+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74662 (1999 RH93) Classification: Main-belt Asteroid          SPK-ID: 2074662 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2371851187824866 3.9237e-08   a 2.580783698086141 9.0757e-09 au q 1.968660210103675 9.9582e-08 au i 4.343018886990876 5.9758e-06 deg node 23.2345744923102 5.9889e-05 deg peri 326.6175839217225 6.1578e-05 deg M 3.909144906593412 1.4361e-05 deg tp 2458984.056089450125 (2020-May-14.55608945) 6.0363e-05 TDB period 1514.348518513694 4.15 7.9882e-06 2.187e-08 d yr n .2377259894923882 1.254e-09 deg/d Q 3.192907186068607 1.1228e-08 au   Orbit Determination Parameters    # obs. used (total)      489      data-arc span      9131 days (25.00 yr)      first obs. used      1995-11-16      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54713      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:01:00   Additional Information  Earth MOID = .964584 au   Jupiter MOID = 2.24254 au   T_jup = 3.381  [ hide covariance matrix ] Orbital Elements at Epoch 2457542.5 (2016-Jun-03.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2387997855108936 3.9449e-08   q 1.96418783555404 1.0037e-07 au tp 2457470.922186082780 (2016-Mar-23.42218608) 5.6338e-05 TDB node 23.29389625790177 5.9783e-05 deg peri 326.8193466507417 6.1452e-05 deg i 4.348398423434021 5.9816e-06 deg   Orbit Determination Parameters    # obs. used (total)      489      data-arc span      9131 days (25.00 yr)      first obs. used      1995-11-16      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54713      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:01:00   Additional Information  Jupiter MOID = 2.24254 au   T_jup = 3.381  Orbit Covariance (6×6)   e q tp node peri i e 1.556248957579214E-15 -3.951222142972047E-15 1.060200514752745E-12 -1.395541090243135E-14 2.81511611040344E-13 1.344872440585741E-15 q -3.951222142972047E-15 1.007469817351639E-14 -2.590614635762333E-12 3.41772929370247E-14 -6.897137148880098E-13 -3.076355270061097E-15 tp 1.060200514752745E-12 -2.590614635762333E-12 3.173955916735716E-9 -3.453573345680206E-11 8.225107686626618E-10 1.990326018150868E-12 node -1.395541090243135E-14 3.41772929370247E-14 -3.453573345680206E-11 3.573957805734592E-9 -3.571340337404815E-9 1.413116967239746E-10 peri 2.81511611040344E-13 -6.897137148880098E-13 8.225107686626618E-10 -3.571340337404815E-9 3.776338330523178E-9 -1.404025412060281E-10 i 1.344872440585741E-15 -3.076355270061097E-15 1.990326018150868E-12 1.413116967239746E-10 -1.404025412060281E-10 3.577987882187253E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.6   n/a MPO436305   74662 (1999 RH93)          Discovered 1999-Sep-07 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1999 RH93 = 1995 WD10  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-27 11:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin