+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   134513 (1999 JN42) Classification: Main-belt Asteroid          SPK-ID: 2134513 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1147550799040119 5.1589e-08   a 3.095717863572657 1.9721e-08 au q 2.7404685127781 1.6453e-07 au i 1.155802915726323 4.7027e-06 deg node 46.04863441030144 0.00021599 deg peri 153.1998223133597 0.00021664 deg M 13.59986578823504 1.7583e-05 deg tp 2459125.342451034112 (2020-Oct-02.84245103) 9.6935e-05 TDB period 1989.484164698596 5.45 1.9011e-05 5.205e-08 d yr n .1809514277056533 1.7291e-09 deg/d Q 3.450967214367215 2.1984e-08 au   Orbit Determination Parameters    # obs. used (total)      765      data-arc span      7702 days (21.09 yr)      first obs. used      1999-05-10      last obs. used      2020-06-10      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57821      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 16:08:39   Additional Information  Earth MOID = 1.73739 au   Jupiter MOID = 1.50453 au   T_jup = 3.213  [ 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 14.96   n/a E2021B55   diameter diameter 5.872 km 0.190 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.062   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   134513 (1999 JN42)          Discovered 1999-May-10 by LINEAR at Socorro Reference: 20060907/Numbers.arc Last Updated: 2006-09-10 [ show close-approach data ] Alternate Designations  1999 JN42 = 2004 ES42  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 19:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin