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P/2016 A2 (Christensen)
Classification: Jupiter-family Comet          SPK-ID: 1003433
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457395.5 (2016-Jan-08.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2739123221061038 0.0034306  
a 4.746618237288152 0.011121 au
q 3.446461013761374 0.02085 au
i 26.77971715744011 0.46098 deg
node 291.7378670535985 0.08319 deg
peri 139.8760602653328 1.0603 deg
M 19.53904704761513 0.72498 deg
tp 2457190.489662771874
(2015-Jun-16.98966277)
8.3226 TDB
period 3777.242627149188
10.34
13.275
0.03634
d
yr
n .09530761868789564 0.00033496 deg/d
Q 6.046775460814931 0.014168 au
  Orbit Determination Parameters
   # obs. used (total)      49  
   data-arc span      15 days  
   first obs. used      2016-01-02  
   last obs. used      2016-01-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .65008  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:33:21  

Additional Information
 Earth MOID = 2.50889 au 
 Jupiter MOID = .3673 au 
 T_jup = 2.736 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 1.176898123513844E-5 -6.685381888614365E-5 .01370704015978293 .0002282196039944726 .0009274200400345775 -.001265096039765647
q -6.685381888614365E-5 .0004347056249463406 -.1318713477331527 -.001666390649350001 -.01284871184267905 .009235244153249188
tp .01370704015978293 -.1318713477331527 69.2653809413887 .6303293968675419 8.564966470365288 -3.492044184937529
node .0002282196039944726 -.001666390649350001 .6303293968675419 .00692055566661065 .06916241435914655 -.03834851135383313
peri .0009274200400345775 -.01284871184267905 8.564966470365288 .06916241435914655 1.124202025737883 -.3830982495263298
i -.001265096039765647 .009235244153249188 -3.492044184937529 -.03834851135383313 -.3830982495263298 .2124989054187607

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.1   0.6 8 from 27 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 8 autocmod 2.9c
comet nuclear magnitude M2 15.3   0.5 8 from 8 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.9c

Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2015.5   P/2016 A2       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters ]
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