+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74058 (1998 KQ18) Classification: Main-belt Asteroid          SPK-ID: 2074058 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1992861660178858 5.0698e-08   a 2.416861197360898 1.4438e-08 au q 1.935214195541448 1.2795e-07 au i 2.647043756585695 5.8819e-06 deg node 30.64994975702148 0.00010303 deg peri 223.5336994728526 0.00010432 deg M 294.3562246744322 2.0777e-05 deg tp 2459250.745940030752 (2021-Feb-05.24594003) 8.0784e-05 TDB period 1372.385088521587 3.76 1.2298e-05 3.367e-08 d yr n .2623170442545488 2.3506e-09 deg/d Q 2.898508199180348 1.7316e-08 au   Orbit Determination Parameters    # obs. used (total)      454      data-arc span      9534 days (26.10 yr)      first obs. used      1994-03-14      last obs. used      2020-04-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59988      source      ORB      producer      Otto Matic      solution date      2020-May-20 14:02:49   Additional Information  Earth MOID = .921681 au   Jupiter MOID = 2.15555 au   T_jup = 3.487  [ hide covariance matrix ] Orbital Elements at Epoch 2456759.5 (2014-Apr-12.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1998613468182875 5.0504e-08   q 1.933749509335936 1.2749e-07 au tp 2456505.944337078633 (2013-Aug-01.44433708) 6.5554e-05 TDB node 30.67565841820796 0.00010303 deg peri 223.5567328554914 0.00010433 deg i 2.647701939733262 5.8811e-06 deg   Orbit Determination Parameters    # obs. used (total)      454      data-arc span      9534 days (26.10 yr)      first obs. used      1994-03-14      last obs. used      2020-04-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59988      source      ORB      producer      Otto Matic      solution date      2020-May-20 14:02:49   Additional Information  Jupiter MOID = 2.15555 au   T_jup = 3.487  Orbit Covariance (6×6)   e q tp node peri i e 2.550631223047766E-15 -6.417491943947769E-15 -1.568155212088544E-12 7.60374528711234E-15 -3.6900074344289E-13 -1.521288469787669E-16 q -6.417491943947769E-15 1.625392334815676E-14 4.165994719302791E-12 -2.084367959608878E-14 9.843303790631963E-13 7.113252623399028E-16 tp -1.568155212088544E-12 4.165994719302791E-12 4.29738412080813E-9 -1.545751068851824E-11 1.092336105187956E-9 1.780555955729214E-12 node 7.60374528711234E-15 -2.084367959608878E-14 -1.545751068851824E-11 1.061506631624728E-8 -1.060733779581947E-8 -8.130498068281264E-11 peri -3.6900074344289E-13 9.843303790631963E-13 1.092336105187956E-9 -1.060733779581947E-8 1.08839986463131E-8 8.168875625781305E-11 i -1.521288469787669E-16 7.113252623399028E-16 1.780555955729214E-12 -8.130498068281264E-11 8.168875625781305E-11 3.458677601361148E-11 [ 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 16.4   n/a MPO493386   74058 (1998 KQ18)          Discovered 1998-May-22 by LINEAR at Socorro Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 KQ18 = 1999 UH33  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-15 17:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin