+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   9952 (1991 AK) Classification: Main-belt Asteroid          SPK-ID: 2009952 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04297042732481672 6.5302e-08   a 2.654768883263528 2.171e-08 AU q 2.540692329901068 1.7181e-07 AU i 1.930184574199986 7.3188e-06 deg node 332.7311575353283 0.00017832 deg peri 158.9874575654632 0.00019615 deg M 39.9515740246064 8.3789e-05 deg tp 2456225.164482919901 (2012-Oct-24.66448292) 0.00036754 JED period 1579.932397906508 4.33 1.9381e-05 5.306e-08 d yr n .2278578504225995 2.7951e-09 deg/d Q 2.768845436625988 2.2643e-08 AU   Orbit Determination Parameters    # obs. used (total)      1174      data-arc span      13337 days (36.51 yr)      first obs. used      1976-09-24      last obs. used      2013-03-31      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .50001      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:37:52   Additional Information  Earth MOID = 1.5547 AU   T_jup = 3.386  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.8 mag n/a PDS3 (MPC 33660)   9952 (1991 AK)          Discovered 1991-Jan-09 by Arai, M., Mori, H. at Yorii (875) Reference: 19990202/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 AK = 1976 SV2 = 1989 SY6  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 19:27 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin