+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21391 Rotanner (1998 FY31) Classification: Main-belt Asteroid          SPK-ID: 2021391 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06396306557482574 3.5442e-08   a 2.233065913049748 6.7177e-09 au q 2.090232171620439 8.0106e-08 au i 3.69765925800441 3.8892e-06 deg node 194.5610847940214 5.136e-05 deg peri 356.9386906104817 5.7799e-05 deg M 280.5006413805473 2.693e-05 deg tp 2459469.660833433444 (2021-Sep-12.16083343) 9.1384e-05 TDB period 1218.851343189702 3.34 5.5e-06 1.506e-08 d yr n .2953600551958119 1.3328e-09 deg/d Q 2.375899654479057 7.1474e-09 au   Orbit Determination Parameters    # obs. used (total)      1186      data-arc span      16162 days (44.25 yr)      first obs. used      1976-10-22      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5545      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:52:21   Additional Information  Earth MOID = 1.08884 au   Jupiter MOID = 2.57915 au   T_jup = 3.635  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.5   n/a MPO337439   21391 Rotanner           Discovered 1998 Mar. 20 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Roberta Tanner (b. 1953), a 2004 Intel International Science and Engineering Fair Excellence in Teaching Award finalist, is a teacher at the Loveland High School, Longmont, Colorado, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20041226/MPCPages.arc Last Updated: 2004-12-25 Alternate Designations  1998 FY31 = 1976 UJ6 = 1999 RJ141  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-10 11:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin