+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   85969 (1999 GP2) Classification: Main-belt Asteroid          SPK-ID: 2085969 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1487975484127712 4.3781e-08   a 3.108627630331855 2.135e-08 au q 2.646071460010273 1.3632e-07 au i 5.812285054582994 4.9651e-06 deg node 147.608977346716 3.7064e-05 deg peri 183.1460830665211 3.9102e-05 deg M 188.3798929539079 1.2796e-05 deg tp 2459954.870812502315 (2023-Jan-10.37081250) 7.4686e-05 TDB period 2001.941954322169 5.48 2.0624e-05 5.647e-08 d yr n .1798253936497831 1.8526e-09 deg/d Q 3.571183800653438 2.4527e-08 au   Orbit Determination Parameters    # obs. used (total)      735      data-arc span      7991 days (21.88 yr)      first obs. used      1998-03-20      last obs. used      2020-02-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54148      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 20:42:04   Additional Information  Earth MOID = 1.63529 au   Jupiter MOID = 1.79048 au   T_jup = 3.195  [ 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 14.9   n/a MPO244837   diameter diameter 5.510 km 0.288 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.053   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   85969 (1999 GP2)          Discovered 1999-Apr-08 by Bickel, W. at Bergisch Gladbach Reference: 20040830/Numbers.arc Last Updated: 2004-09-06 [ show close-approach data ] Alternate Designations  1999 GP2 = 2001 SA66  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-03 15:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin