+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100940 Maunder (1998 MM47) Classification: Main-belt Asteroid          SPK-ID: 2100940 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1666463939155459 6.1577e-08   a 2.611430828751314 2.0955e-08 au q 2.176245298180022 1.5661e-07 au i 15.85925594855566 7.906e-06 deg node 111.3939220117341 2.0608e-05 deg peri 144.2559678459618 3.1623e-05 deg M 92.8946640070445 2.7536e-05 deg tp 2458602.755223787166 (2019-Apr-29.25522379) 0.00011521 TDB period 1541.403060844935 4.22 1.8554e-05 5.08e-08 d yr n .2335534482477688 2.8112e-09 deg/d Q 3.046616359322607 2.4448e-08 au   Orbit Determination Parameters    # obs. used (total)      500      data-arc span      7272 days (19.91 yr)      first obs. used      1998-06-26      last obs. used      2018-05-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57014      source      ORB      producer      Otto Matic      solution date      2018-Oct-04 03:57:51   Additional Information  Earth MOID = 1.1784 au   Jupiter MOID = 2.12147 au   T_jup = 3.336  [ 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 15.2   n/a MPO344986   diameter diameter 4.494 km 0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.087   0.007 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   100940 Maunder           Discovered 1998 June 28 by E. W. Elst at the European Southern Observatory. Edward Walter Maunder (1851-1925), a British astronomer, was the driving force in the foundation of the British Astronomical Association. He is well-known for discovering a prolonged minimum in solar activity from 1645 to 1715, corresponding with lower than average European temperatures. 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 Alternate Designations  1998 MM47 = 2001 BK7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Oct-22 13:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin