RE: NASA requesting Stardust reentry observations

From: Dale Ireland (direland@drdale.com)
Date: Fri Dec 30 2005 - 15:40:54 EST

  • Next message: Skywayinc@aol.com: "Re: NASA requesting Stardust reentry observations"

    If anyone wants element sets for the Stardust reentry you can get them from
    the JPL Horizons site via Telnet or e-mail but NOT via the web link.
    I ran a simulation with a single element set with an epoch of Dec 28 on
    Dance of the Planets and it ended with an Earth impact at 1014 UT Jan 15
    while the official atmospheric entry is 956 UT on the JPL site. Dance is
    still a pretty unique program even though it came out in 1989.
    I have attached below some elements sets Don Yeomans sent me. They are for
    the Bus-Pod together. The Bus will actually be redirected to miss Earth
    after pod separation.
    Dale Ireland
    
    
    http://stardust.jpl.nasa.gov/ 
    
     BACKGROUND
       Launched: Feb 7, 1999. Primary goal: collect comet dust and
    sample other 
       volatiles during a close-encounter with comet Wild 2 in Jan
    2004. Captured 
       particles will be parachuted to Earth in 2006.
    
       See the web-page above for extensive information on the
    Stardust Mission.
    
     SPACECRAFT TRAJECTORY:
       The spacecraft has two components. This specific trajectory
    is for the main
       spacecraft bus (ID= -29). After release of the Sample Return
    Capsule (SRC, 
       ID= -29900), to occur on 2006-Jan-15 05:57:05.519 UTC,
    thrusters will divert
       the bus so it misses the Earth. The SRC, whose trajectory is
    available
       separately, will parachute back to Earth. 
    
       The predicted bus trajectory here is based on Nav study case
    sdu_16 and 
       actually assumes a no-release divert contingency. This
    trajectory will be 
       updated prior to sample return.
    ****************************************************************************
    ***
    
    
    
    Results
    
    
    ****************************************************************************
    ***
    Ephemeris / WWW_USER Wed Dec 28 14:30:12 2005  Pasadena,
    USA     / Horizons    
    ****************************************************************************
    ***
    Target body name: Stardust (bus) Spacecraft (-29) {source:
    sdu_bus_divert_no_rls_ca}
    Center body name: Sun
    (10)                       
    {source: DE405}
    Center-site name: BODYCENTRIC
    ****************************************************************************
    ***
    Start time      : A.D. 2005-Dec-28 00:00:00.0000
    CT 
    Stop  time      : A.D. 2006-Jan-17
    00:00:00.0000 CT 
    Step-size       : 1440 minutes
    ****************************************************************************
    ***
    Center geodetic : 0.000000,  0.000000,  0.00000  
    {E-lon(deg),Lat(deg),Alt(km)}
    Center cylindric: 0.00000,    
    0.000,     0.000  
    {E-lon(deg),Dxy(km),Dz(km)}
    Center radii    : 696000.0 x 696000.0 x 696000.0
    k{Equator, meridian, pole}    
    System GM       : 2.9591220828559093E-04
    AU^3/d^2
    Output units    : AU-D, deg, Julian day number
    (Tp)                            
    Output format   : 10
    Reference frame :
    ICRF/J2000.0                                                 
    Output type     : GEOMETRIC osculating elements
    Coordinate systm: Ecliptic and Mean Equinox of Reference
    Epoch                 
    ****************************************************************************
    ***
    JDCT 
       EC    QR   IN
       OM    W    Tp
       N     MA   TA
       A     AD   PR
    ****************************************************************************
    ***
    $$SOE
    2453732.500000000 = A.D. 2005-Dec-28 00:00:00.0000 (CT)
     EC= 4.639657272912759E-01 QR= 9.834537759028954E-01 IN=
    3.614353949856715E+00
     OM= 1.151133486718924E+02 W = 3.575676101888782E+02 Tp= 
    2453749.008713786490
     N = 3.966084685219177E-01 MA= 3.534525043078600E+02 TA=
    3.400714926413287E+02
     A = 1.834684508013342E+00 AD= 2.685915240123789E+00 PR=
    9.076962005921097E+02
    2453733.500000000 = A.D. 2005-Dec-29 00:00:00.0000 (CT)
     EC= 4.639912996188406E-01 QR= 9.834534585255218E-01 IN=
    3.614509574558497E+00
     OM= 1.151123632855873E+02 W = 3.575683993039257E+02 Tp= 
    2453749.008408911992
     N = 3.965802796229412E-01 MA= 3.538496708571801E+02 TA=
    3.412510913075973E+02
     A = 1.834771446482457E+00 AD= 2.686089434439392E+00 PR=
    9.077607195755655E+02
    2453734.500000000 = A.D. 2005-Dec-30 00:00:00.0000 (CT)
     EC= 4.640201461889098E-01 QR= 9.834531694816681E-01 IN=
    3.614685154795000E+00
     OM= 1.151113177604735E+02 W = 3.575692220160402E+02 Tp= 
    2453749.008075028192
     N = 3.965484405241554E-01 MA= 3.542468454724905E+02 TA=
    3.424357793218537E+02
     A = 1.834869655060381E+00 AD= 2.686286140639095E+00 PR=
    9.078336041976463E+02
    2453735.500000000 = A.D. 2005-Dec-31 00:00:00.0000 (CT)
     EC= 4.640529009183514E-01 QR= 9.834529089197707E-01 IN=
    3.614884508614440E+00
     OM= 1.151102050112543E+02 W = 3.575700825521394E+02 Tp= 
    2453749.007708997931
     N = 3.965122479377406E-01 MA= 3.546440279407107E+02 TA=
    3.436252821263407E+02
     A = 1.834981308052471E+00 AD= 2.686509707185171E+00 PR=
    9.079164688414021E+02
    2453736.500000000 = A.D. 2006-Jan-01 00:00:00.0000 (CT)
     EC= 4.640903728408924E-01 QR= 9.834526769572979E-01 IN=
    3.615112511107870E+00
     OM= 1.151090164799704E+02 W = 3.575709861150067E+02 Tp= 
    2453749.007307151798
     N = 3.964708043937432E-01 MA= 3.550412178726875E+02 TA=
    3.448193172269467E+02
     A = 1.835109180946505E+00 AD= 2.686765684935712E+00 PR=
    9.080113743822527E+02
    2453737.500000000 = A.D. 2006-Jan-02 00:00:00.0000 (CT)
     EC= 4.641336248662566E-01 QR= 9.834524734120001E-01 IN=
    3.615375476068655E+00
     OM= 1.151077417691544E+02 W = 3.575719391770120E+02 Tp= 
    2453749.006865146104
     N = 3.964229310725533E-01 MA= 3.554384147913329E+02 TA=
    3.460175947545191E+02
     A = 1.835256920471165E+00 AD= 2.687061367530331E+00 PR=
    9.081210287860788E+02
    2453738.500000000 = A.D. 2006-Jan-03 00:00:00.0000 (CT)
     EC= 4.641840340259196E-01 QR= 9.834522986355705E-01 IN=
    3.615681761469377E+00
     OM= 1.151063679387348E+02 W = 3.575729498207969E+02 Tp= 
    2453749.006377793383
     N = 3.963671005595205E-01 MA= 3.558356174966918E+02 TA=
    3.472198183842435E+02
     A = 1.835429253862780E+00 AD= 2.687406209089990E+00 PR=
    9.082489426892801E+02
    2453739.500000000 = A.D. 2006-Jan-04 00:00:00.0000 (CT)
     EC= 4.642434574189354E-01 QR= 9.834521530563471E-01 IN=
    3.616042636822284E+00
     OM= 1.151048787735017E+02 W = 3.575740282619882E+02 Tp= 
    2453749.005838755984
     N = 3.963012531603846E-01 MA= 3.562328241887292E+02 TA=
    3.484256861768953E+02
     A = 1.835632558621610E+00 AD= 2.687812964186874E+00 PR=
    9.083998527108031E+02
    2453740.500000000 = A.D. 2006-Jan-05 00:00:00.0000 (CT)
     EC= 4.643144703058837E-01 QR= 9.834520369980571E-01 IN=
    3.616473663238334E+00
     OM= 1.151032536271149E+02 W = 3.575751877187714E+02 Tp= 
    2453749.005240236875
     N = 3.962225331354596E-01 MA= 3.566300321684399E+02 TA=
    3.496348916194141E+02
     A = 1.835875681688884E+00 AD= 2.688299326379711E+00 PR=
    9.085803302280237E+02
    2453741.500000000 = A.D. 2006-Jan-06 00:00:00.0000 (CT)
     EC= 4.644170242998413E-01 QR= 9.834455787954387E-01 IN=
    3.616997503372405E+00
     OM= 1.151014639535850E+02 W = 3.575832020707083E+02 Tp= 
    2453749.010025161318
     N = 3.961126585292958E-01 MA= 3.570251839676628E+02 TA=
    3.508403719940784E+02
     A = 1.836215158836587E+00 AD= 2.688984738877736E+00 PR=
    9.088323542514988E+02
    2453742.500000000 = A.D. 2006-Jan-07 00:00:00.0000 (CT)
     EC= 4.645238750733660E-01 QR= 9.834455234895266E-01 IN=
    3.617649907158575E+00
     OM= 1.150994640308354E+02 W = 3.575845945594529E+02 Tp= 
    2453749.009275206365
     N = 3.959941589475268E-01 MA= 3.574223650392545E+02 TA=
    3.520553282434490E+02
     A = 1.836581460329850E+00 AD= 2.689717397170173E+00 PR=
    9.091043185000705E+02
    2453743.500000000 = A.D. 2006-Jan-08 00:00:00.0000 (CT)
     EC= 4.646596132543560E-01 QR= 9.834454994208832E-01 IN=
    3.618477015709928E+00
     OM= 1.150972175829754E+02 W = 3.575861403344483E+02 Tp= 
    2453749.008427382447
     N = 3.958436118076666E-01 MA= 3.578195242095627E+02 TA=
    3.532726949088873E+02
     A = 1.837047089608329E+00 AD= 2.690648679795775E+00 PR=
    9.094500688188892E+02
    2453744.500000000 = A.D. 2006-Jan-09 00:00:00.0000 (CT)
     EC= 4.648375793798556E-01 QR= 9.834455070252789E-01 IN=
    3.619559372273065E+00
     OM= 1.150946543411559E+02 W = 3.575878878178793E+02 Tp= 
    2453749.007461058907
     N = 3.956462349470791E-01 MA= 3.582166400028887E+02 TA=
    3.544921681446760E+02
     A = 1.837658006490190E+00 AD= 2.691870505955101E+00 PR=
    9.099037680673315E+02
    2453745.500000000 = A.D. 2006-Jan-10 00:00:00.0000 (CT)
     EC= 4.650808358736720E-01 QR= 9.834455461905817E-01 IN=
    3.621036060329838E+00
     OM= 1.150916690183384E+02 W = 3.575899123066163E+02 Tp= 
    2453749.006349588744
     N = 3.953764822484368E-01 MA= 3.586136718340795E+02 TA=
    3.557134555615880E+02
     A = 1.838493761570166E+00 AD= 2.693541976949750E+00 PR=
    9.105245662380905E+02
    2453746.500000000 = A.D. 2006-Jan-11 00:00:00.0000 (CT)
     EC= 4.654330150305456E-01 QR= 9.834456150101095E-01 IN=
    3.623169759975699E+00
     OM= 1.150880932837626E+02 W = 3.575923409191374E+02 Tp= 
    2453749.005060293712
     N = 3.949860441328487E-01 MA= 3.590105361443177E+02 TA=
    3.569362858530226E+02
     A = 1.839705112103590E+00 AD= 2.695964609197071E+00 PR=
    9.114246068879296E+02
    2453747.500000000 = A.D. 2006-Jan-12 00:00:00.0000 (CT)
     EC= 4.659878992589142E-01 QR= 9.834457059599182E-01 IN=
    3.626523542434891E+00
     OM= 1.150836324095855E+02 W = 3.575954162774740E+02 Tp= 
    2453749.003563660197
     N = 3.943711516764224E-01 MA= 3.594070378676178E+02 TA=
    3.581604225896037E+02
     A = 1.841616893315942E+00 AD= 2.699788080671966E+00 PR=
    9.128456746130771E+02
    2453748.500000000 = A.D. 2006-Jan-13 00:00:00.0000 (CT)
     EC= 4.669908485055547E-01 QR= 9.834457927118974E-01 IN=
    3.632563801488835E+00
     OM= 1.150776943837818E+02 W = 3.575997065686344E+02 Tp= 
    2453749.001903371420
     N = 3.932605953836429E-01 MA= 3.598026211813339E+02 TA=
    3.593856626060937E+02
     A = 1.845082377956405E+00 AD= 2.706718963200913E+00 PR=
    9.154235238056440E+02
    2453749.500000000 = A.D. 2006-Jan-14 00:00:00.0000 (CT)
     EC= 4.693291089200402E-01 QR= 9.834459229561919E-01 IN=
    3.646659675727240E+00
     OM= 1.150687936534515E+02 W = 3.576100976499780E+02 Tp= 
    2453749.003198293503
     N = 3.906755627546324E-01 MA= 1.940882862694830E-01 TA=
    6.085773025512661E-01
     A = 1.853212489109392E+00 AD= 2.722979055262592E+00 PR=
    9.214807229345478E+02
    2453750.500000000 = A.D. 2006-Jan-15 00:00:00.0000 (CT)
     EC= 4.820372105755652E-01 QR= 9.834470528162420E-01 IN=
    3.720186100578059E+00
     OM= 1.150500972502008E+02 W = 3.576482438756484E+02 Tp= 
    2453749.024119641632
     N = 3.767258666975188E-01 MA= 5.560023071346482E-01 TA=
    1.815561755596812E+00
     A = 1.898682826056012E+00 AD= 2.813918599295782E+00 PR=
    9.556020221171902E+02
    2453751.500000000 = A.D. 2006-Jan-16 00:00:00.0000 (CT)
     EC= 3.052442417351236E-01 QR= 9.208303690252665E-01 IN=
    1.985281622710692E+00
     OM= 2.950416680212056E+02 W = 2.233397976056392E+02 Tp= 
    2453786.492987311911
     N = 6.459261327548991E-01 MA= 3.373971150320306E+02 TA=
    3.173115388259469E+02
     A = 1.325401564608837E+00 AD= 1.729972760192408E+00 PR=
    5.573392710782371E+02
    2453752.500000000 = A.D. 2006-Jan-17 00:00:00.0000 (CT)
     EC= 2.999131059292822E-01 QR= 9.217290344649889E-01 IN=
    1.957955787806807E+00
     OM= 2.950270777547382E+02 W = 2.233180449964296E+02 Tp= 
    2453786.561692715157
     N = 6.524197406111233E-01 MA= 3.377774792739394E+02 TA=
    3.184716898726801E+02
     A = 1.316592329140049E+00 AD= 1.711455623815108E+00 PR=
    5.517920099456020E+02
    $$EOE
    ****************************************************************************
    ***
    Coordinate system description:
    
      Ecliptic and Mean Equinox of Reference Epoch
    
        Reference epoch: J2000.0
        xy-plane: plane of the Earth's orbit at the reference
    epoch
        x-axis  : out along ascending node of
    instantaneous plane of the Earth's
                 
    orbit and the Earth's mean equator at the reference epoch
        z-axis  : perpendicular to the xy-plane in the
    directional (+ or -) sense
                 
    of Earth's north pole at the reference epoch.
    
    Symbol meaning [1 AU=149597870.691 km, 1 day=86400.0 s]:
    
        JDCT     Epoch Julian Date,
    Coordinate Time
          EC     Eccentricity,
    e                                                   
          QR     Periapsis
    distance, q
    (AU)                                        
          IN     Inclination
    w.r.t xy-plane, i
    (degrees)                           
          OM     Longitude of
    Ascending Node, OMEGA,
    (degrees)                     
          W      Argument
    of Perifocus, w
    (degrees)                                
          Tp     Time of
    periapsis (Julian day
    number)                             
          N      Mean
    motion, n
    (degrees/day)                                      
          MA     Mean anomaly, M
    (degrees)                                         
          TA     True anomaly,
    nu
    (degrees)                                        
          A      Semi-major
    axis, a
    (AU)                                           
          AD     Apoapsis
    distance
    (AU)                                            
          PR     Orbital period
    (day)                                              
    
    Geometric states/elements have no aberration corrections applied.
    
    
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    This archive was generated by hypermail 2b29 : Fri Dec 30 2005 - 15:44:56 EST