******************************************************************************* JPL/HORIZONS McNaught (C/2008 J4) 2024-Apr-27 00:25:33 Rec #:90003980 (+COV) Soln.date: 2021-Apr-15_23:31:19 # obs: 22 (15 days) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2454603.5 ! 2008-May-17.0000000 (TDB) RMSW= n.a. EC= 1.007714282012768 QR= .4492653739957159 TP= 2454636.8952154657 OM= 289.3723259881712 W= 93.05580369126282 IN= 87.47745008862317 A= -58.23813198067299 MA= -.07405888502011827 ADIST= 9.999999E99 PER= 9.999999E99 N= .00221765 ANGMOM= .016337435 DAN= .9532 DDN= .85601 L= 69.8686041 B= 86.0382884 MOID= .043474 TP= 2008-Jun-19.3952154657 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 16.5 M2= 18.2 k1= 12.75 k2= 5. PHCOF= .030 COMET comments 1: soln ref.= JPL#11, data arc: 2008-05-10 to 2008-05-25 2: k1=12.75, k2=5., phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sat Apr 27 00:25:33 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: McNaught (C/2008 J4) {source: JPL#11} Center body name: Sun (10) {source: DE441} Center-site name: BODYCENTRIC ******************************************************************************* Start time : A.D. 1830-Nov-01 00:00:00.0000 UT Stop time : A.D. 1880-Jan-01 00:00:00.0000 UT Step-size : 90 steps ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -695700.0 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.0, 0.0, 0.0 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : IAU_SUN {East-longitude positive} Center radii : 695700.0, 695700.0, 695700.0 km {Equator_a, b, pole_c} Target primary : Sun Vis. interferer : None 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.240426.p240720 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-26. PREDICTS-> 2024-JUL-19 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 n.a. , 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 ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2454603.5 ! 2008-May-17.0000000 (TDB) RMSW= n.a. EC= 1.007714282012768 QR= .4492653739957159 TP= 2454636.8952154657 OM= 289.3723259881712 W= 93.05580369126282 IN= 87.47745008862317 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X= 3.027317360745549E-01 Y=-8.015445197312613E-01 Z=-3.016491010700077E-01 VX=-5.613510899533636E-03 VY= 9.928410194266100E-03 VZ= 2.294622266872703E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 16.5 M2= 18.2 k1= 12.75 k2= 5. PHCOF= .030 ********************************************************************************** Date__(UT)__HR:MN:SC.fff r rdot VmagSn VmagOb ********************************************************************************** $$SOE 1830-Nov-01 00:00:00.000 224.4591982084 -4.7631053 4.7647583 4.7647651 1831-May-19 12:48:00.000 223.9101319554 -4.7657953 4.7673715 4.7673785 1831-Dec-05 01:36:00.000 223.3607553267 -4.7684618 4.7699638 4.7699680 1832-Jun-21 14:24:00.000 222.8110858290 -4.7709504 4.7723987 4.7724021 1833-Jan-07 03:12:00.000 222.2611398389 -4.7732169 4.7746388 4.7746384 1833-Jul-25 16:00:00.000 221.7109491961 -4.7752484 4.7766720 4.7766715 1834-Feb-10 04:48:00.000 221.1605370562 -4.7770035 4.7784663 4.7784626 1834-Aug-28 17:36:00.000 220.6099327621 -4.7786036 4.7801286 4.7801229 1835-Mar-16 06:24:00.000 220.0591537769 -4.7799917 4.7816083 4.7816006 1835-Oct-01 19:12:00.000 219.5082140784 -4.7814013 4.7831113 4.7831028 1836-Apr-18 08:00:00.000 218.9571165799 -4.7827560 4.7845706 4.7845622 1836-Nov-03 20:48:00.000 218.4058560946 -4.7842439 4.7861511 4.7861417 1837-May-22 09:36:00.000 217.8544249000 -4.7857869 4.7877804 4.7877745 1837-Dec-07 22:24:00.000 217.3028034557 -4.7875269 4.7895862 4.7895819 1838-Jun-25 11:12:00.000 216.7509766821 -4.7894094 4.7915193 4.7915189 1839-Jan-11 00:00:00.000 216.1989188796 -4.7914664 4.7936087 4.7936088 1839-Jul-29 12:48:00.000 215.6466126984 -4.7937411 4.7958891 4.7958930 1840-Feb-14 01:36:00.000 215.0940305748 -4.7961812 4.7983167 4.7983211 1840-Aug-31 14:24:00.000 214.5411547188 -4.7988640 4.8009571 4.8009627 1841-Mar-19 03:12:00.000 213.9879627330 -4.8016474 4.8036849 4.8036908 1841-Oct-04 16:00:00.000 213.4344384927 -4.8046545 4.8066065 4.8066138 1842-Apr-22 04:48:00.000 212.8805684592 -4.8076788 4.8095416 4.8095503 1842-Nov-07 17:36:00.000 212.3263441959 -4.8107929 4.8125542 4.8125618 1843-May-26 06:24:00.000 211.7717681056 -4.8138068 4.8154756 4.8154848 1843-Dec-11 19:12:00.000 211.2168440062 -4.8167521 4.8183366 4.8183434 1844-Jun-28 08:00:00.000 210.6615932713 -4.8194923 4.8210181 4.8210237 1845-Jan-13 20:48:00.000 210.1060352262 -4.8219989 4.8234974 4.8234973 1845-Aug-01 09:36:00.000 209.5502029661 -4.8242874 4.8257865 4.8257848 1846-Feb-16 22:24:00.000 208.9941208903 -4.8263021 4.8278403 4.8278345 1846-Sep-04 11:12:00.000 208.4378187828 -4.8281817 4.8297795 4.8297723 1847-Mar-23 00:00:00.000 207.8813130763 -4.8298558 4.8315427 4.8315341 1847-Oct-08 12:48:00.000 207.3246153726 -4.8315452 4.8333229 4.8333153 1848-Apr-25 01:36:00.000 206.7677285007 -4.8331623 4.8350445 4.8350386 1848-Nov-10 14:24:00.000 206.2106458434 -4.8349115 4.8368875 4.8368816 1849-May-29 03:12:00.000 205.6533588505 -4.8367212 4.8387866 4.8387831 1849-Dec-14 16:00:00.000 205.0958479143 -4.8387243 4.8408594 4.8408558 1850-Jul-02 04:48:00.000 204.5380995481 -4.8408928 4.8430792 4.8430780 1851-Jan-17 17:36:00.000 203.9800881407 -4.8432486 4.8454661 4.8454640 1851-Aug-05 06:24:00.000 203.4217969319 -4.8458213 4.8480411 4.8480424 1852-Feb-20 19:12:00.000 202.8632004940 -4.8485298 4.8507361 4.8507388 1852-Sep-07 08:00:00.000 202.3042817666 -4.8514668 4.8536303 4.8536359 1853-Mar-25 20:48:00.000 201.7450192844 -4.8544704 4.8565834 4.8565900 1853-Oct-11 09:36:00.000 201.1853984420 -4.8576569 4.8596941 4.8597022 1854-Apr-28 22:24:00.000 200.6254090792 -4.8608434 4.8628050 4.8628138 1854-Nov-14 11:12:00.000 200.0650441328 -4.8641156 4.8659906 4.8659972 1855-Jun-02 00:00:00.000 199.5043092679 -4.8672795 4.8690808 4.8690863 1855-Dec-18 12:48:00.000 198.9432119890 -4.8703535 4.8720926 4.8720948 1856-Jul-05 01:36:00.000 198.3817763355 -4.8732272 4.8749304 4.8749317 1857-Jan-20 14:24:00.000 197.8200224625 -4.8758475 4.8775503 4.8775475 1857-Aug-08 03:12:00.000 197.2579841816 -4.8782276 4.8799619 4.8799586 1858-Feb-23 16:00:00.000 196.6956855188 -4.8803264 4.8821331 4.8821278 1858-Sep-11 04:48:00.000 196.1331526696 -4.8823147 4.8842133 4.8842075 1859-Mar-29 17:36:00.000 195.5703992705 -4.8841212 4.8861421 4.8861343 1859-Oct-15 06:24:00.000 195.0074338900 -4.8859795 4.8881200 4.8881119 1860-May-01 19:12:00.000 194.4442561414 -4.8878273 4.8900944 4.8900870 1860-Nov-17 08:00:00.000 193.8808549384 -4.8898519 4.8922273 4.8922195 1861-Jun-04 20:48:00.000 193.3172196440 -4.8919661 4.8944410 4.8944352 1861-Dec-21 09:36:00.000 192.7533275937 -4.8942866 4.8968359 4.8968316 1862-Jul-08 22:24:00.000 192.1891616045 -4.8967940 4.8993955 4.8993952 1863-Jan-24 11:12:00.000 191.6246931234 -4.8994798 4.9021134 4.9021140 1863-Aug-12 00:00:00.000 191.0599034800 -4.9023927 4.9050292 4.9050327 1864-Feb-27 12:48:00.000 190.4947647983 -4.9054627 4.9080827 4.9080874 1864-Sep-14 01:36:00.000 189.9292573357 -4.9087949 4.9113638 4.9113697 1865-Apr-01 14:24:00.000 189.3633596256 -4.9122161 4.9147227 4.9147283 1865-Oct-18 03:12:00.000 188.7970559057 -4.9158436 4.9182577 4.9182636 1866-May-05 16:00:00.000 188.2303354038 -4.9194857 4.9218046 4.9218117 1866-Nov-21 04:48:00.000 187.6631906991 -4.9231913 4.9254049 4.9254111 1867-Jun-08 17:36:00.000 187.0956289220 -4.9267718 4.9288969 4.9289030 1867-Dec-25 06:24:00.000 186.5276571065 -4.9302331 4.9322843 4.9322886 1868-Jul-11 19:12:00.000 185.9592995740 -4.9334864 4.9354943 4.9354978 1869-Jan-27 08:00:00.000 185.3905775189 -4.9364766 4.9384801 4.9384796 1869-Aug-14 20:48:00.000 184.8215242031 -4.9392625 4.9412940 4.9412911 1870-Mar-02 09:36:00.000 184.2521621321 -4.9417967 4.9438953 4.9438896 1870-Sep-17 22:24:00.000 183.6825156281 -4.9442527 4.9464353 4.9464284 1871-Apr-05 11:12:00.000 183.1125971295 -4.9465553 4.9488489 4.9488411 1871-Oct-22 00:00:00.000 182.5424113041 -4.9489229 4.9513234 4.9513162 1872-May-08 12:48:00.000 181.9719556649 -4.9512781 4.9537927 4.9537878 1872-Nov-24 01:36:00.000 181.4012174359 -4.9537953 4.9564078 4.9564037 1873-Jun-11 14:24:00.000 180.8301847026 -4.9564189 4.9591206 4.9591184 1873-Dec-28 03:12:00.000 180.2588330574 -4.9592452 4.9620118 4.9620101 1874-Jul-15 16:00:00.000 179.6871459363 -4.9622750 4.9650824 4.9650831 1875-Jan-31 04:48:00.000 179.1150957168 -4.9654965 4.9683215 4.9683221 1875-Aug-18 17:36:00.000 178.5426634642 -4.9689683 4.9717782 4.9717802 1876-Mar-05 06:24:00.000 177.9698225490 -4.9725752 4.9753511 4.9753546 1876-Sep-20 19:12:00.000 177.3965548017 -4.9764232 4.9791321 4.9791378 1877-Apr-08 08:00:00.000 176.8228402001 -4.9803349 4.9829687 4.9829758 1877-Oct-24 20:48:00.000 176.2486635122 -4.9844120 4.9869468 4.9869542 1878-May-12 09:36:00.000 175.6740176085 -4.9884639 4.9909028 4.9909113 1878-Nov-27 22:24:00.000 175.0988979160 -4.9925571 4.9948943 4.9949009 1879-Jun-15 11:12:00.000 174.5233147131 -4.9965263 4.9987808 4.9987859 1880-Jan-01 00:00:00.000 173.9472786517 -5.0003446 5.0025378 5.0025392 $$EOE ********************************************************************************** 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. 'r rdot' = The Sun's apparent range ("r", light-time aberrated) and range-rate ("rdot") relative to the target center, as seen by the observer. A positive "rdot" means the target center was moving away from the Sun, negative means moving toward the Sun. Units: AU and KM/S 'VmagSn VmagOb' = Magnitude of target centers' velocity with respect to the Sun ("VmagSn") and the observer ("VmagOb") at the time light left the target center to be observed (print time minus down-leg light-time). These are absolute values of the velocity vectors (total speeds) and do NOT indicate direction of motion. Units: 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 ********************************************************************************** !$$SOF COMMAND = '2008 J4' START_TIME = '1830-11-01' STOP_TIME = '1880-01-01' STEP_SIZE = '90' QUANTITIES = '19,22' CENTER = '@Sun'