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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 2458262.5 (2018-May-24.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .859286285876197 2.1965e-08  
a 11.28891421895193 2.7664e-08 au
q 1.588505048173736 2.4538e-07 au
i 18.3529465228447 6.7826e-06 deg
node 78.00036419278668 1.5579e-05 deg
peri 359.5886765534911 2.6576e-05 deg
M 355.5568622320152 1.0604e-06 deg
tp 2458433.487343535866
(2018-Nov-10.98734354)
4.0417e-05 TDB
period 13854.04794702775
37.93
5.0925e-05
1.394e-07
d
yr
n .02598518507922694 9.5518e-11 deg/d
Q 20.98932338973012 5.1436e-08 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A2 [EST] -2.68703931765036E-11 2.055E-13
  Orbit Determination Parameters
   # obs. used (total)      3265  
   data-arc span      28321 days (77.54 yr)  
   first obs. used      1942-11-06  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47939  
   source      ORB  
   producer      Javier Roa  
   solution date      2020-May-27 08:45:01  

Additional Information
 Earth MOID = .604127 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 11.5   01. 22 2 parameter fit from 1092 observations, autocmod 2.8
comet total magnitude slope K1 9.5   n/a 22 autocmod 2.8
comet nuclear magnitude M2 13.4   0.6 22 from 1783 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 22 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 22 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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