+ 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 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 35 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05221553889337081 2.407e-08   a 3.163287827301412 1.7012e-08 au q 2.998115048724028 7.4776e-08 au i 21.53447617733995 9.6749e-07 deg node 191.5428323032367 1.8907e-06 deg peri 319.113355332797 1.7026e-05 deg M 108.2932678899732 1.9013e-05 deg tp 2458778.333521691359 (2019-Oct-21.83352169) 0.00010637 TDB period 2054.97475999351 5.63 1.6577e-05 4.539e-08 d yr n .1751846334118171 1.4132e-09 deg/d Q 3.328460605878795 1.79e-08 au   Orbit Determination Parameters    # obs. used (total)      2033      data-arc span      11598 days (31.75 yr)      first obs. used      1989-09-26      last obs. used      2021-06-28      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49361      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 04:24:14   Additional Information  Earth MOID = 2.02502 au   Jupiter MOID = 1.6707 au   T_jup = 3.093  [ 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-Jul-31 00:41 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin