Iris im Jahr 2024Alexander Pikhard (Generator) |
Opposition 2024Iris steht im Jahr 2024 am 6. August in Opposition zur Sonne. Suchkarte
EphemerideNachfolgende Ephemeride wird online erstellt über das API des JPL Horizons Ephemeridengenerators und verwendet daher, im Gegensatz zu obiger Grafik, stets die aktuellsten Bahnelemente. API VERSION: 1.2
API SOURCE: NASA/JPL Horizons API
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Ephemeris / API_USER Sun Apr 28 15:58:51 2024 Pasadena, USA / Horizons
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Target body name: 7 Iris (A847 PA) {source: JPL#132}
Center body name: Earth (399) {source: DE441}
Center-site name: GEOCENTRIC
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Start time : A.D. 2024-Jan-01 00:00:00.0000 UT
Stop time : A.D. 2024-Dec-31 00:00:00.0000 UT
Step-size : 5760 minutes
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Target pole/equ : undefined
Target radii : 99.915 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.240426.p240720
EOP coverage : DATA-BASED 1962-JAN-20 TO 2024-APR-26. PREDICTS-> 2024-JUL-19
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 )
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Initial IAU76/J2000 heliocentric ecliptic osculating elements (au, days, deg.):
EPOCH= 2457700.5 ! 2016-Nov-08.00 (TDB) Residual RMS= .22099
EC= .2314036715963813 QR= 1.833346820939303 TP= 2458075.9327372424
OM= 259.5702314309083 W= 145.3517813327438 IN= 5.523471576739683
Equivalent ICRF heliocentric cartesian coordinates (au, au/d):
X= 4.658072005771166E-01 Y=-2.379085483196453E+00 Z=-9.344343271067136E-01
VX= 9.350177452592848E-03 VY= 3.301777517893353E-03 VZ= 2.325271006731598E-03
Asteroid physical parameters (km, seconds, rotational period in hours):
GM= n.a. RAD= 99.915 ROTPER= 7.139
H= 5.64 G= .150 B-V= .855
ALBEDO= .2766 STYP= S
*********************************************************************************************************************************************
Date__(UT)__HR:MN R.A.__(a-apparent)__DEC APmag S-brt r rdot delta deldot S-O-T /r Cnst
*********************************************************************************************************************************************
$$SOE
2024-Jan-01 00:00 17 51 14.62 -23 08 46.9 11.071 5.160 2.756708592168 -2.8303587 3.71068156503917 -7.9619989 12.0549 /L Sgr
2024-Jan-05 00:00 17 58 22.63 -23 06 16.3 11.100 5.201 2.750113805293 -2.8787247 3.69110934030017 -8.9810857 14.4925 /L Sgr
2024-Jan-09 00:00 18 05 30.51 -23 02 29.6 11.125 5.238 2.743407604812 -2.9267883 3.66919090807680 -9.9927399 16.9304 /L Sgr
2024-Jan-13 00:00 18 12 37.83 -22 57 26.8 11.146 5.272 2.736590702101 -2.9745379 3.64494887989723 -10.9910280 19.3687 /L Sgr
2024-Jan-17 00:00 18 19 44.02 -22 51 07.9 11.163 5.304 2.729663836112 -3.0219616 3.61842764683527 -11.9640582 21.8068 /L Sgr
2024-Jan-21 00:00 18 26 48.75 -22 43 32.9 11.177 5.334 2.722627774174 -3.0690468 3.58969361763899 -12.9069691 24.2442 /L Sgr
2024-Jan-25 00:00 18 33 51.71 -22 34 42.8 11.187 5.362 2.715483312602 -3.1157810 3.55881213642470 -13.8241705 26.6813 /L Sgr
2024-Jan-29 00:00 18 40 52.54 -22 24 38.5 11.195 5.388 2.708231277470 -3.1621509 3.52583626862241 -14.7208102 29.1191 /L Sgr
2024-Feb-02 00:00 18 47 50.92 -22 13 20.4 11.199 5.413 2.700872525597 -3.2081431 3.49081029940745 -15.5991269 31.5585 /L Sgr
2024-Feb-06 00:00 18 54 46.55 -22 00 49.5 11.201 5.436 2.693407945635 -3.2537436 3.45377676851461 -16.4585084 34.0005 /L Sgr
2024-Feb-10 00:00 19 01 38.98 -21 47 07.7 11.200 5.458 2.685838459208 -3.2989378 3.41478386552953 -17.2939259 36.4455 /L Sgr
2024-Feb-14 00:00 19 08 27.65 -21 32 16.5 11.196 5.479 2.678165022199 -3.3437108 3.37390009515111 -18.0934980 38.8935 /L Sgr
2024-Feb-18 00:00 19 15 12.25 -21 16 17.7 11.190 5.498 2.670388625955 -3.3880471 3.33121693363285 -18.8521075 41.3442 /L Sgr
2024-Feb-22 00:00 19 21 52.43 -20 59 14.1 11.180 5.517 2.662510298236 -3.4319308 3.28682383823582 -19.5749104 43.7980 /L Sgr
2024-Feb-26 00:00 19 28 27.84 -20 41 07.7 11.169 5.534 2.654531104370 -3.4753451 3.24079704235069 -20.2671656 46.2560 /L Sgr
2024-Mar-01 00:00 19 34 58.19 -20 22 00.5 11.154 5.549 2.646452148657 -3.5182730 3.19320333961044 -20.9317055 48.7199 /L Sgr
2024-Mar-05 00:00 19 41 23.16 -20 01 55.0 11.137 5.564 2.638274575893 -3.5606964 3.14410611953715 -21.5685859 51.1911 /L Sgr
2024-Mar-09 00:00 19 47 42.29 -19 40 54.4 11.118 5.578 2.629999572999 -3.6025970 3.09357307949985 -22.1734152 53.6712 /L Sgr
2024-Mar-13 00:00 19 53 55.00 -19 19 02.0 11.095 5.590 2.621628370654 -3.6439556 3.04169058274335 -22.7348058 56.1610 /L Sgr
2024-Mar-17 00:00 20 00 00.95 -18 56 20.9 11.070 5.601 2.613162244442 -3.6847528 2.98856835878302 -23.2470684 58.6610 /L Sgr
2024-Mar-21 00:00 20 05 59.73 -18 32 55.3 11.042 5.612 2.604602515067 -3.7249689 2.93431434682909 -23.7157933 61.1719 /L Sgr
2024-Mar-25 00:00 20 11 50.96 -18 08 48.5 11.012 5.621 2.595950548701 -3.7645841 2.87902229015049 -24.1464699 63.6955 /L Cap
2024-Mar-29 00:00 20 17 34.30 -17 44 03.4 10.979 5.628 2.587207758465 -3.8035775 2.82277598002128 -24.5422963 66.2340 /L Cap
2024-Apr-02 00:00 20 23 09.36 -17 18 44.0 10.943 5.635 2.578375606848 -3.8419271 2.76565474887535 -24.9036927 68.7901 /L Cap
2024-Apr-06 00:00 20 28 35.53 -16 52 54.9 10.904 5.641 2.569455608223 -3.8796101 2.70774209286256 -25.2261416 71.3668 /L Cap
2024-Apr-10 00:00 20 33 52.16 -16 26 40.5 10.862 5.645 2.560449331079 -3.9166029 2.64913995428115 -25.4985658 73.9663 /L Cap
2024-Apr-14 00:00 20 38 58.73 -16 00 05.8 10.818 5.648 2.551358399846 -3.9528808 2.58997384191295 -25.7146000 76.5903 /L Cap
2024-Apr-18 00:00 20 43 54.66 -15 33 16.0 10.770 5.649 2.542184496262 -3.9884190 2.53036913186706 -25.8794341 79.2405 /L Cap
2024-Apr-22 00:00 20 48 39.41 -15 06 15.6 10.719 5.649 2.532929360886 -4.0231913 2.47043736096462 -25.9984173 81.9198 /L Cap
2024-Apr-26 00:00 20 53 12.45 -14 39 09.1 10.666 5.648 2.523594794899 -4.0571712 2.41028063425273 -26.0745383 84.6314 /L Cap
2024-Apr-30 00:00 20 57 33.12 -14 12 01.8 10.609 5.645 2.514182661996 -4.0903312 2.34999701517841 -26.1078970 87.3798 /L Aqr
2024-May-04 00:00 21 01 40.54 -13 44 59.9 10.548 5.641 2.504694890409 -4.1226430 2.28969062212701 -26.0926893 90.1695 /L Aqr
2024-May-08 00:00 21 05 33.77 -13 18 09.7 10.485 5.635 2.495133475051 -4.1540774 2.22948661683184 -26.0171923 93.0052 /L Aqr
2024-May-12 00:00 21 09 11.94 -12 51 38.1 10.418 5.627 2.485500479575 -4.1846045 2.16953481762034 -25.8742732 95.8903 /L Aqr
2024-May-16 00:00 21 12 34.15 -12 25 32.3 10.348 5.617 2.475798038122 -4.2141933 2.10998780190626 -25.6677229 98.8281 /L Aqr
2024-May-20 00:00 21 15 39.52 -11 59 58.4 10.274 5.606 2.466028357222 -4.2428119 2.05098696105771 -25.4018959 101.8227 /L Aqr
2024-May-24 00:00 21 18 27.17 -11 35 03.0 10.196 5.592 2.456193718018 -4.2704275 1.99266668491995 -25.0786897 104.8791 /L Aqr
2024-May-28 00:00 21 20 56.05 -11 10 53.3 10.115 5.576 2.446296478593 -4.2970065 1.93515990973325 -24.6969097 108.0032 /L Aqr
2024-Jun-01 00:00 21 23 04.89 -10 47 38.1 10.031 5.557 2.436339076501 -4.3225138 1.87861004181082 -24.2481897 111.2016 /L Aqr
2024-Jun-05 00:00 21 24 52.41 -10 25 26.2 9.943 5.535 2.426324031478 -4.3469135 1.82318711692783 -23.7191212 114.4807 /L Aqr
2024-Jun-09 00:00 21 26 17.43 -10 04 26.9 9.851 5.511 2.416253947943 -4.3701688 1.76908766937182 -23.1021284 117.8453 /L Aqr
2024-Jun-13 00:00 21 27 18.84 -09 44 49.6 9.755 5.484 2.406131516861 -4.3922417 1.71651317246866 -22.3996468 121.2991 /L Aqr
2024-Jun-17 00:00 21 27 55.70 -09 26 42.2 9.657 5.453 2.395959517086 -4.4130939 1.66565666249436 -21.6151277 124.8457 /L Aqr
2024-Jun-21 00:00 21 28 07.20 -09 10 12.5 9.554 5.418 2.385740816589 -4.4326866 1.61670578920931 -20.7499466 128.4886 /L Cap
2024-Jun-25 00:00 21 27 52.50 -08 55 29.4 9.448 5.379 2.375478374365 -4.4509798 1.56984755689169 -19.8026329 132.2312 /L Aqr
2024-Jun-29 00:00 21 27 10.78 -08 42 41.7 9.340 5.336 2.365175243407 -4.4679322 1.52528074429550 -18.7639811 136.0765 /L Aqr
2024-Jul-03 00:00 21 26 01.56 -08 31 58.0 9.227 5.288 2.354834574005 -4.4835011 1.48323078932479 -17.6222395 140.0244 /L Aqr
2024-Jul-07 00:00 21 24 24.86 -08 23 26.2 9.112 5.235 2.344459616406 -4.4976430 1.44394079205094 -16.3752559 144.0703 /L Aqr
2024-Jul-11 00:00 21 22 21.25 -08 17 11.6 8.995 5.176 2.334053722879 -4.5103131 1.40764565381578 -15.0312396 148.2029 /L Aqr
2024-Jul-15 00:00 21 19 51.97 -08 13 16.3 8.875 5.111 2.323620349760 -4.5214658 1.37455713431214 -13.6008720 152.4029 /L Aqr
2024-Jul-19 00:00 21 16 58.88 -08 11 40.4 8.753 5.040 2.313163059614 -4.5310543 1.34486268260850 -12.0946213 156.6382 /L Aqr
2024-Jul-23 00:00 21 13 44.27 -08 12 22.2 8.629 4.961 2.302685523385 -4.5390312 1.31872629160725 -10.5215748 160.8518 /L Aqr
2024-Jul-27 00:00 21 10 10.90 -08 15 18.3 8.505 4.877 2.292191522640 -4.5453481 1.29629826480075 -8.8841364 164.9298 /L Aqr
2024-Jul-31 00:00 21 06 22.36 -08 20 22.4 8.386 4.790 2.281684951749 -4.5499555 1.27772448660055 -7.1866438 168.6095 /L Aqr
2024-Aug-04 00:00 21 02 23.01 -08 27 25.1 8.289 4.719 2.271169819551 -4.5528035 1.26312543325842 -5.4471091 171.2409 /L Aqr
2024-Aug-08 00:00 20 58 17.82 -08 36 12.5 8.251 4.699 2.260650250813 -4.5538409 1.25256842935506 -3.6919443 171.6605 /T Aqr
2024-Aug-12 00:00 20 54 12.22 -08 46 27.0 8.282 4.741 2.250130487889 -4.5530161 1.24605851043814 -1.9476452 169.5648 /T Aqr
2024-Aug-16 00:00 20 50 11.70 -08 57 49.9 8.348 4.810 2.239614892466 -4.5502767 1.24354290797984 -0.2376008 166.0518 /T Aqr
2024-Aug-20 00:00 20 46 21.40 -09 10 02.4 8.423 4.881 2.229107947268 -4.5455696 1.24492025403902 1.4204005 161.9586 /T Aqr
2024-Aug-24 00:00 20 42 46.05 -09 22 45.8 8.501 4.947 2.218614257808 -4.5388412 1.25006040676891 3.0193461 157.6398 /T Aqr
2024-Aug-28 00:00 20 39 30.13 -09 35 42.2 8.580 5.007 2.208138553975 -4.5300371 1.25882012507415 4.5515647 153.2483 /T Cap
2024-Sep-01 00:00 20 36 37.74 -09 48 33.9 8.659 5.062 2.197685691054 -4.5191028 1.27102596755509 5.9994072 148.8621 /T Cap
2024-Sep-05 00:00 20 34 12.39 -10 01 02.8 8.738 5.110 2.187260650684 -4.5059828 1.28646183634443 7.3452594 144.5275 /T Cap
2024-Sep-09 00:00 20 32 16.90 -10 12 51.7 8.816 5.152 2.176868541735 -4.4906219 1.30487720906663 8.5773460 140.2740 /T Cap
2024-Sep-13 00:00 20 30 53.22 -10 23 46.0 8.892 5.188 2.166514600373 -4.4729651 1.32600215193498 9.6905976 136.1203 /T Cap
2024-Sep-17 00:00 20 30 02.39 -10 33 33.7 8.967 5.220 2.156204189207 -4.4529578 1.34956322642732 10.6875463 132.0773 /T Cap
2024-Sep-21 00:00 20 29 44.71 -10 42 05.0 9.040 5.247 2.145942796414 -4.4305460 1.37530469094491 11.5806013 128.1501 /T Cap
2024-Sep-25 00:00 20 30 00.25 -10 49 12.0 9.110 5.270 2.135736035244 -4.4056759 1.40299929261469 12.3785270 124.3404 /T Cap
2024-Sep-29 00:00 20 30 48.71 -10 54 47.2 9.179 5.289 2.125589643197 -4.3782938 1.43242527810124 13.0787812 120.6490 /T Cap
2024-Oct-03 00:00 20 32 09.52 -10 58 43.1 9.245 5.305 2.115509480885 -4.3483467 1.46335400144406 13.6794064 117.0759 /T Cap
2024-Oct-07 00:00 20 34 01.81 -11 00 52.7 9.308 5.317 2.105501530502 -4.3157824 1.49555671467156 14.1822508 113.6195 /T Cap
2024-Oct-11 00:00 20 36 24.38 -11 01 11.0 9.368 5.326 2.095571893676 -4.2805499 1.52881325092597 14.5929357 110.2769 /T Cap
2024-Oct-15 00:00 20 39 15.66 -10 59 34.5 9.425 5.332 2.085726788760 -4.2425995 1.56292154309199 14.9218734 107.0435 /T Cap
2024-Oct-19 00:00 20 42 34.00 -10 56 00.5 9.479 5.335 2.075972547610 -4.2018831 1.59771109575088 15.1855801 103.9130 /T Aqr
2024-Oct-23 00:00 20 46 17.91 -10 50 27.3 9.529 5.336 2.066315611673 -4.1583545 1.63304636854622 15.3946688 100.8788 /T Aqr
2024-Oct-27 00:00 20 50 25.95 -10 42 53.1 9.577 5.335 2.056762527058 -4.1119693 1.66880017826153 15.5473516 97.9356 /T Aqr
2024-Oct-31 00:00 20 54 56.77 -10 33 14.9 9.622 5.332 2.047319939221 -4.0626859 1.70483991300555 15.6422332 95.0791 /T Aqr
2024-Nov-04 00:00 20 59 49.02 -10 21 30.6 9.664 5.328 2.037994587283 -4.0104651 1.74103327930663 15.6807704 92.3054 /T Aqr
2024-Nov-08 00:00 21 05 01.28 -10 07 39.2 9.703 5.321 2.028793297691 -3.9552706 1.77725431599920 15.6672089 89.6104 /T Aqr
2024-Nov-12 00:00 21 10 32.00 -09 51 40.9 9.739 5.313 2.019722977232 -3.8970693 1.81339172989112 15.6103021 86.9899 /T Aqr
2024-Nov-16 00:00 21 16 19.75 -09 33 36.4 9.772 5.304 2.010790605379 -3.8358318 1.84936050915635 15.5235556 84.4387 /T Aqr
2024-Nov-20 00:00 21 22 23.32 -09 13 27.0 9.802 5.293 2.002003225810 -3.7715324 1.88510367434578 15.4151175 81.9515 /T Aqr
2024-Nov-24 00:00 21 28 41.56 -08 51 14.0 9.830 5.281 1.993367936925 -3.7041496 1.92056811298652 15.2813668 79.5240 /T Cap
2024-Nov-28 00:00 21 35 13.54 -08 26 57.5 9.856 5.268 1.984891881911 -3.6336660 1.95569054737225 15.1187689 77.1531 /T Cap
2024-Dec-02 00:00 21 41 58.36 -08 00 38.3 9.879 5.254 1.976582238491 -3.5600691 1.99040310278505 14.9265620 74.8364 /T Aqr
2024-Dec-06 00:00 21 48 55.06 -07 32 18.7 9.900 5.239 1.968446207950 -3.4833512 2.02463866977807 14.7065172 72.5719 /T Aqr
2024-Dec-10 00:00 21 56 02.61 -07 02 01.9 9.918 5.223 1.960491003008 -3.4035103 2.05833986875640 14.4656357 70.3571 /T Aqr
2024-Dec-14 00:00 22 03 20.12 -06 29 51.2 9.935 5.206 1.952723834101 -3.3205509 2.09147129420119 14.2151554 68.1892 /T Aqr
2024-Dec-18 00:00 22 10 46.85 -05 55 51.0 9.949 5.189 1.945151894505 -3.2344835 2.12402033486221 13.9615575 66.0648 /T Aqr
2024-Dec-22 00:00 22 18 22.13 -05 20 05.1 9.962 5.170 1.937782345138 -3.1453256 2.15597649562692 13.7008641 63.9810 /T Aqr
2024-Dec-26 00:00 22 26 05.49 -04 42 36.6 9.972 5.152 1.930622299483 -3.0531009 2.18731713200188 13.4281822 61.9360 /T Aqr
2024-Dec-30 00:00 22 33 56.49 -04 03 29.1 9.981 5.133 1.923678808281 -2.9578399 2.21801152458211 13.1411439 59.9282 /T Aqr
$$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.A.__(a-apparent)__DEC' =
Airless apparent right ascension and declination of the target center
with respect to an instantaneous reference frame defined by the Earth equator
of-date (z-axis) and meridian containing the Earth equinox of-date (x-axis,
EOP-corrected IAU76/80). Compensated for down-leg light-time delay,
gravitational deflection of light, stellar aberration, precession & nutation.
Note: equinox (RA origin) is offset -53 mas from the of-date frame defined
by the IAU06/00a P & N system.
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}
'APmag S-brt' =
The asteroids' approximate apparent airless visual magnitude and surface
brightness using the standard IAU H-G system magnitude model:
APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi_1 + G*phi_2)
For solar phase angles >90 deg, the error could exceed 1 magnitude. For
phase angles >120 degrees, output values are rounded to the nearest integer to
indicate error could be large and unknown. 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
'Cnst' =
Constellation ID; the 3-letter abbreviation for the name of the
constellation containing the target centers' astrometric position,
as defined by IAU (1930) boundary delineation. See documentation
for list of abbreviations.
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
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