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79P/du Toit-Hartley
Classification: Jupiter-family Comet [NEO]          SPK-ID: 1000022
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
:
Orbital Elements at Epoch 2456558.5 (2013-Sep-23.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6185134899509153 1.7001e-06  
a 2.945858611714987 1.4079e-05 au
q 1.123805320881192 1.2004e-06 au
i 3.145618792107812 2.548e-05 deg
node 280.6403368540958 0.0007548 deg
peri 281.689317338125 0.00031317 deg
M 5.987205298911507 0.00046136 deg
tp 2456527.785890768675
(2013-Aug-23.28589077)
0.0021492 TDB
period 1846.784730312691
5.06
0.01324
3.625e-05
d
yr
n .1949333856247805 1.3975e-06 deg/d
Q 4.767911902548781 2.2788e-05 au

Additional Model Parameters
 Parameter Value Uncertainty (1-sigma) 
A1 [EST] -4.871755274376041E-11 6.081E-10
A2 [EST] -3.296388071159945E-11 1.561E-11
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      3684 days (10.09 yr)  
   first obs. used      2003-03-04  
   last obs. used      2013-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      3  
   norm. resid. RMS      .86966  
   source      ORB  
   producer      Ryan S. Park  
   solution date      2013-Sep-13 11:15:48  

Additional Information
 Earth MOID = .134779 au 
 T_jup = 2.947 
[ hide covariance matrix ]
Orbit Covariance (8×8)
  e q tp node peri i A1 A2
e 2.890280083202645E-12 3.947425608013576E-13 3.539275219061303E-9 1.190192674597316E-9 -2.969000924551418E-10 -1.419877457685325E-11 -9.9639445099655E-16 2.609183677761476E-17
q 3.947425608013576E-13 1.441030710618076E-12 9.635330929183865E-10 1.889683699134043E-10 1.419747716275824E-11 8.438993658200704E-12 -3.225118616432494E-16 3.939691413891746E-18
tp 3.539275219061303E-9 9.635330929183865E-10 4.6190837880391E-6 1.449374511689236E-6 -3.263207611557884E-7 -1.18350484565861E-8 -1.274689533241742E-12 3.28992788978046E-14
node 1.190192674597316E-9 1.889683699134043E-10 1.449374511689236E-6 5.697268172248813E-7 -1.926093586975137E-7 -4.876965403201302E-9 -4.133438547332266E-13 1.055755363253391E-14
peri -2.969000924551418E-10 1.419747716275824E-11 -3.263207611557884E-7 -1.926093586975137E-7 9.807580265331902E-8 9.579058330288824E-10 9.454172233120177E-14 -2.498213133908728E-15
i -1.419877457685325E-11 8.438993658200704E-12 -1.18350484565861E-8 -4.876965403201302E-9 9.579058330288824E-10 6.492335943730023E-10 4.03256338362443E-15 -9.817738166531661E-17
A1 -9.9639445099655E-16 -3.225118616432494E-16 -1.274689533241742E-12 -4.133438547332266E-13 9.454172233120177E-14 4.03256338362443E-15 3.697558933310189E-19 -8.957386675817178E-21
A2 2.609183677761476E-17 3.939691413891746E-18 3.28992788978046E-14 1.055755363253391E-14 -2.498213133908728E-15 -9.817738166531661E-17 -8.957386675817178E-21 2.438231597773591E-22

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 15.0   1. 16 from 115 observations, assumed slope, autocmod 2.5c
comet total magnitude slope K1 15.   n/a 16 autocmod 2.5c
diameter diameter 2.8 km n/a Lamy,P.L.;Toth,I.;Fernandez,Y.R.;Weaver,H.A. (2004) Comets II, pp. 223-264  

79P/du Toit-Hartley          Discovered 1945-Apr-09 by du Toit, D.
Reference: comet.disLast Updated: 2003-08-29

[ show close-approach data ]
Alternate Designations
 Perihelion 
Year
(est.)
 New-Style 
Desig
Roman
 Numeral 
Year/
 Letter 
 1988.4       1987 IX   1986q 
 1983.3   79P/1982 C1-A   1982 II   1982b 
 1942.9   79P/1945 G1   1945 II   1945c 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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