+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101948 (1999 RT26) Classification: Main-belt Asteroid          SPK-ID: 2101948 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1872179663412809 3.3757e-08   a 2.444807019512025 1.1015e-08 au q 1.987095221222096 8.5241e-08 au i 2.43360813413968 5.3089e-06 deg node 90.8787189865526 0.0001077 deg peri 283.5479006603971 0.00010914 deg M 137.4408722352417 1.8639e-05 deg tp 2458467.436796993738 (2018-Dec-14.93679699) 7.0366e-05 TDB period 1396.256804553718 3.82 9.4359e-06 2.583e-08 d yr n .2578322260102187 1.7424e-09 deg/d Q 2.902518817801955 1.3077e-08 au   Orbit Determination Parameters    # obs. used (total)      542      data-arc span      7534 days (20.63 yr)      first obs. used      1999-09-05      last obs. used      2020-04-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55072      source      ORB      producer      Otto Matic      solution date      2020-May-20 18:04:13   Additional Information  Earth MOID = .989689 au   Jupiter MOID = 2.56136 au   T_jup = 3.474  [ hide covariance matrix ] Orbital Elements at Epoch 2457261.5 (2015-Aug-27.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1866424856493388 3.4302e-08   q 1.988440506392098 8.6772e-08 au tp 2457067.602958389384 (2015-Feb-14.10295839) 6.6075e-05 TDB node 90.96497581231959 0.0001079 deg peri 282.8348377631758 0.00010934 deg i 2.433226163137158 5.3081e-06 deg   Orbit Determination Parameters    # obs. used (total)      542      data-arc span      7534 days (20.63 yr)      first obs. used      1999-09-05      last obs. used      2020-04-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55072      source      ORB      producer      Otto Matic      solution date      2020-May-20 18:04:13   Additional Information  Jupiter MOID = 2.56136 au   T_jup = 3.474  Orbit Covariance (6×6)   e q tp node peri i e 1.176607070967942E-15 -2.961384661033661E-15 -1.367227338288063E-12 4.196144225887407E-15 -3.711624122473209E-13 -7.652605380889564E-16 q -2.961384661033661E-15 7.52939871745664E-15 3.604044906624225E-12 -8.821724791262382E-15 9.764975456577589E-13 2.149406083507635E-15 tp -1.367227338288063E-12 3.604044906624225E-12 4.365872111684133E-9 -1.399568407856911E-11 1.196049066428823E-9 1.869764263835832E-12 node 4.196144225887407E-15 -8.821724791262382E-15 -1.399568407856911E-11 1.164210661832287E-8 -1.163506980648189E-8 3.615771345000596E-10 peri -3.711624122473209E-13 9.764975456577589E-13 1.196049066428823E-9 -1.163506980648189E-8 1.195558370856581E-8 -3.607478668579572E-10 i -7.652605380889564E-16 2.149406083507635E-15 1.869764263835832E-12 3.615771345000596E-10 -3.607478668579572E-10 2.81759882510083E-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 16.4   n/a MPO417515   101948 (1999 RT26)          Discovered 1999-Sep-07 by LINEAR at Socorro Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-22 16:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin