+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   39P/Oterma Classification: Chiron-type Comet          SPK-ID: 1000177 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] alternate orbits: [epoch=2001-10-18.0] 14 (default) [epoch=1958-06-06.0] SAO/1958 [epoch=1950-07-18.0] SAO/1950 [epoch=1942-08-29.0] SAO/1942 Orbital Elements at Epoch 2452200.5 (2001-Oct-18.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.245513956937926 7.3662e-08   a 7.25148931544269 4.3077e-07 AU q 5.47114747991526 7.3304e-07 AU i 1.94283105545965 1.7398e-05 deg node 331.5811183554936 0.00059054 deg peri 56.27834376123234 0.00069798 deg M 338.345849678193 0.00017526 deg tp 2452629.520347695068 (2002-Dec-21.02034770) 0.0035075 JED period 7132.458345164751 19.53 0.00063555 1.74e-06 d yr n .05047348089232821 4.4975e-09 deg/d Q 9.031831150970113 5.3653e-07 AU   Orbit Determination Parameters    # obs. used (total)      237      data-arc span      21764 days (59.59 yr)      first obs. used      1942-02-17      last obs. used      2001-09-19      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      1.1036      data source      ORB      producer      M.S.W. Keesey      solution date      2002-Nov-26 14:10:36   Additional Information  Earth MOID = 4.47591 AU   T_jup = 3.005  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes comet total magnitude M1 5. mag n/a ICQ 2003 Handbook   comet total magnitude slope K1 15.0   n/a ICQ 2003 Handbook   comet nuclear magnitude M2 10. mag n/a ICQ 2003 Handbook   comet nuclear magnitude slope K2 10.0   n/a ICQ 2003 Handbook   39P/Oterma          Discovered 1943-Apr-08 by Oterma, Liisi at Turku, Finland discovered on plate/photo taken on discovery date Reference: comet.dis Last Updated: 2003-08-29 [ 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-Mar-27 19:58 14:57 Jupiter 1.44145647095763 1.4403104646667 1.44260317979793 1.42805609187043 0.929576616653917 2416201.33241 897.675281935299 1355.01420679645 60.124553496451 43.894281861589 58595.2410331047 T 14 CATAB v2.0a-linF95 2006-Mar-28 13:00:40 2006-Mar-28 13:00 1937-Oct-27 21:16 00:05 Jupiter 0.164874052668042 0.164870605595478 0.164877499750823 2.75378299905567 n/a 2428834.3866 5.6438776939004 186.993601901228 81.932813372417 25.975105050882 176627.621515631 F 14 CATAB v2.0a-linF95 2006-Mar-28 13:00:40 2006-Mar-28 13:00 1963-Apr-12 07:27 00:01 Jupiter 0.0951399780334453 0.0951388168293242 0.0951411392401524 3.83071846084762 n/a 2438131.81045 1.92088751507932 67.6488654558457 40.9422350017611 -40.504217899266 275160.558523825 F 14 CATAB v2.0a-linF95 2006-Mar-28 13:00:40 2006-Mar-28 13:00 2011-Jun-03 01:13 00:12 Saturn 1.0146852185168 1.01466605600175 1.01470438144628 1.18705452080877 0.953522230544858 2455715.55108 12.6605369724631 86.6688639017691 8.67127930561508 34.1814275283431 326181.96515605 T 14 CATAB v2.0a-linF95 2006-Mar-28 13:00:40 2006-Mar-28 13:00 2025-Jan-15 12:22 00:17 Jupiter 0.888781199145822 0.888753351567332 0.888809046739165 0.671527051319409 n/a 2460691.01533 17.6469105606194 1793.20125368052 1370.82412574596 -78.9401626075129 96195.9363516636 F 14 CATAB v2.0a-linF95 2006-Mar-28 13:00:40 2006-Mar-28 13:00 2155-Feb-21 11:15 00:40 Jupiter 0.771236445704015 0.771232135111681 0.77124077122747 0.652902562999526 n/a 2508208.96912 40.5930192012341 8897.02800151122 171.995142743493 89.1655791510616 670317.765468128 F 14 CATAB v2.0a-linF95 2006-Mar-28 13:00:40 2006-Mar-28 13:00 2168-Oct-01 18:06 2_15:36 Saturn 1.93285142797707 1.93167295861046 1.93403013709957 0.798743544847769 0.612831941496634 2513180.25427 3816.77119588319 1227.26335248163 137.073801921676 31.146412407153 24586.5301922571 T 14 CATAB v2.0a-linF95 2006-Mar-28 13:00:40 2006-Mar-28 13:00 Alternate Designations  Perihelion  Year (est.)  New-Style  Desig Roman  Numeral  Year/  Letter   2003.0   39P/2001 P3         1963.9       1958 IV     1944.4   39P/1943 G1   1942 VII    [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2013-Jun-18 22:11 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin