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

[ hide orbit diagram ]
Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


:
Orbital Elements at Epoch 2444720.5 (1981-Apr-26.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.860022494401565 9.5562e-08  
a 11.2476696975501 9.1699e-06 AU
q 1.57442074805817 2.1661e-06 AU
i 17.981415367796 3.022e-05 deg
node 79.18837876601667 3.044e-05 deg
peri 358.1910370660319 0.00026829 deg
M 3.705608922904022 1.2982e-05 deg
tp 2444578.676127067322
(1980-Dec-05.17612707)
0.00035548 JED
period 13778.19282012952
37.72
0.016849
4.613e-05
d
yr
n .02612824516971855 3.1952e-08 deg/d
Q 20.92091864704202 1.7056e-05 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.272538325643691E-9 1.235E-9
A2 [EST] -3.150601360130752E-11 4.674E-13
  Orbit Determination Parameters
   # obs. used (total)      280  
   data-arc span      41705 days (114.18 yr)  
   first obs. used      1867-01-27  
   last obs. used      1981-04-04  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB-CPV405-01  
   fit RMS      1.0726  
   data source      ORB  
   producer      M.S.W. Keesey  
   solution date      2001-Apr-05 11:44:37  

Additional Information
 Earth MOID = .590285 AU 
 T_jup = 1.890 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 8. mag n/a MPC data tape  
comet total magnitude slope K1 15   n/a MPC data tape  
comet nuclear magnitude M2 13. mag n/a MPC data tape  
comet nuclear magnitude slope K2 10   n/a MPC data tape  

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 
 1943.2   38P/1942 V1   1942 IX   
 1867.8   38P/1867 B1   1867 I   
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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