+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22675 Davidcohn (1998 QZ39) Classification: Main-belt Asteroid          SPK-ID: 2022675 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .105930489019464 4.0304e-08   a 2.793575557133215 1.575e-08 au q 2.497650732253272 1.178e-07 au i 6.132339097279127 5.9623e-06 deg node 333.9664462633989 3.6979e-05 deg peri 308.1857054618003 4.9253e-05 deg M 327.5441998020901 3.4647e-05 deg tp 2459354.254869992110 (2021-May-19.75486999) 0.00016431 TDB period 1705.450269586145 4.67 1.4423e-05 3.949e-08 d yr n .2110879492765038 1.7851e-09 deg/d Q 3.089500382013158 1.7418e-08 au   Orbit Determination Parameters    # obs. used (total)      1472      data-arc span      8922 days (24.43 yr)      first obs. used      1996-01-12      last obs. used      2020-06-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49236      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:09:10   Additional Information  Earth MOID = 1.48516 au   Jupiter MOID = 2.07708 au   T_jup = 3.311  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.03   n/a E2021B10   diameter diameter 4.181 km 1.117 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.305   0.214 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   22675 Davidcohn           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. David Milton Cohn, III (b. 1992) is a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for his environmental sciences project. He attends the Rhoades School, Encinitas, California. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20061009/MPCPages.arc Last Updated: 2006-10-14 Alternate Designations  1998 QZ39 = 1996 BZ14  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-19 20:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin