+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11312 (1994 AR2) Classification: Main-belt Asteroid          SPK-ID: 2011312 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1765037206430634 2.5455e-08   a 2.365790610038647 6.1757e-09 au q 1.948219765104403 6.1455e-08 au i .9440465516044835 2.9233e-06 deg node 57.42726172533634 0.00019161 deg peri 199.9232834680168 0.00019182 deg M 325.8078685121816 9.4881e-06 deg tp 2459126.736968477885 (2020-Oct-04.23696848) 3.5164e-05 TDB period 1329.115988812492 3.64 5.2043e-06 1.425e-08 d yr n .2708567220846124 1.0606e-09 deg/d Q 2.78336145497289 7.2657e-09 au   Orbit Determination Parameters    # obs. used (total)      2334      data-arc span      14737 days (40.35 yr)      first obs. used      1980-04-08      last obs. used      2020-08-13      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50199      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:00:23   Additional Information  Earth MOID = .933197 au   Jupiter MOID = 2.27157 au   T_jup = 3.527  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.3   n/a MPO365386   diameter diameter 3.628 km 0.149 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.307   0.018 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11312 (1994 AR2)          Discovered 1994-Jan-14 by Kobayashi, T. at Oizumi Reference: 19990831/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1994 AR2 = 1980 GY1 = 1997 CQ14  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-24 23:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin