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393P/Spacewatch-Hill
Classification: Jupiter-family Comet          SPK-ID: 1003044
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2455445.5 (2010-Sep-06.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1201995927334332 1.0866e-06  
a 4.773643273655572 5.2403e-07 au
q 4.199853296307479 5.4899e-06 au
i 16.80708918163193 4.8684e-05 deg
node 36.41142582956781 6.0116e-05 deg
peri 328.4785395874034 0.00064234 deg
M 44.23328240996664 0.00048163 deg
tp 2454977.420051901651
(2009-May-25.92005190)
0.0050588 TDB
period 3809.547294130658
10.43
0.00062729
1.717e-06
d
yr
n .09449941743856267 1.5561e-08 deg/d
Q 5.347433251003665 5.8701e-07 au
  Orbit Determination Parameters
   # obs. used (total)      105  
   data-arc span      3696 days (10.12 yr)  
   first obs. used      2009-09-17  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .71275  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-30 13:59:27  

Additional Information
 Earth MOID = 3.21178 au 
 Jupiter MOID = .184588 au 
 T_jup = 2.911 
[ 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 11.4   0.7 16 from 48 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 10.   n/a 16 autocmod 2.8
comet nuclear magnitude M2 14.7   0.6 16 from 43 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 16 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 16 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2019.8   393P/2019 S5       
 2009.4   393P/2009 SK280       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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