+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   120463 (1991 GQ4) Classification: Main-belt Asteroid          SPK-ID: 2120463 [ 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 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1379590487118096 3.1954e-08   a 2.160824943372632 7.4209e-09 au q 1.862719589752194 6.7928e-08 au i 1.677800955674706 3.5952e-06 deg node 219.559284865645 0.00016142 deg peri .9013235988114889 0.00016238 deg M 109.3702966206685 1.915e-05 deg tp 2458848.027943229816 (2019-Dec-30.52794323) 6.1039e-05 TDB period 1160.186489000404 3.18 5.9766e-06 1.636e-08 d yr n .3102949425916602 1.5985e-09 deg/d Q 2.458930296993071 8.4446e-09 au   Orbit Determination Parameters    # obs. used (total)      681      data-arc span      10833 days (29.66 yr)      first obs. used      1991-04-08      last obs. used      2020-12-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54239      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 09:25:04   Additional Information  Earth MOID = .853414 au   Jupiter MOID = 2.51264 au   T_jup = 3.684  [ 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 16.57   n/a E2021B55   diameter diameter 2.596 km 0.074 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.046   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   120463 (1991 GQ4)          Discovered 1991-Apr-08 by Elst, E. W. at La Silla Reference: 20060314/Numbers.arc Last Updated: 2006-03-23 [ show close-approach data ] Alternate Designations  1991 GQ4 = 2001 QU35  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-28 17:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin