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280P/Larsen
Classification: Jupiter-family Comet          SPK-ID: 1000492
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2454787.5 (2008-Nov-17.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4180949726414225 6.0767e-07  
a 4.511788051435455 7.9816e-07 au
q 2.625432149506652 2.4968e-06 au
i 11.77968038734452 1.6245e-05 deg
node 131.4963398852575 0.00014833 deg
peri 104.8350120016027 0.00081537 deg
M 169.8047538742992 0.00031596 deg
tp 2453136.417381769955
(2004-May-10.91738177)
0.0026554 TDB
period 3500.430517998472
9.58
0.00092887
2.543e-06
d
yr
n .1028444924557012 2.7291e-08 deg/d
Q 6.398143953364259 1.1319e-06 au
  Orbit Determination Parameters
   # obs. used (total)      171  
   data-arc span      3715 days (10.17 yr)  
   first obs. used      2004-04-19  
   last obs. used      2014-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   norm. resid. RMS      .74712  
   source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:04:04  

Additional Information
 Earth MOID = 1.6466 au 
 T_jup = 2.809 
[ 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 11.6   1. 33 from 78 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 12.   n/a 33 autocmod 2.5c
comet nuclear magnitude M2 14.5   01. 33 from 59 observations, autocmod 2.5c
comet nuclear magnitude slope K2 5.   n/a 33 autocmod 2.5c
comet nuclear phase coefficient PC 0.03   n/a 33 autocmod 2.5c

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 2013.9   280P/2013 C1       
 2004.4   280P/2004 H2       
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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