Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
39P/Oterma
Classification: Chiron-type Comet          SPK-ID: 1000177
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2442711.5 (1975-Oct-26.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2436393769380302 5.1287e-08  
a 7.20956867758154 2.6235e-07 au
q 5.453033856983636 4.9676e-07 au
i 1.950747562018238 1.9226e-05 deg
node 332.1180878201394 0.00060689 deg
peri 56.12275197362448 0.00063395 deg
M 217.8496865460794 7.7568e-05 deg
tp 2445503.450232904525
(1983-Jun-17.95023290)
0.0016546 TDB
period 7070.699032763247
19.36
0.00038595
1.057e-06
d
yr
n .05091434359345247 2.7791e-09 deg/d
Q 8.966103498179445 3.2627e-07 au
  Orbit Determination Parameters
   # obs. used (total)      254  
   data-arc span      28733 days (78.67 yr)  
   first obs. used      1942-02-17  
   last obs. used      2020-10-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56734  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2020-Nov-17 10:09:30  

Additional Information
 Earth MOID = 4.45801 au 
 Jupiter MOID = .557506 au 
 T_jup = 3.004 
[ 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 7.0   1. 17 from 25 observations, assumed slope, autocmod 2.9a
comet total magnitude slope K1 14.75   n/a 17 autocmod 2.9a
comet nuclear magnitude M2 13.6   0.6 17 from 22 observations, autocmod 2.9a
comet nuclear magnitude slope K2 5.   n/a 17 autocmod 2.9a
comet nuclear phase coefficient PC 0.03   n/a 17 autocmod 2.9a

39P/Oterma          Discovered 1943-Apr-08 by Oterma, Liisi at Turku, Finland
discovered on plate/photo taken on discovery date
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2002.8   39P/2001 P3       
 1964.1       1958 IV   
 1944.7   39P/1943 G1   1950 III   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Feb-25 15:55 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin