+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09336519751670631 3.7116e-08   a 2.98759439680751 1.7341e-08 au q 2.708657055849771 1.1576e-07 au i 10.11950866401846 6.5317e-06 deg node 320.2246059111432 1.8411e-05 deg peri 113.8137654191717 4.3938e-05 deg M 279.8691706093949 4.1092e-05 deg tp 2459620.334397943647 (2022-Feb-09.83439794) 0.00021717 TDB period 1886.170209507818 5.16 1.6422e-05 4.496e-08 d yr n .19086294449213 1.6618e-09 deg/d Q 3.266531737765248 1.8961e-08 au   Orbit Determination Parameters    # obs. used (total)      1326      data-arc span      10539 days (28.85 yr)      first obs. used      1992-02-29      last obs. used      2021-01-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52849      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:10:18   Additional Information  Earth MOID = 1.74308 au   Jupiter MOID = 1.95587 au   T_jup = 3.227  [ 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 13.74   n/a E2021B10   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 ] 2021-Apr-16 15:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin