+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21735 Nissaschmidt (1999 RV146) Classification: Main-belt Asteroid          SPK-ID: 2021735 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .121732295457982 3.1234e-08   a 2.354161966105758 7.8764e-09 au q 2.067584426091828 7.5948e-08 au i 6.302029524194701 3.4072e-06 deg node 289.7483445676345 3.256e-05 deg peri 5.779755826660201 3.5845e-05 deg M 357.6201126372598 1.522e-05 deg tp 2459209.221814335102 (2020-Dec-25.72181434) 5.5784e-05 TDB period 1319.328473185122 3.61 6.6212e-06 1.813e-08 d yr n .2728660885570735 1.3694e-09 deg/d Q 2.640739506119687 8.8352e-09 au   Orbit Determination Parameters    # obs. used (total)      1566      data-arc span      9720 days (26.61 yr)      first obs. used      1994-01-11      last obs. used      2020-08-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47932      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 01:55:15   Additional Information  Earth MOID = 1.0497 au   Jupiter MOID = 2.53067 au   T_jup = 3.537  [ 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 14.70   n/a E2021B10   diameter diameter 3.012 km 0.209 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.338   0.097 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21735 Nissaschmidt           Discovered 1999 Sept. 9 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Nissa Leigh Schmidt (b. 1987) was awarded second place in the 2005 Intel International Science and Engineering Fair for her behavioral and social sciences project. She attends the Merino High School, Merino, Colorado, U.S.A. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20050822/MPCPages.arc Last Updated: 2005-08-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 06:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin