+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15049 (1998 XA90) Classification: Main-belt Asteroid          SPK-ID: 2015049 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1449960018463974 5.5911e-08   a 2.543692934995344 8.589e-09 au q 2.174867629496092 1.4218e-07 au i 12.2222551931569 6.0025e-06 deg node 219.9927336164897 1.2761e-05 deg peri 223.0206338352896 2.8998e-05 deg M 108.4164766330864 2.2571e-05 deg tp 2458554.239712381152 (2019-Mar-11.73971238) 9.2612e-05 TDB period 1481.820001276053 4.06 7.5052e-06 2.055e-08 d yr n .2429444869754694 1.2305e-09 deg/d Q 2.912518240494597 9.8343e-09 au   Orbit Determination Parameters    # obs. used (total)      2000      data-arc span      8845 days (24.22 yr)      first obs. used      1996-04-20      last obs. used      2020-07-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45157      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:36:08   Additional Information  Earth MOID = 1.20582 au   Jupiter MOID = 2.42206 au   T_jup = 3.398  [ hide covariance matrix ] Orbital Elements at Epoch 2456971.5 (2014-Nov-10.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1441470976190006 5.5322e-08   q 2.177451530506566 1.4034e-07 au tp 2457073.662924072196 (2015-Feb-20.16292407) 9.325e-05 TDB node 220.0514169471709 1.2774e-05 deg peri 223.4500693434393 2.923e-05 deg i 12.21393274865346 5.9995e-06 deg   Orbit Determination Parameters    # obs. used (total)      2000      data-arc span      8845 days (24.22 yr)      first obs. used      1996-04-20      last obs. used      2020-07-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45157      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:36:08   Additional Information  Jupiter MOID = 2.42206 au   T_jup = 3.398  Orbit Covariance (6×6)   e q tp node peri i e 3.060477991951892E-15 -7.753276708790344E-15 -4.303618173285975E-12 3.805948012125064E-14 -1.234593091812061E-12 -1.522012344391665E-14 q -7.753276708790344E-15 1.969561811862454E-14 1.093841525164811E-11 -9.659386164458114E-14 3.136272695785646E-12 3.870014591098888E-14 tp -4.303618173285975E-12 1.093841525164811E-11 8.695503856643765E-9 -6.501363474673777E-11 2.455187590791349E-9 2.555495379296884E-11 node 3.805948012125064E-14 -9.659386164458114E-14 -6.501363474673777E-11 1.631815887356511E-10 -1.769378096934268E-10 -5.998136426865172E-12 peri -1.234593091812061E-12 3.136272695785646E-12 2.455187590791349E-9 -1.769378096934268E-10 8.543707382301644E-10 1.283294529194724E-11 i -1.522012344391665E-14 3.870014591098888E-14 2.555495379296884E-11 -5.998136426865172E-12 1.283294529194724E-11 3.599458646008135E-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 13.8   n/a MPO332959   15049 (1998 XA90)          Discovered 1998-Dec-15 by LINEAR at Socorro Reference: 20000523/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 XA90 = 1996 HE24 = 1999 BT21  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-24 13:46 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin