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8P/Tuttle
Classification: Jupiter-family Comet* [NEO]          SPK-ID: 1000099
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2454577.5 (2008-Apr-21.0) TDB
Reference: JPL K215/15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8198131304213552 3.9072e-08  
a 5.700361750281282 1.943e-06 au
q 1.027130339249029 1.5396e-07 au
i 54.98284402884136 1.493e-05 deg
node 270.3413075480877 1.9552e-05 deg
peri 207.5057205748724 2.7152e-05 deg
M 6.154034496334972 3.8577e-06 deg
tp 2454492.521418305663
(2008-Jan-27.02141831)
1.3718e-05 TDB
period 4971.094885506494
13.61
0.0025417
6.959e-06
d
yr
n .07241865389646859 3.7027e-08 deg/d
Q 10.37359316131354 3.536e-06 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] 6.261133093039536E-10 8.276E-11
A2 [EST] 1.384713115959395E-10 8.302E-14
A3 [EST] -4.258834408917344E-10 1.027E-10
  Orbit Determination Parameters
   # obs. used (total)      1678  
   data-arc span      19976 days (54.69 yr)  
   first obs. used      1967-01-07  
   last obs. used      2021-09-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      1  
   norm. resid. RMS      .69492  
   source      ORB  
   producer      Davide Farnocchia  
   solution date      2021-Sep-20 09:31:28  

Additional Information
 Earth MOID = .0964117 au 
 Jupiter MOID = .738693 au 
 T_jup = 1.601 
[ 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 14.8   1. K215/15 2 parameter fit from 224 observations, autocmod 2.9e
comet total magnitude slope K1 4.5   n/a K215/15 autocmod 2.9e
diameter diameter 4.5 km 1. Harmon, J.K.;Nolan,M.C.;Howell,E.S.;Giorgini,J.D. (2008) IAUC 8909 equivalent diameter of a sphere having a volume equal to the sum of a 3km and 4km sphere

8P/Tuttle          Discovered 1790-Jan-09 by Mechain, Pierre F. A. at Paris, France
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1994.5       1994 XV   1992r 
 1980.9       1980 XIII   1980h 
 1967.2       1967 V   1967a 
 1940.0       1939 X   1939k 
 1926.4       1926 IV   1926a 
 1912.8       1912 IV   1912b 
 1899.2       1899 III   1899b 
 1885.6       1885 IV   1885b 
 1872.0   8P/1871 T1   1871 III   1871d 
 1858.4   8P/1858 A1   1858 I   
 1790.3   8P/1790 A2   1790 II   
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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