+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17693 Wangdaheng (1997 CP28) Classification: Main-belt Asteroid          SPK-ID: 2017693 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09324067723330723 3.9882e-08   a 2.990676189940129 2.0463e-08 au q 2.711823516604584 1.2125e-07 au i 10.11479622985561 7.1713e-06 deg node 320.2251062479614 2.6876e-05 deg peri 113.1721966602512 5.1655e-05 deg M 242.3864507491841 4.3937e-05 deg tp 2459617.673644345955 (2022-Feb-07.17364435) 0.00023264 TDB period 1889.089423623551 5.17 1.9388e-05 5.308e-08 d yr n .1905680035566909 1.9559e-09 deg/d Q 3.269528863275673 2.2371e-08 au   Orbit Determination Parameters    # obs. used (total)      1015      data-arc span      10336 days (28.30 yr)      first obs. used      1992-02-29      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57254      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 18:13:40   Additional Information  Earth MOID = 1.74676 au   Jupiter MOID = 1.9559 au   T_jup = 3.226  [ 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 13.7   n/a MPO347662   diameter diameter 5.954 km 0.390 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.217   0.022 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17693 Wangdaheng           Discovered 1997 Feb. 15 by the Beijing Schmidt CCD Asteroid Program at Xinglong. Daheng Wang (b. 1915), research professor, director and honorary director of Changchun Institute of Optics and Fine Mechanics, is one of the founders of optical science and technology in China. He became a member of the Chinese Academy of Sciences in 1955. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020328/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1997 CP28 = 1992 DE9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-03 18:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin