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55P/Tempel-Tuttle
Classification: Halley-type Comet* [NEO]          SPK-ID: 1000095
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 2451040.5 (1998-Aug-15.0) TDB
Reference: JPL J985/69 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.905552720972412 6.8031e-08  
a 10.3383382297577 5.1724e-07 AU
q 0.976427915467506 7.3483e-07 AU
i 162.486575379434 1.9316e-05 deg
node 235.270989149082 0.00010014 deg
peri 172.5002736828059 0.000146 deg
M 4.97833968468816 1.3565e-06 deg
tp 2450872.597734112361
(1998-Feb-28.09773411)
3.9005e-05 JED
period 12141.56115249823
33.24
0.00091119
2.495e-06
d
yr
n .02965022335088491 2.2252e-09 deg/d
Q 19.70024854404794 9.8563e-07 AU

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 1.580981480640338E-9 3.486E-10
A2 [EST] 9.186415654543854E-11 1.974E-13
  Orbit Determination Parameters
   # obs. used (total)      392  
   data-arc span      48407 days (132.53 yr)  
   first obs. used      1865-12-22  
   last obs. used      1998-07-05  
   planetary ephem.      DE405  
   SB-pert. ephem.      SB405-CPV-2  
   fit RMS      .72806  
   data source      ORB  
   producer      M.S.W. Keesey  
   solution date      2002-Jan-03 16:05:39  

Additional Information
 Earth MOID = .00848081 AU 
 T_jup = -0.637 
[ 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 10. mag n/a ICQ 1998 Handbook  
comet total magnitude slope K1 25.0   n/a ICQ 1998 Handbook  
comet nuclear magnitude M2 16. mag n/a ICQ 1998 Handbook  
comet nuclear magnitude slope K2 10.0   n/a ICQ 1998 Handbook  
diameter diameter 3.6 km n/a Lamy,P.L.,Toth,I.,Fernandez,Y.R.,Weaver,H.A. (2004) Comets II, pp. 223-264  
geometric albedo albedo 0.06   0.015 Earth, Moon, and Planets, v. 89, Issue 1, p. 117-134 (2002)  

55P/Tempel-Tuttle          Discovered 1866-Jan-06 by Tuttle, Horace at Harvard College Observatory, Massachusetts
First known observation: 1366/10/25
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1998.2   55P/1997 E1       
 1964.9   55P/1965 M2   1965 IV   1965i 
 1865.2   55P/1865 Y1   1866 I   
 1699.0   55P/1699 U1   1699 II   
 1366.5   55P/1366 U1   1366    
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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