+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74132 (1998 QN71) Classification: Main-belt Asteroid          SPK-ID: 2074132 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1818407618293388 3.6299e-08   a 2.320956591186627 8.4187e-09 au q 1.898912076472425 8.1577e-08 au i 6.039132547263265 3.9954e-06 deg node 256.8342885931763 3.4648e-05 deg peri 345.9710397535137 3.6245e-05 deg M 186.2964939820679 1.1876e-05 deg tp 2459823.667846907363 (2022-Sep-01.16784691) 4.4246e-05 TDB period 1291.513510749121 3.54 7.027e-06 1.924e-08 d yr n .2787427285922761 1.5166e-09 deg/d Q 2.743001105900828 9.9496e-09 au   Orbit Determination Parameters    # obs. used (total)      865      data-arc span      8197 days (22.44 yr)      first obs. used      1998-08-24      last obs. used      2021-02-01      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53401      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 13:11:13   Additional Information  Earth MOID = .884992 au   Jupiter MOID = 2.28364 au   T_jup = 3.548  [ 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 15.7   n/a MPO337816   74132 (1998 QN71)          Discovered 1998-Aug-24 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ 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-Jan-10 19:13 00:01 Iris 0.031016809667069 0.0310019400616405 0.0310316880593014 8.29226957447736 8.29226955212608 2416125.300777952 1.07790530319189 1109.38867922042 50.829329135123 -48.1158992181718 68009.6239425629 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 13:11:17 2021-Apr-13 13:11 1977-Sep-25 03:03 00:07 Thisb 0.040936658248003 0.0409351991893569 0.0409381174169403 2.16628160080689 2.16628152392086 2443411.627344956 7.27716798181716 162.107903139374 49.6725229507592 69.9371442228595 116309.528878688 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 13:11:17 2021-Apr-13 13:11 1986-Jan-14 11:36 < 00:01 David 0.00959940295681066 0.00959532918970948 0.00960347674611616 7.91854841233142 7.91854821358779 2446444.983012320 0.423650272523136 204.433639209905 33.4741771948319 -6.64395186234796 8557.92329150962 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 13:11:17 2021-Apr-13 13:11 2057-Jan-15 02:17 < 00:01 Hebe 0.0397675279054208 0.0397604588236447 0.0397745978807801 8.91673914025352 8.91673912272187 2472378.594863039 0.544249552421089 462.747210607014 46.3352334216966 -40.631054328014 84162.6786959844 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 13:11:17 2021-Apr-13 13:11 2129-Aug-20 06:18 00:12 Thisb 0.0427932463333534 0.0427825181628774 0.0428039804627557 2.53652969527353 2.53652963245908 2498892.762843750 11.9704902100293 962.078074213303 56.5089014875907 -56.3852882771331 94284.9238502257 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 13:11:17 2021-Apr-13 13:11 Alternate Designations  1998 QN71 = 1999 YJ12  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-17 21:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin