+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19595 Lafer-Sousa (1999 NW31) Classification: Main-belt Asteroid          SPK-ID: 2019595 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05207251442822461 2.6026e-08   a 2.560283957734322 1.0621e-08 au q 2.42696353440485 6.4759e-08 au i 1.792600852408868 3.0755e-06 deg node 138.9159372855581 0.00011582 deg peri 155.21976988 0.00012343 deg M 86.70347159995667 4.2073e-05 deg tp 2458840.116735016686 (2019-Dec-22.61673502) 0.00017583 TDB period 1496.341184498289 4.10 9.3107e-06 2.549e-08 d yr n .2405868419111281 1.497e-09 deg/d Q 2.693604381063794 1.1174e-08 au   Orbit Determination Parameters    # obs. used (total)      1456      data-arc span      8848 days (24.22 yr)      first obs. used      1996-12-14      last obs. used      2021-03-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52177      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:59:07   Additional Information  Earth MOID = 1.40906 au   Jupiter MOID = 2.3866 au   T_jup = 3.433  [ 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 14.97   n/a E2021B10   diameter diameter 2.873 km 0.212 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.257   0.066 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19595 Lafer-Sousa           Discovered 1999 July 14 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Luis Lafer-Sousa (b. 1989) is a finalist in the 2003 Discovery Channel Young Scientist Challenge, a middle school science competition, for his biochemistry, medicine, health and microbiology project. He attends the Keystone Junior High School, San Antonio, Texas. 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 Alternate Designations  1999 NW31 = 1996 XK26 = 1998 FR35  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 00:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin