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239P/LINEAR
Classification: Jupiter-family Comet          SPK-ID: 1000295
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457612.5 (2016-Aug-12.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6314849844154252 1.6672e-07  
a 4.470231066967504 3.5196e-08 au
q 1.64734727131018 7.3961e-07 au
i 11.30597188987476 1.7295e-05 deg
node 255.9496812257828 7.8211e-05 deg
peri 220.381225478652 0.00011017 deg
M 268.1354132405456 1.3816e-05 deg
tp 2458493.425153027508
(2019-Jan-09.92515303)
0.00012835 TDB
period 3452.179629570529
9.45
4.0771e-05
1.116e-07
d
yr
n .1042819431863648 1.2316e-09 deg/d
Q 7.293114862624827 5.7421e-08 au
  Orbit Determination Parameters
   # obs. used (total)      342  
   data-arc span      7096 days (19.43 yr)  
   first obs. used      1999-11-14  
   last obs. used      2019-04-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46447  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-15 08:31:07  

Additional Information
 Earth MOID = .682291 au 
 Jupiter MOID = .0131653 au 
 T_jup = 2.573 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 15.2   0.5 16 2 parameter fit from 219 observations, autocmod 2.6q
comet total magnitude slope K1 14.   n/a 16 autocmod 2.6q
comet nuclear magnitude M2 18.0   0.8 16 from 55 observations, autocmod 2.6q
comet nuclear magnitude slope K2 5.   n/a 16 autocmod 2.6q
comet nuclear phase coefficient PC 0.03   n/a 16 autocmod 2.6q

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2009.6   239P/2010 C2       
 2000.1   239P/1999 XB69       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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