+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   6318 Cronkite (1990 WA) Classification: Mars-crossing Asteroid          SPK-ID: 2006318 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4614408760398012 8.7821e-08   a 2.515192486454968 7.6718e-09 au q 1.354579862096462 2.1884e-07 au i 25.85498215110907 5.7933e-06 deg node 71.10415937665863 1.4911e-05 deg peri 12.24872054032081 1.7811e-05 deg M 196.6860834704989 1.1563e-05 deg tp 2459861.461191652704 (2022-Oct-08.96119165) 4.9477e-05 TDB period 1456.985626524919 3.99 6.6661e-06 1.825e-08 d yr n .2470854848847357 1.1305e-09 deg/d Q 3.675805110813474 1.1212e-08 au   Orbit Determination Parameters    # obs. used (total)      839      data-arc span      16738 days (45.83 yr)      first obs. used      1974-08-20      last obs. used      2020-06-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49479      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 18:33:41   Additional Information  Earth MOID = .375358 au   Jupiter MOID = 1.66157 au   T_jup = 3.179  [ 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 15.70   n/a E2021B10   diameter diameter 1.400 km 0.245 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.504   0.170 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   6318 Cronkite           Discovered 1990 Nov. 18 by E. F. Helin at Palomar. Named in honor of Walter Cronkite (b. 1916), whose integrity and unflappable character during his 60-year career in radio and television journalism have won him the acclaim and trust of his colleagues and the American public alike. Cronkite worked for the United Press during World War II, taking part in the Normandy beachhead assults and flying in B-17 raids. In 1950 he joined CBS News, becoming anchor of the then-15-minute-long `CBS Evening News' in 1962. The following year this became U.S. network television's first half-hour weeknight news broadcast, marking the debut of the new format with Cronkite's interview of President Kennedy. Since retiring as news anchor in the early 1980s, Cronkite has produced and narrated dozens of award-winning programs. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 19961026/MPCPages.arc Last Updated: 2003-09-26 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-16 00:43 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin