+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100031 (1991 FM2) Classification: Main-belt Asteroid          SPK-ID: 2100031 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3892458507505943 4.5458e-08   a 3.077660567768188 2.3137e-08 au q 1.879693961745703 1.3676e-07 au i 22.00796796181272 7.5215e-06 deg node 171.0355434425838 1.5288e-05 deg peri 312.3609771087403 1.8345e-05 deg M 214.7324533761313 1.166e-05 deg tp 2459996.284742780381 (2023-Feb-20.78474278) 7.0151e-05 TDB period 1972.102606941567 5.40 2.2238e-05 6.088e-08 d yr n .1825462826999177 2.0585e-09 deg/d Q 4.275627173790673 3.2142e-08 au   Orbit Determination Parameters    # obs. used (total)      459      data-arc span      10803 days (29.58 yr)      first obs. used      1991-02-10      last obs. used      2020-09-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55755      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:08:28   Additional Information  Earth MOID = .952465 au   Jupiter MOID = 1.21388 au   T_jup = 3.004  [ 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 14.98   n/a E2021B55   100031 (1991 FM2)          Discovered 1991-Mar-20 by Debehogne, H. at La Silla Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1903-Feb-22 02:25 00:02 Jupiter 1.25589385327463 1.25589256314814 1.25589514341474 5.71646620478113 5.59724127644348 2416167.600489148 1.77798230063657 360.423421607671 49.965126128432 -84.6334801342637 1641112.63184938 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 20:08:29 2020-Nov-12 20:08 1962-Apr-10 08:35 < 00:01 Jupiter 1.35321352822258 1.35321171406568 1.35321534238324 6.29145359075147 6.19116467631387 2437764.857426688 0.785960906985097 179.410952242358 59.5559989682879 -67.6699056634202 1595568.61642111 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 20:08:29 2020-Nov-12 20:08 2010-Sep-09 06:14 < 00:01 Jupiter 1.70862566376311 1.70862425393511 1.70862707361131 5.08097703371709 4.9824553345796 2455448.759521634 0.692652649797968 319.355966493336 20.8742116863294 77.8973974819832 2439102.27409094 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 20:08:29 2020-Nov-12 20:08 2021-Mar-28 05:18 < 00:01 Jupiter 1.83402949588132 1.83402810094927 1.83403089081338 7.65681594232076 7.59625937905902 2459301.720626181 0.539662872620561 85.6859292905555 62.1462341679549 -60.4763274679942 1993567.78866595 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 20:08:29 2020-Nov-12 20:08 2069-Jul-21 06:59 00:01 Jupiter 1.29883975727482 1.29883811500009 1.29884139956499 5.27930769382511 5.15430054465243 2476948.791054070 1.24020487848302 243.206310804964 13.7073815909866 70.7145254689579 2661278.23617787 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 20:08:29 2020-Nov-12 20:08 2128-Sep-18 03:14 00:02 Jupiter 1.19734689441266 1.19734522083265 1.19734856804434 5.50039703625785 5.37024536502869 2498556.634972824 2.45393852160918 450.471129248614 34.8030421830002 80.0387355911765 1877571.49225654 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 20:08:29 2020-Nov-12 20:08 2187-Dec-28 14:38 00:06 Jupiter 1.17091329487447 1.17091041159211 1.17091617860424 5.59431300484715 5.46347559722713 2520207.109461744 6.20215480235838 1212.82538689923 38.548945215503 83.0415776983041 1812087.44525163 T 15 CATAB v2.0f-lin.ifort 2020-Nov-12 20:08:29 2020-Nov-12 20:08 Alternate Designations  1991 FM2 = 2002 JD37  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 07:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin