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C/1989 A3 (Bradfield)
Classification: Halley-type Comet* [NEO]          SPK-ID: 1001234
Ephemeris | Orbit Diagram | Orbital Elements ]

[ show orbit diagram ]
Orbital Elements at Epoch 2447551.5 (1989-Jan-25.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9780924999204414 0.00062319  
a 19.19513367253992 0.56439 au
q .4205173924583054 0.00040601 au
i 83.05927426289587 0.015376 deg
node 28.4378141110794 0.0074523 deg
peri 194.7699836737965 0.056989 deg
M .5948415122684078 0.026253 deg
tp 2447500.744406973560
(1988-Dec-05.24440697)
0.0026772 TDB
period 30717.4484508297
84.10
1354.8
3.709
d
yr
n .01171972341961483 0.00051689 deg/d
Q 37.96974995262154 1.1164 au
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      53 days  
   first obs. used      1989-01-07  
   last obs. used      1989-03-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .99111  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:29:36  

Additional Information
 Earth MOID = .573084 au 
 Jupiter MOID = 1.31866 au 
 T_jup = 0.368 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements ]

no physical parameters available

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1988.9   C/1989 A3       
Ephemeris | Orbit Diagram | Orbital Elements ]
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