+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06387916643350858 3.4374e-08   a 2.23301833259874 6.6024e-09 au q 2.09037498288159 7.8049e-08 au i 3.697897489752667 3.7131e-06 deg node 194.5544191004711 5.1055e-05 deg peri 356.9082724024539 5.7494e-05 deg M 338.4189078102164 2.6808e-05 deg tp 2459469.564729180050 (2021-Sep-12.06472918) 9.081e-05 TDB period 1218.812387876722 3.34 5.4055e-06 1.48e-08 d yr n .2953694954045811 1.31e-09 deg/d Q 2.375661682315891 7.0241e-09 au   Orbit Determination Parameters    # obs. used (total)      1238      data-arc span      16237 days (44.45 yr)      first obs. used      1976-10-22      last obs. used      2021-04-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .54465      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:32:51   Additional Information  Earth MOID = 1.09045 au   Jupiter MOID = 2.57843 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 15.54   n/a MPCxxxxx   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-Jul-31 05:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin