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397P/Lemmon
Classification: Jupiter-family Comet          SPK-ID: 1003207
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458083.5 (2017-Nov-26.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4019198775869781 1.4659e-06  
a 3.855391006379843 1.0182e-06 au
q 2.30583272504572 6.1171e-06 au
i 11.0013186781293 1.736e-05 deg
node 8.886361043365618 8.2003e-05 deg
peri 12.70279373677202 0.00056254 deg
M 238.1725230584221 0.00013054 deg
tp 2459019.215494537976
(2020-Jun-18.71549454)
0.0013712 TDB
period 2765.037793528391
7.57
0.0010954
2.999e-06
d
yr
n .1301971354035684 5.1578e-08 deg/d
Q 5.404949287713966 1.4275e-06 au
  Orbit Determination Parameters
   # obs. used (total)      497  
   data-arc span      3078 days (8.43 yr)  
   first obs. used      2012-09-14  
   last obs. used      2021-02-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .65901  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:28:45  

Additional Information
 Earth MOID = 1.30913 au 
 Jupiter MOID = .184111 au 
 T_jup = 2.897 
[ 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 15.1   0.8 10 2 parameter fit from 374 observations, autocmod 2.9c
comet total magnitude slope K1 5.5   n/a 10 autocmod 2.9c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2020.5   397P/2020 M2       
 2012.9   397P/2012 SB6       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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