API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS C/1577 V1 (C/1577 V1) 2024-Apr-30 18:50:41 Rec #:90001516 Soln.date: - # obs: 24 (1577-1578) IAU76/J2000 helio. eclip. TWO-BODY elements (au, days, deg., period=Julian yrs) EPOCH= 2297356.948 ! 1577-Oct-27.4480000 (TDB) RMSW= n.a. EC= 1. QR= .1775 TP= 2297356.9479999999 OM= 31.237 W= 255.673 IN= 104.883 A= 9.999999E99 ADIST= 9.999999E99 PER= 9.999999E99 ANGMOM= .010249333 DAN= .47173 DDN= .28458 L= 166.075113 B= -69.45468459999999 TP= 1577-Oct-27.4479999998 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= n.a. M2= n.a. k1= n.a. k2= n.a. PHCOF= n.a. COMET comments 1: soln ref.= SAO_2008, data arc: 1577-11-13 to 1578-01-26 2: ; TWO_BODY;time units are UT, but set to ET; original epoch not defined, assumed ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Tue Apr 30 18:50:41 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: C/1577 V1 (C/1577 V1) {source: SAO_200820} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Jan-01 00:00:00.0000 UT Stop time : A.D. 2030-Jan-01 00:00:00.0000 UT Step-size : 1 calendar year ******************************************************************************* 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.240430.p240724 EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-30. PREDICTS-> 2024-JUL-23 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 TWO-BODY elements (au, days, deg.): EPOCH= 2297356.948 ! 1577-Oct-27.4480000 (TDB) RMSW= n.a. EC= 1. QR= .1775 TP= 2297356.9479999999 OM= 31.237 W= 255.673 IN= 104.883 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-6.046261336411469E-02 Y= 7.986842329252367E-02 Z=-1.465317622426887E-01 VX= 4.593304357361922E-02 VY= 3.499090472458800E-02 VZ= 1.189949241865272E-04 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= n.a. M1= n.a. M2= n.a. k1= n.a. k2= n.a. PHCOF= n.a. ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2023-Jan-01 00:00 324.0830295402 2.2747328 2024-Jan-01 00:00 324.5621170241 2.2707307 2025-Jan-01 00:00 325.0417943147 2.2679123 2026-Jan-01 00:00 325.5197178769 2.2665389 2027-Jan-01 00:00 325.9974567616 2.2660992 2028-Jan-01 00:00 326.4751816338 2.2662700 2029-Jan-01 00:00 326.9542594321 2.2665008 2030-Jan-01 00:00 327.4320412026 2.2662796 $$EOE ******************************************************************************* Column meaning: ** WARNING ** The initial state available for this object was a Keplerian two-body orbital element set, not osculating elements. This means the orbit is probably very poorly determined. Predictions for times many months or years from the epoch may not be suitable for high-accuracy applications or expectations. Since the epoch is inside or within ~30 days of the relatively short data arc, the elements (such as they are) were numerically propagated with perturbations, just as if they were osculating elements. 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 *******************************************************************************