+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   46548 (1989 SK1) Classification: Main-belt Asteroid          SPK-ID: 2046548 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .221823439570132 4.7752e-08   a 2.679863698980834 1.5135e-08 au q 2.085407115693769 1.3527e-07 au i 4.608253318228087 3.8924e-06 deg node 56.887806575679 5.1491e-05 deg peri 279.0086121081656 5.2345e-05 deg M 19.73749721985226 9.6787e-06 deg tp 2458912.646904845616 (2020-Mar-04.14690485) 4.2708e-05 TDB period 1602.387268420604 4.39 1.3575e-05 3.717e-08 d yr n .2246647905252234 1.9033e-09 deg/d Q 3.2743202822679 1.8493e-08 au   Orbit Determination Parameters    # obs. used (total)      836      data-arc span      10920 days (29.90 yr)      first obs. used      1989-09-26      last obs. used      2019-08-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52329      source      ORB      producer      Otto Matic      solution date      2019-Sep-24 02:11:43   Additional Information  Earth MOID = 1.08203 au   Jupiter MOID = 2.12937 au   T_jup = 3.337  [ hide covariance matrix ] Orbital Elements at Epoch 2456857.5 (2014-Jul-19.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2232770827645461 4.7687e-08   q 2.080756377448279 1.3523e-07 au tp 2457312.147025652384 (2015-Oct-16.64702565) 3.779e-05 TDB node 56.90640351672487 5.1458e-05 deg peri 279.4399209687608 5.2303e-05 deg i 4.611576657329612 3.8934e-06 deg   Orbit Determination Parameters    # obs. used (total)      836      data-arc span      10920 days (29.90 yr)      first obs. used      1989-09-26      last obs. used      2019-08-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52329      source      ORB      producer      Otto Matic      solution date      2019-Sep-24 02:11:43   Additional Information  Jupiter MOID = 2.12937 au   T_jup = 3.337  Orbit Covariance (6×6)   e q tp node peri i e 2.274028269512159E-15 -6.432699368618355E-15 -3.108417111339246E-13 1.49744939128816E-14 2.224175329097824E-14 -4.462870069239961E-15 q -6.432699368618355E-15 1.828610063689011E-14 9.158492728401227E-13 -4.435804502311393E-14 -5.827339291266737E-14 1.286329129133733E-14 tp -3.108417111339246E-13 9.158492728401227E-13 1.428078608551859E-9 -1.455382575283523E-11 3.629420633546212E-10 1.65822465327973E-12 node 1.49744939128816E-14 -4.435804502311393E-14 -1.455382575283523E-11 2.647906946458205E-9 -2.64191419392558E-9 2.387361197534681E-11 peri 2.224175329097824E-14 -5.827339291266737E-14 3.629420633546212E-10 -2.64191419392558E-9 2.735595375403362E-9 -2.361332170546915E-11 i -4.462870069239961E-15 1.286329129133733E-14 1.65822465327973E-12 2.387361197534681E-11 -2.361332170546915E-11 1.51587479648884E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.9   n/a MPO436107   diameter diameter 5.881 km 0.112 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.063   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   46548 (1989 SK1)          Discovered 1989-Sep-26 by Elst, E. W. at La Silla Reference: 20020921/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1989 SK1 = 1998 UN24  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Jul-10 13:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin