+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .149013356502213 4.3136e-08   a 3.107921379429488 2.0921e-08 au q 2.644799582935712 1.3471e-07 au i 5.812832585465479 4.9081e-06 deg node 147.6109050235729 3.6467e-05 deg peri 183.2006411864246 3.8451e-05 deg M 224.2873849227979 1.2825e-05 deg tp 2459954.933876160632 (2023-Jan-10.43387616) 7.428e-05 TDB period 2001.259759553864 5.48 2.0207e-05 5.532e-08 d yr n .1798866930099339 1.8164e-09 deg/d Q 3.571043175923263 2.4039e-08 au   Orbit Determination Parameters    # obs. used (total)      759      data-arc span      8388 days (22.97 yr)      first obs. used      1998-03-20      last obs. used      2021-03-07      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54187      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 14:16:06   Additional Information  Earth MOID = 1.6321 au   Jupiter MOID = 1.79097 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 14.93   n/a E2021B10   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 ] 2021-Apr-22 11:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin