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C/2021 C6 (Lemmon)
Classification: Hyperbolic Comet          SPK-ID: 1003770
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459282.5 (2021-Mar-09.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.00211114422968 0.00031169  
a -1549.502874455632 228.65 au
q 3.271224052279505 0.00026765 au
i 164.6257573827696 0.00072889 deg
node 332.1551359512134 0.0015718 deg
peri 203.5705532721082 0.012015 deg
M -.004029340439460667 0.00089106 deg
tp 2459531.855222187683
(2021-Nov-13.35522219)
0.049487 TDB
period n/a
n/a
n/a
n/a
d
yr
n 1.615903771378764E-5 3.5766e-06 deg/d
Q n/a n/a au
  Orbit Determination Parameters
   # obs. used (total)      149  
   data-arc span      109 days  
   first obs. used      2021-01-23  
   last obs. used      2021-05-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .51564  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-31 22:43:00  

Additional Information
 Earth MOID = 2.29368 au 
 Jupiter MOID = 1.02446 au 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 9.714919087675857E-8 8.04209061057965E-8 -1.527201486165667E-5 -4.578717870317071E-7 -3.656911717885831E-6 2.094959633156582E-7
q 8.04209061057965E-8 7.163766055374492E-8 -1.313093324261913E-5 -3.936131367125055E-7 -3.207835803048917E-6 1.801120245946838E-7
tp -1.527201486165667E-5 -1.313093324261913E-5 .002449002311496306 7.332342432500034E-5 .0005924026834777682 -3.355052485470948E-5
node -4.578717870317071E-7 -3.936131367125055E-7 7.332342432500034E-5 2.470601700203501E-6 1.80068485151784E-5 -1.143326318821546E-6
peri -3.656911717885831E-6 -3.207835803048917E-6 .0005924026834777682 1.80068485151784E-5 .0001443541251298156 -8.2519663938501E-6
i 2.094959633156582E-7 1.801120245946838E-7 -3.355052485470948E-5 -1.143326318821546E-6 -8.2519663938501E-6 5.312820493526502E-7

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 15.4   0.5 4 2 parameter fit from 125 observations, autocmod 2.9c
comet total magnitude slope K1 4.5   n/a 4 autocmod 2.9c
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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