+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   204786 Wehlau (2006 KU131) Classification: Main-belt Asteroid          SPK-ID: 2204786 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04973054901433904 5.4362e-08   a 2.586146715047684 1.726e-08 au q 2.457536219076733 1.455e-07 au i .3882594803555391 5.8204e-06 deg node 287.297285895956 0.00081389 deg peri 85.82152926238359 0.00081605 deg M 58.89229853225919 5.837e-05 deg tp 2458951.995550110841 (2020-Apr-12.49555011) 0.00024622 TDB period 1519.071324938916 4.16 1.5208e-05 4.164e-08 d yr n .2369868972508424 2.3725e-09 deg/d Q 2.714757211018635 1.8119e-08 au   Orbit Determination Parameters    # obs. used (total)      219      data-arc span      7721 days (21.14 yr)      first obs. used      1999-11-15      last obs. used      2021-01-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57293      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 12:29:54   Additional Information  Earth MOID = 1.45573 au   Jupiter MOID = 2.49821 au   T_jup = 3.420  [ 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 17.1   n/a MPO494146   204786 Wehlau           Discovered 2006 May 25 by P. A. Wiegert at Mauna Kea. William Henry Wehlau (1926-1995) was an American-born Canadian astronomer who pioneered the field of stellar surface mapping using observed rotational variability of surface abundances and magnetic field strength. He served on the Board of the Canada-France-Hawaii Telescope from 1974 to 1985. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2013-04-25 Last Updated: 2013-04-29 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 18:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin