+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17437 Stekene (1989 SC4) Classification: Main-belt Asteroid          SPK-ID: 2017437 [ 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 34 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0523820986948862 2.4068e-08   a 3.163163058842971 1.8661e-08 au q 2.997469939306641 7.5114e-08 au i 21.5346509626916 9.7157e-07 deg node 191.5442194445286 1.8961e-06 deg peri 319.0744126145422 1.699e-05 deg M 73.97503177792734 1.8937e-05 deg tp 2458778.256029604878 (2019-Oct-21.75602960) 0.0001065 TDB period 2054.853180713335 5.63 1.8184e-05 4.979e-08 d yr n .1751949985424396 1.5504e-09 deg/d Q 3.328856178379302 1.9639e-08 au   Orbit Determination Parameters    # obs. used (total)      1898      data-arc span      11475 days (31.42 yr)      first obs. used      1989-09-26      last obs. used      2021-02-25      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50563      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:03:05   Additional Information  Earth MOID = 2.02326 au   Jupiter MOID = 1.67145 au   T_jup = 3.094  [ 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 12.99   n/a E2021B10   diameter diameter 13.992 km 2.072 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.075   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17437 Stekene           Discovered 1989 Sept. 26 by E. W. Elst at the European Southern Observatory. Stekene is a town in East-Flanders. Its church has a tower from the thirteenth century. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2017-11-04 Last Updated: 2017-11-07 [ show close-approach data ] Alternate Designations  1989 SC4 = 1995 WN42  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-15 03:04 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin