+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 36 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04704911273611788 4.187e-08   a 2.899548001207742 1.409e-08 au q 2.763126840415133 1.1969e-07 au i 2.80547415468651 4.7718e-06 deg node 144.7784802434385 8.1417e-05 deg peri 175.2473059837224 9.2829e-05 deg M 198.0844561673582 4.5185e-05 deg tp 2460011.610312574665 (2023-Mar-08.11031257) 0.00022704 TDB period 1803.407539604069 4.94 1.3145e-05 3.599e-08 d yr n .199622099882668 1.455e-09 deg/d Q 3.03596916200035 1.4753e-08 au   Orbit Determination Parameters    # obs. used (total)      1972      data-arc span      11318 days (30.99 yr)      first obs. used      1990-01-29      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51079      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:06:11   Additional Information  Earth MOID = 1.74803 au   Jupiter MOID = 2.1096 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 13.19   n/a E2021B10   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 ] 2021-Feb-28 17:13 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin