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. ------------------------------------------------------------------------- Subscribe/Unsubscribe info, Frequently Asked Questions, SeeSat-L archive: http://www.satobs.org/seesat/seesatindex.html
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