+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   305291 (2008 AH5) Classification: Main-belt Asteroid          SPK-ID: 2305291 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06291518362999009 8.9532e-08   a 3.120164048460698 3.9677e-08 au q 2.9238583543961 2.8719e-07 au i 7.876049178165781 7.4996e-06 deg node 309.498071868661 4.9943e-05 deg peri 199.416488436038 8.4366e-05 deg M 72.39911671980921 6.4299e-05 deg tp 2458595.648887922519 (2019-Apr-22.14888792) 0.00035845 TDB period 2013.096387790811 5.51 3.8398e-05 1.051e-07 d yr n .1788289930791973 3.411e-09 deg/d Q 3.316469742525296 4.2173e-08 au   Orbit Determination Parameters    # obs. used (total)      214      data-arc span      13931 days (38.14 yr)      first obs. used      1981-03-07      last obs. used      2019-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54543      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 17:53:28   Additional Information  Earth MOID = 1.937 au   Jupiter MOID = 1.717 au   T_jup = 3.199  [ hide covariance matrix ] Orbital Elements at Epoch 2457224.5 (2015-Jul-21.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06410734804635074 8.8994e-08   q 2.920805163140725 2.8607e-07 au tp 2456577.567188955226 (2013-Oct-12.06718896) 0.00035042 TDB node 309.5260021035128 4.9939e-05 deg peri 198.7419287209436 8.3634e-05 deg i 7.876273302722518 7.4997e-06 deg   Orbit Determination Parameters    # obs. used (total)      214      data-arc span      13931 days (38.14 yr)      first obs. used      1981-03-07      last obs. used      2019-04-28      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54543      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 17:53:28   Additional Information  Jupiter MOID = 1.717 au   T_jup = 3.199  Orbit Covariance (6×6)   e q tp node peri i e 7.919855432517612E-15 -2.52444556167112E-14 1.398410859331482E-11 2.179800549612789E-14 2.860633242575312E-12 -1.836211464690033E-15 q -2.52444556167112E-14 8.18343768821745E-14 -4.333810647018516E-11 -5.841667282743751E-14 -8.808662510213548E-12 7.20574579642727E-15 tp 1.398410859331482E-11 -4.333810647018516E-11 1.227932639898205E-7 1.444843001973508E-10 2.354677091634236E-8 2.74470849187907E-11 node 2.179800549612789E-14 -5.841667282743751E-14 1.444843001973508E-10 2.493900464299894E-9 -2.440831687094407E-9 8.153545702945521E-11 peri 2.860633242575312E-12 -8.808662510213548E-12 2.354677091634236E-8 -2.440831687094407E-9 6.99459432516848E-9 -7.567683414204353E-11 i -1.836211464690033E-15 7.20574579642727E-15 2.74470849187907E-11 8.153545702945521E-11 -7.567683414204353E-11 5.624500053641968E-11 [ 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 15.5   n/a MPO471205   305291 (2008 AH5)          Discovered 2008-Jan-09 by LUSS at Lulin Reference: 20111110/Numbers.arc Last Updated: 2011-11-14 [ show close-approach data ] Alternate Designations  2008 AH5 = 1981 EZ36  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-08 03:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin