+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160503 (2007 HX17) Classification: Main-belt Asteroid          SPK-ID: 2160503 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2205317788709818 5.8395e-08   a 2.739207860492351 2.1563e-08 au q 2.135125478320596 1.6101e-07 au i 10.57636241897841 6.4543e-06 deg node 141.4479837414985 2.3951e-05 deg peri 187.2692833612055 2.5782e-05 deg M 225.7630742985249 9.0458e-06 deg tp 2459617.955135885488 (2022-Feb-07.45513589) 4.3518e-05 TDB period 1655.906880742376 4.53 1.9553e-05 5.353e-08 d yr n .2174035292604164 2.5671e-09 deg/d Q 3.343290242664105 2.6318e-08 au   Orbit Determination Parameters    # obs. used (total)      559      data-arc span      7528 days (20.61 yr)      first obs. used      1999-09-08      last obs. used      2020-04-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52748      source      ORB      producer      Otto Matic      solution date      2020-May-21 01:33:41   Additional Information  Earth MOID = 1.12417 au   Jupiter MOID = 2.02006 au   T_jup = 3.291  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.3   n/a MPO433026   160503 (2007 HX17)          Discovered 2007-Apr-16 by CSS at Catalina Reference: 20070730/Numbers.arc Last Updated: 2007-08-06 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-13 16:57 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin