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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 2439405.5 (1966-Oct-07.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .9542202409863804 1.3375e-07  
a 16.99481755725178 1.8461e-06 au
q .7780186522514184 2.3102e-06 au
i 74.7037493144222 0.00011761 deg
node 255.9595132752626 0.00016743 deg
peri 199.0936340963835 0.00011895 deg
M 63.58443906644973 1.3964e-05 deg
tp 2434885.675931168748
(1954-May-23.17593117)
0.00057586 TDB
period 25590.17093913168
70.06
0.0041697
1.142e-05
d
yr
n .01406790133822434 2.2922e-09 deg/d
Q 33.21161646225214 3.6077e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.962808270929297E-9 4.007E-10
A2 [EST] -2.711607195758214E-10 1.763E-13
  Orbit Determination Parameters
   # obs. used (total)      393  
   data-arc span      75909 days (207.83 yr)  
   first obs. used      1812-08-18  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54267  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Jun-29 10:49:26  

Additional Information
 Earth MOID = .183538 au 
 Jupiter MOID = 2.00157 au 
 T_jup = 0.591 
[ 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 
 1884.3   12P/1883 R1   1884 I   1883b 
 1814.3   12P/1812 O1   1812    
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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