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C/2018 N2 (ASASSN)
Classification: Hyperbolic Comet          SPK-ID: 1003580
Ephemeris | Orbit Diagram | Orbital Elements | 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 2458739.5 (2019-Sep-13.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000151475979212 2.9465e-06  
a -20627.90472091274 401.25 au
q 3.124632066693266 1.5497e-06 au
i 77.53356798056178 1.4573e-05 deg
node 25.25977823909143 7.9538e-06 deg
peri 24.39643856172134 8.0324e-05 deg
M -1.961580569682707E-5 5.7235e-07 deg
tp 2458798.463703303603
(2019-Nov-10.96370330)
0.00031245 TDB
period n/a
n/a
n/a
n/a
d
yr
n 3.326759446540469E-7 9.7068e-09 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 6.669304748315443E-9 1.616E-9
A2 [EST] -1.226491978002398E-8 2.063E-9
A3 [EST] 1.210533421948845E-9 6.528E-10
ALN [SET] .0408373333128795 n/a
NK [SET] 2.6 n/a
NM [SET] 2. n/a
NN [SET] 3. n/a
R0 [SET] 5. n/a
  Orbit Determination Parameters
   # obs. used (total)      3355  
   data-arc span      755 days (2.07 yr)  
   first obs. used      2018-07-07  
   last obs. used      2020-07-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .34798  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-06 07:15:16  

Additional Information
 Earth MOID = 2.19573 au 
 Jupiter MOID = 1.63669 au 
 T_jup = 0.474 
 Nongrav. accels. using CO driven g(r) 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 9.6   0.8 30 2 parameter fit from 2138 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a 30 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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