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JPL Small-Body Database Browser
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12P/Pons-Brooks
Classification: Halley-type Comet* [NEO]          SPK-ID: 1000068
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 2435000.5 (1954-Sep-15.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.9548123941619716115170 3.0452e-08  
a 17.121223241407509618738 1.546e-05 au
q 0.7736670872976132429243 7.9e-07 au
i 74.176894232522556649200 4.0465e-05 deg
node 255.8911443583019 8.6118e-05 deg
peri 199.028468565403 0.00015453 deg
M 1.601583044410965 6.1764e-06 deg
tp 2434885.380850198988
(1954-May-22.88085020)
0.00033916 TDB
period 25876.20671496702
70.85
0.035049
9.596e-05
d
yr
n .01391239465527121 1.8844e-08 deg/d
Q 33.4687793955174 3.0222e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -1.021678908475834E-9 2.949E-10
A2 [EST] -2.705135237076094E-10 8.372E-14
  Orbit Determination Parameters
   # obs. used (total)      278  
   data-arc span      51861 days (141.99 yr)  
   first obs. used      1812-08-26  
   last obs. used      1954-08-23  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   norm. resid. RMS      1.1877  
   source      ORB  
   producer      M.S.W. Keesey  
   solution date      2001-Nov-05 15:37:25  

Additional Information
 Earth MOID = .1873 au 
 T_jup = 0.598 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 5.   n/a MPC data tape  
comet total magnitude slope K1 15.0   n/a MPC data tape  
comet nuclear magnitude M2 11.   n/a MPC data tape  
comet nuclear magnitude slope K2 10.0   n/a MPC data tape  

12P/Pons-Brooks          Discovered 1812-Jul-21 by Pons, Jean Louis at Marseilles, France
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1954.4   12P/1953 M1   1954 VII   1953c 
 1883.5   12P/1883 R1   1884 I   1883b 
 1812.7   12P/1812 O1   1812    
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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