| <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML
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| <HTML><!--
Ephemeris Generator Page |
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| |
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| Written:
1997 March 11 |
|
| Modified:
2004 May 28 11:38 |
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| by:
Alan B. Chamberlin |
|
| for:
Solar System Dynamics Group |
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| Jet Propulsion Laboratory |
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| --> |
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| <HEAD> |
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| <TITLE>Ephemeris
Generator</TITLE> |
|
| <META NAME="Title" CONTENT="Ephemeris
Generator"> |
|
| <META
NAME="Information_ID"
CONTENT="JPLSSD-1.0"> |
|
| <META NAME="Date" CONTENT="2004 May 28
11:38"> |
|
| <META NAME="Version_ID" CONTENT="1.0"> |
|
| <META NAME="Author" CONTENT="Alan B.
Chamberlin"> |
|
| <META NAME="Creator" CONTENT="Alan B.
Chamberlin"> |
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| <META NAME="Custodian" CONTENT="Alan B.
Chamberlin"> |
|
| <META NAME="Custodian_Contact"
CONTENT="webmaster@ssd.jpl.nasa.gov"> |
|
| <META NAME="Description" CONTENT=""> |
|
|
<META NAME="Keywords" CONTENT="Ephemeris |
Ephemerides |
Orbital Dynamics |
Orbital Elements |
Orbits |
Horizons |
Planets |
Satellites |
Comets |
Asteroids |
Physical Parameters |
Astronomical Constants |
Solar System Dynamics |
JPL"> |
| </HEAD> |
|
| <BODY
BGCOLOR="FFFFFF" > |
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| <H1>
Ephemeris Generator |
|
| </H1> |
|
| <H3>Ephemeris
Settings</H3> |
|
| <PRE> |
|
| Target Body: <B>Comet 2P/Encke
[2003]</B> |
|
| Observer Location:
<B>Los Angeles |
CA</B> |
|
|
Coordinates:
<B>118°14'27.6''W |
34°03'15.1''N</B> |
|
|
| From: <B>A.D. 2004-07-03 00:00
UT</B> |
|
| To: <B>A.D. 2008-07-18 00:00 </B> |
|
| Step: <B>30 day</B> |
|
| Format:
<B>Calendar Date and Time</B> |
|
|
| Output Quantities:
<B>13 |
19 |
22 |
27-28</B> |
|
| Ref. Frame |
RA/Dec Format:
<B>J2000 |
Degrees</B> |
|
| Apparent
Coordinates Model: <B>Airless</B> |
|
| </PRE> |
|
| <HR> |
|
| <H2>HORIZONS
Generated Ephemeris</H2><PRE> |
|
| ******************************************************************************* |
|
| Ephemeris /
WWW_USER Sat Jul 3 15:54:35 2004 Pasadena |
USA
/ Horizons |
|
| ******************************************************************************* |
|
| Target body
name: 2P/Encke
{source: JPL#K033/8} |
|
| Center body
name: Earth (399)
{source: DE-0406LE-0406} |
|
| Center-site
name: (User Defined Site) |
|
| ******************************************************************************* |
|
| Start
time : A.D. 2004-Jul-03
00:00:00.0000 UT |
|
| Stop time
: A.D. 2008-Jul-18 00:00:00.0000 UT |
|
| Step-size : 43200 minutes |
|
| ******************************************************************************* |
|
| Center geodetic
: 241.759000 |
34.0542 |
-0.00{E-lon(deg) |
Lat(deg) |
Alt(km)} |
|
| Center cylindric:
241.759000 |
5289.894 |
3551.42{E-lon(deg) |
Dxy(km) |
Dz(km)} |
|
| Center
pole/equ : High-precision EOP model
{East-longitude +} |
|
| Center radii : 6378.1 x 6378.1 x 6356.8 km {Equator |
meridian |
pole} |
|
| Target
pole/equ : No model available |
|
| Target
radii : 2.4 km |
|
| Target
primary : Sun {source:
DE-0406LE-0406} |
|
| Interfering
body: MOON (Req= 1737.400) km
{source: DE-0406LE-0406} |
|
| Deflecting
body : Sun
{source: DE-0406LE-0406} |
|
| Deflecting
GM : 1.3271E+11 km^3/s^2 |
|
| Small perturbers:
Ceres |
Pallas |
Vesta {source: SB405-CPV-2} |
|
| Small body
GMs : 6.32E+01 |
1.43E+01 |
1.78E+01 km^3/s^2 |
|
| Atmos
refraction: NO (AIRLESS) |
|
| RA
format : DEG |
|
| Time format
: CAL |
|
| EOP
file : eop.040702.p040923 |
|
| EOP
coverage : DATA-BASED 1962-JAN-20 TO
2004-JUL-02. PREDICTS-> 2004-SEP-22 |
|
| Units conversion:
1 AU= 149597870.691 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 ) |
|
| Table
format : Comma Separated Values
(spreadsheet) |
|
| ******************************************************************************* |
|
| Initial FK5/J2000.0
heliocentric ecliptic osculating elements (AU |
DAYS |
DEG): |
|
| EPOCH=
2453001.5 != 2003-Dec-28.0000000 (CT)
Residual RMS= .66082 |
|
| EC= .8473387400958473 QR= .3384624529137247 TP= 2453003.378588202 |
|
| OM= 334.5872055524041 W= 186.4990312834768 IN= 11.76957788090182 |
|
| Comet physical
& dynamic parameters (KM |
SEC; A1 |
A2 |
A3=AU/d^2; DT=days): |
|
| GM= n.a. RAD= 2.4 A1= 9.177555D-11 |
|
| A2= -5.482499D-12 A3= n.a. DT= n.a. |
|
| M1= 9.8 M2= 14.5 k1= n.a. |
|
| k2= 5. PHCOF= .030 |
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| ************************************************************************************************* |
|
| Date__(UT)__HR:MN |
|
|
Ang-diam |
r |
rdot |
VmagSn |
VmagOb |
|
| ************************************************************************************************* |
|
| 2004-Jul-03 00:00 |
* |
|
0.004 |
2.636226 |
13.89641 |
16.52109 |
15.34907 |
|
| 2004-Aug-02 00:00 |
* |
|
0.004 |
2.863085 |
12.32621 |
14.81971 |
22.22325 |
|
| 2004-Sep-01 00:00 |
* |
|
0.003 |
3.064458 |
10.94622 |
13.37557 |
28.54489 |
|
| 2004-Oct-01 00:00 |
* |
|
0.003 |
3.2432 |
9.70815 |
12.12442 |
33.60379 |
|
| 2004-Oct-31 00:00 |
* |
|
0.002 |
3.401469 |
8.57864 |
11.0251 |
37.11669 |
|
| 2004-Nov-30 00:00 |
* |
|
0.002 |
3.540933 |
7.53373 |
10.05063 |
38.96959 |
|
| 2004-Dec-30 00:00 |
* |
|
0.002 |
3.662897 |
6.55558 |
9.18356 |
39.20255 |
|
| 2005-Jan-29 00:00 |
* |
|
0.001 |
3.768394 |
5.63045 |
8.4133 |
38.02806 |
|
| 2005-Feb-28 00:00 |
* |
|
0.001 |
3.858246 |
4.7475 |
7.73459 |
35.81711 |
|
| 2005-Mar-30 00:00 |
* |
|
0.001 |
3.933104 |
3.89796 |
7.14673 |
33.03813 |
|
| 2005-Apr-29 00:00 |
* |
|
0.001 |
3.99348 |
3.07449 |
6.65279 |
30.16764 |
|
| 2005-May-29 00:00 |
* |
|
0.002 |
4.039768 |
2.27074 |
6.25878 |
27.6043 |
|
| 2005-Jun-28 00:00 |
* |
|
0.002 |
4.07226 |
1.48117 |
5.97258 |
25.6162 |
|
| 2005-Jul-28 00:00 |
* |
|
0.002 |
4.091155 |
0.70061 |
5.80201 |
24.33219 |
|
| 2005-Aug-27 00:00 |
* |
|
0.002 |
4.096568 |
-0.07578 |
5.75274 |
23.78905 |
|
| 2005-Sep-26 00:00 |
* |
|
0.002 |
4.088531 |
-0.8526 |
5.82653 |
24.00853 |
|
| 2005-Oct-26 00:00 |
* |
|
0.002 |
4.066999 |
-1.63454 |
6.02069 |
25.02748 |
|
| 2005-Nov-25 00:00 |
* |
|
0.002 |
4.03184 |
-2.42645 |
6.32887 |
26.84076 |
|
| 2005-Dec-25 00:00 |
* |
|
0.002 |
3.982839 |
-3.23343 |
6.74308 |
29.30821 |
|
| 2006-Jan-24 00:00 |
* |
|
0.001 |
3.919684 |
-4.06125 |
7.25582 |
32.12539 |
|
| 2006-Feb-23 00:00 |
* |
|
0.001 |
3.841957 |
-4.91647 |
7.86159 |
34.88829 |
|
| 2006-Mar-25 00:00 |
* |
|
0.001 |
3.749117 |
-5.80671 |
8.55809 |
37.19117 |
|
| 2006-Apr-24 00:00 |
* |
|
0.001 |
3.64048 |
-6.7412 |
9.34693 |
38.69206 |
|
| 2006-May-24 00:00 |
* |
|
0.002 |
3.515183 |
-7.73127 |
10.23425 |
39.12172 |
|
| 2006-Jun-23 00:00 |
* |
m |
0.002 |
3.372145 |
-8.79122 |
11.23176 |
38.25779 |
|
| 2006-Jul-23 00:00 |
* |
m |
0.002 |
3.210002 |
-9.93984 |
12.35848 |
35.91333 |
|
| 2006-Aug-22 00:00 |
* |
m |
0.003 |
3.027011 |
-11.2025 |
13.64359 |
31.95139 |
|
| 2006-Sep-21 00:00 |
* |
m |
0.004 |
2.820913 |
-12.6147 |
15.13181 |
26.33289 |
|
| 2006-Oct-21 00:00 |
* |
m |
0.004 |
2.5887 |
-14.2287 |
16.89355 |
19.27516 |
|
| 2006-Nov-20 00:00 |
* |
|
0.004 |
2.326234 |
-16.125 |
19.04533 |
11.97245 |
|
| 2006-Dec-20 00:00 |
* |
|
0.003 |
2.027574 |
-18.4357 |
21.79619 |
10.29212 |
|
| 2007-Jan-19 00:00 |
* |
m |
0.003 |
1.683708 |
-21.3946 |
25.56936 |
18.59992 |
|
| 2007-Feb-18 00:00 |
* |
m |
0.003 |
1.280023 |
-25.4343 |
31.40271 |
30.70218 |
|
| 2007-Mar-20 00:00 |
* |
m |
0.004 |
0.793319 |
-30.8773 |
42.8547 |
45.50519 |
|
| 2007-Apr-19 00:00 |
* |
m |
0.008 |
0.339377 |
-1.20528 |
69.48386 |
54.3464 |
|
| 2007-May-19 00:00 |
* |
m |
0.013 |
0.782002 |
30.97835 |
43.23076 |
17.73441 |
|
| 2007-Jun-18 00:00 |
* |
m |
0.012 |
1.27067 |
25.53411 |
31.56493 |
16.62345 |
|
| 2007-Jul-18 00:00 |
* |
m |
0.01 |
1.675826 |
21.4659 |
25.66609 |
24.44062 |
|
| 2007-Aug-17 00:00 |
* |
m |
0.006 |
2.020762 |
18.4898 |
21.86346 |
31.95871 |
|
| 2007-Sep-16 00:00 |
* |
m |
0.004 |
2.320248 |
16.16829 |
19.09622 |
37.87983 |
|
| 2007-Oct-16 00:00 |
* |
m |
0.003 |
2.583379 |
14.26476 |
16.93408 |
41.88473 |
|
| 2007-Nov-15 00:00 |
* |
m |
0.002 |
2.816142 |
12.6456 |
15.16521 |
43.83286 |
|
| 2007-Dec-15 00:00 |
* |
m |
0.002 |
3.022708 |
11.22955 |
13.67177 |
43.72199 |
|
| 2008-Jan-14 00:00 |
* |
m |
0.002 |
3.206111 |
9.96393 |
12.3826 |
41.73745 |
|
| 2008-Feb-13 00:00 |
* |
m |
0.002 |
3.368629 |
8.81285 |
11.25254 |
38.2791 |
|
| 2008-Mar-14 00:00 |
* |
m |
0.001 |
3.51201 |
7.7507 |
10.25209 |
33.9383 |
|
| 2008-Apr-13 00:00 |
* |
m |
0.002 |
3.637623 |
6.75858 |
9.36204 |
29.43751 |
|
| 2008-May-13 00:00 |
* |
m |
0.002 |
3.746549 |
5.82214 |
8.57057 |
25.55104 |
|
| 2008-Jun-12 00:00 |
* |
m |
0.002 |
3.83965 |
4.93002 |
7.87147 |
22.98252 |
|
| 2008-Jul-12 00:00 |
* |
m |
0.002 |
3.917608 |
4.07305 |
7.26315 |
22.12119 |
|
| ************************************************************************************************* |
|
| Column
meaning: |
|
| |
|
| TIME |
|
|
|
Prior to 1962 |
times are UT1. Dates thereafter are UTC. Any
'b' symbol in |
|
| the
1st-column denotes a B.C. date. First-column blank (" ") denotes an
A.D. |
|
| date.
Calendar dates prior to 1582-Oct-15 are in the Julian calendar system. |
|
| Later
calendar dates are in the Gregorian system. |
|
|
| The uniform Coordinate Time scale is used
internally. Conversion between |
|
| CT and the
selected non-uniform UT output scale has not been determined for |
|
| UTC times
after the next July or January 1st.
The last known leap-second |
|
| is used
over any future interval. |
|
|
| NOTE: "n.a." in output means
quantity "not available" at the print-time. |
|
| |
|
| SOLAR
PRESENCE |
|
|
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 |
|
| 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 |
|
| |
|
| Ang-diam = |
|
|
The equatorial angular width of the target
body full disk |
if it were |
|
| fully
visible to the observer. Units:
ARCSECONDS |
|
| |
|
| r
rdot = |
|
| Target apparent heliocentric range
("r") and range-rate ("rdot") as seen |
|
| by
observer. Units: AU and KM/S |
|
| |
|
| VmagSn VmagOb = |
|
| Magnitude of target velocity wrt Sun
("VmagSn") and the observer ("VmagOb") |
|
| at time
light left object to be observed (print time minus 1-way light-time). |
|
| Units: KM/S |
|
| |
|
| PsAng PsAMV = |
|
| The position angles of the extended
Sun->target radius vector ("PsAng") |
|
| and the
negative of the target's heliocentric velocity vector ("PsAMV") |
|
| as seen in
the observer's plane-of-sky |
measured CCW from reference frame |
|
| North
Celestial Pole. Small-bodies only. Units: DEGREES. |
|
| |
|
| PlAng = |
|
|
Angle between observer and target orbital
plane |
measured from center |
|
| of target
at the moment light seen at observation time leaves the target. |
|
| Positive values
indicate observer is above the object's orbital plane |
in |
|
| the
direction of reference frame +z axis. Small-bodies only. Units: DEGREES. |
|
|
| Computations by ... |
|
|
Solar System Dynamics Group |
Horizons On-Line Ephemeris System |
|
|
4800 Oak Grove Drive |
Jet Propulsion Laboratory |
|
|
Pasadena |
CA
91109 USA |
|
| Information: http://ssd.jpl.nasa.gov/ |
|
| Connect : telnet://ssd.jpl.nasa.gov:6775 (via browser) |
|
| telnet ssd.jpl.nasa.gov
6775 (via command-line) |
|
| Author : Jon.Giorgini@jpl.nasa.gov |
|
|
| ************************************************************************************************* |
|
| </PRE> |
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| Last
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