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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 ]

[ show orbit diagram ]
:
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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1903-Jan-17 05:40 00:03 Jupiter 1.66111523471092 1.66110748571697 1.66112298374518 10.380754354918 10.3315166877064 2416131.735925170 2.74962775425215 572.355926579824 97.493081292209 -48.1555447725149 3126633.40816865 T 18 CATAB v2.0f-lin.ifort 2019-Sep-03 14:42:03 2019-Sep-03 14:42
1982-Mar-26 15:31 < 00:01 Jupiter 1.94857691060578 1.94857194678758 1.9485818744273 16.695903684794 16.6698477602229 2445055.146294262 0.570511524543421 284.075246873722 98.6162861625749 -31.6587412631411 1501462.34295615 T 18 CATAB v2.0f-lin.ifort 2019-Sep-03 14:42:03 2019-Sep-03 14:42
1984-Jun-01 09:25 00:02 Saturn 1.4241700742425 1.42416512965041 1.42417501887515 9.44076101925207 9.42187918103258 2445852.892584122 1.90547407519909 577.431391714033 169.319120823823 -71.0883650721487 1198829.51601661 T 18 CATAB v2.0f-lin.ifort 2019-Sep-03 14:42:03 2019-Sep-03 14:42
2067-May-14 11:30 00:09 Uranus 1.58645842867538 1.58644195503646 1.58647490234189 5.39636891722272 5.39184258898578 2476149.979317832 9.1055324321436 889.865880520615 216.120224671534 -23.3751006878368 466605.12222626 T 18 CATAB v2.0f-lin.ifort 2019-Sep-03 14:42:03 2019-Sep-03 14:42
2135-Oct-21 02:04 00:04 Jupiter 1.46172004145622 1.46171333796338 1.4617267451704 11.8898509740104 11.841014176448 2501145.585771720 4.19112004089429 1005.15222767311 106.469042056412 71.3697299472791 2205522.11796352 T 18 CATAB v2.0f-lin.ifort 2019-Sep-03 14:42:03 2019-Sep-03 14:42

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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