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78421 (2002 QE41)
Classification: Main-belt Asteroid          SPK-ID: 2078421
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1137247333966129 6.8479e-08  
a 3.017908227876879 2.3732e-08 au
q 2.674697419246137 2.0709e-07 au
i 9.597335851070566 6.9728e-06 deg
node 340.4906745259355 2.7373e-05 deg
peri 347.5298647850436 3.3952e-05 deg
M 168.964163539645 2.133e-05 deg
tp 2458301.727920704693
(2018-Jul-02.22792070)
0.00011219 TDB
period 1914.950139532944
5.24
2.2588e-05
6.184e-08
d
yr
n .1879944509092043 2.2175e-09 deg/d
Q 3.361119036507622 2.6431e-08 au
  Orbit Determination Parameters
   # obs. used (total)      651  
   data-arc span      10390 days (28.45 yr)  
   first obs. used      1992-10-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:36:43  

Additional Information
 Earth MOID = 1.66269 au 
 Jupiter MOID = 1.99772 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457529.5 (2016-May-21.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1132163169558908 6.8643e-08  
q 2.679347470182968 2.0689e-07 au
tp 2458295.719575473848
(2018-Jun-26.21957547)
0.00011324 TDB
node 340.5833486676109 2.7305e-05 deg
peri 346.1277734221565 3.4e-05 deg
i 9.608487928351561 6.9783e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      651  
   data-arc span      10390 days (28.45 yr)  
   first obs. used      1992-10-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 13:36:43  

Additional Information
 Jupiter MOID = 1.99772 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.711832657325021E-15 -1.412711201377156E-14 2.010940943811137E-12 4.620021270620487E-15 2.540606588117855E-13 6.089803621026985E-15
q -1.412711201377156E-14 4.280308216817626E-14 -5.813392803792431E-12 -1.486280623704887E-14 -7.626853744271322E-13 -1.817705180851629E-14
tp 2.010940943811137E-12 -5.813392803792431E-12 1.282222514005901E-8 -1.144926659790405E-11 2.295975551978073E-9 -2.326919538697901E-12
node 4.620021270620487E-15 -1.486280623704887E-14 -1.144926659790405E-11 7.45565138602435E-10 -7.36930539340229E-10 -1.594075690269632E-11
peri 2.540606588117855E-13 -7.626853744271322E-13 2.295975551978073E-9 -7.36930539340229E-10 1.156017998873783E-9 1.516076506204705E-11
i 6.089803621026985E-15 -1.817705180851629E-14 -2.326919538697901E-12 -1.594075690269632E-11 1.516076506204705E-11 4.869692414930951E-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 14.63   n/a E2020-QM9  

78421 (2002 QE41)          Discovered 2002-Aug-29 by NEAT at Palomar
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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