+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05558486070888637 3.3995e-08   a 3.115665058531552 1.8159e-08 au q 2.942481250237532 1.1329e-07 au i 11.20256531584036 3.6348e-06 deg node 160.5135739707783 2.0397e-05 deg peri 172.3841722945201 4.4927e-05 deg M 297.4093542142714 4.1821e-05 deg tp 2459549.746051098695 (2021-Dec-01.24605110) 0.00023446 TDB period 2008.743907611154 5.50 1.7562e-05 4.808e-08 d yr n .179216473855107 1.5668e-09 deg/d Q 3.288848866825573 1.9169e-08 au   Orbit Determination Parameters    # obs. used (total)      1744      data-arc span      8559 days (23.43 yr)      first obs. used      1997-03-10      last obs. used      2020-08-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48847      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:19:28   Additional Information  Earth MOID = 1.93099 au   Jupiter MOID = 1.9991 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 13.29   n/a E2021B10   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 1.98710152765307 1.98710118826797 1.98710186703817 4.79237702184884 4.7025904453713 2429573.010956530 1.88361207784203 145.576078604914 15.6647507376667 89.6199075845161 4745959.30303735 T 30 CATAB v2.0f-lin.ifort 2020-Nov-13 02:19:33 2020-Nov-13 02:19 Alternate Designations  1997 EW42 = 1998 HU124 = 1999 RZ46  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-06 12:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin