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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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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1137247318963397 6.8992e-08  
a 3.017908230506693 2.4587e-08 au
q 2.674697426104562 2.0851e-07 au
i 9.597335851434169 7.0422e-06 deg
node 340.4906705145066 2.8747e-05 deg
peri 347.5298659630274 3.5647e-05 deg
M 168.9641654008595 2.1785e-05 deg
tp 2458301.727909629535
(2018-Jul-02.22790963)
0.00011527 TDB
period 1914.950142035984
5.24
2.3402e-05
6.407e-08
d
yr
n .187994450663476 2.2974e-09 deg/d
Q 3.361119034908823 2.7383e-08 au
  Orbit Determination Parameters
   # obs. used (total)      582  
   data-arc span      10334 days (28.29 yr)  
   first obs. used      1992-10-03  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55106  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 07:15:03  

Additional Information
 Earth MOID = 1.66269 au 
 Jupiter MOID = 1.99772 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457392.5 (2016-Jan-05.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1136133865003474 6.9405e-08  
q 2.677877454911876 2.0953e-07 au
tp 2458293.433284518288
(2018-Jun-23.93328452)
0.00011587 TDB
node 340.587077467787 2.8653e-05 deg
peri 345.8086121834256 3.5615e-05 deg
i 9.614163253913548 7.0503e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      582  
   data-arc span      10334 days (28.29 yr)  
   first obs. used      1992-10-03  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55106  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 07:15:03  

Additional Information
 Jupiter MOID = 1.99772 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.817053120383648E-15 -1.446422495780121E-14 1.921859237656221E-12 6.556553981302935E-15 2.333067538466931E-13 6.441426764625076E-15
q -1.446422495780121E-14 4.390396780666203E-14 -5.654158618271133E-12 -2.136490111189121E-14 -7.247778499318021E-13 -1.877230219848553E-14
tp 1.921859237656221E-12 -5.654158618271133E-12 1.342589516073264E-8 -1.468225323743313E-11 2.453321249126651E-9 -2.79782033419123E-12
node 6.556553981302935E-15 -2.136490111189121E-14 -1.468225323743313E-11 8.209916282040833E-10 -8.11589979840349E-10 -1.218751797336014E-11
peri 2.333067538466931E-13 -7.247778499318021E-13 2.453321249126651E-9 -8.11589979840349E-10 1.268400276783162E-9 1.128273118320917E-11
i 6.441426764625076E-15 -1.877230219848553E-14 -2.79782033419123E-12 -1.218751797336014E-11 1.128273118320917E-11 4.970661342302303E-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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