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85756 (1998 SD157)
Classification: Main-belt Asteroid          SPK-ID: 2085756
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09549540291942703 4.4706e-08  
a 2.84200859172932 1.5152e-08 au
q 2.570609836161655 1.3062e-07 au
i 1.988230418804676 4.6773e-06 deg
node 20.00889371043829 0.00010578 deg
peri 340.763473608476 0.00010724 deg
M 198.3514995523651 1.8517e-05 deg
tp 2459786.288531532134
(2022-Jul-25.78853153)
9.206e-05 TDB
period 1749.993786321618
4.79
1.3995e-05
3.832e-08
d
yr
n .2057150161411136 1.6451e-09 deg/d
Q 3.113407347296985 1.6599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      7886 days (21.59 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56433  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:40:11  

Additional Information
 Earth MOID = 1.56748 au 
 Jupiter MOID = 2.31557 au 
 T_jup = 3.301 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457035.5 (2015-Jan-13.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09352094577502988 4.4575e-08  
q 2.579002508896806 1.3008e-07 au
tp 2456285.906379682697
(2012-Dec-24.40637968)
8.8618e-05 TDB
node 20.04078650115239 0.0001058 deg
peri 341.1280800684677 0.00010734 deg
i 1.987881021844113 4.6739e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      950  
   data-arc span      7886 days (21.59 yr)  
   first obs. used      1998-09-26  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56433  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 15:40:11  

Additional Information
 Jupiter MOID = 2.31557 au 
 T_jup = 3.301 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.986910453637543E-15 -5.767165913201322E-15 -2.720216595468826E-13 -6.219943246748723E-15 -7.928496377317174E-14 3.561749560123246E-17
q -5.767165913201322E-15 1.692036943068906E-14 8.138046369980753E-13 1.68986990078453E-14 2.50435430147924E-13 -6.235548520263385E-17
tp -2.720216595468826E-13 8.138046369980753E-13 7.853163289959759E-9 6.606425986596148E-12 1.615241708269251E-9 -6.584605185334114E-13
node -6.219943246748723E-15 1.68986990078453E-14 6.606425986596148E-12 1.119375981908421E-8 -1.118530443184009E-8 -1.319170693995593E-10
peri -7.928496377317174E-14 2.50435430147924E-13 1.615241708269251E-9 -1.118530443184009E-8 1.152128907046494E-8 1.317075462225876E-10
i 3.561749560123246E-17 -6.235548520263385E-17 -6.584605185334114E-13 -1.319170693995593E-10 1.317075462225876E-10 2.184575873385157E-11

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 14.9   n/a MPO337904  

85756 (1998 SD157)          Discovered 1998-Sep-26 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 SD157 = 2001 FN192 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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