+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   20719 Velasco (1999 XL99) Classification: Main-belt Asteroid          SPK-ID: 2020719 [ 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 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1310910047346099 3.1052e-08   a 2.331631350643982 6.0561e-09 au q 2.025975454217347 7.2007e-08 au i 1.966387490499735 2.7743e-06 deg node 286.9486448083169 0.00010706 deg peri 61.60168394151236 0.00010781 deg M 48.35109041485297 1.2493e-05 deg tp 2459025.840574211827 (2020-Jun-25.34057421) 4.5167e-05 TDB period 1300.43382153853 3.56 5.0666e-06 1.387e-08 d yr n .2768306960627092 1.0785e-09 deg/d Q 2.637287247070617 6.85e-09 au   Orbit Determination Parameters    # obs. used (total)      1948      data-arc span      25985 days (71.14 yr)      first obs. used      1949-12-22      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4726      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 03:28:25   Additional Information  Earth MOID = 1.01843 au   Jupiter MOID = 2.75651 au   T_jup = 3.558  [ 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 14.95   n/a E2021B10   20719 Velasco           Discovered 1999 Dec. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Rodrigo Velasco Velasco (b. 1985) was awarded second place in the 2004 Intel International Science and Engineering Fair for his computer science team project. He attends the C.B.T.i.s. No. 168, Aguascalientes, Mexico. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20041226/MPCPages.arc Last Updated: 2004-12-25 Alternate Designations  1999 XL99 = 1988 VP13 = 1991 ND3 = 1997 EP42  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-21 12:18 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin