+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101155 (1998 RM74) Classification: Main-belt Asteroid          SPK-ID: 2101155 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1613416013352871 8.0199e-08   a 2.300692657650752 6.7717e-09 au q 1.929495220085042 1.8342e-07 au i 7.171627534237253 7.4724e-06 deg node 205.395953735815 2.368e-05 deg peri 157.0370281380135 2.7586e-05 deg M 81.21440959581142 1.332e-05 deg tp 2458712.947645940195 (2019-Aug-17.44764594) 4.694e-05 TDB period 1274.636458932884 3.49 5.6275e-06 1.541e-08 d yr n .2824334715024465 1.2469e-09 deg/d Q 2.671890095216462 7.8642e-09 au   Orbit Determination Parameters    # obs. used (total)      813      data-arc span      8088 days (22.14 yr)      first obs. used      1998-09-14      last obs. used      2020-11-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50667      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:28:25   Additional Information  Earth MOID = .929778 au   Jupiter MOID = 2.7995 au   T_jup = 3.564  [ hide covariance matrix ] Orbital Elements at Epoch 2457425.5 (2016-Feb-07.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1624674585059255 8.0476e-08   q 1.926565014706953 1.8424e-07 au tp 2457437.539745920586 (2016-Feb-19.03974592) 4.593e-05 TDB node 205.4180856619069 2.3663e-05 deg peri 156.7913420278661 2.7511e-05 deg i 7.174301349791916 7.477e-06 deg   Orbit Determination Parameters    # obs. used (total)      813      data-arc span      8088 days (22.14 yr)      first obs. used      1998-09-14      last obs. used      2020-11-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50667      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:28:25   Additional Information  Jupiter MOID = 2.7995 au   T_jup = 3.564  Orbit Covariance (6×6)   e q tp node peri i e 6.47644602935059E-15 -1.482005225081685E-14 2.115171860794732E-12 1.138763841681993E-14 4.724587003813298E-13 -1.680110350195238E-14 q -1.482005225081685E-14 3.394344238455223E-14 -4.857782572063299E-12 -2.612519412469576E-14 -1.087103490876618E-12 3.892644166766363E-14 tp 2.115171860794732E-12 -4.857782572063299E-12 2.109583502099376E-9 4.767919642725369E-12 6.375232463097137E-10 -8.898176521677748E-12 node 1.138763841681993E-14 -2.612519412469576E-14 4.767919642725369E-12 5.599390172617875E-10 -5.536192579650959E-10 4.706689911298129E-12 peri 4.724587003813298E-13 -1.087103490876618E-12 6.375232463097137E-10 -5.536192579650959E-10 7.568668092607817E-10 -7.083129152854945E-12 i -1.680110350195238E-14 3.892644166766363E-14 -8.898176521677748E-12 4.706689911298129E-12 -7.083129152854945E-12 5.590517846306259E-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 16.0   n/a MPO502725   101155 (1998 RM74)          Discovered 1998-Sep-14 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1998 RM74 = 2004 JP4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 03:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin