+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   10028 Bonus (1981 JM2) Classification: Main-belt Asteroid          SPK-ID: 2010028 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO253434 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1763987 n/a   a 2.4320375 n/a AU q 2.0030292 n/a AU i 1.65030 n/a deg node 214.87119 n/a deg peri 67.15164 n/a deg M 115.40096 n/a deg tp 2455956.4204622 (2012-Jan-29.92046220) n/a JED period 1385.3319209 3.79 n/a n/a d yr n 0.25986552 n/a deg/d Q 2.8610458 n/a AU   Orbit Determination Parameters    # obs. used (total)      955      first obs. used      1978-??-??      last obs. used      2013-02-05      # oppositions      17      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.485  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.3 mag n/a PDS3 (MPC 33865)   10028 Bonus           Discovered 1981 May 5 by C. S. Shoemaker at Palomar. Shelley R. Bonus (b. 1947) has taken part in the organization and inventory of the Palomar Observatory's 1.2-m Schmidt Oschin Telescope plate archive. She has also devoted considerable time and energy to public outreach in astronomy through planetarium presentations and the Telescopes in Education program. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030318/MPCPages.arc Last Updated: 2003-10-02 Alternate Designations  1981 JM2 = 1978 UL5  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 03:28 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin