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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 ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


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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