+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   8672 Morse (1991 PW16) Classification: Main-belt Asteroid          SPK-ID: 2008672 [ 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 .161687849268169 3.3415e-08   a 2.455660350087832 8.0745e-09 au q 2.058609909549012 8.2478e-08 au i 3.398626677586225 3.9897e-06 deg node 136.5662823389928 4.883e-05 deg peri 147.3329811206117 4.9966e-05 deg M 252.9275798465112 1.0178e-05 deg tp 2459618.547848115554 (2022-Feb-08.04784812) 4.0392e-05 TDB period 1405.564804698175 3.85 6.9325e-06 1.898e-08 d yr n .2561247968052991 1.2633e-09 deg/d Q 2.852710790626653 9.38e-09 au   Orbit Determination Parameters    # obs. used (total)      1786      data-arc span      18204 days (49.84 yr)      first obs. used      1971-05-13      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51386      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 20:47:57   Additional Information  Earth MOID = 1.04126 au   Jupiter MOID = 2.29423 au   T_jup = 3.472  [ 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 14.53   n/a E2021B10   diameter diameter 2.735 km 0.491 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.410   0.075 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   8672 Morse           Discovered 1991 Aug. 6 by E. W. Elst at the European Southern Observatory. Samuel Finley Breese Morse (1791-1872) was an American painter and inventor who in 1838 developed the code of dots and dashes that now bears his name. After constructing the first telegraph between Baltimore and Washington, he became a philanthropist. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20021120/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1991 PW16 = 1976 UD16  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-22 12:26 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin