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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 ]

[ hide orbit diagram ]

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.


:
Orbital Elements at Epoch 2457931.5 (2017-Jun-27.0) TDB
Reference: JPL K202/11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3396456148119091 7.057e-07  
a 3.531948266738769 6.7911e-07 au
q 2.332337526198423 2.9338e-06 au
i 3.427132554623115 1.3107e-05 deg
node 5.00362962736593 0.00023042 deg
peri 98.00968589465538 0.00050376 deg
M 207.38078120853 0.00023453 deg
tp 2458959.342693290545
(2020-Apr-19.84269329)
0.0014941 TDB
period 2424.487377898156
6.64
0.00069925
1.914e-06
d
yr
n .148484996573623 4.2825e-08 deg/d
Q 4.731559007279115 9.0976e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 2.466510374430944E-8 4.008E-9
A2 [EST] 1.563291919585549E-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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .80584  
   source      ORB  
   producer      Javier Roa  
   solution date      2021-May-04 16:40:00  

Additional Information
 Earth MOID = 1.35056 au 
 Jupiter MOID = .525826 au 
 T_jup = 3.020 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A2 A1
e 4.980113634117899E-13 -2.069440705028588E-12 6.263135533985073E-11 -9.11144759235019E-12 8.51375874784289E-11 -1.284121113185658E-12 5.180024871065261E-16 1.704308234998159E-15
q -2.069440705028588E-12 8.606901072249077E-12 -3.53183126567549E-10 3.964426339383697E-11 -3.813979016410284E-10 5.280707343776048E-12 -2.431204812214606E-15 -7.179298345219313E-15
tp 6.263135533985073E-11 -3.53183126567549E-10 2.232441897593795E-6 -4.083181047967847E-8 6.553322530847758E-7 1.377478927070156E-9 7.189823641807664E-12 2.596882172984801E-12
node -9.11144759235019E-12 3.964426339383697E-11 -4.083181047967847E-8 5.309423567648042E-8 -6.524260934448169E-8 8.452062109943422E-10 -1.146457250685887E-13 -6.019598463830039E-14
peri 8.51375874784289E-11 -3.813979016410284E-10 6.553322530847758E-7 -6.524260934448169E-8 2.537699452187519E-7 -6.257025042084174E-10 2.088616698391684E-12 9.416070444039285E-13
i -1.284121113185658E-12 5.280707343776048E-12 1.377478927070156E-9 8.452062109943422E-10 -6.257025042084174E-10 1.717860730716168E-10 4.911893055531042E-15 -1.915818092086076E-15
A2 5.180024871065261E-16 -2.431204812214606E-15 7.189823641807664E-12 -1.146457250685887E-13 2.088616698391684E-12 4.911893055531042E-15 4.226224780858658E-17 2.132675297536196E-17
A1 1.704308234998159E-15 -7.179298345219313E-15 2.596882172984801E-12 -6.019598463830039E-14 9.416070444039285E-13 -1.915818092086076E-15 2.132675297536196E-17 1.606190510688463E-17

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 11.0   0.7 K202/11 2 parameter fit from 407 observations, autocmod 2.9c
comet total magnitude slope K1 16.25   n/a K202/11 autocmod 2.9c
comet nuclear magnitude M2 15.9   0.5 K202/11 from 85 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a K202/11 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a K202/11 autocmod 2.9c

[ 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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