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78868 (2003 QE87)
Classification: Main-belt Asteroid          SPK-ID: 2078868
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ hide orbit diagram ]

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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05965950143970331 3.3965e-08  
a 2.426636009212579 1.2651e-08 au
q 2.281864114727326 8.0666e-08 au
i 5.168810474539283 4.3233e-06 deg
node 339.3539635389183 4.763e-05 deg
peri 50.59253877167775 6.3042e-05 deg
M 161.5930477490838 4.2423e-05 deg
tp 2458580.737128697732
(2019-Apr-07.23712870)		 0.00016158 TDB
period 1380.719262225075
3.78		 1.0798e-05
2.956e-08		 d
yr
n .2607336696526185 2.039e-09 deg/d
Q 2.571407903697833 1.3406e-08 au
   Orbit Determination Parameters
   # obs. used (total)      596  
   data-arc span      8346 days (22.85 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52394  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-23 21:00:50  

Additional Information
 Earth MOID = 1.28838 au 
 Jupiter MOID = 2.6612 au 
 T_jup = 3.502 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457082.5 (2015-Mar-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05898122568198505 3.3838e-08  
q 2.283907010608059 8.0334e-08 au
tp 2457195.232559204922
(2015-Jun-21.73255921)		 0.0001618 TDB
node 339.4270577129377 4.7558e-05 deg
peri 49.47331917724934 6.34e-05 deg
i 5.173549879760134 4.3257e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      596  
   data-arc span      8346 days (22.85 yr)  
   first obs. used      1998-03-20  
   last obs. used      2021-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52394  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-23 21:00:50  

Additional Information
 Jupiter MOID = 2.6612 au 
 T_jup = 3.502 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.145030335200902E-15 -2.689836816995954E-15 4.272474245473616E-13 1.850617009074717E-15 1.022328417963299E-13 -7.859372471890289E-16
q -2.689836816995954E-15 6.453558649486998E-15 -7.094679892854715E-13 -4.256276274507277E-15 -1.685060649223564E-13 1.914618374233106E-15
tp 4.272474245473616E-13 -7.094679892854715E-13 2.617870919440737E-8 4.58988178040584E-11 6.802560992228711E-9 -5.125687670191095E-12
node 1.850617009074717E-15 -4.256276274507277E-15 4.58988178040584E-11 2.26178929515156E-9 -2.240172228244776E-9 -4.992900575776247E-11
peri 1.022328417963299E-13 -1.685060649223564E-13 6.802560992228711E-9 -2.240172228244776E-9 4.019535885761231E-9 4.840748147380711E-11
i -7.859372471890289E-16 1.914618374233106E-15 -5.125687670191095E-12 -4.992900575776247E-11 4.840748147380711E-11 1.87114297877989E-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 15.97   n/a E2021B10  

78868 (2003 QE87)          Discovered 2003-Aug-25 by LINEAR at Socorro
Reference: 20040415/Numbers.arcLast Updated: 2004-04-19

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