+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23854 Rickschaffer (1998 RD40) Classification: Main-belt Asteroid          SPK-ID: 2023854 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO236514 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1665491 n/a   a 2.3793196 n/a AU q 1.9830461 n/a AU i 4.44586 n/a deg node 96.17984 n/a deg peri 169.33469 n/a deg M 56.78221 n/a deg tp 2456189.0598815 (2012-Sep-18.55988150) n/a JED period 1340.5332880 3.67 n/a n/a d yr n 0.26854984 n/a deg/d Q 2.7755931 n/a AU   Orbit Determination Parameters    # obs. used (total)      613      first obs. used      1994-??-??      last obs. used      2012-08-27      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.59      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.516  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.2 mag n/a PDS3 (MPO 11219)   23854 Rickschaffer           Discovered 1998 Sept. 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Rick Schinco Schaffer (b. 1992) is a finalist in the 2007 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his botany and zoology project. He attends the James Weldon Johnson Middle School, Jacksonville, Florida. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20071026/MPCPages.arc Last Updated: 2007-10-28 Alternate Designations  1998 RD40 = 1994 NV11  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 09:38 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin