+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   74384 (1998 XQ20) Classification: Main-belt Asteroid          SPK-ID: 2074384 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09844619852920829 4.2307e-08   a 2.982072375281774 2.1232e-08 au q 2.688498686196317 1.2754e-07 au i 12.97290176367269 4.7063e-06 deg node 111.5470427254327 2.4971e-05 deg peri 8.7329775053059 4.918e-05 deg M 50.95055951743539 3.9218e-05 deg tp 2458734.291356057168 (2019-Sep-07.79135606) 0.0002048 TDB period 1880.943265924774 5.15 2.0088e-05 5.5e-08 d yr n .191393332548499 2.0441e-09 deg/d Q 3.275646064367231 2.3322e-08 au   Orbit Determination Parameters    # obs. used (total)      764      data-arc span      7837 days (21.46 yr)      first obs. used      1998-12-10      last obs. used      2020-05-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52635      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 21:43:55   Additional Information  Earth MOID = 1.70536 au   Jupiter MOID = 1.82666 au   T_jup = 3.213  [ 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 14.7   n/a MPO324953   diameter diameter 3.551 km 0.786 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.202   0.083 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   74384 (1998 XQ20)          Discovered 1998-Dec-10 by Spacewatch at Kitt Peak Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1914-Jan-07 04:44 00:03 Jupiter 1.85799162256933 1.85799087062187 1.85799237452629 3.80820404703432 3.68655078223056 2420139.697042667 3.1924431083683 277.130887033268 22.5252012819114 -84.6322974624809 3289935.25739792 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 21:43:57 2020-Nov-12 21:43 1950-Jul-15 02:17 00:02 Jupiter 1.85177127870794 1.85177048996409 1.85177206745496 3.39746042921225 3.2600480437336 2433477.594997684 2.15778972149138 181.071692914484 24.1036025178717 79.424071342664 2311834.79589688 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 21:43:57 2020-Nov-12 21:43 2032-Jul-18 22:03 < 00:01 Jupiter 1.87615730594665 1.87615687782284 1.87615773407046 3.84078491707361 3.72138353480341 2463432.418707668 0.647312519288845 93.6966654341904 19.6275142930078 89.3561359733575 3448051.46442621 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 21:43:57 2020-Nov-12 21:43 2069-Jan-22 22:33 00:02 Jupiter 1.84495833469027 1.84495768446811 1.8449589849139 3.39216922966719 3.25401440656718 2476769.439503782 1.80120859022207 157.964432529631 23.8393019067758 81.6634064416851 2354700.14126064 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 21:43:57 2020-Nov-12 21:43 2105-Aug-30 05:57 00:03 Jupiter 1.9858844870459 1.98588321269189 1.98588576140477 2.9179893911246 2.76796296950302 2490136.747981112 3.25579693231723 201.030520741142 21.840187567128 74.6678058821448 1802555.46892078 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 21:43:57 2020-Nov-12 21:43 2151-Jan-29 16:03 00:04 Jupiter 1.89653578061893 1.89653430063728 1.89653726061891 3.88144668101374 3.76462442809187 2506725.169087114 4.25105599183322 330.021892047812 26.6409976741399 -78.9442391294228 3623105.40766279 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 21:43:57 2020-Nov-12 21:43 2187-Aug-05 08:15 00:06 Jupiter 1.84139881349152 1.84139810136449 1.84139952563865 3.39400897906764 3.25565964004686 2520061.843896969 5.63831547131363 469.941872878534 23.4942293722122 85.0018295398707 2413630.8791898 T 22 CATAB v2.0f-lin.ifort 2020-Nov-12 21:43:57 2020-Nov-12 21:43 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-16 09:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin