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prob_1_Halley_1.csv
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prob_1_Halley_1.csv
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*******************************************************************************
JPL/HORIZONS 1P/Halley 2023-Mar-05 12:51:05
Rec #:90000030 Soln.date: 2022-Jun-07_13:24:35 # obs: 8548 (1835-1994)
IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):
EPOCH= 2439857.5 ! 1968-Jan-02.0000000 (TDB) RMSW= n.a.
EC= .9679427911271 QR= .5747157977675837 TP= 2446470.1488983454
OM= 59.11448293673941 W= 112.257792004868 IN= 162.1878711908339
A= 17.92781773504393 MA= 274.1404919498392 ADIST= 35.28091967232027
PER= 75.91006173829101 N= .012984132 ANGMOM= .018294235
DAN= 1.7857 DDN= .82759 L= 305.8527835
B= 16.4455591 MOID= .0752736 TP= 1986-Feb-08.6488983454
Comet physical (GM= km^3/s^2; RAD= km):
GM= n.a. RAD= 5.5
M1= 5.5 M2= 13.6 k1= 8. k2= 5. PHCOF= .030
Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au):
AMRAT= 0. DT= 0.
A1= 4.823267459869E-10 A2= 1.554713398218E-10 A3= 0.
Standard model:
ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808
COMET comments
1: soln ref.= JPL#73, data arc: 1835-08-21 to 1994-01-11
2: k1=8.0, k2=5.0, phase coef.=0.03;
*******************************************************************************
*******************************************************************************
Ephemeris / WWW_USER Sun Mar 5 12:51:05 2023 Pasadena, USA / Horizons
*******************************************************************************
Target body name: 1P/Halley {source: JPL#73}
Center body name: Earth (399) {source: DE441}
Center-site name: (user defined site below)
*******************************************************************************
Start time : A.D. 1910-Jan-01 09:15:00.0000 TDB
Stop time : A.D. 1986-Dec-31 17:15:00.0000 TDB
Step-size : 25 calendar years
*******************************************************************************
Center geodetic : 286.0058, 40.7517, -2.02709E-12 {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 286.0058, 4838.6361, 4141.57364 {E-lon(deg),Dxy(km),Dz(km)}
Center pole/equ : ITRF93 {East-longitude positive}
Center radii : 6378.137, 6378.137, 6356.752 km {Equator_a, b, pole_c}
Small perturbers: Yes {source: SB441-N16}
Output units : KM-S
Calendar mode : Mixed Julian/Gregorian
Output type : GEOMETRIC cartesian states
Output format : 4 (position, LT, range, and range-rate)
EOP file : eop.230303.p230526
EOP coverage : DATA-BASED 1962-JAN-20 TO 2023-MAR-03. PREDICTS-> 2023-MAY-25
Reference frame : Ecliptic of J2000.0
*******************************************************************************
Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.):
EPOCH= 2439857.5 ! 1968-Jan-02.0000000 (TDB) RMSW= n.a.
EC= .9679427911271 QR= .5747157977675837 TP= 2446470.1488983454
OM= 59.11448293673941 W= 112.257792004868 IN= 162.1878711908339
Equivalent ICRF heliocentric cartesian coordinates (au, au/d):
X=-1.333580711037850E+01 Y= 2.543805202833605E+01 Z= 2.636800024594010E+00
VX= 1.415824036915183E-03 VY=-1.416718165237950E-03 VZ= 4.194435401575923E-05
Comet physical (GM= km^3/s^2; RAD= km):
GM= n.a. RAD= 5.5
M1= 5.5 M2= 13.6 k1= 8. k2= 5. PHCOF= .030
Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au):
AMRAT= 0. DT= 0.
A1= 4.823267459869E-10 A2= 1.554713398218E-10 A3= 0.
Standard model:
ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808
*******************************************************************************
JDTDB, Calendar Date (TDB), X, Y, Z, LT, RG, RR,
**************************************************************************************************************************************************************************************************
$$SOE
2418672.885416667, A.D. 1910-Jan-01 09:15:00.0000, 1.664439201171871E+08, 1.276706631622443E+08, -7.901262493023448E+06, 7.002129841904855E+02, 2.099185716539808E+08, 1.224699357889426E+01,
2427803.885416667, A.D. 1935-Jan-01 09:15:00.0000, -2.987432490025215E+09, 3.397331813837101E+09, -1.414758994040793E+09, 1.581113492347940E+04, 4.740059002479532E+09, -1.240341012318659E+01,
2436934.885416667, A.D. 1960-Jan-01 09:15:00.0000, -2.490976233596333E+09, 3.890122983684577E+09, -1.359751826353990E+09, 1.606205312101761E+04, 4.815282385676438E+09, -1.248283261657794E+01,
2446066.885416667, A.D. 1985-Jan-01 09:15:00.0000, 3.374299909319351E+07, 6.345306291932410E+08, -1.275191180024461E+08, 2.161816612517905E+03, 6.480963160119762E+08, -7.948754511285829E+00,
$$EOE
**************************************************************************************************************************************************************************************************
TIME
Barycentric Dynamical Time ("TDB" or T_eph) output was requested. This
continuous coordinate time is equivalent to the relativistic proper time
of a clock at rest in a reference frame co-moving with the solar system
barycenter but outside the system's gravity well. It is the independent
variable in the solar system relativistic equations of motion.
TDB runs at a uniform rate of one SI second per second and is independent
of irregularities in Earth's rotation.
CALENDAR SYSTEM
Mixed calendar mode was active such that calendar dates after AD 1582-Oct-15
(if any) are in the modern Gregorian system. Dates prior to 1582-Oct-5 (if any)
are in the Julian calendar system, which is automatically extended for dates
prior to its adoption on 45-Jan-1 BC. The Julian calendar is useful for
matching historical dates. The Gregorian calendar more accurately corresponds
to the Earth's orbital motion and seasons. A "Gregorian-only" calendar mode is
available if such physical events are the primary interest.
REFERENCE FRAME AND COORDINATES
Ecliptic at the standard reference epoch
Reference epoch: J2000.0
X-Y plane: adopted Earth orbital plane at the reference epoch
Note: IAU76 obliquity of 84381.448 arcseconds wrt ICRF X-Y plane
X-axis : ICRF
Z-axis : perpendicular to the X-Y plane in the directional (+ or -) sense
of Earth's north pole at the reference epoch.
Symbol meaning:
JDTDB Julian Day Number, Barycentric Dynamical Time
X X-component of position vector (km)
Y Y-component of position vector (km)
Z Z-component of position vector (km)
LT One-way down-leg Newtonian light-time (sec)
RG Range; distance from coordinate center (km)
RR Range-rate; radial velocity wrt coord. center (km/sec)
ABERRATIONS AND CORRECTIONS
Geometric state vectors have NO corrections or aberrations applied.
Computations by ...
Solar System Dynamics Group, Horizons On-Line Ephemeris System
4800 Oak Grove Drive, Jet Propulsion Laboratory
Pasadena, CA 91109 USA
General site: https://ssd.jpl.nasa.gov/
Mailing list: https://ssd.jpl.nasa.gov/email_list.html
System news : https://ssd.jpl.nasa.gov/horizons/news.html
User Guide : https://ssd.jpl.nasa.gov/horizons/manual.html
Connect : browser https://ssd.jpl.nasa.gov/horizons/app.html#/x
API https://ssd-api.jpl.nasa.gov/doc/horizons.html
command-line telnet ssd.jpl.nasa.gov 6775
e-mail/batch https://ssd.jpl.nasa.gov/ftp/ssd/hrzn_batch.txt
scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS
Author : [email protected]
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