+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3412 Kafka (1983 AU2) Classification: Main-belt Asteroid          SPK-ID: 2003412 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1043803384445939 3.0464e-08   a 2.224411400676643 5.1934e-09 au q 1.992226585834002 6.808e-08 au i 2.973493060147512 3.0482e-06 deg node 307.5843327536118 6.9831e-05 deg peri 117.4239380152939 7.2009e-05 deg M 191.6816177575779 1.7414e-05 deg tp 2459767.065522812706 (2022-Jul-06.56552281) 5.9235e-05 TDB period 1211.772508119842 3.32 4.2437e-06 1.162e-08 d yr n .2970854657848011 1.0404e-09 deg/d Q 2.456596215519284 5.7355e-09 au   Orbit Determination Parameters    # obs. used (total)      2651      data-arc span      28355 days (77.63 yr)      first obs. used      1942-12-31      last obs. used      2020-08-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43964      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 04:00:30   Additional Information  Earth MOID = 1.00722 au   Jupiter MOID = 2.77506 au   T_jup = 3.638  [ 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 13.44   n/a E2021B10   diameter diameter 6.084 km 0.080 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   geometric albedo albedo 0.231   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   3412 Kafka (1983 AU2)          Discovered 1983-Jan-10 by Kirk, R. and Rudy, D. at Palomar Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] Alternate Designations  1983 AU2 = 1942 YB = 1977 FF3 = 1978 PA2 = 1978 QE1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-03 19:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin