API VERSION: 1.2 API SOURCE: NASA/JPL Horizons API ******************************************************************************* Revised: Sep 02, 2026 Chandra Spacecraft (X-ray observatory) / (Earth) -151 http://xrtpub.harvard.edu/index.html Chandra X-ray Observatory: Deployment (STS-93) = July 23, 1999 Data storage = 1.8 gbs Science mission = ~5 years Length (sun shade open) = 45.3 m Orbital check-out = 2 months Length (sun shade clsd) = 38.7 m ORBITAL DATA: Inclination = 28.5 degrees Orbital period = ~64 hours Apogee altitude = ~ 86,487 km Observing time / orbit = ~55 hours Perigee altitude = ~ 5,999 km WEIGHTS & PROPULSION: Dry = 10,560 lbs Propellant = 2,153 lbs Pressurant = 10 lb Total launch weight = 12,930 lb Engines = 4 Thrust per engine = 105 lb SPACECRAFT TRAJECTORY (from CFA): Trajectory after 2026-Sep-01 is a prediction Trajectory name Start Stop ---------------------------- ----------- ----------- cxo_99219_06045 1999-Aug-07 2006-Feb-14 cxo_06002_10103 2006-Feb-03 2010-Feb-25 CXO_10056_27061 2010-Feb-25 2027-Mar-02 ******************************************************************************* ******************************************************************************* Ephemeris / API_USER Sat Sep 5 01:54:30 2026 Pasadena, USA / Horizons ******************************************************************************* Target body name: Chandra Observatory (spacecraft) (-151) {source: chandra_merged} Center body name: Earth (399) {source: chandra_merged} Center-site name: Deep Random Survey, El Sauce ******************************************************************************* Start time : A.D. 2026-Sep-02 00:00:00.0000 UT Stop time : A.D. 2026-Sep-05 00:00:00.0000 UT Step-size : 10 minutes ******************************************************************************* Target pole/equ : undefined Target radii : undefined Center geodetic : 289.1467, -30.5262851, 1.74234 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 289.1467,5500.35467,-3221.64998 {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 : Earth Vis. interferer : MOON (R_eq= 1737.400) km {source: chandra_merged} Rel. light bend : Sun {source: chandra_merged} Rel. lght bnd GM: 1.3271E+11 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL Calendar mode : Mixed Julian/Gregorian RTS-only print : NO EOP file : eop.260904.p261201 EOP coverage : DATA-BASED 1962-JAN-20 TO 2026-SEP-04. PREDICTS-> 2026-NOV-30 Units conversion: 1 au= 149597870.700 km, c= 299792.458 km/s, 1 day= 86400.0 s Table cut-offs 1: Elevation ( 0.0deg=YES),Airmass (>38.000=NO), Daylight (YES) Table cut-offs 2: Solar elongation ( 12.0,180.0=YES),Local Hour Angle( 0.0=NO ) Table cut-offs 3: RA/DEC angular rate ( 0.0=NO ) *************************************************************************************************************************************************************************************************************************************************** Date__(UT)__HR:MN R.A._____(ICRF)_____DEC Azi____(a-app)___Elev APmag S-brt r rdot delta deldot S-O-T /r S-T-O T-O-M/MN_Illu% RA_3sigma DEC_3sigma Sky_motion Sky_mot_PA RelVel-ANG *************************************************************************************************************************************************************************************************************************************************** $$SOE 2026-Sep-02 00:00 17 49 20.16 +37 39 05.1 357.661693 21.778350 n.a. n.a. 1.009206181975 0.2214919 0.00091426927674 -0.3498189 97.8806 /T 82.0679 105.0/ 74.7276 n.a. n.a. 56.838938 166.63472 -29.11644 2026-Sep-02 00:10 e 17 49 31.10 +37 29 46.2 355.554915 21.807786 n.a. n.a. 1.009207066426 0.2195409 0.00091287277905 -0.3465226 97.9567 /T 81.9919 105.1/ 74.6435 n.a. n.a. 57.933829 166.77046 -28.46316 2026-Sep-02 00:20 17 49 42.15 +37 20 16.3 353.444310 21.761988 n.a. n.a. 1.009207942972 0.2175497 0.00091148951711 -0.3432230 98.0339 /T 81.9148 105.2/ 74.5600 n.a. n.a. 59.040277 166.83819 -27.82061 2026-Sep-02 00:30 17 49 53.35 +37 10 35.5 351.334210 21.640938 n.a. n.a. 1.009208811450 0.2155177 0.00091011945469 -0.3399448 98.1126 /T 81.8361 105.3/ 74.4773 n.a. n.a. 60.156265 166.84133 -27.19127 2026-Sep-02 00:40 17 50 04.76 +37 00 43.9 349.228900 21.444889 n.a. n.a. 1.009209671695 0.2134446 0.00090876245611 -0.3367129 98.1929 /T 81.7559 105.4/ 74.3953 n.a. n.a. 61.280002 166.78325 -26.57742 2026-Sep-02 00:50 17 50 16.44 +36 50 41.5 347.132558 21.174362 n.a. n.a. 1.009210523543 0.2113297 0.00090741828596 -0.3335521 98.2750 /T 81.6739 105.5/ 74.3141 n.a. n.a. 62.409914 166.66725 -25.98108 2026-Sep-02 01:00 17 50 28.43 +36 40 28.5 345.049197 20.830134 n.a. n.a. 1.009211366823 0.2091726 0.00090608660888 -0.3304873 98.3590 /T 81.5900 105.6/ 74.2337 n.a. n.a. 63.544627 166.49654 -25.40410 2026-Sep-02 01:10 17 50 40.79 +36 30 04.8 342.982624 20.413222 n.a. n.a. 1.009212201366 0.2069726 0.00090476698978 -0.3275435 98.4451 /T 81.5040 105.7/ 74.1540 n.a. n.a. 64.682962 166.27426 -24.84813 2026-Sep-02 01:20 17 50 53.57 +36 19 30.8 340.936390 19.924875 n.a. n.a. 1.009213026999 0.2047293 0.00090345889416 -0.3247453 98.5334 /T 81.4158 105.8/ 74.0753 n.a. n.a. 65.823915 166.00344 -24.31463 2026-Sep-02 01:30 17 51 06.82 +36 08 46.5 338.913759 19.366544 n.a. n.a. 1.009213843546 0.2024420 0.00090216168862 -0.3221172 98.6242 /T 81.3251 106.0/ 73.9974 n.a. n.a. 66.966652 165.68702 -23.80493 2026-Sep-02 01:40 17 51 20.58 +35 57 52.0 336.917681 18.739869 n.a. n.a. 1.009214650830 0.2001102 0.00090087464177 -0.3196837 98.7175 /T 81.2319 106.1/ 73.9204 n.a. n.a. 68.110490 165.32784 -23.32019 2026-Sep-02 01:50 17 51 34.91 +35 46 47.7 334.950769 18.046650 n.a. n.a. 1.009215448672 0.1977332 0.00089959692524 -0.3174686 98.8135 /T 81.1359 106.2/ 73.8443 n.a. n.a. 69.254888 164.92866 -22.86145 2026-Sep-02 02:00 17 51 49.84 +35 35 33.5 333.015294 17.288827 n.a. n.a. 1.009216236889 0.1953104 0.00089832761484 -0.3154958 98.9124 /T 81.0372 106.3/ 73.7692 n.a. n.a. 70.399433 164.49211 -22.42961 2026-Sep-02 02:10 17 52 05.43 +35 24 09.8 331.113176 16.468454 n.a. n.a. 1.009217015295 0.1928411 0.00089706569220 -0.3137885 99.0143 /T 80.9354 106.4/ 73.6950 n.a. n.a. 71.543830 164.02078 -22.02547 2026-Sep-02 02:20 17 52 21.72 +35 12 36.7 329.245990 15.587675 n.a. n.a. 1.009217783703 0.1903246 0.00089581004630 -0.3123696 99.1193 /T 80.8304 106.5/ 73.6217 n.a. n.a. 72.687890 163.51713 -21.64971 2026-Sep-02 02:30 17 52 38.74 +35 00 54.6 327.414978 14.648702 n.a. n.a. 1.009218541922 0.1877602 0.00089455947543 -0.3112614 99.2275 /T 80.7223 106.6/ 73.5495 n.a. n.a. 73.831514 162.98355 -21.30291 2026-Sep-02 02:40 17 52 56.54 +34 49 03.5 325.621057 13.653795 n.a. n.a. 1.009219289759 0.1851472 0.00089331268930 -0.3104858 99.3392 /T 80.6107 106.7/ 73.4782 n.a. n.a. 74.974690 162.42237 -20.98555 2026-Sep-02 02:50 17 53 15.16 +34 37 03.7 323.864840 12.605239 n.a. n.a. 1.009220027017 0.1824848 0.00089206831126 -0.3100640 99.4544 /T 80.4956 106.8/ 73.4080 n.a. n.a. 76.117474 161.83582 -20.69803 2026-Sep-02 03:00 17 53 34.63 +34 24 55.6 322.146661 11.505328 n.a. n.a. 1.009220753496 0.1797722 0.00089082488082 -0.3100165 99.5732 /T 80.3769 106.9/ 73.3387 n.a. n.a. 77.259986 161.22606 -20.44065 2026-Sep-02 03:10 m 17 53 54.99 +34 12 39.3 320.466591 10.356349 n.a. n.a. 1.009221468994 0.1770087 0.00088958085624 -0.3103633 99.6958 /T 80.2544 107.0/ 73.2705 n.a. n.a. 78.402395 160.59518 -20.21365 2026-Sep-02 03:20 m 17 54 16.26 +34 00 15.1 318.824465 9.160568 n.a. n.a. 1.009222173305 0.1741933 0.00088833461737 -0.3111236 99.8222 /T 80.1280 107.1/ 73.2033 n.a. n.a. 79.544915 159.94520 -20.01716 2026-Sep-02 03:30 m 17 54 38.49 +33 47 43.2 317.219906 7.920215 n.a. n.a. 1.009222866218 0.1713253 0.00088708446858 -0.3123158 99.9526 /T 79.9977 107.2/ 73.1371 n.a. n.a. 80.687791 159.27808 -19.85127 2026-Sep-02 03:40 m 17 55 01.70 +33 35 04.0 315.652349 6.637478 n.a. n.a. 1.009223547521 0.1684037 0.00088582864189 -0.3139575 100.0870 /T 79.8634 107.3/ 73.0719 n.a. n.a. 81.831293 158.59572 -19.71598 2026-Sep-02 03:50 m 17 55 25.92 +33 22 17.7 314.121061 5.314493 n.a. n.a. 1.009224216997 0.1654276 0.00088456530018 -0.3160656 100.2256 /T 79.7249 107.4/ 73.0078 n.a. n.a. 82.975708 157.89995 -19.61121 2026-Sep-02 04:00 m 17 55 51.17 +33 09 24.6 312.625165 3.953335 n.a. n.a. 1.009224874426 0.1623960 0.00088329254054 -0.3186560 100.3684 /T 79.5822 107.5/ 72.9447 n.a. n.a. 84.121334 157.19253 -19.53684 2026-Sep-02 04:10 m 17 56 17.48 +32 56 24.9 311.163658 2.556017 n.a. n.a. 1.009225519583 0.1593080 0.00088200839779 -0.3217438 100.5155 /T 79.4351 107.6/ 72.8826 n.a. n.a. 85.268469 156.47518 -19.49267 2026-Sep-02 04:20 m 17 56 44.87 +32 43 19.0 309.735430 1.124482 n.a. n.a. 1.009226152241 0.1561625 0.00088071084797 -0.3253433 100.6671 /T 79.2837 107.7/ 72.8215 n.a. n.a. 86.417410 155.74955 -19.47844 2026-Sep-02 04:30 m 17 57 13.35 +32 30 07.0 308.339278 -0.339398 n.a. n.a. 1.009226772165 0.1529586 0.00087939781211 -0.3294676 100.8230 /T 79.1279 107.8/ 72.7614 n.a. n.a. 87.568446 155.01723 -19.49384 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2026-Sep-02 22:40 C 21 01 43.07 -17 02 57.3 92.809414 30.120854 n.a. n.a. 1.009072146564 -2.0178225 0.00025192707055 -2.8323887 152.8356 /T 27.1574 99.3/ 65.3336 n.a. n.a. 928.69060 139.72945 -45.04239 2026-Sep-02 22:50 C 21 09 05.70 -19 06 01.4 94.652092 31.564549 n.a. n.a. 1.009063816460 -2.1377388 0.00024056146633 -2.8336723 153.7986 /T 26.1949 98.6/ 65.2321 n.a. n.a. 1016.1184 138.98959 -43.80067 2026-Sep-02 23:00 N 21 17 25.82 -21 19 18.7 96.853873 32.830783 n.a. n.a. 1.009054983940 -2.2685663 0.00022920662685 -2.8266551 154.5976 /T 25.3964 97.8/ 65.1308 n.a. n.a. 1117.1345 138.06617 -42.40274 2026-Sep-02 23:10 N 21 26 57.29 -23 43 51.2 99.457174 33.864416 n.a. n.a. 1.009045602590 -2.4116535 0.00021790083222 -2.8087332 155.1375 /T 24.8570 96.8/ 65.0299 n.a. n.a. 1234.3339 136.91345 -40.82275 2026-Sep-02 23:20 N 21 37 58.59 -26 20 36.8 102.498502 34.594331 n.a. n.a. 1.009035620277 -2.5685025 0.00020669438947 -2.7764768 155.2923 /T 24.7025 95.6/ 64.9293 n.a. n.a. 1370.7621 135.46877 -39.02973 2026-Sep-02 23:30 A 21 50 54.67 -29 10 19.1 106.000533 34.930457 n.a. n.a. 1.009024978557 -2.7407545 0.00019565341904 -2.7253863 154.9085 /T 25.0867 94.3/ 64.8292 n.a. n.a. 1529.8814 133.64504 -36.98678 2026-Sep-02 23:40 Ae 22 06 19.66 -32 13 06.0 109.961584 34.761767 n.a. n.a. 1.009013612194 -2.9301423 0.00018486470210 -2.6496109 153.8181 /T 26.1773 92.7/ 64.7295 n.a. n.a. 1715.4036 131.31988 -34.65079 2026-Sep-02 23:50 22 25 00.55 -35 27 52.2 114.344020 33.956668 n.a. n.a. 1.009001448979 -3.1383881 0.00017444166891 -2.5416715 151.8615 /T 28.1339 90.9/ 64.6303 n.a. n.a. 1930.8618 128.32048 -31.97285 2026-Sep-03 00:00 22 48 01.59 -38 51 11.6 119.065255 32.367627 n.a. n.a. 1.008988410129 -3.3670046 0.00016453132309 -2.3922972 148.9089 /L 31.0864 88.8/ 64.5316 n.a. n.a. 2178.7256 124.40519 -28.90042 2026-Sep-03 00:10 23 16 47.58 -42 15 24.4 123.996541 29.842028 n.a. n.a. 1.008974411771 -3.6169397 0.00015532124595 -2.1905994 144.8710 /L 35.1242 86.3/ 64.4335 n.a. n.a. 2458.8023 119.24913 -25.38273 2026-Sep-03 00:20 23 52 59.29 -45 25 49.4 128.973762 26.240758 n.a. n.a. 1.008959368317 -3.8879762 0.00014704457918 -1.9249878 139.7000 /L 40.2949 83.5/ 64.3360 n.a. n.a. 2765.7346 112.46091 -21.38121 2026-Sep-03 00:30 00 38 04.75 -47 57 41.1 133.819741 21.464761 n.a. n.a. 1.008943198906 -4.1777828 0.00013997893517 -1.5853784 133.3923 /L 46.6022 80.4/ 64.2392 n.a. n.a. 3085.8267 103.69758 -16.88677 2026-Sep-03 00:40 01 32 04.42 -49 15 55.8 138.371276 15.487420 n.a. n.a. 1.008925838495 -4.4805381 0.00013443305975 -1.1671206 126.0026 /L 53.9916 77.0/ 64.1431 n.a. n.a. 3394.4847 92.967158 -11.94338 2026-Sep-03 00:50 02 31 53.03 -48 43 45.1 142.501183 8.385957 n.a. n.a. 1.008907255249 -4.7852031 0.00013071478107 -0.6762032 117.6658 /L 62.3280 73.4/ 64.0478 n.a. n.a. 3657.0206 81.028028 -6.671266 2026-Sep-03 01:00 03 31 29.14 -46 01 01.8 146.128578 0.358350 n.a. n.a. 1.008887474872 -5.0739181 0.00012907889949 -0.1335109 108.6147 /L 71.3786 70.0/ 63.9532 n.a. n.a. 3835.7619 69.352386 -1.274776 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2026-Sep-03 22:40 C 16 27 02.11 +51 37 29.7 356.681673 7.772151 n.a. n.a. 1.008470896165 0.1989848 0.00087358039313 0.5983380 80.6141 /T 99.3371 101.8/ 54.3854 n.a. n.a. 60.137116 149.67128 43.293421 2026-Sep-03 22:50 Ce 16 27 34.40 +51 28 44.5 355.184388 7.772151 n.a. n.a. 1.008471698205 0.2009513 0.00087597818910 0.5973344 80.6963 /T 99.2547 101.9/ 54.2765 n.a. n.a. 60.959633 150.21143 42.778792 2026-Sep-03 23:00 N 16 28 06.53 +51 19 49.4 353.682623 7.720936 n.a. n.a. 1.008472508022 0.2028636 0.00087837217758 0.5964361 80.7787 /T 99.1722 102.0/ 54.1676 n.a. n.a. 61.804436 150.67681 42.265086 2026-Sep-03 23:10 N 16 28 38.57 +51 10 44.5 352.178446 7.618257 n.a. n.a. 1.008473325402 0.2047226 0.00088076274542 0.5956253 80.8614 /T 99.0893 102.2/ 54.0589 n.a. n.a. 62.667622 151.07023 41.753665 2026-Sep-03 23:20 N 16 29 10.59 +51 01 30.2 350.673921 7.463984 n.a. n.a. 1.008474150132 0.2065293 0.00088315020677 0.5948837 80.9446 /T 99.0059 102.3/ 53.9504 n.a. n.a. 63.545579 151.39465 41.245629 2026-Sep-03 23:30 A 16 29 42.64 +50 52 06.5 349.171100 7.258102 n.a. n.a. 1.008474982005 0.2082845 0.00088553480241 0.5941929 81.0286 /T 98.9218 102.4/ 53.8421 n.a. n.a. 64.434980 151.65311 40.741833 2026-Sep-03 23:40 A 16 30 14.79 +50 42 33.8 347.672002 7.000717 n.a. n.a. 1.008475820816 0.2099891 0.00088791669910 0.5935344 81.1134 /T 98.8368 102.6/ 53.7341 n.a. n.a. 65.332775 151.84874 40.242905 2026-Sep-03 23:50 16 30 47.10 +50 32 52.2 346.178600 6.692045 n.a. n.a. 1.008476666364 0.2116440 0.00089029598914 0.5928896 81.1994 /T 98.7508 102.7/ 53.6265 n.a. n.a. 66.236172 151.98464 39.749269 2026-Sep-04 00:00 16 31 19.62 +50 23 02.0 344.692813 6.332415 n.a. n.a. 1.008477518451 0.2132500 0.00089267269013 0.5922399 81.2865 /T 98.6635 102.9/ 53.5193 n.a. n.a. 67.142630 152.06390 39.261164 2026-Sep-04 00:10 16 31 52.42 +50 13 03.6 343.216486 5.922262 n.a. n.a. 1.008478376882 0.2148078 0.00089504674484 0.5915666 81.3751 /T 98.5748 103.0/ 53.4126 n.a. n.a. 68.049840 152.08959 38.778663 2026-Sep-04 00:20 16 32 25.54 +50 02 57.1 341.751385 5.462122 n.a. n.a. 1.008479241466 0.2163182 0.00089741802121 0.5908511 81.4652 /T 98.4845 103.1/ 53.3063 n.a. n.a. 68.955714 152.06467 38.301698 2026-Sep-04 00:30 16 32 59.04 +49 52 42.8 340.299187 4.952626 n.a. n.a. 1.008480112013 0.2177819 0.00089978631264 0.5900747 81.5570 /T 98.3925 103.3/ 53.2006 n.a. n.a. 69.858364 151.99204 37.830074 2026-Sep-04 00:40 16 33 32.96 +49 42 21.2 338.861467 4.394494 n.a. n.a. 1.008480988340 0.2191998 0.00090215133831 0.5892192 81.6507 /T 98.2987 103.4/ 53.0955 n.a. n.a. 70.756094 151.87453 37.363493 2026-Sep-04 00:50 16 34 07.34 +49 31 52.4 337.439699 3.788528 n.a. n.a. 1.008481870261 0.2205723 0.00090451274368 0.5882661 81.7464 /T 98.2029 103.6/ 52.9911 n.a. n.a. 71.647382 151.71485 36.901561 2026-Sep-04 01:00 16 34 42.23 +49 21 16.9 336.035246 3.135605 n.a. n.a. 1.008482757598 0.2219003 0.00090687010126 0.5871974 81.8442 /T 98.1049 103.7/ 52.8873 n.a. n.a. 72.530863 151.51561 36.443814 2026-Sep-04 01:10 16 35 17.68 +49 10 35.0 334.649362 2.436666 n.a. n.a. 1.008483650173 0.2231844 0.00090922291136 0.5859952 81.9443 /T 98.0047 103.9/ 52.7843 n.a. n.a. 73.405323 151.27933 35.989724 2026-Sep-04 01:20 16 35 53.70 +48 59 47.0 333.283185 1.692714 n.a. n.a. 1.008484547811 0.2244251 0.00091157060315 0.5846418 82.0467 /T 97.9021 104.0/ 52.6820 n.a. n.a. 74.269679 151.00841 35.538713 2026-Sep-04 01:30 16 36 30.35 +48 48 53.2 331.937742 0.904801 n.a. n.a. 1.008485450340 0.2256231 0.00091391253579 0.5831201 82.1517 /T 97.7970 104.2/ 52.5806 n.a. n.a. 75.122971 150.70516 35.090165 2026-Sep-04 01:40 16 37 07.65 +48 37 54.1 330.613949 0.074021 n.a. n.a. 1.008486357588 0.2267789 0.00091624799971 0.5814131 82.2592 /T 97.6893 104.3/ 52.4800 n.a. n.a. 75.964349 150.37180 34.643437 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2026-Sep-04 22:40 C 18 22 47.29 +30 13 23.0 21.721370 25.498606 n.a. n.a. 1.008590600722 0.0876932 0.00081608510616 -0.9328084 105.2581 /T 74.6970 119.6/ 43.1131 n.a. n.a. 65.893625 162.28658 -55.13063 2026-Sep-04 22:50 C 18 23 02.41 +30 02 48.0 19.590571 26.406131 n.a. n.a. 1.008590944393 0.0836677 0.00081234530303 -0.9319412 105.3602 /T 74.5951 119.7/ 43.0037 n.a. n.a. 67.048829 163.03307 -54.76116 2026-Sep-04 23:00 N 18 23 17.15 +29 51 59.2 17.402252 27.245209 n.a. n.a. 1.008591271756 0.0795610 0.00080860938381 -0.9308753 105.4622 /T 74.4933 119.9/ 42.8942 n.a. n.a. 68.256963 163.70928 -54.37163 2026-Sep-04 23:10 N 18 23 31.57 +29 40 56.4 15.158619 28.012702 n.a. n.a. 1.008591582483 0.0753713 0.00080487809759 -0.9296346 105.5643 /T 74.3914 120.1/ 42.7846 n.a. n.a. 69.514898 164.31552 -53.96457 2026-Sep-04 23:20 N 18 23 45.71 +29 29 39.4 12.862497 28.705585 n.a. n.a. 1.008591876235 0.0710964 0.00080115209614 -0.9282438 105.6667 /T 74.2893 120.3/ 42.6751 n.a. n.a. 70.819611 164.85249 -53.54244 2026-Sep-04 23:30 A 18 23 59.62 +29 18 08.1 10.517350 29.320987 n.a. n.a. 1.008592152668 0.0667343 0.00079743193096 -0.9267283 105.7695 /T 74.1867 120.5/ 42.5656 n.a. n.a. 72.168214 165.32124 -53.10762 2026-Sep-04 23:40 A 18 24 13.37 +29 06 22.0 8.127282 29.856239 n.a. n.a. 1.008592411427 0.0622829 0.00079371805069 -0.9251139 105.8730 /T 74.0834 120.7/ 42.4562 n.a. n.a. 73.557979 165.72312 -52.66241 2026-Sep-04 23:50 18 24 27.00 +28 54 21.2 5.697016 30.308919 n.a. n.a. 1.008592652150 0.0577399 0.00079001079875 -0.9234272 105.9773 /T 73.9794 120.9/ 42.3471 n.a. n.a. 74.986353 166.05972 -52.20903 2026-Sep-05 00:00 18 24 40.58 +28 42 05.4 3.231857 30.676900 n.a. n.a. 1.008592874464 0.0531031 0.00078631041092 -0.9216953 106.0827 /T 73.8742 121.2/ 42.2381 n.a. n.a. 76.450979 166.33281 -51.74961 $$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. SOLAR PRESENCE (OBSERVING SITE) Time tag is followed by a blank, then a solar-presence condition code: '*' Daylight (refracted solar upper-limb on or above apparent horizon) 'C' Civil twilight/dawn 'N' Nautical twilight/dawn 'A' Astronomical twilight/dawn ' ' Night OR geocentric ephemeris LUNAR PRESENCE WITH TARGET RISE/TRANSIT/SET EVENT MARKER (OBSERVING SITE) The solar-presence code column is immediately followed by another marker: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric The lunar presence marker (an ongoing state) can be over-ridden by a target event marker if an event has occurred since the last output step: 'r' Rise (target body on or went above cut-off RTS elevation) 'e' Elevation max (target body maximum elevation angle has occurred) 't' Transit (target body at or passed through observer meridian) 's' Set (target body on or went below cut-off RTS elevation) RTS MARKERS (TVH) Rise and set are with respect to the reference ellipsoid true visual horizon defined by the elevation cut-off angle. Horizon dip and yellow-light refraction (Earth only) are considered. Accuracy is < or = to twice the requested search step-size. 'R.A._____(ICRF)_____DEC' = Astrometric right ascension and declination of the target center with respect to the observing site (coordinate origin) in the reference frame of the planetary ephemeris (ICRF). Compensated for down-leg light-time delay aberration. Units: RA in hours-minutes-seconds of time, HH MM SS.ff{ffff} DEC in degrees-minutes-seconds of arc, sDD MN SC.f{ffff} 'Azi____(a-app)___Elev' = Airless apparent azimuth and elevation of target center. Compensated for light-time, the gravitational deflection of light, stellar aberration, precession and nutation. Azimuth is measured clockwise from north: North(0) -> East(90) -> South(180) -> West(270) -> North (360) Elevation angle is with respect to a plane perpendicular to the reference surface local zenith direction. TOPOCENTRIC ONLY. Units: DEGREES 'APmag S-brt' = The targets' approximate apparent visual magnitude and surface brightness. For planets and natural satellites, output is restricted to solar phase angles covered by observational data. Outside the observed phase angle range, "n.a." may be output to avoid extrapolation beyond the limit of model validity. For Earth-based observers, the estimated dimming due to atmospheric absorption (extinction) is available as a separate, requestable quantity. Surface brightness is the average airless visual magnitude of a square-arcsecond of the illuminated portion of the apparent disk. It is computed only if the target radius is known. Units: MAGNITUDES & MAGNITUDES PER SQUARE ARCSECOND '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 'delta deldot' = Apparent range ("delta", light-time aberrated) and range-rate ("delta-dot") of the target center relative to the observer. A positive "deldot" means the target center is moving away from the observer, negative indicates movement toward the observer. Units: AU and KM/S 'S-O-T /r' = Sun-Observer-Target apparent SOLAR ELONGATION ANGLE seen from the observers' location at print-time. The '/r' column provides a code indicating the targets' apparent position relative to the Sun in the observers' sky, as described below: Case A: For an observing location on the surface of a rotating body, that body rotational sense is considered: /T indicates target TRAILS Sun (evening sky: rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky: rises and sets BEFORE Sun) Case B: For an observing point that does not have a rotational model (such as a spacecraft), the "leading" and "trailing" condition is defined by the observers' heliocentric ORBITAL motion: * If continuing in the observers' current direction of heliocentric motion would encounter the targets' apparent longitude first, followed by the Sun's, the target LEADS the Sun as seen by the observer. * If the Sun's apparent longitude would be encountered first, followed by the targets', the target TRAILS the Sun. Two other codes can be output: /* indicates observer is Sun-centered (undefined) /? Target is aligned with Sun center (no lead or trail) The S-O-T solar elongation angle is numerically the minimum separation angle of the Sun and target in the sky in any direction. It does NOT indicate the amount of separation in the leading or trailing directions, which would be defined along the equator of a spherical coordinate system. Units: DEGREES 'S-T-O' = The Sun-Target-Observer angle; the interior vertex angle at target center formed by a vector from the target to the apparent center of the Sun (at reflection time on the target) and the apparent vector from target to the observer at print-time. Slightly different from true PHASE ANGLE (requestable separately) at the few arcsecond level in that it includes stellar aberration on the down-leg from target to observer. Units: DEGREES 'T-O-M/MN_Illu%' = Target-Observer-Moon LUNAR ELONGATION angle and illuminated percentage. The apparent lunar elongation angle between target body center and Moon center, seen from the observing site, along with fraction of the lunar disk illuminated by the Sun. A negative lunar elongation angle indicates the target center is behind the Moon. Units: DEGREES & PERCENT 'RA_3sigma DEC_3sigma' = Uncertainty in Right-Ascension and Declination. Output values are the formal +/- 3 standard-deviations (sigmas) around nominal position. Units: ARCSECONDS 'Sky_motion Sky_mot_PA RelVel-ANG' = Total apparent angular rate of the target in the plane-of-sky. "Sky_mot_PA" is the position angle of the target's direction of motion in the plane-of-sky, measured counter-clockwise from the apparent of-date north pole direction. "RelVel-ANG" is the flight path angle of the target's relative motion with respect to the observer's line-of-sight, in the range [-90,+90], where positive values indicate motion away from the observer, negative values are toward the observer: -90 = target is moving directly toward the observer 0 = target is moving at right angles to the observer's line-of-sight +90 = target is moving directly away from the observer UNITS: ARCSECONDS/MINUTE, DEGREES, DEGREES 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/horizons_batch.txt scripts https://ssd.jpl.nasa.gov/ftp/ssd/SCRIPTS Inquiries : Jon.D.Giorgini@jpl.nasa.gov ***************************************************************************************************************************************************************************************************************************************************