+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19810 Partridge (2000 SP112) Classification: Main-belt Asteroid          SPK-ID: 2019810 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0100908993241451 4.0532e-08   a 3.082136901932608 2.1876e-08 au q 3.051035368751974 1.1844e-07 au i 5.994556840415482 4.8832e-06 deg node 20.31061029018013 4.2302e-05 deg peri 87.97753797210163 0.00025575 deg M 218.0218576957905 0.00025273 deg tp 2460175.962638704940 (2023-Aug-19.46263871) 0.0013887 TDB period 1976.406687534598 5.41 2.1042e-05 5.761e-08 d yr n .1821487461414482 1.9393e-09 deg/d Q 3.113238435113242 2.2097e-08 au   Orbit Determination Parameters    # obs. used (total)      1256      data-arc span      8889 days (24.34 yr)      first obs. used      1997-03-04      last obs. used      2021-07-05      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55553      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 14:01:39   Additional Information  Earth MOID = 2.07552 au   Jupiter MOID = 1.86593 au   T_jup = 3.219  [ 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 13.81   n/a MPCxxxxx   diameter diameter 9.365 km 0.231 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.046   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19810 Partridge           Discovered 2000 Sept. 24 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Mary Partridge mentored a finalist in the 2003 Discovery Channel Youth Science Challenge, a middle school science competition. She teaches at the St. Joseph School, Athens, Georgia. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20031010/MPCPages.arc Last Updated: 2003-10-10 [ show close-approach data ] Alternate Designations  2000 SP112 = 1997 EC33 = 1998 HV153  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jul-25 01:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin