+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .144620631859303 3.5694e-08   a 3.111704812950328 1.5688e-08 au q 2.661688096741817 1.1377e-07 au i 4.934114850733553 4.0625e-06 deg node 4.539566610210986 4.4002e-05 deg peri 101.9335606314882 4.6696e-05 deg M 355.3772733235027 1.405e-05 deg tp 2459226.244930845438 (2021-Jan-11.74493085) 7.8269e-05 TDB period 2004.915227084152 5.49 1.5162e-05 4.151e-08 d yr n .1795587140726972 1.3579e-09 deg/d Q 3.561721529158838 1.7957e-08 au   Orbit Determination Parameters    # obs. used (total)      1444      data-arc span      16069 days (43.99 yr)      first obs. used      1977-01-20      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47661      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:40:42   Additional Information  Earth MOID = 1.68387 au   Jupiter MOID = 1.58674 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 14.02   n/a E2021B10   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-Apr-11 15:27 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin