+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   48949 (1998 QR16) Classification: Main-belt Asteroid          SPK-ID: 2048949 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1831878855311745 4.5122e-08   a 2.36098675368005 6.8985e-09 au q 1.928482582506289 1.0682e-07 au i 3.726949238229154 3.2425e-06 deg node 300.9361515118325 6.981e-05 deg peri 53.34042528167768 7.0359e-05 deg M 36.24412926665233 9.0413e-06 deg tp 2459067.094442379454 (2020-Aug-05.59444238) 3.3315e-05 TDB period 1325.069789649617 3.63 5.8075e-06 1.59e-08 d yr n .2716838032321252 1.1907e-09 deg/d Q 2.793490924853809 8.1622e-09 au   Orbit Determination Parameters    # obs. used (total)      1094      data-arc span      10688 days (29.26 yr)      first obs. used      1991-10-11      last obs. used      2021-01-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48165      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 04:58:38   Additional Information  Earth MOID = .924402 au   Jupiter MOID = 2.6522 au   T_jup = 3.526  [ hide covariance matrix ] Orbital Elements at Epoch 2457568.5 (2016-Jun-29.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1840711114703474 4.5105e-08   q 1.926258294746761 1.0691e-07 au tp 2457742.897357187788 (2016-Dec-20.39735719) 3.4063e-05 TDB node 300.9809687657208 6.9877e-05 deg peri 53.56822967543372 7.042e-05 deg i 3.725444699203384 3.2413e-06 deg   Orbit Determination Parameters    # obs. used (total)      1094      data-arc span      10688 days (29.26 yr)      first obs. used      1991-10-11      last obs. used      2021-01-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48165      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 04:58:38   Additional Information  Jupiter MOID = 2.6522 au   T_jup = 3.526  Orbit Covariance (6×6)   e q tp node peri i e 2.034452575570219E-15 -4.815538558204711E-15 5.689563878817233E-13 1.427865191025345E-14 9.54190203017831E-14 -2.670966939872475E-15 q -4.815538558204711E-15 1.143034157128339E-14 -1.392725472047947E-12 -3.388554214244939E-14 -2.393580753154434E-13 6.405366381678465E-15 tp 5.689563878817233E-13 -1.392725472047947E-12 1.160270762912837E-9 7.999723900433792E-12 3.176531955259384E-10 -1.512751268244148E-12 node 1.427865191025345E-14 -3.388554214244939E-14 7.999723900433792E-12 4.882850108226894E-9 -4.870908272158293E-9 4.718255116229743E-11 peri 9.54190203017831E-14 -2.393580753154434E-13 3.176531955259384E-10 -4.870908272158293E-9 4.95900764344914E-9 -4.744723814055527E-11 i -2.670966939872475E-15 6.405366381678465E-15 -1.512751268244148E-12 4.718255116229743E-11 -4.744723814055527E-11 1.050607900192843E-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 15.77   n/a E2021B10   48949 (1998 QR16)          Discovered 1998-Aug-17 by LINEAR at Socorro Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 QR16 = 2000 CT20  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-11 22:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin