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C/1988 A1 (Liller)
Classification: Comet          SPK-ID: 1001222
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2447277.5 (1988-Apr-26.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9965633764274857 1.0581e-05  
a 244.8147107263901 0.75387 au
q .8413360057805781 1.1677e-06 au
i 73.3223550230319 9.231e-05 deg
node 31.51534902334489 0.00020519 deg
peri 57.38793426969628 0.00013647 deg
M .006660363657289767 3.0789e-05 deg
tp 2447251.614882869681
(1988-Mar-31.11488287)
0.00013652 TDB
period 1399119.124181093
3830.58
6462.6
17.69
d
yr
n .0002573047525247063 1.1885e-06 deg/d
Q 488.7880854469996 1.5052 au
  Orbit Determination Parameters
   # obs. used (total)      427  
   data-arc span      184 days  
   first obs. used      1988-01-12  
   last obs. used      1988-07-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   norm. resid. RMS      .49081  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:36  

Additional Information
 Earth MOID = .0856922 au 
 Jupiter MOID = 1.01258 au 
 T_jup = 0.347 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 6.6   0.5 2 2 parameter fit from 7 observations, autocmod 2.9c
comet total magnitude slope K1 9.   n/a 2 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1988.2   C/1988 A1       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ]
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