API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* JPL/HORIZONS 98P/Takamizawa 2024-May-02 16:56:13 Rec #:90000936 (+COV) Soln.date: 2021-Jun-02_08:41:36 # obs: 558 (2006-2021) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2455915.5 ! 2011-Dec-20.0000000 (TDB) RMSW= n.a. EC= .560585959923109 QR= 1.672338149803353 TP= 2456509.9765022867 OM= 114.7526749114245 W= 157.9474151951102 IN= 10.5459800822991 A= 3.805836858355092 MA= 281.0842814517497 ADIST= 5.939335566906831 PER= 7.4247776777377 N= .132748255 ANGMOM= .027789923 DAN= 5.43231 DDN= 1.71747 L= 273.0376808 B= 3.9403517 MOID= .66040897 TP= 2013-Aug-05.4765022867 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.7 M1= 14.6 M2= n.a. k1= 8.75 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.409466844052E-10 A2= 6.966672837734E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 COMET comments 1: soln ref.= JPL#K203/2, data arc: 2006-03-24 to 2021-05-12 2: k1=8.75; ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Thu May 2 16:56:13 2024 Pasadena, USA / Horizons ******************************************************************************* Target body name: 98P/Takamizawa {source: JPL#K203/2} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2028-Apr-20 00:00:00.0000 UT Stop time : A.D. 2028-May-05 00:00:00.0000 UT Step-size : 180 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 2.7 km 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= 2455915.5 ! 2011-Dec-20.0000000 (TDB) RMSW= n.a. EC= .560585959923109 QR= 1.672338149803353 TP= 2456509.9765022867 OM= 114.7526749114245 W= 157.9474151951102 IN= 10.5459800822991 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-3.109045987327216E+00 Y= 2.877532539894602E+00 Z= 1.543986371679503E+00 VX=-1.628428378479734E-03 VY=-6.827602809063234E-03 VZ=-2.058288852623865E-03 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 2.7 M1= 14.6 M2= n.a. k1= 8.75 k2= n.a. PHCOF= n.a. Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 1.409466844052E-10 A2= 6.966672837734E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************* Date__(UT)__HR:MN r rdot ************************************************** $$SOE 2028-Apr-20 00:00 1.415217089197 -1.1374399 2028-Apr-20 03:00 1.415135665018 -1.1182185 2028-Apr-20 06:00 1.415055628729 -1.0989919 2028-Apr-20 09:00 1.414976980696 -1.0797604 2028-Apr-20 12:00 1.414899721279 -1.0605238 2028-Apr-20 15:00 1.414823850831 -1.0412825 2028-Apr-20 18:00 1.414749369700 -1.0220363 2028-Apr-20 21:00 1.414676278227 -1.0027855 2028-Apr-21 00:00 1.414604576747 -0.9835300 2028-Apr-21 03:00 1.414534265587 -0.9642701 2028-Apr-21 06:00 1.414465345071 -0.9450058 2028-Apr-21 09:00 1.414397815513 -0.9257371 2028-Apr-21 12:00 1.414331677225 -0.9064641 2028-Apr-21 15:00 1.414266930508 -0.8871870 2028-Apr-21 18:00 1.414203575660 -0.8679059 2028-Apr-21 21:00 1.414141612971 -0.8486207 2028-Apr-22 00:00 1.414081042727 -0.8293317 2028-Apr-22 03:00 1.414021865204 -0.8100388 2028-Apr-22 06:00 1.413964080674 -0.7907422 2028-Apr-22 09:00 1.413907689403 -0.7714420 2028-Apr-22 12:00 1.413852691650 -0.7521383 2028-Apr-22 15:00 1.413799087667 -0.7328310 2028-Apr-22 18:00 1.413746877700 -0.7135205 2028-Apr-22 21:00 1.413696061990 -0.6942066 2028-Apr-23 00:00 1.413646640769 -0.6748895 2028-Apr-23 03:00 1.413598614265 -0.6555694 2028-Apr-23 06:00 1.413551982699 -0.6362462 2028-Apr-23 09:00 1.413506746285 -0.6169201 2028-Apr-23 12:00 1.413462905231 -0.5975912 2028-Apr-23 15:00 1.413420459738 -0.5782595 2028-Apr-23 18:00 1.413379410002 -0.5589251 2028-Apr-23 21:00 1.413339756212 -0.5395882 2028-Apr-24 00:00 1.413301498550 -0.5202488 2028-Apr-24 03:00 1.413264637192 -0.5009070 2028-Apr-24 06:00 1.413229172308 -0.4815629 2028-Apr-24 09:00 1.413195104061 -0.4622166 2028-Apr-24 12:00 1.413162432607 -0.4428681 2028-Apr-24 15:00 1.413131158097 -0.4235176 2028-Apr-24 18:00 1.413101280676 -0.4041651 2028-Apr-24 21:00 1.413072800480 -0.3848108 2028-Apr-25 00:00 1.413045717641 -0.3654547 2028-Apr-25 03:00 1.413020032283 -0.3460970 2028-Apr-25 06:00 1.412995744525 -0.3267376 2028-Apr-25 09:00 1.412972854479 -0.3073767 2028-Apr-25 12:00 1.412951362250 -0.2880144 2028-Apr-25 15:00 1.412931267936 -0.2686508 2028-Apr-25 18:00 1.412912571631 -0.2492860 2028-Apr-25 21:00 1.412895273421 -0.2299199 2028-Apr-26 00:00 1.412879373385 -0.2105529 2028-Apr-26 03:00 1.412864871597 -0.1911848 2028-Apr-26 06:00 1.412851768123 -0.1718159 2028-Apr-26 09:00 1.412840063024 -0.1524462 2028-Apr-26 12:00 1.412829756354 -0.1330758 2028-Apr-26 15:00 1.412820848159 -0.1137047 2028-Apr-26 18:00 1.412813338482 -0.0943332 2028-Apr-26 21:00 1.412807227357 -0.0749612 2028-Apr-27 00:00 1.412802514812 -0.0555888 2028-Apr-27 03:00 1.412799200868 -0.0362162 2028-Apr-27 06:00 1.412797285541 -0.0168434 2028-Apr-27 09:00 1.412796768840 0.0025294 2028-Apr-27 12:00 1.412797650766 0.0219023 2028-Apr-27 15:00 1.412799931317 0.0412750 2028-Apr-27 18:00 1.412803610481 0.0606476 2028-Apr-27 21:00 1.412808688242 0.0800199 2028-Apr-28 00:00 1.412815164575 0.0993918 2028-Apr-28 03:00 1.412823039452 0.1187632 2028-Apr-28 06:00 1.412832312835 0.1381341 2028-Apr-28 09:00 1.412842984683 0.1575044 2028-Apr-28 12:00 1.412855054945 0.1768739 2028-Apr-28 15:00 1.412868523566 0.1962427 2028-Apr-28 18:00 1.412883390484 0.2156105 2028-Apr-28 21:00 1.412899655631 0.2349773 2028-Apr-29 00:00 1.412917318932 0.2543431 2028-Apr-29 03:00 1.412936380305 0.2737077 2028-Apr-29 06:00 1.412956839662 0.2930710 2028-Apr-29 09:00 1.412978696909 0.3124330 2028-Apr-29 12:00 1.413001951945 0.3317935 2028-Apr-29 15:00 1.413026604663 0.3511526 2028-Apr-29 18:00 1.413052654951 0.3705099 2028-Apr-29 21:00 1.413080102686 0.3898656 2028-Apr-30 00:00 1.413108947744 0.4092195 2028-Apr-30 03:00 1.413139189991 0.4285716 2028-Apr-30 06:00 1.413170829289 0.4479216 2028-Apr-30 09:00 1.413203865490 0.4672696 2028-Apr-30 12:00 1.413238298444 0.4866154 2028-Apr-30 15:00 1.413274127992 0.5059590 2028-Apr-30 18:00 1.413311353968 0.5253003 2028-Apr-30 21:00 1.413349976202 0.5446391 2028-May-01 00:00 1.413389994516 0.5639755 2028-May-01 03:00 1.413431408726 0.5833092 2028-May-01 06:00 1.413474218641 0.6026403 2028-May-01 09:00 1.413518424064 0.6219686 2028-May-01 12:00 1.413564024792 0.6412941 2028-May-01 15:00 1.413611020615 0.6606166 2028-May-01 18:00 1.413659411318 0.6799360 2028-May-01 21:00 1.413709196677 0.6992524 2028-May-02 00:00 1.413760376464 0.7185655 2028-May-02 03:00 1.413812950444 0.7378753 2028-May-02 06:00 1.413866918375 0.7571818 2028-May-02 09:00 1.413922280010 0.7764847 2028-May-02 12:00 1.413979035094 0.7957841 2028-May-02 15:00 1.414037183366 0.8150799 2028-May-02 18:00 1.414096724560 0.8343719 2028-May-02 21:00 1.414157658402 0.8536601 2028-May-03 00:00 1.414219984613 0.8729443 2028-May-03 03:00 1.414283702906 0.8922246 2028-May-03 06:00 1.414348812989 0.9115008 2028-May-03 09:00 1.414415314565 0.9307728 2028-May-03 12:00 1.414483207327 0.9500405 2028-May-03 15:00 1.414552490965 0.9693039 2028-May-03 18:00 1.414623165161 0.9885628 2028-May-03 21:00 1.414695229592 1.0078172 2028-May-04 00:00 1.414768683926 1.0270670 2028-May-04 03:00 1.414843527829 1.0463121 2028-May-04 06:00 1.414919760956 1.0655524 2028-May-04 09:00 1.414997382960 1.0847878 2028-May-04 12:00 1.415076393485 1.1040183 2028-May-04 15:00 1.415156792169 1.1232437 2028-May-04 18:00 1.415238578645 1.1424640 2028-May-04 21:00 1.415321752539 1.1616790 2028-May-05 00:00 1.415406313470 1.1808888 $$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 *******************************************************************************