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JPL Small-Body Database Browser
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C/2019 U6 (Lemmon)
Classification: Comet          SPK-ID: 1003663
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

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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.


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Orbital Elements at Epoch 2458820.5 (2019-Dec-03.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9979236330031132 1.6865e-06  
a 440.324776197959 0.35781 au
q .9142758332090291 1.8373e-06 au
i 61.00330333358883 5.1876e-05 deg
node 235.7080741244486 3.4375e-05 deg
peri 329.6562704583416 9.9973e-05 deg
M 359.9787918156966 2.5867e-05 deg
tp 2459019.319555951893
(2020-Jun-18.81955595)
0.0002847 TDB
period 3374878.260143519
9239.91
4113.6
11.26
d
yr
n .0001066705143861073 1.3002e-07 deg/d
Q 879.7352765627089 0.71487 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      561 days (1.54 yr)  
   first obs. used      2018-11-06  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .56613  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-27 09:35:25  

Additional Information
 Earth MOID = .0288544 au 
 Jupiter MOID = 1.40978 au 
 T_jup = 0.586 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.264   1.1149 8 autocmod 2.8
comet total magnitude M1 11.4   0.9 10 2 parameter fit from 308 observations, autocmod 2.8
comet total magnitude slope K1 11.5   n/a 10 autocmod 2.8
comet nuclear magnitude M2 13.1   0.3 10 from 39 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 10 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 10 autocmod 2.8

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.5   C/2019 U6       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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