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JPL Small-Body Database Browser
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38P/Stephan-Oterma
Classification: Halley-type Comet*          SPK-ID: 1000089
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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:
Orbital Elements at Epoch 2458255.5 (2018-May-17.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8592844463213444 2.2487e-08  
a 11.28871412285154 2.8689e-08 au
q 1.588497658117113 2.511e-07 au
i 18.35294756697458 6.8606e-06 deg
node 78.00048546655044 1.575e-05 deg
peri 359.5889661728357 2.8407e-05 deg
M 355.3748319182517 1.158e-06 deg
tp 2458433.487768664202
(2018-Nov-10.98776866)
4.4119e-05 TDB
period 13853.67960398372
37.93
5.2811e-05
1.446e-07
d
yr
n .02598587597597388 9.906e-11 deg/d
Q 20.98893058758596 5.3341e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.679763275545995E-11 2.094E-13
  Orbit Determination Parameters
   # obs. used (total)      3234  
   data-arc span      27990 days (76.63 yr)  
   first obs. used      1942-11-06  
   last obs. used      2019-06-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48111  
   source      ORB  
   producer      Javier Roa  
   solution date      2019-Sep-03 14:36:27  

Additional Information
 Earth MOID = .601894 au 
 Jupiter MOID = 1.33239 au 
 T_jup = 1.891 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 11.1   01. 18 2 parameter fit from 1062 observations, autocmod 2.8
comet total magnitude slope K1 11.   n/a 18 autocmod 2.8
comet nuclear magnitude M2 13.4   0.6 18 from 1783 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 18 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 18 autocmod 2.8

38P/Stephan-Oterma          Discovered 1867-Jan-22 by Coggia, Jerome E. at Marseilles Observatory, France
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1980.9   38P/1980 L2   1980 X   1980g 
 1943.0   38P/1942 V1   1942 IX   
 1867.1   38P/1867 B1   1867 I   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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