Ephemeris Generator
Ephemeris Settings
Target Body: *Comet C/Zanotta-Brewington (1991 Y1 = 1991 Y1) [1992.33]*
Observer Location: *Geocentric [Code=500]*
Coordinates: *0 00'00.0''E, 0 00'00.0''N, -6378140. m*
From: *A.D. 1992-02-26 00:00 UT*
To: *A.D. 1992-02-29 00:00 *
Step: *2 hour*
Format: *Calendar Date and Time*
Output Quantities: *2-3,9,19-20,23-24*
Ref. Frame, RA/Dec Format: *J2000, HMS*
Apparent Coordinates Model: *Airless*
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HORIZONS Generated Ephemeris
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Ephemeris / WWW_USER Thu Feb 24 06:00:04 2005 Pasadena, USA / Horizons
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Target body name: Zanotta-Brewington (C/1991 Y1) {source: JPL#1}
Center body name: Earth (399) {source: DE-0406LE-0406}
Center-site name: GEOCENTRIC
*******************************************************************************
Start time : A.D. 1992-Feb-26 00:00:00.0000 UT
Stop time : A.D. 1992-Feb-29 00:00:00.0000 UT
Step-size : 120 minutes
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Center geodetic : 0.000000, 0.0000, 0.0000{E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 0.000000, 0.0000, 0.0000{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 : (unavailable)
Target primary : Sun {source: DE-0406LE-0406}
Interfering body: MOON (Req= 1737.400) km {source: DE-0406LE-0406}
Deflecting body : Sun, EARTH {source: DE-0406LE-0406}
Deflecting GMs : 1.3271E+11, 3.9860E+05 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 : HMS
Time format : CAL
EOP file : eop.050222.p050511
EOP coverage : DATA-BASED 1962-JAN-20 TO 2005-FEB-22. PREDICTS-> 2005-MAY-10
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 )
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Initial FK5/J2000.0 heliocentric ecliptic osculating elements (AU, DAYS, DEG):
EPOCH= 2448760.5 != 1992-May-18.0000000 (CT) Residual RMS= 1.107
EC= 1.000040099057568 QR= .6439611635664341 TP= 2448653.490730021
OM= 254.9056953807924 W= 197.8730306133652 IN= 50.02908734313758
Comet physical & dynamic parameters (KM, SEC; A1,A2,A3=AU/d^2; DT=days):
GM= n.a. RAD= n.a. A1= n.a.
A2= n.a. A3= n.a. DT= n.a.
M1= n.a. M2= n.a. k1= n.a.
k2= n.a. PHCOF= n.a.
****************************************************************************************************************************************************
Date__(UT)__HR:MN R.A.__(a-apparent)__DEC dRA*cosD d(DEC)/dt T-mag N-mag r rdot delta deldot S-O-T /r S-T-O
****************************************************************************************************************************************************
1992-Feb-26 00:00 01 33 54.08 -48 19 19.0 102.85 -146.67 n.a. n.a. 0.8296476732 21.87262 0.7743686332 9.44178 54.4534 /T 76.1342
1992-Feb-26 02:00 01 34 14.71 -48 24 11.9 102.76 -146.30 n.a. n.a. 0.8307014373 21.90680 0.7748232132 9.45006 54.5244 /T 76.0497
1992-Feb-26 04:00 01 34 35.35 -48 29 04.1 102.67 -145.93 n.a. n.a. 0.8317568406 21.94076 0.7752781877 9.45816 54.5954 /T 75.9653
1992-Feb-26 06:00 01 34 56.01 -48 33 55.6 102.58 -145.56 n.a. n.a. 0.8328138729 21.97452 0.7757335482 9.46610 54.6665 /T 75.8809
1992-Feb-26 08:00 01 35 16.69 -48 38 46.3 102.50 -145.20 n.a. n.a. 0.8338725244 22.00808 0.7761892868 9.47387 54.7376 /T 75.7967
1992-Feb-26 10:00 01 35 37.38 -48 43 36.3 102.41 -144.83 n.a. n.a. 0.8349327851 22.04143 0.7766453953 9.48148 54.8088 /T 75.7124
1992-Feb-26 12:00 01 35 58.08 -48 48 25.6 102.33 -144.47 n.a. n.a. 0.8359946451 22.07457 0.7771018659 9.48891 54.8800 /T 75.6283
1992-Feb-26 14:00 01 36 18.81 -48 53 14.2 102.24 -144.10 n.a. n.a. 0.8370580948 22.10751 0.7775586906 9.49619 54.9513 /T 75.5442
1992-Feb-26 16:00 01 36 39.54 -48 58 02.0 102.16 -143.74 n.a. n.a. 0.8381231242 22.14025 0.7780158616 9.50330 55.0227 /T 75.4602
1992-Feb-26 18:00 01 37 00.30 -49 02 49.1 102.08 -143.38 n.a. n.a. 0.8391897237 22.17279 0.7784733712 9.51026 55.0940 /T 75.3763
1992-Feb-26 20:00 01 37 21.07 -49 07 35.4 102.00 -143.01 n.a. n.a. 0.8402578835 22.20512 0.7789312117 9.51705 55.1655 /T 75.2925
1992-Feb-26 22:00 01 37 41.86 -49 12 21.1 101.92 -142.65 n.a. n.a. 0.8413275940 22.23726 0.7793893754 9.52369 55.2370 /T 75.2087
1992-Feb-27 00:00 01 38 02.67 -49 17 06.0 101.84 -142.29 n.a. n.a. 0.8423988457 22.26919 0.7798478550 9.53017 55.3085 /T 75.1250
1992-Feb-27 02:00 01 38 23.49 -49 21 50.2 101.77 -141.94 n.a. n.a. 0.8434716289 22.30093 0.7803066429 9.53650 55.3801 /T 75.0414
1992-Feb-27 04:00 01 38 44.33 -49 26 33.7 101.69 -141.58 n.a. n.a. 0.8445459342 22.33247 0.7807657318 9.54268 55.4517 /T 74.9578
1992-Feb-27 06:00 01 39 05.20 -49 31 16.5 101.62 -141.22 n.a. n.a. 0.8456217520 22.36382 0.7812251143 9.54870 55.5233 /T 74.8744
1992-Feb-27 08:00 01 39 26.07 -49 35 58.5 101.55 -140.86 n.a. n.a. 0.8466990731 22.39497 0.7816847833 9.55458 55.5950 /T 74.7910
1992-Feb-27 10:00 01 39 46.97 -49 40 39.9 101.47 -140.51 n.a. n.a. 0.8477778879 22.42592 0.7821447315 9.56031 55.6668 /T 74.7077
1992-Feb-27 12:00 01 40 07.89 -49 45 20.5 101.40 -140.15 n.a. n.a. 0.8488581871 22.45668 0.7826049519 9.56589 55.7386 /T 74.6244
1992-Feb-27 14:00 01 40 28.83 -49 50 00.5 101.34 -139.80 n.a. n.a. 0.8499399616 22.48725 0.7830654375 9.57132 55.8104 /T 74.5413
1992-Feb-27 16:00 01 40 49.78 -49 54 39.7 101.27 -139.45 n.a. n.a. 0.8510232020 22.51763 0.7835261812 9.57662 55.8823 /T 74.4582
1992-Feb-27 18:00 01 41 10.76 -49 59 18.2 101.20 -139.09 n.a. n.a. 0.8521078990 22.54782 0.7839871763 9.58177 55.9542 /T 74.3752
1992-Feb-27 20:00 01 41 31.75 -50 03 56.0 101.14 -138.74 n.a. n.a. 0.8531940437 22.57781 0.7844484160 9.58678 56.0262 /T 74.2923
1992-Feb-27 22:00 01 41 52.77 -50 08 33.1 101.07 -138.39 n.a. n.a. 0.8542816268 22.60762 0.7849098935 9.59165 56.0982 /T 74.2095
1992-Feb-28 00:00 01 42 13.80 -50 13 09.5 101.01 -138.04 n.a. n.a. 0.8553706393 22.63724 0.7853716021 9.59638 56.1703 /T 74.1267
1992-Feb-28 02:00 01 42 34.86 -50 17 45.3 100.95 -137.70 n.a. n.a. 0.8564610721 22.66667 0.7858335352 9.60098 56.2424 /T 74.0441
1992-Feb-28 04:00 01 42 55.94 -50 22 20.3 100.89 -137.35 n.a. n.a. 0.8575529163 22.69592 0.7862956864 9.60544 56.3145 /T 73.9615
1992-Feb-28 06:00 01 43 17.04 -50 26 54.6 100.83 -137.00 n.a. n.a. 0.8586461629 22.72498 0.7867580491 9.60977 56.3867 /T 73.8790
1992-Feb-28 08:00 01 43 38.16 -50 31 28.2 100.77 -136.66 n.a. n.a. 0.8597408030 22.75386 0.7872206170 9.61396 56.4589 /T 73.7966
1992-Feb-28 10:00 01 43 59.31 -50 36 01.2 100.71 -136.31 n.a. n.a. 0.8608368278 22.78255 0.7876833838 9.61803 56.5311 /T 73.7143
1992-Feb-28 12:00 01 44 20.47 -50 40 33.4 100.66 -135.97 n.a. n.a. 0.8619342285 22.81106 0.7881463432 9.62196 56.6034 /T 73.6321
1992-Feb-28 14:00 01 44 41.66 -50 45 05.0 100.60 -135.62 n.a. n.a. 0.8630329963 22.83939 0.7886094891 9.62577 56.6758 /T 73.5499
1992-Feb-28 16:00 01 45 02.87 -50 49 35.9 100.55 -135.28 n.a. n.a. 0.8641331224 22.86753 0.7890728152 9.62946 56.7481 /T 73.4679
1992-Feb-28 18:00 01 45 24.11 -50 54 06.1 100.50 -134.94 n.a. n.a. 0.8652345982 22.89550 0.7895363157 9.63301 56.8205 /T 73.3859
1992-Feb-28 20:00 01 45 45.36 -50 58 35.6 100.45 -134.60 n.a. n.a. 0.8663374150 22.92329 0.7899999844 9.63645 56.8930 /T 73.3040
1992-Feb-28 22:00 01 46 06.64 -51 03 04.4 100.40 -134.26 n.a. n.a. 0.8674415643 22.95090 0.7904638156 9.63976 56.9655 /T 73.2223
1992-Feb-29 00:00 01 46 27.95 -51 07 32.5 100.35 -133.92 n.a. n.a. 0.8685470374 22.97833 0.7909278033 9.64295 57.0380 /T 73.1406
****************************************************************************************************************************************************
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.
R.A._(a-apparent)__DEC. =
Airless apparent right ascension and declination of the target with respect
to the Earth true-equator and the meridian containing the Earth true equinox of
date. Corrected for light-time, gravitational deflection of light, stellar
aberration, precession & nutation. Units:HMS (HH MM SS.ff) and DMS (DD MM SS.f)
dRA*cosD d(DEC)/dt =
The rate of change of target apparent RA and DEC (airless). d(RA)/dt is
multiplied by the cosine of the declination. Units: ARCSECONDS PER HOUR
T-mag N-mag =
Comet's approximate apparent visual total magnitude ("T-mag") and nuclear
magnitude ("N-mag") by following definitions:
T-mag = M1 + 5*log10(delta) + k1*log10(r)
N-mag = M2 + 5*log10(delta) + k2*log10(r) + phcof*beta
Units: none
r rdot =
Target apparent heliocentric range ("r") and range-rate ("rdot") as seen
by observer. Units: AU and KM/S
delta deldot =
Target apparent range ("delta") and range-rate ("delta-dot") relative to
observer. Units: AU and KM/S
S-O-T /r =
Sun-Observer-Target angle; target's apparent solar elongation seen from
observer location at print-time. If negative, the target center is behind
the Sun. Angular units: DEGREES.
The '/r' column is a Sun-relative code, output for observing sites
with defined rotation models only.
/T indicates target trails Sun (evening sky)
/L indicates target leads Sun (morning sky)
NOTE: The S-O-T solar elongation angle is the total separation in any
direction. It does not indicate the angle of Sun leading or trailing.
S-T-O =
Sun-Target-Observer angle; target's apparent PHASE ANGLE as seen at
observer's location at print time. 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
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