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55P/Tempel-Tuttle
Classification: Halley-type Comet* [NEO]          SPK-ID: 1000095
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


:
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 TDB
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  
   norm. resid. RMS      .72806  
   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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
comet total magnitude M1 10.   n/a ICQ 1998 Handbook  
comet total magnitude slope K1 25.0   n/a ICQ 1998 Handbook  
comet nuclear magnitude M2 16.   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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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