+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2826250932084647 3.0579e-08   a 2.279936802601115 8.391e-09 au q 1.635569451256565 6.794e-08 au i 6.16704608852698 3.4677e-06 deg node 109.391510284653 4.8302e-05 deg peri 199.3378119452577 4.9416e-05 deg M 174.4570185641055 1.2877e-05 deg tp 2458591.147516097082 (2019-Apr-17.64751610) 4.2764e-05 TDB period 1257.426591435428 3.44 6.9417e-06 1.901e-08 d yr n .2862990193240931 1.5805e-09 deg/d Q 2.924304153945664 1.0762e-08 au   Orbit Determination Parameters    # obs. used (total)      693      data-arc span      8249 days (22.58 yr)      first obs. used      1998-06-24      last obs. used      2021-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57323      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 09:24:48   Additional Information  Earth MOID = .620312 au   Jupiter MOID = 2.35355 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 ] 2021-Mar-03 19:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin