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278P/McNaught
Classification: Jupiter-family Comet          SPK-ID: 1002397
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457121.5 (2015-Apr-09.0) TDB
Reference: JPL 45 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4333755505085099 9.0901e-07  
a 3.699828896375386 8.1749e-08 au
q 2.09641351162141 3.3993e-06 au
i 6.683529233349115 2.053e-05 deg
node 15.49228482497766 0.00010243 deg
peri 237.9290883725273 0.0003183 deg
M 85.11736762686438 9.2567e-05 deg
tp 2456506.908470905838
(2013-Aug-02.40847091)
0.00067298 TDB
period 2599.386666230352
7.12
8.6151e-05
2.359e-07
d
yr
n .138494208913549 4.5901e-09 deg/d
Q 5.303244281129362 1.1718e-07 au
  Orbit Determination Parameters
   # obs. used (total)      504  
   data-arc span      5231 days (14.32 yr)  
   first obs. used      2006-05-22  
   last obs. used      2020-09-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Oct-30 21:15:58  

Additional Information
 Earth MOID = 1.09147 au 
 Jupiter MOID = .396342 au 
 T_jup = 2.916 
[ 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 13.8   0.8 45 2 parameter fit from 430 observations, autocmod 2.8
comet total magnitude slope K1 10.25   n/a 45 autocmod 2.8
comet nuclear magnitude M2 17.2   0.9 45 from 48 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 45 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 45 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2013.6   278P/2013 B1       
 2006.5   278P/2006 K2       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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