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JPL Small-Body Database Browser
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389P/Siding Spring
Classification: Jupiter-family Comet*          SPK-ID: 1002413
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456050.5 (2012-May-03.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7037838502554089 3.9177e-07  
a 5.622487644945272 1.5045e-07 au
q 1.665471642172222 2.2356e-06 au
i 160.0786178595657 4.375e-05 deg
node 218.8609203368214 0.00011751 deg
peri 249.5678147707536 0.00033341 deg
M 152.683001027052 3.6636e-05 deg
tp 2453985.217912736649
(2006-Sep-06.71791274)
0.0005137 TDB
period 4869.576484700315
13.33
0.00019545
5.351e-07
d
yr
n .07392840037138368 2.9673e-09 deg/d
Q 9.579503647718321 2.5633e-07 au
  Orbit Determination Parameters
   # obs. used (total)      84  
   data-arc span      4823 days (13.20 yr)  
   first obs. used      2006-09-01  
   last obs. used      2019-11-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .473  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-08 14:19:54  

Additional Information
 Earth MOID = .771912 au 
 Jupiter MOID = .55815 au 
 T_jup = -0.463 
[ 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 14.4   0.4 12 2 parameter fit from 58 observations, autocmod 2.8
comet total magnitude slope K1 19.   n/a 12 autocmod 2.8
comet nuclear magnitude M2 19.3   0.6 12 from 6 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 12 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 12 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.0   389P/2019 S1       
 2006.7   389P/2006 R1       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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