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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 ]

[ show orbit diagram ]
:
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 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 4.628164188172836E-15 -4.992350048926472E-14 -9.105810378955171E-14 1.416891788215947E-12 -1.799322267138546E-12 -1.245232747793426E-14 1.860266976157709E-17 1.133633286265941E-20
q -4.992350048926472E-14 5.399746732666029E-13 1.741735431096187E-12 -1.469572973214115E-11 2.219252512698271E-11 5.196369710399084E-14 -2.058660415688782E-16 -1.228014174151406E-19
tp -9.105810378955171E-14 1.741735431096187E-12 1.521410787676572E-9 3.964884115341388E-10 4.071353642592593E-9 -1.380038741270009E-10 -7.685140503203391E-15 -3.113473247986196E-18
node 1.416891788215947E-12 -1.469572973214115E-11 3.964884115341388E-10 1.002770019122776E-8 9.695314594188321E-9 -1.554470591783962E-9 2.743837210490211E-15 1.661934141541694E-18
peri -1.799322267138546E-12 2.219252512698271E-11 4.071353642592593E-9 9.695314594188321E-9 2.131627566590006E-8 -1.716411405941044E-9 -3.100566401947418E-14 -1.467642550486508E-17
i -1.245232747793426E-14 5.196369710399084E-14 -1.380038741270009E-10 -1.554470591783962E-9 -1.716411405941044E-9 3.731088210524869E-10 4.03399931192634E-16 2.592244589851441E-19
A1 1.860266976157709E-17 -2.058660415688782E-16 -7.685140503203391E-15 2.743837210490211E-15 -3.100566401947418E-14 4.03399931192634E-16 1.215493236789324E-19 6.479591637699557E-23
A2 1.133633286265941E-20 -1.228014174151406E-19 -3.113473247986196E-18 1.661934141541694E-18 -1.467642550486508E-17 2.592244589851441E-19 6.479591637699557E-23 3.897007839031616E-26

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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