+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18986 (2000 RF22) Classification: Main-belt Asteroid          SPK-ID: 2018986 [ 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 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2072787436078454 3.7457e-08   a 2.679189538446887 1.0314e-08 au q 2.123850497030333 1.0224e-07 au i 3.737886841033746 3.4591e-06 deg node 232.4822870027641 5.6038e-05 deg peri 303.4076330503087 5.681e-05 deg M 48.91863440945597 7.4849e-06 deg tp 2458982.841611630935 (2020-May-13.34161163) 3.3382e-05 TDB period 1601.782649061787 4.39 9.2497e-06 2.532e-08 d yr n .224749593966986 1.2978e-09 deg/d Q 3.23452857986344 1.2452e-08 au   Orbit Determination Parameters    # obs. used (total)      1922      data-arc span      10067 days (27.56 yr)      first obs. used      1992-11-23      last obs. used      2020-06-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47387      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:43:41   Additional Information  Earth MOID = 1.13052 au   Jupiter MOID = 1.75211 au   T_jup = 3.343  [ 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 14.31   n/a E2021B10   diameter diameter 10.726 km 2.936 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)   geometric albedo albedo 0.036   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)   18986 (2000 RF22)          Discovered 2000-Sep-01 by LINEAR at Socorro Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2000 RF22 = 1992 WG7 = 1994 GS9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 10:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin