+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17863 (1998 KN30) Classification: Main-belt Asteroid          SPK-ID: 2017863 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .08422780895029038 3.647e-08   a 3.01543426389417 1.7799e-08 au q 2.761450842812732 1.1509e-07 au i 11.15184544859093 4.4162e-06 deg node 42.26795559695535 2.3802e-05 deg peri 25.67050590344775 4.1919e-05 deg M 283.5695795695593 3.7311e-05 deg tp 2459606.556972895571 (2022-Jan-27.05697290) 0.00020001 TDB period 1912.595919519301 5.24 1.6934e-05 4.636e-08 d yr n .1882258538387345 1.6666e-09 deg/d Q 3.269417684975607 1.9299e-08 au   Orbit Determination Parameters    # obs. used (total)      1984      data-arc span      15029 days (41.15 yr)      first obs. used      1979-11-17      last obs. used      2021-01-09      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47559      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:15:47   Additional Information  Earth MOID = 1.77825 au   Jupiter MOID = 2.08796 au   T_jup = 3.214  [ 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 12.98   n/a E2021B10   diameter diameter 9.323 km 0.054 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.169   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17863 (1998 KN30)          Discovered 1998-May-22 by LINEAR at Socorro Reference: 20001013/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 KN30 = 1979 WX5 = 1992 HF7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-18 11:06 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin