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136998 (1998 SG75)
Classification: Main-belt Asteroid          SPK-ID: 2136998
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .170163639948623 7.221e-08  
a 2.521375559871285 9.9803e-09 au
q 2.09232911692609 1.8236e-07 au
i 3.498613770929164 3.9006e-06 deg
node 127.9756774607643 8.9534e-05 deg
peri 244.5401558973502 9.0077e-05 deg
M 151.9052887456811 1.039e-05 deg
tp 2458383.443219504829
(2018-Sep-21.94321950)
4.0597e-05 TDB
period 1462.361467546847
4.00
8.6827e-06
2.377e-08
d
yr
n .2461771648044791 1.4617e-09 deg/d
Q 2.95042200281648 1.1679e-08 au
  Orbit Determination Parameters
   # obs. used (total)      554  
   data-arc span      10773 days (29.49 yr)  
   first obs. used      1990-10-19  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55875  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 22:42:24  

Additional Information
 Earth MOID = 1.09532 au 
 Jupiter MOID = 2.51589 au 
 T_jup = 3.433 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457085.5 (2015-Mar-04.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1688992890267739 7.224e-08  
q 2.095736857756685 1.8228e-07 au
tp 2456916.767709873115
(2014-Sep-16.26770987)
3.8412e-05 TDB
node 128.056612875294 8.9392e-05 deg
peri 243.7751931688583 8.9951e-05 deg
i 3.50035616349719 3.9039e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      554  
   data-arc span      10773 days (29.49 yr)  
   first obs. used      1990-10-19  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55875  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 22:42:24  

Additional Information
 Jupiter MOID = 2.51589 au 
 T_jup = 3.433 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.218589896848602E-15 -1.315385751349767E-14 -5.30625627370209E-13 -4.410401440540659E-14 -2.575674385189835E-13 -1.221254930636722E-14
q -1.315385751349767E-14 3.32243189627702E-14 1.409129985939391E-12 1.116737484981717E-13 6.685783735990966E-13 3.088626117301409E-14
tp -5.30625627370209E-13 1.409129985939391E-12 1.475478792415316E-9 1.623950902560214E-11 4.21122639327996E-10 1.212343836977108E-12
node -4.410401440540659E-14 1.116737484981717E-13 1.623950902560214E-11 7.99096854335286E-9 -7.970268427726254E-9 1.780589211547939E-10
peri -2.575674385189835E-13 6.685783735990966E-13 4.21122639327996E-10 -7.970268427726254E-9 8.091206506335539E-9 -1.770345085097557E-10
i -1.221254930636722E-14 3.088626117301409E-14 1.212343836977108E-12 1.780589211547939E-10 -1.770345085097557E-10 1.524062496136519E-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 16.3   n/a MPO412867  

136998 (1998 SG75)          Discovered 1998-Sep-21 by Elst, E. W. at La Silla
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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