+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   285250 (1998 DH8) Classification: Main-belt Asteroid          SPK-ID: 2285250 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO258091 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1763047 n/a   a 2.4133565 n/a AU q 1.9878704 n/a AU i 4.33083 n/a deg node 319.36911 n/a deg peri 255.61696 n/a deg M 331.58569 n/a deg tp 2456508.5849589 (2013-Aug-04.08495890) n/a JED period 1369.4010232 3.75 n/a n/a d yr n 0.26288866 n/a deg/d Q 2.8388426 n/a AU   Orbit Determination Parameters    # obs. used (total)      82      first obs. used      1998-??-??      last obs. used      2013-03-15      # oppositions      7      planetary ephem.      DE403      condition code      0      fit RMS      0.48      data source      MPC:mpu      producer      MPCLINUX   Additional Information  T_jup = 3.493  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 17.5 mag n/a MPO258091   285250 (1998 DH8)          Discovered 1998-Feb-21 by Beijing Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20110912/Numbers.arc Last Updated: 2011-09-14 Alternate Designations  1998 DH8 = 2009 BK115  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 15:03 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin