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409P/LONEOS-Hill
Classification: Jupiter-family Comet          SPK-ID: 1002317
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2454430.5 (2007-Nov-26.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7105839789329291 1.376e-07  
a 6.116796860902435 1.3501e-07 au
q 1.770299009157932 8.6146e-07 au
i 16.95562440957635 2.4121e-05 deg
node 143.9822138292701 2.3895e-05 deg
peri 15.37168094671984 0.00022386 deg
M 40.92411765051904 2.6382e-05 deg
tp 2453802.352931470518
(2006-Mar-07.85293147)
0.00042414 TDB
period 5525.664514058141
15.13
0.00018294
5.009e-07
d
yr
n .06515053512280823 2.1569e-09 deg/d
Q 10.46329471264694 2.3094e-07 au
  Orbit Determination Parameters
   # obs. used (total)      703  
   data-arc span      5502 days (15.06 yr)  
   first obs. used      2005-12-04  
   last obs. used      2020-12-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64157  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-14 17:13:27  

Additional Information
 Earth MOID = .786644 au 
 Jupiter MOID = .956706 au 
 T_jup = 2.310 
[ 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 10.2   0.6 31 2 parameter fit from 304 observations, autocmod 2.8
comet total magnitude slope K1 24.75   n/a 31 autocmod 2.8
comet nuclear magnitude M2 15.6   0.7 31 from 285 observations, autocmod 2.8
comet nuclear magnitude slope K2 5.   n/a 31 autocmod 2.8
comet nuclear phase coefficient PC 0.03   n/a 31 autocmod 2.8

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2021.3   409P/2020 V1       
 2006.2   409P/2005 XA54       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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