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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 2455867.5 (2011-Nov-02.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1196916026361578 6.7379e-07  
a 4.77344170429677 2.5712e-07 au
q 4.202100816619217 3.188e-06 au
i 16.80709420337157 4.4276e-05 deg
node 36.41113599538443 5.2857e-05 deg
peri 328.57811875 0.00049999 deg
M 84.07626214243476 0.00038039 deg
tp 2454977.854971097659
(2009-May-26.35497110)
0.0040313 TDB
period 3809.30600675688
10.43
0.00030778
8.427e-07
d
yr
n .09450540317880432 7.6357e-09 deg/d
Q 5.344782591974323 2.8789e-07 au
  Orbit Determination Parameters
   # obs. used (total)      140  
   data-arc span      4103 days (11.23 yr)  
   first obs. used      2009-09-17  
   last obs. used      2020-12-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65431  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-14 17:13:24  

Additional Information
 Earth MOID = 3.21395 au 
 Jupiter MOID = .186994 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 7.6   0.7 20 from 83 observations, assumed slope, autocmod 2.8
comet total magnitude slope K1 16.75   n/a 20 autocmod 2.8
comet nuclear magnitude M2 14.7   0.6 20 from 43 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 20 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 20 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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