+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   103220 Kwongchuikuen (1999 YQ4) Classification: Main-belt Asteroid          SPK-ID: 2103220 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1901433940680007 4.7507e-08   a 2.67447798020252 1.5032e-08 au q 2.165943659686681 1.319e-07 au i 9.8871370771021 4.9834e-06 deg node 305.2248913596143 2.6356e-05 deg peri 162.930139520862 3.0094e-05 deg M 284.8488060068029 1.712e-05 deg tp 2459533.995786259166 (2021-Nov-15.49578626) 7.7809e-05 TDB period 1597.559222600876 4.37 1.3469e-05 3.688e-08 d yr n .2253437587208247 1.8999e-09 deg/d Q 3.183012300718358 1.7891e-08 au   Orbit Determination Parameters    # obs. used (total)      724      data-arc span      7729 days (21.16 yr)      first obs. used      1999-11-16      last obs. used      2021-01-13      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55181      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:45:41   Additional Information  Earth MOID = 1.1845 au   Jupiter MOID = 1.94818 au   T_jup = 3.332  [ 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 15.25   n/a E2021B55   103220 Kwongchuikuen           Discovered 1999 Dec. 28 by W. K. Y. Yeung at Rock Finder Observatory. Kwong Chui Kuen (b. 1960), a producer of documentaries for television, is the wife of the discoverer. This is the chronologically earliest minor planet credited to the discoverer. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080618/MPCPages.arc Last Updated: 2008-06-20 [ 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 1949-Dec-28 17:41 00:02 Jupiter 1.95449931183272 1.95449883755307 1.95449978611404 3.34670284203069 3.21460397900809 2433279.236747921 1.51712353462343 201.421117096557 16.4529017982216 85.8353427019156 2734583.78536956 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 15:45:43 2021-Apr-13 15:45 2033-Apr-15 02:23 < 00:01 Jupiter 1.97908789340332 1.97908744236567 1.97908834444367 3.34194597581514 3.21132843212018 2463702.599175761 0.427746736825376 237.309482160803 13.9398825015233 86.2788521738446 2679544.77494222 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 15:45:43 2021-Apr-13 15:45 2067-Nov-27 00:57 00:01 Jupiter 1.99826316128732 1.99826268409419 1.99826363848284 3.28486754816988 3.15318824173354 2476346.539560215 1.2092989264871 152.804201836935 9.59588538780903 81.926800109867 2947542.48840054 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 15:45:43 2021-Apr-13 15:45 2151-Mar-14 10:27 00:03 Jupiter 1.96097202070529 1.96097134822345 1.96097269320072 3.30602384002553 3.17268236185181 2506768.935752303 3.09724549449403 302.487868744051 9.7019911350045 83.8981778363925 2708333.57573675 T 23 CATAB v2.0f-lin.ifort 2021-Apr-13 15:45:43 2021-Apr-13 15:45 Alternate Designations  1999 YQ4 = 2002 PC21  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 12:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin