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

[ show orbit diagram ]
Orbital Elements at Epoch 2456245.5 (2012-Nov-14.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5065687344688919 4.923e-05  
a 7.352158886121392 0.0005565 au
q 3.62778506356466 0.00016973 au
i 10.53447533300739 0.00091894 deg
node 186.8630689771828 0.0047368 deg
peri 229.534875779256 0.082044 deg
M 358.9978832463022 0.021793 deg
tp 2456265.769198455029
(2012-Dec-04.26919845)
0.44233 TDB
period 7281.498305346991
19.94
0.82673
0.002263
d
yr
n .04944037406911744 5.6134e-06 deg/d
Q 11.07653270867812 0.00083841 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.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .32397  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:32:26  

Additional Information
 Earth MOID = 2.65192 au 
 Jupiter MOID = .506119 au 
 T_jup = 2.723 
[ 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 12.1   0.6 10 from 19 observations, assumed slope, autocmod 2.9c
comet total magnitude slope K1 10.   n/a 10 autocmod 2.9c
comet nuclear magnitude M2 15.1   0.3 10 from 8 observations, autocmod 2.9c
comet nuclear magnitude slope K2 5.   n/a 10 autocmod 2.9c
comet nuclear phase coefficient PC 0.03   n/a 10 autocmod 2.9c

[ 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 | Mission Design | Physical Parameters | Close-Approach Data ]
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