+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   66193 (1999 AF22) Classification: Main-belt Asteroid          SPK-ID: 2066193 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ 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 .1667577705799199 1.0958e-07   a 2.632945110006922 4.5357e-08 AU q 2.193881053402865 3.0611e-07 AU i 4.817712157446146 8.6371e-06 deg node 241.4068634932653 9.1582e-05 deg peri 140.3792310731881 9.5999e-05 deg M 197.4148506289309 3.074e-05 deg tp 2457105.257178826512 (2015-Mar-23.75717883) 0.00014649 JED period 1560.49052056098 4.27 4.0323e-05 1.104e-07 d yr n .2306966913650868 5.9612e-09 deg/d Q 3.072009166610978 5.292e-08 AU   Orbit Determination Parameters    # obs. used (total)      517      data-arc span      8580 days (23.49 yr)      first obs. used      1989-10-23      last obs. used      2013-04-20      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .54768      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 16:54:43   Additional Information  Earth MOID = 1.1991 AU   T_jup = 3.374  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.641 mag .44336 1 autocmod 2.5c rotation period rot_per 8.00 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Warner, B.D (2011) Minor Planet Bul. 38, 25-31.] 66193 (1999 AF22)          Discovered 1999-Jan-13 by BAO Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20030910/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1999 AF22 = 1989 UO8 = 2002 YN12  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-18 08:25 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin