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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 2455900.5 (2011-Dec-05.0) TDB
Reference: JPL K095/1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4172170400828409 3.1539e-07  
a 3.416167306079676 2.5882e-07 AU
q 1.990884094209341 1.0209e-06 AU
i 25.66151100521957 2.8111e-05 deg
node 37.81685002953401 4.6908e-05 deg
peri 182.0166667181864 0.00029592 deg
M 113.8094990905865 0.00014011 deg
tp 2455171.406651797300
(2009-Dec-05.90665180)
0.00093295 JED
period 2306.253937064221
6.31
0.0002621
7.176e-07
d
yr
n .1560972944975293 1.774e-08 deg/d
Q 4.841450517950011 3.6681e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.848680746229127E-9 2.839E-10
A2 [EST] -4.413766828972458E-11 1.175E-11
  Orbit Determination Parameters
   # obs. used (total)      204  
   data-arc span      9160 days (25.08 yr)  
   first obs. used      1985-06-13  
   last obs. used      2010-07-12  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   condition code      1  
   fit RMS      .76261  
   data source      ORB  
   producer      Alan B. Chamberlin  
   solution date      2011-Nov-29 16:02:03  

Additional Information
 Earth MOID = .98467 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 
 1991.0   100P/1991 E1   1991 VII   1991j 
 1984.7   100P/1985 L1   1985 VII   1985f 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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