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326P/Hill
Classification: Jupiter-family Comet          SPK-ID: 1002486
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456125.5 (2012-Jul-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3182112079161584 9.2428e-07  
a 4.072726914735172 1.6927e-07 au
q 2.776739563684644 3.8533e-06 au
i 2.470573216101709 1.9565e-05 deg
node 99.82132354216186 0.0010534 deg
peri 278.8376448014993 0.0011562 deg
M 217.0800833824003 0.00022053 deg
tp 2457317.336320773580
(2015-Oct-21.83632077)
0.0018837 TDB
period 3002.108352935133
8.22
0.00018716
5.124e-07
d
yr
n .1199157251096655 7.4759e-09 deg/d
Q 5.3687142657857 2.2313e-07 au
  Orbit Determination Parameters
   # obs. used (total)      184  
   data-arc span      9622 days (26.34 yr)  
   first obs. used      1990-09-24  
   last obs. used      2017-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   norm. resid. RMS      .66504  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Mar-08 15:47:23  

Additional Information
 Earth MOID = 1.77896 au 
 Jupiter MOID = .145747 au 
 T_jup = 2.953 
[ 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 13.9   0.8 19 2 parameter fit from 126 observations, autocmod 2.6g
comet total magnitude slope K1 10.   n/a 19 autocmod 2.6g
comet nuclear magnitude M2 16.2   0.4 19 from 41 observations, autocmod 2.6g
comet nuclear magnitude slope K2 5.   n/a 19 autocmod 2.6g
comet nuclear phase coefficient PC 0.03   n/a 19 autocmod 2.6g

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2015.8   326P/2015 P1       
 2007.6   326P/2007 V2       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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