+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100618 (1997 TJ11) Classification: Main-belt Asteroid          SPK-ID: 2100618 [ 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 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2303951935473018 3.1923e-08   a 2.761995069954662 1.0992e-08 au q 2.125644681235764 8.837e-08 au i 9.564688102180586 5.2631e-06 deg node 353.4125130362758 2.1399e-05 deg peri 315.1307378446788 2.4018e-05 deg M 64.66245338917399 1.0756e-05 deg tp 2458899.350287404274 (2020-Feb-19.85028740) 4.9612e-05 TDB period 1676.612792310359 4.59 1.0009e-05 2.74e-08 d yr n .214718628923213 1.2818e-09 deg/d Q 3.39834545867356 1.3525e-08 au   Orbit Determination Parameters    # obs. used (total)      1646      data-arc span      8504 days (23.28 yr)      first obs. used      1997-10-03      last obs. used      2021-01-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42772      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 08:25:48   Additional Information  Earth MOID = 1.12202 au   Jupiter MOID = 1.95737 au   T_jup = 3.282  [ show covariance matrix ] [ 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 14.64   n/a E2021B55   diameter diameter 3.939 km 0.905 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.198   0.045 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100618 (1997 TJ11)          Discovered 1997-Oct-03 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1997 TJ11 = 2000 DJ77  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-08 13:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin