API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS Bradfield (C/1979 Y1) 2024-May-03 12:53:09 Rec #:90002060 (+COV) Soln.date: 2021-Apr-15_23:29:29 # obs: 127 (1979-1980) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2444263.5 ! 1980-Jan-25.0000000 (TDB) RMSW= n.a. EC= .9880381363652364 QR= .5453012379815432 TP= 2444229.1097346414 OM= 103.2155346254692 W= 257.6097304634741 IN= 148.6025329128723 A= 45.58664557893702 MA= .1101242962407069 ADIST= 90.62798991989249 PER= 307.79719450309 N= .003202194 ANGMOM= .017910679 DAN= 1.37574 DDN= .89445 L= 207.6486358 B= -30.5864473 MOID= .0671385 TP= 1979-Dec-21.6097346414 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.5 M2= n.a. k1= 14. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= JPL#9, data arc: 1979-12-26 to 1980-03-10 2: k1=14.; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Fri May 3 12:53:09 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: Bradfield (C/1979 Y1) {source: JPL#9} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2287-Jan-01 00:00:00.0000 UT Stop time : A.D. 2287-Dec-31 00:00:00.0000 UT Step-size : 120 steps ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 0.0, 0.0, -6378.137 {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 : 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.240502.p240726 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-MAY-02. PREDICTS-> 2024-JUL-25 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 ) ******************************************************************************* Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.): EPOCH= 2444263.5 ! 1980-Jan-25.0000000 (TDB) RMSW= n.a. EC= .9880381363652364 QR= .5453012379815432 TP= 2444229.1097346414 OM= 103.2155346254692 W= 257.6097304634741 IN= 148.6025329128723 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-4.880065400938132E-01 Y= 7.760881741565796E-01 Z= 1.370120436431202E-01 VX= 4.718027016861484E-03 VY= 1.950056555203065E-02 VZ= 1.514732560972823E-02 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= 8.5 M2= n.a. k1= 14. k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN:SC.fff r rdot ********************************************************* $$SOE 2287-Jan-01 00:00:00.000 1.665016888816 -26.5157226 2287-Jan-04 00:48:00.000 1.618387911302 -26.7150747 2287-Jan-07 01:36:00.000 1.571409120885 -26.9145622 2287-Jan-10 02:24:00.000 1.524081200523 -27.1130710 2287-Jan-13 03:12:00.000 1.476407053702 -27.3091668 2287-Jan-16 04:00:00.000 1.428392440975 -27.5010054 2287-Jan-19 04:48:00.000 1.380046795478 -27.6862172 2287-Jan-22 05:36:00.000 1.331384271299 -27.8617546 2287-Jan-25 06:24:00.000 1.282425097558 -28.0236926 2287-Jan-28 07:12:00.000 1.233197336234 -28.1669644 2287-Jan-31 08:00:00.000 1.183739174216 -28.2850123 2287-Feb-03 08:48:00.000 1.134101924425 -28.3693217 2287-Feb-06 09:36:00.000 1.084353970414 -28.4088028 2287-Feb-09 10:24:00.000 1.034585966412 -28.3889677 2287-Feb-12 11:12:00.000 0.984917702052 -28.2908426 2287-Feb-15 12:00:00.000 0.935507155423 -28.0895472 2287-Feb-18 12:48:00.000 0.886562374404 -27.7524790 2287-Feb-21 13:36:00.000 0.838356900523 -27.2370915 2287-Feb-24 14:24:00.000 0.791249375587 -26.4883819 2287-Feb-27 15:12:00.000 0.745707525715 -25.4365202 2287-Mar-02 16:00:00.000 0.702335481109 -23.9956643 2287-Mar-05 16:48:00.000 0.661900681690 -22.0660894 2287-Mar-08 17:36:00.000 0.625351632192 -19.5432271 2287-Mar-11 18:24:00.000 0.593810360577 -16.3382567 2287-Mar-14 19:12:00.000 0.568516196851 -12.4130801 2287-Mar-17 20:00:00.000 0.550698681237 -7.8241259 2287-Mar-20 20:48:00.000 0.541379913128 -2.7542477 2287-Mar-23 21:36:00.000 0.541153953726 2.4977935 2287-Mar-26 22:24:00.000 0.550034606338 7.5839231 2287-Mar-29 23:12:00.000 0.567451581621 12.2011399 2287-Apr-02 00:00:00.000 0.592397453587 16.1604367 2287-Apr-05 00:48:00.000 0.623647682013 19.3999181 2287-Apr-08 01:36:00.000 0.659960741397 21.9541774 2287-Apr-11 02:24:00.000 0.700208344343 23.9104614 2287-Apr-14 03:12:00.000 0.743434214210 25.3730903 2287-Apr-17 04:00:00.000 0.788863244782 26.4422375 2287-Apr-20 04:48:00.000 0.835884535400 27.2044534 2287-Apr-23 05:36:00.000 0.884024734757 27.7302994 2287-Apr-26 06:24:00.000 0.932920688016 28.0754275 2287-Apr-29 07:12:00.000 0.982295303444 28.2829208 2287-May-02 08:00:00.000 1.031937769096 28.3858076 2287-May-05 08:48:00.000 1.081687964710 28.4092996 2287-May-08 09:36:00.000 1.131424441874 28.3726249 2287-May-11 10:24:00.000 1.181055259824 28.2904661 2287-May-14 11:12:00.000 1.230511034044 28.1740614 2287-May-17 12:00:00.000 1.279739669523 28.0320389 2287-May-20 12:48:00.000 1.328702365112 27.8710433 2287-May-23 13:36:00.000 1.377370573549 27.6962082 2287-May-26 14:24:00.000 1.425723679863 27.5115103 2287-May-29 15:12:00.000 1.473747221064 27.3200369 2287-Jun-01 16:00:00.000 1.521431515127 27.1241890 2287-Jun-04 16:48:00.000 1.568770599901 26.9258348 2287-Jun-07 17:36:00.000 1.615761407626 26.7264279 2287-Jun-10 18:24:00.000 1.662403120571 26.5270973 2287-Jun-13 19:12:00.000 1.708696666497 26.3287175 2287-Jun-16 20:00:00.000 1.754644322227 26.1319629 2287-Jun-19 20:48:00.000 1.800249401190 25.9373495 2287-Jun-22 21:36:00.000 1.845516006446 25.7452681 2287-Jun-25 22:24:00.000 1.890448834927 25.5560100 2287-Jun-28 23:12:00.000 1.935053022181 25.3697873 2287-Jul-02 00:00:00.000 1.979334018894 25.1867493 2287-Jul-05 00:48:00.000 2.023297491982 25.0069951 2287-Jul-08 01:36:00.000 2.066949245735 24.8305839 2287-Jul-11 02:24:00.000 2.110295159525 24.6575439 2287-Jul-14 03:12:00.000 2.153341138637 24.4878781 2287-Jul-17 04:00:00.000 2.196093075478 24.3215699 2287-Jul-20 04:48:00.000 2.238556819197 24.1585878 2287-Jul-23 05:36:00.000 2.280738152137 23.9988879 2287-Jul-26 06:24:00.000 2.322642771960 23.8424176 2287-Jul-29 07:12:00.000 2.364276278180 23.6891172 2287-Aug-01 08:00:00.000 2.405644161585 23.5389221 2287-Aug-04 08:48:00.000 2.446751796086 23.3917638 2287-Aug-07 09:36:00.000 2.487604433137 23.2475716 2287-Aug-10 10:24:00.000 2.528207198239 23.1062733 2287-Aug-13 11:12:00.000 2.568565088935 22.9677958 2287-Aug-16 12:00:00.000 2.608682974050 22.8320660 2287-Aug-19 12:48:00.000 2.648565594053 22.6990110 2287-Aug-22 13:36:00.000 2.688217562380 22.5685588 2287-Aug-25 14:24:00.000 2.727643367338 22.4406382 2287-Aug-28 15:12:00.000 2.766847374016 22.3151795 2287-Aug-31 16:00:00.000 2.805833826100 22.1921142 2287-Sep-03 16:48:00.000 2.844606848114 22.0713755 2287-Sep-06 17:36:00.000 2.883170448177 21.9528981 2287-Sep-09 18:24:00.000 2.921528521025 21.8366186 2287-Sep-12 19:12:00.000 2.959684851265 21.7224757 2287-Sep-15 20:00:00.000 2.997643116997 21.6104099 2287-Sep-18 20:48:00.000 3.035406893602 21.5003635 2287-Sep-21 21:36:00.000 3.072979657205 21.3922807 2287-Sep-24 22:24:00.000 3.110364787474 21.2861071 2287-Sep-27 23:12:00.000 3.147565569965 21.1817900 2287-Oct-01 00:00:00.000 3.184585198567 21.0792784 2287-Oct-04 00:48:00.000 3.221426778288 20.9785226 2287-Oct-07 01:36:00.000 3.258093328140 20.8794749 2287-Oct-10 02:24:00.000 3.294587784005 20.7820891 2287-Oct-13 03:12:00.000 3.330913001654 20.6863203 2287-Oct-16 04:00:00.000 3.367071759980 20.5921256 2287-Oct-19 04:48:00.000 3.403066763982 20.4994630 2287-Oct-22 05:36:00.000 3.438900647206 20.4082924 2287-Oct-25 06:24:00.000 3.474575973876 20.3185746 2287-Oct-28 07:12:00.000 3.510095241038 20.2302721 2287-Oct-31 08:00:00.000 3.545460880846 20.1433484 2287-Nov-03 08:48:00.000 3.580675262899 20.0577683 2287-Nov-06 09:36:00.000 3.615740696506 19.9734978 2287-Nov-09 10:24:00.000 3.650659433053 19.8905039 2287-Nov-12 11:12:00.000 3.685433668596 19.8087547 2287-Nov-15 12:00:00.000 3.720065546177 19.7282194 2287-Nov-18 12:48:00.000 3.754557157443 19.6488683 2287-Nov-21 13:36:00.000 3.788910544059 19.5706722 2287-Nov-24 14:24:00.000 3.823127699187 19.4936033 2287-Nov-27 15:12:00.000 3.857210569063 19.4176344 2287-Nov-30 16:00:00.000 3.891161054608 19.3427392 2287-Dec-03 16:48:00.000 3.924981013005 19.2688924 2287-Dec-06 17:36:00.000 3.958672259399 19.1960692 2287-Dec-09 18:24:00.000 3.992236568880 19.1242462 2287-Dec-12 19:12:00.000 4.025675678273 19.0534007 2287-Dec-15 20:00:00.000 4.058991287094 18.9835105 2287-Dec-18 20:48:00.000 4.092185058114 18.9145544 2287-Dec-21 21:36:00.000 4.125258617978 18.8465115 2287-Dec-24 22:24:00.000 4.158213557866 18.7793614 2287-Dec-27 23:12:00.000 4.191051434299 18.7130841 2287-Dec-31 00:00:00.000 4.223773770066 18.6476605 $$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 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 *******************************************************************************