+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   311999 (2007 NS2) Classification: Mars-crossing Asteroid          SPK-ID: 2311999 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO224533 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0540248 n/a   a 1.5237155 n/a AU q 1.4413971 n/a AU i 18.62167 n/a deg node 282.49888 n/a deg peri 176.93881 n/a deg M 225.47063 n/a deg tp 2456657.2254100 (2013-Dec-30.72541000) n/a JED period 686.9960633 1.88 n/a n/a d yr n 0.52402047 n/a deg/d Q 1.6060339 n/a AU   Orbit Determination Parameters    # obs. used (total)      87      first obs. used      1998-??-??      last obs. used      2012-02-04      # oppositions      4      planetary ephem.      DE403      condition code      2      fit RMS      0.57      data source      MPC:mpu      producer      MPCLINUX   Additional Information  T_jup = 4.439  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 17.8 mag n/a MPO224533   311999 (2007 NS2)          Discovered 2007-Jul-14 by La Sagra at La Sagra (J75) Reference: 20120109/Numbers.arc Last Updated: 2012-01-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-20 03:03 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin