+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18894 (2000 GF42) Classification: Main-belt Asteroid          SPK-ID: 2018894 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1447009471994263 3.5598e-08   a 3.111905768695617 1.5461e-08 au q 2.661610056370002 1.1333e-07 au i 4.934316428406074 3.9656e-06 deg node 4.535137564173609 4.376e-05 deg peri 101.8972139654022 4.6407e-05 deg M 30.59725942415022 1.3747e-05 deg tp 2459226.080961225870 (2021-Jan-11.58096123) 7.6473e-05 TDB period 2005.109448144335 5.49 1.4943e-05 4.091e-08 d yr n .1795413214641068 1.3381e-09 deg/d Q 3.562201481021232 1.7699e-08 au   Orbit Determination Parameters    # obs. used (total)      1513      data-arc span      16183 days (44.31 yr)      first obs. used      1977-01-20      last obs. used      2021-05-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46752      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:05:02   Additional Information  Earth MOID = 1.68423 au   Jupiter MOID = 1.58649 au   T_jup = 3.197  [ 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 14.03   n/a MPCxxxxx   diameter diameter 7.747 km 0.249 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.074   0.017 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18894 (2000 GF42)          Discovered 2000-Apr-05 by LINEAR at Socorro Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2000 GF42 = 1977 BB1 = 1981 UU9 = 1989 GP1 = 1994 CG15 = 1998 XX97  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Aug-03 13:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin