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P/2012 U2 (PANSTARRS)
Classification: Jupiter-family Comet          SPK-ID: 1003217
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456245.5 (2012-Nov-14.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5065728830902068 4.9255e-05  
a 7.352227442026443 0.00055671 AU
q 3.627788389584172 0.00016978 AU
i 10.53447147533979 0.00091894 deg
node 186.8630432267244 0.0047368 deg
peri 229.5372803155958 0.082042 deg
M 358.9972236242315 0.021793 deg
tp 2456265.782823914820
(2012-Dec-04.28282391)
0.44233 JED
period 7281.600151120022
19.94
0.82704
0.002264
d
yr
n .04943968255996952 5.6153e-06 deg/d
Q 11.07666649446871 0.00083872 AU
  Orbit Determination Parameters
   # obs. used (total)      36  
   data-arc span      106 days  
   first obs. used      2012-10-20  
   last obs. used      2013-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      4  
   fit RMS      .32224  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Oct-22 15:37:36  

Additional Information
 Earth MOID = 2.65192 AU 
 T_jup = 2.723 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 12.1 mag 0.6 8 from 19 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 10.   n/a 8 autocmod 2.5c
comet nuclear magnitude M2 15.1 mag 0.3 8 from 8 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 8 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 8 autocmod 2.5c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2012.9   P/2012 U2       
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
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