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266P/Christensen
Classification: Encke-type Comet          SPK-ID: 1002425
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2457834.5 (2017-Mar-22.0) TDB
Reference: JPL K202/9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3397519045893235 7.0906e-07  
a 3.53161994943559 6.7955e-07 au
q 2.331745345329198 2.945e-06 au
i 3.427138610233652 1.4073e-05 deg
node 5.003312875776307 0.00027212 deg
peri 98.01976052295954 0.00054189 deg
M 192.9615989648631 0.00023858 deg
tp 2458959.294521265649
(2020-Apr-19.79452127)
0.001512 TDB
period 2424.14932821619
6.64
0.00069968
1.916e-06
d
yr
n .1485057029324617 4.2863e-08 deg/d
Q 4.731494553541982 9.1043e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.772373973052434E-8 4.087E-9
A2 [EST] 2.532121407378965E-9 6.565E-9
A3 [EST] 9.552846039614861E-9 7.279E-10
  Orbit Determination Parameters
   # obs. used (total)      485  
   data-arc span      2801 days (7.67 yr)  
   first obs. used      2012-08-15  
   last obs. used      2020-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .70687  
   source      ORB  
   producer      Javier Roa  
   solution date      2020-Apr-21 19:18:25  

Additional Information
 Earth MOID = 1.35155 au 
 Jupiter MOID = .526596 au 
 T_jup = 3.020 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.0   0.7 K202/9 2 parameter fit from 361 observations, autocmod 2.8
comet total magnitude slope K1 13.75   n/a K202/9 autocmod 2.8
comet nuclear magnitude M2 15.9   0.5 K202/9 from 85 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a K202/9 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a K202/9 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2013.7   266P/2012 P1       
 2007.0   266P/2006 U5       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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