+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18839 Whiteley (1999 PG) Classification: Main-belt Asteroid          SPK-ID: 2018839 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08041614070639901 3.4081e-08   a 2.980365635883838 1.4314e-08 au q 2.740696133552087 1.0611e-07 au i 10.5943331175015 3.2191e-06 deg node 72.9699772599421 2.0281e-05 deg peri 245.2730388200211 3.5902e-05 deg M 38.72729437417057 2.6977e-05 deg tp 2458998.329677581744 (2020-May-28.82967758) 0.00014135 TDB period 1879.328707226033 5.15 1.3539e-05 3.707e-08 d yr n .1915577613515919 1.38e-09 deg/d Q 3.220035138215589 1.5465e-08 au   Orbit Determination Parameters    # obs. used (total)      1907      data-arc span      9183 days (25.14 yr)      first obs. used      1995-12-22      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49983      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:39:17   Additional Information  Earth MOID = 1.74554 au   Jupiter MOID = 2.00568 au   T_jup = 3.229  [ 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 13.42   n/a E2021B10   diameter diameter 7.525 km 0.184 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.179   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18839 Whiteley           Discovered 1999 Aug. 5 by J. Broughton at Reedy Creek Observatory. Abstract artist Brett Whiteley (1939-1992) was Australia's leading painter of his generation and winner of all the major Australian art prizes many times over. As is evident in his self portraits, the Harpo-like Whiteley would not have looked out of place alongside the Marx Brothers. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010705/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  1999 PG = 1998 HY105  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-19 01:16 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin