+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   12491 Musschenbroek (1997 JE15) Classification: Main-belt Asteroid          SPK-ID: 2012491 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04694780538401712 4.3113e-08   a 2.899805095947801 1.5476e-08 au q 2.763665610651663 1.222e-07 au i 2.805209701930235 4.8038e-06 deg node 144.7795992525251 8.6507e-05 deg peri 175.0961088518335 9.8524e-05 deg M 158.3279535208959 4.6868e-05 deg tp 2458207.256106562809 (2018-Mar-29.75610656) 0.00023502 TDB period 1803.647399508008 4.94 1.4438e-05 3.953e-08 d yr n .1995955529324631 1.5978e-09 deg/d Q 3.03594458124394 1.6202e-08 au   Orbit Determination Parameters    # obs. used (total)      1838      data-arc span      10961 days (30.01 yr)      first obs. used      1990-01-29      last obs. used      2020-02-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51553      source      ORB      producer      Otto Matic      solution date      2020-Feb-22 20:21:34   Additional Information  Earth MOID = 1.75053 au   Jupiter MOID = 2.11006 au   T_jup = 3.284  [ 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 13.2   n/a MPO458946   diameter diameter 7.106 km 0.175 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.201   0.026 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   12491 Musschenbroek           Discovered 1997 May 3 by E. W. Elst at the European Southern Observatory. Petrus van Musschenbroek (1692-1761) was a Dutch experimental scientist who will be always remembered for his invention of the Leiden jar, a capacitor capable of collecting electrostatic electricity. In 1792 he published his treatise on experimental physics, Physicae experimentales. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20040928/MPCPages.arc Last Updated: 2004-09-28 Alternate Designations  1997 JE15 = 1990 BJ5 = 1996 CM2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-20 03:20 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin