+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58681 (1998 AJ7) Classification: Main-belt Asteroid          SPK-ID: 2058681 [ 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 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1733801149188856 3.0399e-08   a 2.606950298120502 1.1968e-08 au q 2.154956955844546 7.9126e-08 au i 3.539579380366678 4.0733e-06 deg node 319.6565066501739 5.6224e-05 deg peri 88.44104519894317 5.7952e-05 deg M 159.686698358246 1.5668e-05 deg tp 2458318.532317132670 (2018-Jul-19.03231713) 6.396e-05 TDB period 1537.437797614537 4.21 1.0587e-05 2.899e-08 d yr n .2341558146668242 1.6124e-09 deg/d Q 3.058943640396458 1.4043e-08 au   Orbit Determination Parameters    # obs. used (total)      1248      data-arc span      8719 days (23.87 yr)      first obs. used      1996-08-09      last obs. used      2020-06-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50742      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:50:05   Additional Information  Earth MOID = 1.16844 au   Jupiter MOID = 2.33624 au   T_jup = 3.388  [ hide covariance matrix ] Orbital Elements at Epoch 2456972.5 (2014-Nov-11.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1717807800022952 3.0356e-08   q 2.160866279905267 7.8805e-08 au tp 2456781.557888113913 (2014-May-04.05788811) 5.9011e-05 TDB node 319.706258548709 5.6146e-05 deg peri 88.84638711614538 5.7907e-05 deg i 3.541592829107505 4.0735e-06 deg   Orbit Determination Parameters    # obs. used (total)      1248      data-arc span      8719 days (23.87 yr)      first obs. used      1996-08-09      last obs. used      2020-06-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50742      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:50:05   Additional Information  Jupiter MOID = 2.33624 au   T_jup = 3.388  Orbit Covariance (6×6)   e q tp node peri i e 9.214733137245438E-16 -2.373779721231345E-15 -3.049781956645587E-14 -3.036208684295233E-15 -2.742060316270733E-14 9.446434985431193E-17 q -2.373779721231345E-15 6.210245219709633E-15 3.429759503538517E-13 5.745277090931793E-15 1.342478734766188E-13 -2.906568862933645E-16 tp -3.049781956645587E-14 3.429759503538517E-13 3.482242101881493E-9 -1.95097121076907E-11 8.467132517439993E-10 -9.085543524771332E-13 node -3.036208684295233E-15 5.745277090931793E-15 -1.95097121076907E-11 3.152363450952605E-9 -3.15063004573565E-9 1.737681136944325E-11 peri -2.742060316270733E-14 1.342478734766188E-13 8.467132517439993E-10 -3.15063004573565E-9 3.353206314560756E-9 -1.75650820266723E-11 i 9.446434985431193E-17 -2.906568862933645E-16 -9.085543524771332E-13 1.737681136944325E-11 -1.75650820266723E-11 1.659337565789122E-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 14.91   n/a E2021B10   58681 (1998 AJ7)          Discovered 1998-Jan-05 by BAO Schmidt CCD Asteroid Program at Xinglong Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 AJ7 = 1997 YJ20 = 2001 TQ37  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Feb-25 05:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin