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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 2457911.5 (2017-Jun-07.0) TDB
Reference: JPL K202/10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3396599586595322 7.0575e-07  
a 3.531896517890754 6.7918e-07 au
q 2.332252692634235 2.9339e-06 au
i 3.427138884757729 1.3107e-05 deg
node 5.003364787376848 0.00023043 deg
peri 98.01227481420895 0.00050375 deg
M 204.4074212462069 0.00023483 deg
tp 2458959.344313069061
(2020-Apr-19.84431307)
0.0014938 TDB
period 2424.43409400505
6.64
0.00069932
1.915e-06
d
yr
n .1484882599573153 4.2831e-08 deg/d
Q 4.731540343147273 9.0987e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.466527485682364E-8 4.008E-9
A2 [EST] 1.563255325518051E-8 6.501E-9
  Orbit Determination Parameters
   # obs. used (total)      520  
   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      .80584  
   source      ORB  
   producer      Javier Roa  
   solution date      2021-Mar-19 14:59:06  

Additional Information
 Earth MOID = 1.35321 au 
 Jupiter MOID = .525977 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 11.9   0.7 K202/10 2 parameter fit from 400 observations, autocmod 2.9b
comet total magnitude slope K1 14.   n/a K202/10 autocmod 2.9b
comet nuclear magnitude M2 15.9   0.5 K202/10 from 85 observations, autocmod 2.9b
comet nuclear magnitude slope K2 5.   n/a K202/10 autocmod 2.9b
comet nuclear phase coefficient PC 0.03   n/a K202/10 autocmod 2.9b

[ 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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