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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 ]

[ 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 .1136518137436199 6.9083e-08  
a 3.017894298799749 2.5495e-08 au
q 2.674905138054627 2.0853e-07 au
i 9.596439241233055 7.113e-06 deg
node 340.4949659756944 2.9957e-05 deg
peri 347.4617943951823 3.7357e-05 deg
M 131.447258074911 2.2357e-05 deg
tp 2458301.296659671984
(2018-Jul-01.79665967)
0.00011911 TDB
period 1914.936881944209
5.24
2.4266e-05
6.644e-08
d
yr
n .1879957524419797 2.3823e-09 deg/d
Q 3.36088345954487 2.8393e-08 au
  Orbit Determination Parameters
   # obs. used (total)      570  
   data-arc span      10269 days (28.11 yr)  
   first obs. used      1992-10-03  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5536  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:31  

Additional Information
 Earth MOID = 1.66483 au 
 Jupiter MOID = 1.99772 au 
 T_jup = 3.216 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457229.5 (2015-Jul-26.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .11450418114082 6.9736e-08  
q 2.67296054643066 2.105e-07 au
tp 2456374.516641543203
(2013-Mar-23.01664154)
0.00012077 TDB
node 340.5858047198934 2.9867e-05 deg
peri 345.491486265988 3.717e-05 deg
i 9.615482950912376 7.1209e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      570  
   data-arc span      10269 days (28.11 yr)  
   first obs. used      1992-10-03  
   last obs. used      2020-11-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5536  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 22:06:31  

Additional Information
 Jupiter MOID = 1.99772 au 
 T_jup = 3.216 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.863075613126411E-15 -1.459656744933703E-14 1.699811045323052E-12 1.684921808204747E-15 2.093878325539382E-13 6.086153415386957E-15
q -1.459656744933703E-14 4.430861530943695E-14 -5.676165482847425E-12 -7.520898622792915E-15 -6.887974941082206E-13 -1.742411581092231E-14
tp 1.699811045323052E-12 -5.676165482847425E-12 1.458433989522204E-8 -1.730569810576525E-11 2.679023252699961E-9 -5.669120599972248E-12
node 1.684921808204747E-15 -7.520898622792915E-15 -1.730569810576525E-11 8.920246394029083E-10 -8.823226109650906E-10 -4.28235395078513E-12
peri 2.093878325539382E-13 -6.887974941082206E-13 2.679023252699961E-9 -8.823226109650906E-10 1.381593293222274E-9 3.076258411006687E-12
i 6.086153415386957E-15 -1.742411581092231E-14 -5.669120599972248E-12 -4.28235395078513E-12 3.076258411006687E-12 5.070703100166282E-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 14.7   n/a MPO319984  

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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