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78611 (2002 SA55)
Classification: Main-belt Asteroid          SPK-ID: 2078611
[ 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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .172880062309014 4.1898e-08  
a 2.696271615422346 1.5637e-08 au
q 2.230140010546105 1.1962e-07 au
i 12.15441886143182 6.188e-06 deg
node 334.932762235458 1.9489e-05 deg
peri 116.8983756122081 2.7683e-05 deg
M 280.288514976748 1.7554e-05 deg
tp 2459358.565341350688
(2021-May-24.06534135)		 7.9077e-05 TDB
period 1617.126099816686
4.43		 1.4068e-05
3.852e-08		 d
yr
n .2226171478159983 1.9366e-09 deg/d
Q 3.162403220298588 1.8341e-08 au
   Orbit Determination Parameters
   # obs. used (total)      686  
   data-arc span      8038 days (22.01 yr)  
   first obs. used      1998-11-14  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49345  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:47  

Additional Information
 Earth MOID = 1.27619 au 
 Jupiter MOID = 2.07215 au 
 T_jup = 3.316 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457434.5 (2016-Feb-16.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1710754385347587 4.1277e-08  
q 2.236843763120634 1.1762e-07 au
tp 2457736.168062558606
(2016-Dec-13.66806256)		 8.1156e-05 TDB
node 335.1887650234789 1.9475e-05 deg
peri 115.9272442229915 2.8006e-05 deg
i 12.15084003287077 6.1897e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      686  
   data-arc span      8038 days (22.01 yr)  
   first obs. used      1998-11-14  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49345  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:47  

Additional Information
 Jupiter MOID = 2.07215 au 
 T_jup = 3.316 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.703776409738446E-15 -4.832046390226278E-15 7.393919644271498E-13 -1.758812439199452E-15 2.536078471930606E-13 -2.834801860127288E-15
q -4.832046390226278E-15 1.383536734888757E-14 -2.057085262434123E-12 6.470711762927504E-15 -7.188606330034525E-13 9.523384459522674E-15
tp 7.393919644271498E-13 -2.057085262434123E-12 6.58635515743679E-9 -1.033563084364514E-11 1.637979104413082E-9 1.501160346048505E-11
node -1.758812439199452E-15 6.470711762927504E-15 -1.033563084364514E-11 3.792576523801613E-10 -3.731015202007855E-10 2.625370838819663E-11
peri 2.536078471930606E-13 -7.188606330034525E-13 1.637979104413082E-9 -3.731015202007855E-10 7.843272475764792E-10 -2.239394104487419E-11
i -2.834801860127288E-15 9.523384459522674E-15 1.501160346048505E-11 2.625370838819663E-11 -2.239394104487419E-11 3.831285038185623E-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 15.3   n/a MPO436331  

78611 (2002 SA55)          Discovered 2002-Sep-30 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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