+ 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 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1765037211436846 2.5488e-08   a 2.365790610217937 6.2005e-09 au q 1.948219764067683 6.1511e-08 au i .9440465506613888 2.9239e-06 deg node 57.42725007356028 0.000193 deg peri 199.9232952974233 0.00019321 deg M 325.8078682289981 9.5414e-06 deg tp 2459126.736969537745 (2020-Oct-04.23696954) 3.5364e-05 TDB period 1329.115988963581 3.64 5.2252e-06 1.431e-08 d yr n .2708567220538224 1.0648e-09 deg/d Q 2.783361456368191 7.2949e-09 au   Orbit Determination Parameters    # obs. used (total)      2257      data-arc span      14679 days (40.19 yr)      first obs. used      1980-04-08      last obs. used      2020-06-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50715      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 17:14:06   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 ] 2020-Oct-21 05:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin