+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   6830 Johnbackus (1991 JB1) Classification: Main-belt Asteroid          SPK-ID: 2006830 [ 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 .1399560377155901 7.4939e-08   a 3.171057393917008 3.5865e-08 AU q 2.727248765695659 2.4879e-07 AU i 5.085686381257529 6.8566e-06 deg node 79.14499129305345 7.8668e-05 deg peri 153.8152456780927 8.345e-05 deg M 301.0181586064572 3.2965e-05 deg tp 2456738.425065656365 (2014-Mar-21.92506566) 0.00019127 JED period 2062.550452173739 5.65 3.4992e-05 9.58e-08 d yr n .1745411849783326 2.9611e-09 deg/d Q 3.614866022138358 4.0885e-08 AU   Orbit Determination Parameters    # obs. used (total)      986      data-arc span      28857 days (79.01 yr)      first obs. used      1934-04-06      last obs. used      2013-04-08      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .53914      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:23:31   Additional Information  Earth MOID = 1.71755 AU   T_jup = 3.181  [ 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 12.4 mag n/a PDS3 (MPC 28116)   6830 Johnbackus           Discovered 1991 May 5 by S. Otomo and O. Muramatsu at Kiyosato. John Backus (1924-2007) was a U.S. computer scientist, best known for inventing the first high-level programming language FORTRAN in 1954. The language was widely adopted by scientists and engineers for numerical calculations and is still very widely used. The name was suggested by E. Goffin. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20070601/MPCPages.arc Last Updated: 2007-06-06 [ show close-approach data ] Alternate Designations  1991 JB1 = 1934 GK = 1968 HN1 = 1985 GN = 1987 SO10  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-May-26 08:41 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin