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100P/Hartley 1
Classification: Jupiter-family Comet          SPK-ID: 1000040
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457480.5 (2016-Apr-02.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4134786792221094 2.4186e-07  
a 3.427940716240055 4.925e-07 au
q 2.010560316437425 9.4651e-07 au
i 25.5893256385759 5.3004e-05 deg
node 37.72517557568391 3.9237e-05 deg
peri 181.8620694828777 0.00027536 deg
M 359.9961498174051 0.00010406 deg
tp 2457480.524792893010
(2016-Apr-02.02479289)
0.0006701 JED
period 2318.186544039033
6.35
0.00049959
1.368e-06
d
yr
n .1552938010643281 3.3467e-08 deg/d
Q 4.845321116042685 6.9614e-07 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.852560107862985E-9 2.334E-10
A2 [EST] -6.172365669301005E-11 1.26E-11
A3 [EST] -8.400246975582376E-10 2.207E-10
  Orbit Determination Parameters
   # obs. used (total)      307  
   data-arc span      11264 days (30.84 yr)  
   first obs. used      1985-06-13  
   last obs. used      2016-04-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      1  
   fit RMS      .65234  
   data source      ORB  
   producer      Davide Farnocchia  
   solution date      2016-Apr-21 14:18:18  

Additional Information
 Earth MOID = 1.00326 au 
 Jupiter MOID = .135837 au 
 T_jup = 2.851 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 8. mag n/a ICQ 2003 Handbook  
comet total magnitude slope K1 25.0   n/a ICQ 2003 Handbook  

100P/Hartley 1          Discovered 1985-Jun-13 by Hartley, Malcolm at U. K. Schmidt Telescope Unit
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 
 1990.9   100P/1991 E1   1991 VII   1991j 
 1984.5   100P/1985 L1   1985 VII   1985f 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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