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 Wed Sep 16 12:14:08 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: Swan Reach Imaging, Glenalta ******************************************************************************* 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 : 139.5701, -34.5440227, .056888 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 139.5701,5259.32258,-3596.34777 {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.260915.p261212 EOP coverage : DATA-BASED 1962-JAN-20 TO 2026-SEP-15. PREDICTS-> 2026-DEC-11 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 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< 2026-Sep-02 08:30 C 18 29 29.42 +28 42 19.4 27.149132 21.030078 n.a. n.a. 1.009237137452 0.0550397 0.00079329841671 -1.0528789 108.5289 /T 71.4281 105.6/ 71.4397 n.a. n.a. 70.665729 158.70048 -57.23550 2026-Sep-02 08:40 C 18 29 48.55 +28 31 13.4 25.146506 22.079240 n.a. n.a. 1.009237347931 0.0499004 0.00078907329198 -1.0538641 108.6556 /T 71.3017 105.7/ 71.3461 n.a. n.a. 71.770171 159.52053 -56.99432 2026-Sep-02 08:50 N 18 30 07.24 +28 19 53.2 23.088623 23.070993 n.a. n.a. 1.009237537592 0.0446578 0.00078484466667 -1.0546274 108.7822 /T 71.1754 105.9/ 71.2529 n.a. n.a. 72.938257 160.28229 -56.73085 2026-Sep-02 09:00 N 18 30 25.53 +28 08 18.6 20.976158 24.002423 n.a. n.a. 1.009237706014 0.0393092 0.00078061338730 -1.0551907 108.9089 /T 71.0490 106.0/ 71.1600 n.a. n.a. 74.167571 160.98476 -56.44713 2026-Sep-02 09:10 N 18 30 43.48 +27 56 29.3 18.810230 24.870628 n.a. n.a. 1.009237852766 0.0338517 0.00077638021149 -1.0555764 109.0358 /T 70.9223 106.1/ 71.0675 n.a. n.a. 75.455689 161.62735 -56.14522 2026-Sep-02 09:20 A 18 31 01.13 +27 44 24.9 16.592441 25.672754 n.a. n.a. 1.009237977407 0.0282825 0.00077214580477 -1.0558079 109.1632 /T 70.7952 106.2/ 70.9754 n.a. n.a. 76.800221 162.20987 -55.82714 2026-Sep-02 09:30 A 18 31 18.53 +27 32 05.3 14.324904 26.406028 n.a. n.a. 1.009238079481 0.0225984 0.00076791073755 -1.0559093 109.2912 /T 70.6675 106.4/ 70.8838 n.a. n.a. 78.198837 162.73246 -55.49487 2026-Sep-02 09:40 A 18 31 35.72 +27 19 30.0 12.010263 27.067791 n.a. n.a. 1.009238158523 0.0167964 0.00076367548221 -1.0559054 109.4200 /T 70.5389 106.5/ 70.7926 n.a. n.a. 79.649300 163.19562 -55.15036 2026-Sep-02 09:50 18 31 52.77 +27 06 38.9 9.651701 27.655538 n.a. n.a. 1.009238214052 0.0108731 0.00075944041040 -1.0558215 109.5498 /T 70.4094 106.6/ 70.7020 n.a. n.a. 81.149485 163.60009 -54.79550 2026-Sep-02 10:00 18 32 09.73 +26 53 31.6 7.252937 28.166958 n.a. n.a. 1.009238245575 0.0048251 0.00075520579048 -1.0556839 109.6808 /T 70.2787 106.8/ 70.6119 n.a. n.a. 82.697405 163.94686 -54.43213 2026-Sep-02 10:10 18 32 26.64 +26 40 08.0 4.818200 28.599971 n.a. n.a. 1.009238252585 -0.0013511 0.00075097178515 -1.0555190 109.8131 /T 70.1465 106.9/ 70.5225 n.a. n.a. 84.291230 164.23713 -54.06202 2026-Sep-02 10:20 18 32 43.56 +26 26 27.8 2.352194 28.952769 n.a. n.a. 1.009238234561 -0.0076594 0.00074673844931 -1.0553540 109.9471 /T 70.0128 107.1/ 70.4336 n.a. n.a. 85.929297 164.47226 -53.68688 2026-Sep-02 10:30 t 18 33 00.56 +26 12 30.8 359.860047 29.223845 n.a. n.a. 1.009238190964 -0.0141035 0.00074250572800 -1.0552166 110.0829 /T 69.8773 107.2/ 70.3455 n.a. n.a. 87.610131 164.65378 -53.30833 2026-Sep-02 10:40 18 33 17.68 +25 58 16.7 357.347233 29.412030 n.a. n.a. 1.009238121241 -0.0206876 0.00073827345472 -1.0551347 110.2207 /T 69.7397 107.4/ 70.2581 n.a. n.a. 89.332448 164.78330 -52.92797 2026-Sep-02 10:50 18 33 34.99 +25 43 45.4 354.819497 29.516511 n.a. n.a. 1.009238024825 -0.0274158 0.00073404134982 -1.0551368 110.3607 /T 69.6000 107.5/ 70.1714 n.a. n.a. 91.095171 164.86256 -52.54727 2026-Sep-02 11:00 e 18 33 52.54 +25 28 56.6 352.282751 29.536856 n.a. n.a. 1.009237901126 -0.0342926 0.00072980901921 -1.0552515 110.5032 /T 69.4578 107.6/ 70.0854 n.a. n.a. 92.897431 164.89335 -52.16768 2026-Sep-02 11:10 18 34 10.39 +25 13 50.2 349.742978 29.473019 n.a. n.a. 1.009237749540 -0.0413226 0.00072557595320 -1.0555077 110.6483 /T 69.3129 107.8/ 70.0003 n.a. n.a. 94.738576 164.87754 -51.79055 2026-Sep-02 11:20 18 34 28.60 +24 58 26.0 347.206121 29.325348 n.a. n.a. 1.009237569444 -0.0485105 0.00072134152565 -1.0559346 110.7963 /T 69.1652 107.9/ 69.9160 n.a. n.a. 96.618171 164.81702 -51.41717 2026-Sep-02 11:30 18 34 47.24 +24 42 43.8 344.677980 29.094575 n.a. n.a. 1.009237360194 -0.0558614 0.00071710499332 -1.0565615 110.9473 /T 69.0144 108.1/ 69.8325 n.a. n.a. 98.536005 164.71372 -51.04874 2026-Sep-02 11:40 18 35 06.36 +24 26 43.5 342.164112 28.781805 n.a. n.a. 1.009237121126 -0.0633805 0.00071286549546 -1.0574176 111.1017 /T 68.8603 108.2/ 69.7500 n.a. n.a. 100.49209 164.56961 -50.68643 2026-Sep-02 11:50 18 35 26.02 +24 10 24.8 339.669741 28.388498 n.a. n.a. 1.009236851553 -0.0710734 0.00070862205362 -1.0585323 111.2597 /T 68.7026 108.4/ 69.6683 n.a. n.a. 102.48666 164.38665 -50.33129 2026-Sep-02 12:00 18 35 46.29 +23 53 47.8 337.199678 27.916438 n.a. n.a. 1.009236550768 -0.0789458 0.00070437357171 -1.0599349 111.4213 /T 68.5412 108.6/ 69.5876 n.a. n.a. 104.52018 164.16680 -49.98434 2026-Sep-02 12:10 18 36 07.22 +23 36 52.1 334.758262 27.367706 n.a. n.a. 1.009236218039 -0.0870037 0.00070011883626 -1.0616547 111.5870 /T 68.3758 108.7/ 69.5078 n.a. n.a. 106.59333 163.91204 -49.64652 2026-Sep-02 12:20 18 36 28.88 +23 19 37.7 332.349309 26.744642 n.a. n.a. 1.009235852609 -0.0952534 0.00069585651697 -1.0637206 111.7569 /T 68.2062 108.9/ 69.4290 n.a. n.a. 108.70701 163.62434 -49.31870 2026-Sep-02 12:30 18 36 51.32 +23 02 04.4 329.976088 26.049811 n.a. n.a. 1.009235453695 -0.1037016 0.00069158516748 -1.0661615 111.9313 /T 68.0321 109.0/ 69.3511 n.a. n.a. 110.86235 163.30564 -49.00168 2026-Sep-02 12:40 18 37 14.61 +22 44 12.1 327.641301 25.285961 n.a. n.a. 1.009235020488 -0.1123551 0.00068730322624 -1.0690060 112.1103 /T 67.8533 109.2/ 69.2743 n.a. n.a. 113.06071 162.95790 -48.69619 2026-Sep-02 12:50 18 37 38.81 +22 26 00.6 325.347088 24.455990 n.a. n.a. 1.009234552150 -0.1212213 0.00068300901777 -1.0722823 112.2942 /T 67.6697 109.3/ 69.1985 n.a. n.a. 115.30364 162.58303 -48.40291 2026-Sep-02 13:00 18 38 03.97 +22 07 29.8 323.095040 23.562908 n.a. n.a. 1.009234047813 -0.1303079 0.00067870075405 -1.0760182 112.4833 /T 67.4808 109.4/ 69.1237 n.a. n.a. 117.59293 162.18294 -48.12243 2026-Sep-02 13:10 18 38 30.17 +21 48 39.5 320.886220 22.609801 n.a. n.a. 1.009233506576 -0.1396227 0.00067437653604 -1.0802414 112.6778 /T 67.2867 109.6/ 69.0499 n.a. n.a. 119.93058 161.75953 -47.85530 2026-Sep-02 13:20 18 38 57.45 +21 29 29.6 318.721197 21.599804 n.a. n.a. 1.009232927508 -0.1491744 0.00067003435551 -1.0849786 112.8778 /T 67.0869 109.7/ 68.9772 n.a. n.a. 122.31881 161.31465 -47.60198 2026-Sep-02 13:30 18 39 25.89 +21 09 59.8 316.600084 20.536072 n.a. n.a. 1.009232309640 -0.1589717 0.00066567209697 -1.0902565 113.0838 /T 66.8812 109.9/ 68.9055 n.a. n.a. 124.76005 160.85014 -47.36288 2026-Sep-02 13:40 18 39 55.53 +20 50 10.1 314.522578 19.421756 n.a. n.a. 1.009231651970 -0.1690241 0.00066128753978 -1.0961009 113.2957 /T 66.6695 110.0/ 68.8348 n.a. n.a. 127.25695 160.36783 -47.13835 2026-Sep-02 13:50 18 40 26.44 +20 30 00.2 312.488001 18.259983 n.a. n.a. 1.009230953454 -0.1793413 0.00065687836048 -1.1025372 113.5141 /T 66.4515 110.2/ 68.7653 n.a. n.a. 129.81240 159.86949 -46.92866 2026-Sep-02 14:00 m 18 40 58.67 +20 09 30.0 310.495347 17.053841 n.a. n.a. 1.009230213009 -0.1899339 0.00065244213511 -1.1095901 113.7389 /T 66.2269 110.3/ 68.6967 n.a. n.a. 132.42949 159.35688 -46.73404 2026-Sep-02 14:10 m 18 41 32.29 +19 48 39.1 308.543318 15.806362 n.a. n.a. 1.009229429510 -0.2008127 0.00064797634180 -1.1172838 113.9706 /T 65.9956 110.4/ 68.6293 n.a. n.a. 135.11155 158.83172 -46.55463 2026-Sep-02 14:20 m 18 42 07.35 +19 27 27.3 306.630367 14.520519 n.a. n.a. 1.009228601785 -0.2119893 0.00064347836347 -1.1256416 114.2093 /T 65.7571 110.6/ 68.5628 n.a. n.a. 137.86214 158.29570 -46.39052 2026-Sep-02 14:30 m 18 42 43.91 +19 05 54.5 304.754729 13.199211 n.a. n.a. 1.009227728616 -0.2234759 0.00063894549044 -1.1346862 114.4553 /T 65.5115 110.7/ 68.4974 n.a. n.a. 140.68508 157.75046 -46.24176 2026-Sep-02 14:40 m 18 43 22.04 +18 44 00.1 302.914460 11.845267 n.a. n.a. 1.009226808734 -0.2352855 0.00063437492338 -1.1444397 114.7088 /T 65.2583 110.8/ 68.4331 n.a. n.a. 143.58443 157.19763 -46.10831 2026-Sep-02 14:50 m 18 44 01.78 +18 21 44.1 301.107457 10.461437 n.a. n.a. 1.009225840815 -0.2474317 0.00062976377613 -1.1549233 114.9700 /T 64.9973 110.9/ 68.3697 n.a. n.a. 146.56452 156.63876 -45.99009 2026-Sep-02 15:00 m 18 44 43.19 +17 59 05.9 299.331491 9.050397 n.a. n.a. 1.009224823482 -0.2599291 0.00062510907861 -1.1661577 115.2393 /T 64.7283 111.1/ 68.3074 n.a. n.a. 149.62998 156.07540 -45.88697 2026-Sep-02 15:10 m 18 45 26.34 +17 36 05.2 297.584223 7.614750 n.a. n.a. 1.009223755295 -0.2727929 0.00062040777977 -1.1781625 115.5169 /T 64.4510 111.2/ 68.2460 n.a. n.a. 152.78572 155.50901 -45.79874 2026-Sep-02 15:20 m 18 46 11.29 +17 12 41.6 295.863223 6.157029 n.a. n.a. 1.009222634752 -0.2860395 0.00061565675062 -1.1909569 115.8031 /T 64.1652 111.3/ 68.1857 n.a. n.a. 156.03699 154.94105 -45.72516 2026-Sep-02 15:30 m 18 46 58.09 +16 48 54.5 294.165983 4.679700 n.a. n.a. 1.009221460284 -0.2996862 0.00061085278703 -1.2045592 116.0980 /T 63.8706 111.4/ 68.1263 n.a. n.a. 159.38940 154.37288 -45.66593 2026-Sep-02 15:40 m 18 47 46.80 +16 24 43.5 292.489932 3.185172 n.a. n.a. 1.009220230249 -0.3137512 0.00060599261271 -1.2189871 116.4020 /T 63.5669 111.5/ 68.0678 n.a. n.a. 162.84892 153.80584 -45.62071 2026-Sep-02 15:50 m 18 48 37.49 +16 00 08.0 290.832440 1.675801 n.a. n.a. 1.009218942931 -0.3282542 0.00060107288212 -1.2342575 116.7153 /T 63.2539 111.6/ 68.0102 n.a. n.a. 166.42194 153.24121 -45.58909 2026-Sep-02 16:00 m 18 49 30.21 +15 35 07.4 289.190824 0.153900 n.a. n.a. 1.009217596532 -0.3432160 0.00059609018311 -1.2503867 117.0382 /T 62.9313 111.7/ 67.9535 n.a. n.a. 170.11531 152.68020 -45.57065 >..... Elevation Cut-off Requested .....< >..... Daylight Cut-off Requested .....< >..... Elevation Cut-off Requested .....< 2026-Sep-04 08:30 C 17 23 01.29 +43 38 45.4 7.663054 11.257155 n.a. n.a. 1.008525756747 0.2428354 0.00094602592024 -0.0269875 90.6205 /T 89.3258 108.2/ 49.7922 n.a. n.a. 48.111653 159.16554 -2.812655 2026-Sep-04 08:40 C 17 23 16.77 +43 31 10.2 5.891489 11.619666 n.a. n.a. 1.008526730118 0.2425397 0.00094592084694 -0.0253802 90.6871 /T 89.2591 108.3/ 49.6836 n.a. n.a. 48.936745 159.85754 -2.601495 2026-Sep-04 08:50 C 17 23 31.99 +43 23 25.3 4.101470 11.923298 n.a. n.a. 1.008527702240 0.2422133 0.00094582252004 -0.0236267 90.7537 /T 89.1925 108.4/ 49.5749 n.a. n.a. 49.791341 160.46254 -2.381109 2026-Sep-04 09:00 N 17 23 47.03 +43 15 30.6 2.295390 12.167078 n.a. n.a. 1.008528672991 0.2418560 0.00094573148642 -0.0217468 90.8204 /T 89.1258 108.6/ 49.4663 n.a. n.a. 50.671729 160.98306 -2.154450 2026-Sep-04 09:10 N 17 24 01.93 +43 07 26.0 0.475758 12.350172 n.a. n.a. 1.008529642248 0.2414679 0.00094564821278 -0.0197607 90.8874 /T 89.0589 108.7/ 49.3577 n.a. n.a. 51.574437 161.42193 -1.924265 2026-Sep-04 09:20 At 17 24 16.75 +42 59 11.7 358.645181 12.471901 n.a. n.a. 1.008530609886 0.2410490 0.00094557308428 -0.0176888 90.9548 /T 88.9915 108.8/ 49.2493 n.a. n.a. 52.496239 161.78223 -1.693091 2026-Sep-04 09:30 A 17 24 31.55 +42 50 47.6 356.806342 12.531745 n.a. n.a. 1.008531575782 0.2405993 0.00094550640328 -0.0155519 91.0227 /T 88.9236 109.0/ 49.1410 n.a. n.a. 53.434154 162.06720 -1.463264 2026-Sep-04 09:40 Ae 17 24 46.37 +42 42 13.8 354.961973 12.529346 n.a. n.a. 1.008532539813 0.2401187 0.00094544838820 -0.0133711 91.0914 /T 88.8548 109.1/ 49.0330 n.a. n.a. 54.385445 162.28018 -1.236927 2026-Sep-04 09:50 17 25 01.27 +42 33 30.4 353.114827 12.464516 n.a. n.a. 1.008533501854 0.2396074 0.00094539917273 -0.0111676 91.1611 /T 88.7852 109.2/ 48.9252 n.a. n.a. 55.347607 162.42456 -1.016045 2026-Sep-04 10:00 17 25 16.31 +42 24 37.4 351.267655 12.337236 n.a. n.a. 1.008534461783 0.2390651 0.00094535880504 -0.0089628 91.2318 /T 88.7145 109.4/ 48.8178 n.a. n.a. 56.318368 162.50371 -0.802414 2026-Sep-04 10:10 17 25 31.53 +42 15 35.0 349.423177 12.147654 n.a. n.a. 1.008535419475 0.2384919 0.00094532724728 -0.0067782 91.3037 /T 88.6426 109.5/ 48.7107 n.a. n.a. 57.295667 162.52100 -0.597675 2026-Sep-04 10:20 17 25 46.99 +42 06 23.3 347.584054 11.896087 n.a. n.a. 1.008536374806 0.2378878 0.00094530437530 -0.0046354 91.3770 /T 88.5693 109.7/ 48.6041 n.a. n.a. 58.277654 162.47974 -0.403328 2026-Sep-04 10:30 17 26 02.73 +41 57 02.4 345.752864 11.583011 n.a. n.a. 1.008537327652 0.2372526 0.00094528997848 -0.0025558 91.4519 /T 88.4944 109.8/ 48.4979 n.a. n.a. 59.262672 162.38317 -0.220745 2026-Sep-04 10:40 17 26 18.81 +41 47 32.4 343.932079 11.209059 n.a. n.a. 1.008538277887 0.2365863 0.00094528375979 -0.0005610 91.5285 /T 88.4179 110.0/ 48.3923 n.a. n.a. 60.249244 162.23443 -0.051176 2026-Sep-04 10:50 17 26 35.27 +41 37 53.6 342.124042 10.775009 n.a. n.a. 1.008539225388 0.2358888 0.00094528533606 0.0013275 91.6068 /T 88.3395 110.1/ 48.2872 n.a. n.a. 61.236065 162.03659 0.1042341 2026-Sep-04 11:00 17 26 52.16 +41 28 06.2 340.330951 10.281777 n.a. n.a. 1.008540170029 0.2351601 0.00094529423849 0.0030885 91.6872 /T 88.2591 110.3/ 48.1828 n.a. n.a. 62.221986 161.79260 0.2444413 2026-Sep-04 11:10 17 27 09.52 +41 18 10.2 338.554843 9.730406 n.a. n.a. 1.008541111684 0.2343999 0.00094530991315 0.0047009 91.7697 /T 88.1767 110.4/ 48.0790 n.a. n.a. 63.206005 161.50532 0.3684903 2026-Sep-04 11:20 17 27 27.39 +41 08 06.1 336.797580 9.122055 n.a. n.a. 1.008542050227 0.2336083 0.00094533172200 0.0061438 91.8544 /T 88.0919 110.6/ 47.9758 n.a. n.a. 64.187249 161.17751 0.4755094 2026-Sep-04 11:30 17 27 45.83 +40 57 53.8 335.060842 8.457984 n.a. n.a. 1.008542985531 0.2327850 0.00094535894372 0.0073966 91.9415 /T 88.0048 110.7/ 47.8735 n.a. n.a. 65.164972 160.81180 0.5647033 2026-Sep-04 11:40 17 28 04.85 +40 47 33.8 333.346121 7.739543 n.a. n.a. 1.008543917470 0.2319300 0.00094539077510 0.0084390 92.0311 /T 87.9152 110.9/ 47.7719 n.a. n.a. 66.138532 160.41077 0.6353473 2026-Sep-04 11:50 17 28 24.52 +40 37 06.2 331.654717 6.968160 n.a. n.a. 1.008544845916 0.2310431 0.00094542633228 0.0092511 92.1233 /T 87.8230 111.0/ 47.6711 n.a. n.a. 67.107392 159.97684 0.6867826 2026-Sep-04 12:00 17 28 44.85 +40 26 31.3 329.987741 6.145326 n.a. n.a. 1.008545770741 0.2301242 0.00094546465238 0.0098135 92.2183 /T 87.7280 111.2/ 47.5712 n.a. n.a. 68.071099 159.51238 0.7184124 2026-Sep-04 12:10 17 29 05.89 +40 15 49.4 328.346116 5.272585 n.a. n.a. 1.008546691816 0.2291731 0.00094550469522 0.0101070 92.3161 /T 87.6302 111.3/ 47.4722 n.a. n.a. 69.029280 159.01966 0.7296977 2026-Sep-04 12:20 17 29 27.67 +40 05 00.7 326.730579 4.351520 n.a. n.a. 1.008547609011 0.2281897 0.00094554534521 0.0101132 92.4169 /T 87.5294 111.5/ 47.3741 n.a. n.a. 69.981633 158.50085 0.7201547 2026-Sep-04 12:30 17 29 50.22 +39 54 05.5 325.141695 3.383744 n.a. n.a. 1.008548522197 0.2271737 0.00094558541336 0.0098139 92.5207 /T 87.4256 111.7/ 47.2770 n.a. n.a. 70.927912 157.95804 0.6893523 2026-Sep-04 12:40 17 30 13.56 +39 43 04.1 323.579857 2.370885 n.a. n.a. 1.008549431242 0.2261250 0.00094562363959 0.0091918 92.6277 /T 87.3186 111.8/ 47.1809 n.a. n.a. 71.867926 157.39325 0.6369096 2026-Sep-04 12:50 17 30 37.73 +39 31 56.9 322.045303 1.314581 n.a. n.a. 1.008550336015 0.2250433 0.00094565869494 0.0082301 92.7380 /T 87.2084 112.0/ 47.0858 n.a. n.a. 72.801525 156.80839 0.5624943 2026-Sep-04 13:00 17 31 02.75 +39 20 44.0 320.538119 0.216468 n.a. n.a. 1.008551236384 0.2239285 0.00094568918413 0.0069123 92.8515 /T 87.0948 112.2/ 46.9918 n.a. n.a. 73.728593 156.20534 0.4658207 >..... Elevation Cut-off Requested .....< $$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 ***************************************************************************************************************************************************************************************************************************************************