+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2206900788869595 5.8241e-08   a 2.738735577476251 2.1462e-08 au q 2.134323806832495 1.6065e-07 au i 10.57670718790146 6.4349e-06 deg node 141.4499880689404 2.394e-05 deg peri 187.3030273904665 2.5765e-05 deg M 269.2195702158105 9.1361e-06 deg tp 2459617.958507317401 (2022-Feb-07.45850732) 4.3428e-05 TDB period 1655.478642164771 4.53 1.9459e-05 5.328e-08 d yr n .21745976712164 2.5562e-09 deg/d Q 3.343147348120008 2.6198e-08 au   Orbit Determination Parameters    # obs. used (total)      565      data-arc span      7825 days (21.42 yr)      first obs. used      1999-09-08      last obs. used      2021-02-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52749      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 20:01:37   Additional Information  Earth MOID = 1.12144 au   Jupiter MOID = 2.02055 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 15.42   n/a E2021B55   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 ] 2021-Apr-21 07:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin