+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17698 Racheldavis (1997 EW42) Classification: Main-belt Asteroid          SPK-ID: 2017698 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05540923246430897 3.4003e-08   a 3.114502438548409 1.8345e-08 au q 2.941930248920223 1.1315e-07 au i 11.20254053910535 3.6397e-06 deg node 160.5239794188158 2.0418e-05 deg peri 172.7334963500639 4.5055e-05 deg M 261.1808690226862 4.1839e-05 deg tp 2459551.586750117768 (2021-Dec-03.08675012) 0.00023511 TDB period 2007.619659071296 5.50 1.7737e-05 4.856e-08 d yr n .1793168334317528 1.5843e-09 deg/d Q 3.287074628176594 1.9361e-08 au   Orbit Determination Parameters    # obs. used (total)      1726      data-arc span      8545 days (23.39 yr)      first obs. used      1997-03-10      last obs. used      2020-08-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48677      source      ORB      producer      Otto Matic      solution date      2020-Aug-25 01:14:55   Additional Information  Earth MOID = 1.93236 au   Jupiter MOID = 2.00145 au   T_jup = 3.186  [ 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 13.3   n/a MPO474001   diameter diameter 11.716 km 0.157 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.062   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17698 Racheldavis           Discovered 1997 Mar. 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Rachel Michelle Davis (b. 1993) is a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors, for her materials science project. She attends the Smithtown High School East, St. James, New York. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20120506/MPCPages.arc Last Updated: 2012-05-09 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1939-Nov-05 12:16 00:02 Jupiter 1.9871015259046 1.98710118622651 1.9871018655827 4.79237704426259 4.70259046813324 2429573.010943796 1.88446044222324 145.649161489938 15.67784550414 89.6228271421597 4741164.95793232 T 29 CATAB v2.0f-lin.ifort 2020-Aug-25 01:15:08 2020-Aug-25 01:15 Alternate Designations  1997 EW42 = 1998 HU124 = 1999 RZ46  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-27 04:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin