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C/2018 N2 (ASASSN)
Classification: Hyperbolic Comet          SPK-ID: 1003580
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458784.5 (2019-Oct-28.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 1.000146536158285 2.4504e-06  
a -21323.29365068322 356.56 au
q 3.124633533555804 1.3221e-06 au
i 77.53234751611974 1.0276e-05 deg
node 25.2594253631368 6.0562e-06 deg
peri 24.39577819969661 4.9589e-05 deg
M -4.419106447020492E-6 1.1084e-07 deg
tp 2458798.460848707292
(2019-Nov-10.96084871)
0.00019522 TDB
period n/a
n/a
n/a
n/a
d
yr
n 3.165356590901465E-7 7.9395e-09 deg/d
Q n/a n/a au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.046792600162577E-8 9.37E-10
A2 [EST] -8.002281184919964E-9 1.535E-9
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)      3695  
   data-arc span      898 days (2.46 yr)  
   first obs. used      2018-07-07  
   last obs. used      2020-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   norm. resid. RMS      .36418  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-14 17:12:59  

Additional Information
 Earth MOID = 2.19547 au 
 Jupiter MOID = 1.63659 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 39 2 parameter fit from 2374 observations, autocmod 2.8
comet total magnitude slope K1 4.5   n/a 39 autocmod 2.8
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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