+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120352 Gordonwong (2005 JG177) Classification: Mars-crossing Asteroid          SPK-ID: 2120352 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ 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 .2826445620677435 3.0587e-08   a 2.279752429217667 8.4121e-09 au q 1.635392802238565 6.7946e-08 au i 6.167207889451733 3.5807e-06 deg node 109.3917510140705 5.6487e-05 deg peri 199.3107979877014 5.7715e-05 deg M 117.2364152000463 1.4064e-05 deg tp 2458591.060265296166 (2019-Apr-17.56026530) 4.7713e-05 TDB period 1257.274066610337 3.44 6.9589e-06 1.905e-08 d yr n .2863337513757641 1.5848e-09 deg/d Q 2.924112056196769 1.079e-08 au   Orbit Determination Parameters    # obs. used (total)      655      data-arc span      7886 days (21.59 yr)      first obs. used      1998-06-24      last obs. used      2020-01-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5712      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 06:18:28   Additional Information  Earth MOID = .622118 au   Jupiter MOID = 2.35387 au   T_jup = 3.545  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.2   n/a MPO338103   120352 Gordonwong           Discovered 2005 May 13 by the Catalina Sky Survey. Gordon H. Wong (b. 1969) is a software engineer who has shown great patience and dedicated support to the effort required in the design, build, test, and flight of the student-built Regolith X-ray Imaging Spectrometer aboard the OSIRIS-REx Asteroid Sample Return Mission. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2016-08-18 Last Updated: 2016-08-22 [ show close-approach data ] Alternate Designations  2005 JG177 = 1998 MU45  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 12:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin