+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19222 (1993 QK1) Classification: Main-belt Asteroid          SPK-ID: 2019222 [ 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 37 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1674783418078346 2.5861e-08   a 2.369351550920036 7.0403e-09 au q 1.972536482012127 6.2093e-08 au i 2.329996903480705 2.899e-06 deg node 273.4476394723182 8.9452e-05 deg peri 353.50327169 9.0097e-05 deg M 231.4288304829503 1.1429e-05 deg tp 2459676.255454299645 (2022-Apr-06.75545430) 4.2839e-05 TDB period 1332.117956080038 3.65 5.9374e-06 1.626e-08 d yr n .2702463384393942 1.2045e-09 deg/d Q 2.766166619827944 8.2194e-09 au   Orbit Determination Parameters    # obs. used (total)      1966      data-arc span      17128 days (46.89 yr)      first obs. used      1974-04-22      last obs. used      2021-03-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51355      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:49:11   Additional Information  Earth MOID = .954824 au   Jupiter MOID = 2.31796 au   T_jup = 3.526  [ 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 14.56   n/a E2021B10   diameter diameter 7.250 km 0.077 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.053   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19222 (1993 QK1)          Discovered 1993-Aug-16 by Elst, E. W. at Caussols Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1993 QK1 = 1974 HE = 1998 YF16 = 1999 AH39 = 2000 OY9  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 19:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin