+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   118163 (1979 MJ8) Classification: Main-belt Asteroid          SPK-ID: 2118163 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2802049145346613 4.0737e-08   a 2.612464697423498 1.7647e-08 au q 1.880439250157127 1.1164e-07 au i 4.070734908522385 4.1393e-06 deg node 231.4742906593824 6.1923e-05 deg peri 159.63384441981 6.2597e-05 deg M 228.3455851312252 1.4455e-05 deg tp 2459764.536227302956 (2022-Jul-04.03622730) 6.6991e-05 TDB period 1542.318516484658 4.22 1.5627e-05 4.278e-08 d yr n .2334148207080681 2.365e-09 deg/d Q 3.344490144689868 2.2592e-08 au   Orbit Determination Parameters    # obs. used (total)      683      data-arc span      14975 days (41.00 yr)      first obs. used      1979-06-24      last obs. used      2020-06-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55192      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 18:13:35   Additional Information  Earth MOID = .885784 au   Jupiter MOID = 2.10738 au   T_jup = 3.349  [ 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 15.80   n/a E2021B55   diameter diameter 3.545 km 0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.089   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   118163 (1979 MJ8)          Discovered 1979-Jun-25 by Helin, E. F., Bus, S. J. at Siding Spring Reference: 20051116/Numbers.arc Last Updated: 2005-11-21 Alternate Designations  1979 MJ8 = 2002 AF87  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 05:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin