+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1833021634089756 4.7188e-08   a 2.361269970641188 1.2207e-08 au q 1.92844407663001 1.1407e-07 au i 3.72691702611717 4.5345e-06 deg node 300.9362496815688 7.3487e-05 deg peri 53.30879104214112 7.5096e-05 deg M 341.9317959783636 2.1022e-05 deg tp 2459067.016498283326 (2020-Aug-05.51649828) 7.7766e-05 TDB period 1325.308223956425 3.63 1.0277e-05 2.814e-08 d yr n .271634924987711 2.1064e-09 deg/d Q 2.794095864652366 1.4445e-08 au   Orbit Determination Parameters    # obs. used (total)      673      data-arc span      10124 days (27.72 yr)      first obs. used      1991-10-11      last obs. used      2019-06-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55357      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 09:17:07   Additional Information  Earth MOID = .926065 au   Jupiter MOID = 2.65095 au   T_jup = 3.525  [ hide covariance matrix ] Orbital Elements at Epoch 2456827.5 (2014-Jun-19.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1828572040157292 4.6996e-08   q 1.930528407584637 1.1352e-07 au tp 2456417.230377259286 (2013-May-04.73037726) 6.5395e-05 TDB node 301.0046392459432 7.3475e-05 deg peri 53.54370083742383 7.5108e-05 deg i 3.726828965796973 4.5332e-06 deg   Orbit Determination Parameters    # obs. used (total)      673      data-arc span      10124 days (27.72 yr)      first obs. used      1991-10-11      last obs. used      2019-06-30      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55357      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 09:17:07   Additional Information  Jupiter MOID = 2.65095 au   T_jup = 3.525  Orbit Covariance (6×6)   e q tp node peri i e 2.208625698372036E-15 -5.316662458087829E-15 -4.239464224511815E-14 1.012826980114844E-14 -4.350458502043088E-14 1.327189644686537E-15 q -5.316662458087829E-15 1.288770154520252E-14 4.392991994046195E-13 -2.602658314606506E-14 1.877420561584042E-13 -2.861374602666352E-15 tp -4.239464224511815E-14 4.392991994046195E-13 4.276485277241548E-9 -1.298173755832128E-11 1.042850904973579E-9 1.751665667579315E-12 node 1.012826980114844E-14 -2.602658314606506E-14 -1.298173755832128E-11 5.398570575992929E-9 -5.390198179034946E-9 3.158476167591516E-11 peri -4.350458502043088E-14 1.877420561584042E-13 1.042850904973579E-9 -5.390198179034946E-9 5.641249829152769E-9 -3.111748906774971E-11 i 1.327189644686537E-15 -2.861374602666352E-15 1.751665667579315E-12 3.158476167591516E-11 -3.111748906774971E-11 2.054996098082196E-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 15.7   n/a MPO290802   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 ] 2020-Aug-08 03:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin