+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1769907336591901 2.5386e-08   a 2.366268841532183 6.3e-09 au q 1.94746118323452 6.1435e-08 au i .9439516795931704 2.9198e-06 deg node 57.41822464086498 0.0001913 deg peri 199.8347440109046 0.00019152 deg M 73.09900409609249 9.5846e-06 deg tp 2459126.537454884695 (2020-Oct-04.03745488) 3.5077e-05 TDB period 1329.519019352892 3.64 5.3096e-06 1.454e-08 d yr n .2707746145483654 1.0814e-09 deg/d Q 2.785076499829846 7.415e-09 au   Orbit Determination Parameters    # obs. used (total)      2350      data-arc span      15049 days (41.20 yr)      first obs. used      1980-04-08      last obs. used      2021-06-21      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50592      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 16:32:25   Additional Information  Earth MOID = .93254 au   Jupiter MOID = 2.26743 au   T_jup = 3.526  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.32   n/a E2021B10   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 Alternate Designations  1994 AR2 = 1980 GY1 = 1997 CQ14  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 13:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin