+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   78491 (2002 RQ61) Classification: Main-belt Asteroid          SPK-ID: 2078491 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09447865594629253 5.0646e-08   a 3.194964902470528 2.3641e-08 au q 2.893108912689534 1.6081e-07 au i 5.718644749439177 4.1238e-06 deg node 108.0623015758032 5.0242e-05 deg peri 243.2318555962376 5.4967e-05 deg M 86.66575599838191 2.1001e-05 deg tp 2458698.339447572073 (2019-Aug-02.83944757) 0.00012225 TDB period 2085.919597556261 5.71 2.3152e-05 6.339e-08 d yr n .1725857508706254 1.9155e-09 deg/d Q 3.496820892251521 2.5874e-08 au   Orbit Determination Parameters    # obs. used (total)      980      data-arc span      10694 days (29.28 yr)      first obs. used      1991-11-03      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55255      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 13:37:04   Additional Information  Earth MOID = 1.89108 au   Jupiter MOID = 1.9044 au   T_jup = 3.181  [ hide covariance matrix ] Orbital Elements at Epoch 2457121.5 (2015-Apr-09.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09721049817930551 5.2083e-08   q 2.881538396548761 1.659e-07 au tp 2456590.796205799463 (2013-Oct-25.29620580) 0.00011975 TDB node 108.4691848400974 5.02e-05 deg peri 239.3310084938784 5.4427e-05 deg i 5.723210465791661 4.1328e-06 deg   Orbit Determination Parameters    # obs. used (total)      980      data-arc span      10694 days (29.28 yr)      first obs. used      1991-11-03      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55255      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 13:37:04   Additional Information  Jupiter MOID = 1.9044 au   T_jup = 3.181  Orbit Covariance (6×6)   e q tp node peri i e 2.712666692315494E-15 -8.572093887591477E-15 -7.569798232434126E-14 6.288068657544632E-15 -1.01441088195823E-13 -1.820161127654898E-15 q -8.572093887591477E-15 2.75215656736613E-14 -3.858876859804969E-13 -1.836877035765947E-14 2.289738872218659E-13 6.943920142887011E-15 tp -7.569798232434126E-14 -3.858876859804969E-13 1.434110868846071E-8 -2.256509786310977E-11 2.55290703379949E-9 1.662968939124593E-14 node 6.288068657544632E-15 -1.836877035765947E-14 -2.256509786310977E-11 2.520013169245399E-9 -2.511129413219307E-9 4.045824314084358E-11 peri -1.01441088195823E-13 2.289738872218659E-13 2.55290703379949E-9 -2.511129413219307E-9 2.96227630289203E-9 -4.022648329960242E-11 i -1.820161127654898E-15 6.943920142887011E-15 1.662968939124593E-14 4.045824314084358E-11 -4.022648329960242E-11 1.708040543529924E-11 [ 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 14.3   n/a MPO453206   78491 (2002 RQ61)          Discovered 2002-Sep-05 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 23:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin