars-crosser, as its aphelion is smaller than the orbit of the Red Planet at 1.66 AU.
This asteroid orbits the Sun at a distance of 0.97–1.59 AU once every 17 months (531 days; semi-major axis of 1.28 AU). Its orbit has an eccentricity of 0.24 and an inclination of 0° with respect to the ecliptic. The body's observation arc begins with a precovery found in ESO's Astrovirtel data archive {{Obscode|I03}}, in August 2000, less than 5 months prior to its official discovery observation at Socorro.
= Close approaches =
{{mp|2001 AV|43}} has an Earth minimum orbital intersection distance of {{convert |0.0017 |AU |km |abbr=on |lk=off |sigfig=3}}, which translates into 0.7 lunar distances (LD). Due to its small size, that is, an absolute magnitude fainter than 22, this asteroid is not classified as a potentially hazardous asteroid.
On 18 November 2013, the asteroid passed Earth at 2.7 LD. The angle of approach made it a good target for radar observations.
On 11 November 2029, the orbit of {{mp|2001 AV|43}} is predicted to bring the asteroid within a nominal distance of {{convert |0.00209 |AU |km mi |abbr=on |lk=off}} or 0.81 LD of Earth. It will also pass the Moon at an even shorter nominal distance of {{convert |0.00166 |AU |km mi |abbr=on |lk=off}}
Physical characteristics
{{mp|2001 AV|43}} is an assumed stony S-type asteroid.
= Rotation period =
A rotational lightcurve of {{mp|2001 AV|43}} was obtained from photometric observations by American astronomers Robert J. Whiteley, Carl Hergenrother and David Tholen. Lightcurve analysis gave a rotation period of 0.1701 hours (612 second) with a brightness amplitude of 0.26 magnitude ({{small|U=2}}). With such a short period, it is a notable fast rotator. The observers classified it as a "monolithic fast-rotating asteroid" (MFRA).
= Diameter and albedo =
Numbering and naming
As of 2018, this minor planet has neither been numbered nor named.
References
{{reflist|30em|refs=
|type = 2013-11-24 last obs.
|title = JPL Small-Body Database Browser: (2001 AV43)
|url = https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3067828
|publisher = Jet Propulsion Laboratory
|accessdate = 2 November 2018}}
|title = 2001 AV43
|work = Minor Planet Center
|url = https://www.minorplanetcenter.net/db_search/show_object?object_id=2001+AV43
|accessdate = 2 November 2018}}
|author = Jim Borg
|title = Asteroid to make 'close' pass to Earth on Monday
|url = http://www.staradvertiser.com/2013/11/16/breaking-news/asteroid-to-make-close-pass-to-earth-on-monday/
|publisher = Star Advertiser
|date = 16 November 2013}}
|title = LCDB Data for 2001 AV43
|publisher = Asteroid Lightcurve Database (LCDB)
|url = http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=0%7C2001+AV43
|accessdate = 24 January 2018}}
|first1 = R. J. |last1 = Whiteley
|first2 = C. W. |last2 = Hergenrother
|first3 = D. J. |last3 = Tholen
|date = November 2002
|title = Monolithic fast-rotating asteroids
|url = http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2002ESASP.500..473W
|journal = Proceedings of Asteroids
|volume = 500
|pages = 473–480
|bibcode = 2002ESASP.500..473W
|access-date= 24 January 2018}}
}}
External links
- [http://www.brera.mi.astro.it/sormano/teca.html Table of Asteroids Next Closest Approaches to the Earth], Sormano Astronomical Observatory
- [http://www.minorplanet.info/PHP/lcdbsummaryquery.php Asteroid Lightcurve Database (LCDB)], query form ([http://www.minorplanet.info/lightcurvedatabase.html info] {{Webarchive|url=https://web.archive.org/web/20171216050541/http://www.minorplanet.info/lightcurvedatabase.html |date=16 December 2017 }})
- [http://obswww.unige.ch/~behrend/page_cou.html Asteroids and comets rotation curves, CdR] – Observatoire de Genève, Raoul Behrend
- [https://www.minorplanetcenter.net/iau/lists/CloseApp.html Forthcoming Close Approaches To The Earth] – Minor Planet Center
- {{NeoDys|2001AV43}}
- {{ESA-SSA|2001AV43}}
- {{JPL small body}}
{{Small Solar System bodies}}
{{Authority control}}
{{DEFAULTSORT:2001 AV43}}