The text below shows what a typical ephemeris generated by HORIZONS should look like - it was copied and pasted directly out of a browser window. Ephemerides that do not conform to the HORIZONS format will be rejected by the OT.
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JPL/HORIZONS 2 Pallas (A802 FA) 2025-Feb-03 01:21:41
Rec #: 2 (+COV) Soln.date: 2024-Dec-12_17:11:23 # obs: 9741 (1804-2024)
IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs):
EPOCH= 2457870.5 ! 2017-Apr-27.00 (TDB) Residual RMS= .27459
EC= .230654532309575 QR= 2.133412766192127 TP= 2458320.726491679
OM= 173.0883296761345 W= 309.9974922206295 IN= 34.83970333808084
A= 2.773023116125753 MA= 263.9040942238881 ADIST= 3.412633466059379
PER= 4.61784 N= .21343903 ANGMOM= .027873209
DAN= 2.28651 DDN= 3.08249 L= 128.7190393
B= -25.9536438 MOID= 1.23221004 TP= 2018-Jul-21.2264916790
Asteroid physical parameters (km, seconds, rotational period in hours):
GM= 13.63 RAD= 256.5 ROTPER= 7.813221
H= 4.11 G= .110 B-V= .635
ALBEDO= .155 STYP= B
ASTEROID comments:
1: soln ref.= JPL#67, OCC=0
2: source=ORB
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Ephemeris / WWW_USER Mon Feb 3 01:21:42 2025 Pasadena, USA / Horizons
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Target body name: 2 Pallas (A802 FA) {source: JPL#67}
Center body name: Earth (399) {source: DE441}
Center-site name: Atacama Large mm/sub-mm Array (ALMA, center)
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Start time : A.D. 2025-Jan-13 20:00:00.0000 UT
Stop time : A.D. 2025-Jul-18 20:20:00.0000 UT
Step-size : 14400 minutes
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Target pole/equ : IAU {East-longitude positive}
Target radii : 275.0, 258.0, 238.0 km {Equator_a, b, pole_c}
Center geodetic : 292.2452521,-23.029211,5.07489 {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 292.2452521,5877.5143,-2481.68209 {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}
Target primary : Sun
Vis. interferer : MOON (R_eq= 1737.400) km {source: DE441}
Rel. light bend : Sun {source: DE441}
Rel. lght bnd GM: 1.3271E+11 km^3/s^2
Small-body perts: Yes {source: SB441-N16}
Atmos refraction: NO (AIRLESS)
RA format : HMS
Time format : CAL
Calendar mode : Mixed Julian/Gregorian
EOP file : eop.250131.p250429
EOP coverage : DATA-BASED 1962-JAN-20 TO 2025-JAN-31. PREDICTS-> 2025-APR-28
Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s
Table cut-offs 1: Elevation (-90.0deg=NO ),Airmass (>38.000=NO), Daylight (NO )
Table cut-offs 2: Solar elongation ( 0.0,180.0=NO ),Local Hour Angle( 0.0=NO )
Table cut-offs 3: RA/DEC angular rate ( 0.0=NO )
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Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.):
EPOCH= 2457870.5 ! 2017-Apr-27.00 (TDB) Residual RMS= .27459
EC= .230654532309575 QR= 2.133412766192127 TP= 2458320.726491679
OM= 173.0883296761345 W= 309.9974922206295 IN= 34.83970333808084
Equivalent ICRF heliocentric cartesian coordinates (au, au/d):
X= 2.964644625717728E+00 Y= 1.388006437987008E-01 Z=-2.357603579788067E-01
VX=-2.665042982037095E-03 VY= 9.076070445626725E-03 VZ=-1.610668574682083E-03
Asteroid physical parameters (km, seconds, rotational period in hours):
GM= 13.63 RAD= 256.5 ROTPER= 7.813221
H= 4.11 G= .110 B-V= .635
ALBEDO= .155 STYP= B
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Date__(UT)__HR:MN R.A._________(ICRF)_________DEC delta deldot
************************************************************************************
$$SOE
2025-Jan-13 20:00 * 19 00 58.372486 +03 08 11.73781 4.18225356024991 -0.1541259
2025-Jan-23 20:00 * 19 14 46.828789 +03 29 31.38065 4.17201448056080 -2.6351448
2025-Feb-02 20:00 *m 19 28 15.531752 +03 59 47.74279 4.14726944504919 -5.1276510
2025-Feb-12 20:00 * 19 41 18.401465 +04 38 18.98651 4.10825588188254 -7.5392037
2025-Feb-22 20:00 * 19 53 50.424648 +05 24 19.12791 4.05547625315058 -9.8836675
2025-Mar-04 20:00 *m 20 05 45.952890 +06 17 03.16163 3.98937506353445 -12.1307522
2025-Mar-14 20:00 * 20 16 58.704449 +07 15 31.32735 3.91084045549975 -14.1944862
2025-Mar-24 20:00 * 20 27 23.138926 +08 18 44.64039 3.82091426745452 -16.0982566
2025-Apr-03 20:00 *m 20 36 52.328924 +09 25 39.42601 3.72066348611142 -17.7843491
2025-Apr-13 20:00 * 20 45 18.833700 +10 34 54.26679 3.61166242268931 -19.1818592
2025-Apr-23 20:00 * 20 52 35.386074 +11 45 07.63016 3.49555382837809 -20.3071324
2025-May-03 20:00 *m 20 58 32.855878 +12 54 40.18577 3.37416266802182 -21.0692009
2025-May-13 20:00 * 21 03 02.312376 +14 01 27.85639 3.24986550501436 -21.4150656
2025-May-23 20:00 * 21 05 55.123471 +15 03 16.57244 3.12508906406692 -21.3351502
2025-Jun-02 20:00 *m 21 07 02.201635 +15 57 15.27401 3.00265338340735 -20.7097185
2025-Jun-12 20:00 * 21 06 17.998686 +16 40 04.93125 2.88588891399198 -19.5132333
2025-Jun-22 20:00 * 21 03 40.707808 +17 08 14.37217 2.77814556955834 -17.7163573
2025-Jul-02 20:00 *m 20 59 14.350305 +17 17 47.95792 2.68319920225201 -15.2301197
2025-Jul-12 20:00 * 20 53 13.705068 +17 05 20.48551 2.60489079989877 -12.1199417
$$EOE
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Column meaning:
TIME
Times PRIOR to 1962 are UT1, a mean-solar time closely related to the
prior but now-deprecated GMT. Times AFTER 1962 are in UTC, the current
civil or "wall-clock" time-scale. UTC is kept within 0.9 seconds of UT1
using integer leap-seconds for 1972 and later years.
Conversion from the internal Barycentric Dynamical Time (TDB) of solar
system dynamics to the non-uniform civil UT time-scale requested for output
has not been determined for UTC times after the next July or January 1st.
Therefore, the last known leap-second is used as a constant over future
intervals.
Time tags refer to the UT time-scale conversion from TDB on Earth
regardless of observer location within the solar system, although clock
rates may differ due to the local gravity field and no analog to "UT"
may be defined for that location.
Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank
(" ") denotes an A.D. date.
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.
NOTE: "n.a." in output means quantity "not available" at the print-time.
SOLAR PRESENCE (OBSERVING SITE)
Time tag is followed by a blank, then a solar-presence symbol:
'*' Daylight (refracted solar upper-limb on or above apparent horizon)
'C' Civil twilight/dawn
'N' Nautical twilight/dawn
'A' Astronomical twilight/dawn
' ' Night OR geocentric ephemeris
LUNAR PRESENCE (OBSERVING SITE)
The solar-presence symbol is immediately followed by a lunar-presence symbol:
'm' Refracted upper-limb of Moon on or above apparent horizon
' ' Refracted upper-limb of Moon below apparent horizon OR geocentric
ephemeris
'R.A._________(ICRF)_________DEC' =
Astrometric right ascension and declination of the target center with
respect to the observing site (coordinate origin) in the reference frame of
the planetary ephemeris (ICRF). Compensated for down-leg light-time delay
aberration.
Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff}
DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff}
'delta deldot' =
Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot")
of the target center relative to the observer. A positive "deldot" means the
target center is moving away from the observer, negative indicates movement
toward the observer. Units: AU and KM/S
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 : Jon.D.Giorgini@jpl.nasa.gov
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