******************************************************************************* JPL/HORIZONS 1P/Halley 2023-Sep-17 14:49:59 Rec #:90000030 Soln.date: 2022-Jun-07_13:24:35 # obs: 8548 (1835-1994) IAU76/J2000 helio. ecliptic osc. elements (au, days, deg., period=Julian yrs): EPOCH= 2439857.5 ! 1968-Jan-02.0000000 (TDB) RMSW= n.a. EC= .9679427911271 QR= .5747157977675837 TP= 2446470.1488983454 OM= 59.11448293673941 W= 112.257792004868 IN= 162.1878711908339 A= 17.92781773504393 MA= 274.1404919498392 ADIST= 35.28091967232027 PER= 75.91006173829101 N= .012984132 ANGMOM= .018294235 DAN= 1.7857 DDN= .82759 L= 305.8527835 B= 16.4455591 MOID= .0752736 TP= 1986-Feb-08.6488983454 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 5.5 M1= 5.5 M2= 13.6 k1= 8. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 4.823267459869E-10 A2= 1.554713398218E-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#73, data arc: 1835-08-21 to 1994-01-11 2: k1=8.0, k2=5.0, phase coef.=0.03; ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Sun Sep 17 14:49:59 2023 Pasadena, USA / Horizons ******************************************************************************* Target body name: 1P/Halley {source: JPL#73} Center body name: Earth (399) {source: DE441} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Nov-01 00:00:00.0000 UT Stop time : A.D. 2024-Jan-31 00:00:00.0000 UT Step-size : 1440 minutes ******************************************************************************* Target pole/equ : undefined Target radii : 5.5 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.230915.p231208 EOP coverage : DATA-BASED 1962-JAN-20 TO 2023-SEP-15. PREDICTS-> 2023-DEC-07 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= 2439857.5 ! 1968-Jan-02.0000000 (TDB) RMSW= n.a. EC= .9679427911271 QR= .5747157977675837 TP= 2446470.1488983454 OM= 59.11448293673941 W= 112.257792004868 IN= 162.1878711908339 Equivalent ICRF heliocentric cartesian coordinates (au, au/d): X=-1.333580711037850E+01 Y= 2.543805202833605E+01 Z= 2.636800024594010E+00 VX= 1.415824036915183E-03 VY=-1.416718165237950E-03 VZ= 4.194435401575923E-05 Comet physical (GM= km^3/s^2; RAD= km): GM= n.a. RAD= 5.5 M1= 5.5 M2= 13.6 k1= 8. k2= 5. PHCOF= .030 Comet non-gravitational force model (AMRAT=m^2/kg;A1-A3=au/d^2;DT=days;R0=au): AMRAT= 0. DT= 0. A1= 4.823267459869E-10 A2= 1.554713398218E-10 A3= 0. Standard model: ALN= .1112620426 NK= 4.6142 NM= 2.15 NN= 5.093 R0= 2.808 ******************************************************************************************************************************************************************************************************************************** Date__(UT)__HR:MN R.A._____(ICRF)_____DEC R.A.__(a-apparent)__DEC dRA*cosD d(DEC)/dt T-mag N-mag Illu% r rdot delta deldot S-O-T /r S-T-O PsAng PsAMV Cnst ******************************************************************************************************************************************************************************************************************************** $$SOE 2023-Nov-01 00:00 08 24 07.82 +02 22 20.4 08 25 21.76 +02 17 52.7 -0.48899 -1.09949 25.595 29.106 99.98005 35.14329248913 0.0153973 35.1263497215639 -28.7686573 90.1631 /L 1.6186 284.170 110.666 Hya 2023-Nov-02 00:00 08 24 06.98 +02 21 54.2 08 25 20.96 +02 17 26.3 -0.56042 -1.08240 25.594 29.105 99.98007 35.14330126614 0.0149938 35.1097354077301 -28.7638732 91.1235 /L 1.6180 284.453 110.666 Hya 2023-Nov-03 00:00 08 24 06.03 +02 21 28.4 08 25 20.04 +02 17 00.4 -0.63195 -1.06492 25.593 29.104 99.98010 35.14330981004 0.0145902 35.0931262956591 -28.7506197 92.0849 /L 1.6169 284.737 110.666 Hya 2023-Nov-04 00:00 08 24 04.97 +02 21 03.0 08 25 19.01 +02 16 34.9 -0.70356 -1.04706 25.592 29.103 99.98014 35.14331812080 0.0141865 35.0765273178027 -28.7287571 93.0472 /L 1.6153 285.022 110.666 Hya 2023-Nov-05 00:00 08 24 03.78 +02 20 38.0 08 25 17.86 +02 16 09.9 -0.77522 -1.02881 25.591 29.102 99.98019 35.14332619835 0.0137827 35.0599434831874 -28.6981602 94.0104 /L 1.6134 285.308 110.666 Hya 2023-Nov-06 00:00 08 24 02.49 +02 20 13.5 08 25 16.60 +02 15 45.3 -0.84691 -1.01017 25.590 29.101 99.98025 35.14333404266 0.0133789 35.0433798690602 -28.6587177 94.9744 /L 1.6109 285.595 110.666 Hya 2023-Nov-07 00:00 08 24 01.08 +02 19 49.5 08 25 15.21 +02 15 21.2 -0.91860 -0.99113 25.589 29.099 99.98033 35.14334165368 0.0129749 35.0268416135712 -28.6103294 95.9393 /L 1.6080 285.883 110.666 Hya 2023-Nov-08 00:00 08 23 59.55 +02 19 25.9 08 25 13.71 +02 14 57.5 -0.99027 -0.97172 25.588 29.098 99.98041 35.14334903137 0.0125709 35.0103339103330 -28.5529029 96.9050 /L 1.6047 286.172 110.665 Hya 2023-Nov-09 00:00 08 23 57.91 +02 19 02.7 08 25 12.09 +02 14 34.3 -1.06187 -0.95191 25.587 29.097 99.98050 35.14335617569 0.0121668 34.9938620048099 -28.4863507 97.8715 /L 1.6009 286.463 110.665 Hya 2023-Nov-10 00:00 08 23 56.16 +02 18 40.1 08 25 10.36 +02 14 11.6 -1.13338 -0.93172 25.586 29.096 99.98061 35.14336308658 0.0117627 34.9774311918152 -28.4105894 98.8387 /L 1.5966 286.756 110.665 Hya 2023-Nov-11 00:00 08 23 54.29 +02 18 17.9 08 25 08.51 +02 13 49.3 -1.20477 -0.91115 25.585 29.095 99.98073 35.14336976401 0.0113585 34.9610468128828 -28.3255412 99.8066 /L 1.5919 287.051 110.665 Hya 2023-Nov-12 00:00 08 23 52.30 +02 17 56.2 08 25 06.56 +02 13 27.6 -1.27600 -0.89021 25.584 29.094 99.98085 35.14337620794 0.0109542 34.9447142519197 -28.2311381 100.7751 /L 1.5867 287.348 110.665 Hya 2023-Nov-13 00:00 08 23 50.21 +02 17 35.1 08 25 04.49 +02 13 06.3 -1.34702 -0.86890 25.583 29.093 99.98099 35.14338241832 0.0105498 34.9284389274359 -28.1273296 101.7443 /L 1.5811 287.647 110.664 Hya 2023-Nov-14 00:00 08 23 47.99 +02 17 14.4 08 25 02.31 +02 12 45.5 -1.41780 -0.84723 25.582 29.091 99.98114 35.14338839512 0.0101454 34.9122262799589 -28.0140917 102.7140 /L 1.5751 287.949 110.664 Hya 2023-Nov-15 00:00 08 23 45.67 +02 16 54.3 08 25 00.02 +02 12 25.2 -1.48828 -0.82521 25.581 29.090 99.98130 35.14339413831 0.0097409 34.8960817540501 -27.8914358 103.6842 /L 1.5686 288.254 110.664 Hya 2023-Nov-16 00:00 08 23 43.23 +02 16 34.7 08 24 57.62 +02 12 05.4 -1.55843 -0.80286 25.580 29.089 99.98147 35.14339964783 0.0093363 34.8800107755984 -27.7594159 104.6548 /L 1.5616 288.561 110.663 Hya 2023-Nov-17 00:00 08 23 40.68 +02 16 15.6 08 24 55.11 +02 11 46.2 -1.62820 -0.78019 25.579 29.088 99.98164 35.14340492366 0.0089317 34.8640187263787 -27.6181308 105.6259 /L 1.5542 288.872 110.663 Hya 2023-Nov-18 00:00 08 23 38.02 +02 15 57.1 08 24 52.48 +02 11 27.6 -1.69755 -0.75722 25.578 29.086 99.98183 35.14340996577 0.0085270 34.8481109187388 -27.4677212 106.5972 /L 1.5463 289.186 110.662 Hya 2023-Nov-19 00:00 08 23 35.25 +02 15 39.1 08 24 49.75 +02 11 09.6 -1.76644 -0.73397 25.577 29.085 99.98203 35.14341477411 0.0081223 34.8322925733630 -27.3083622 107.5688 /L 1.5380 289.504 110.662 Hya 2023-Nov-20 00:00 08 23 32.37 +02 15 21.7 08 24 46.90 +02 10 52.1 -1.83484 -0.71045 25.576 29.084 99.98223 35.14341934865 0.0077175 34.8165688024257 -27.1402525 108.5407 /L 1.5293 289.825 110.661 Hya 2023-Nov-21 00:00 08 23 29.38 +02 15 04.8 08 24 43.94 +02 10 35.2 -1.90275 -0.68669 25.575 29.083 99.98245 35.14342368937 0.0073127 34.8009445995351 -26.9636018 109.5127 /L 1.5202 290.150 110.661 Hya 2023-Nov-22 00:00 08 23 26.28 +02 14 48.5 08 24 40.86 +02 10 18.9 -1.97013 -0.66269 25.574 29.081 99.98267 35.14342779623 0.0069078 34.7854248371446 -26.7786177 110.4848 /L 1.5106 290.480 110.660 Hya 2023-Nov-23 00:00 08 23 23.07 +02 14 32.8 08 24 37.68 +02 10 03.2 -2.03699 -0.63847 25.573 29.080 99.98290 35.14343166920 0.0065028 34.7700142717671 -26.5854919 111.4570 /L 1.5006 290.814 110.660 Hya 2023-Nov-24 00:00 08 23 19.76 +02 14 17.7 08 24 34.39 +02 09 48.0 -2.10332 -0.61404 25.572 29.079 99.98314 35.14343530826 0.0060978 34.7547175570738 -26.3843866 112.4292 /L 1.4901 291.154 110.659 Hya 2023-Nov-25 00:00 08 23 16.34 +02 14 03.2 08 24 30.99 +02 09 33.3 -2.16912 -0.58940 25.571 29.078 99.98339 35.14343871336 0.0056928 34.7395392643734 -26.1754230 113.4014 /L 1.4793 291.498 110.659 Hya 2023-Nov-26 00:00 08 23 12.82 +02 13 49.2 08 24 27.50 +02 09 19.3 -2.23439 -0.56455 25.570 29.076 99.98364 35.14344188450 0.0052877 34.7244839087639 -25.9586740 114.3735 /L 1.4680 291.848 110.658 Hya 2023-Nov-27 00:00 08 23 09.19 +02 13 35.9 08 24 23.90 +02 09 05.8 -2.29914 -0.53949 25.569 29.075 99.98390 35.14344482163 0.0048825 34.7095559777342 -25.7341628 115.3455 /L 1.4563 292.204 110.657 Hya 2023-Nov-28 00:00 08 23 05.46 +02 13 23.1 08 24 20.21 +02 08 52.9 -2.36337 -0.51422 25.568 29.074 99.98417 35.14344752474 0.0044773 34.6947599579333 -25.5018707 116.3173 /L 1.4443 292.566 110.657 Hya 2023-Nov-29 00:00 08 23 01.62 +02 13 11.0 08 24 16.41 +02 08 40.7 -2.42705 -0.48874 25.567 29.073 99.98444 35.14344999380 0.0040721 34.6801003560145 -25.2617499 117.2889 /L 1.4318 292.934 110.656 Hya 2023-Nov-30 00:00 08 22 57.69 +02 12 59.4 08 24 12.51 +02 08 29.0 -2.49019 -0.46304 25.566 29.071 99.98473 35.14345222878 0.0036668 34.6655817110265 -25.0137385 118.2603 /L 1.4189 293.310 110.655 Hya 2023-Dec-01 00:00 08 22 53.65 +02 12 48.5 08 24 08.51 +02 08 18.1 -2.55276 -0.43712 25.565 29.070 99.98501 35.14345422965 0.0032615 34.6512085980983 -24.7577753 119.2313 /L 1.4056 293.693 110.655 Hya 2023-Dec-02 00:00 08 22 49.52 +02 12 38.2 08 24 04.41 +02 08 07.7 -2.61473 -0.41100 25.564 29.069 99.98530 35.14345599640 0.0028561 34.6369856251424 -24.4938094 120.2019 /L 1.3920 294.084 110.654 Hya 2023-Dec-03 00:00 08 22 45.28 +02 12 28.5 08 24 00.20 +02 07 58.0 -2.67608 -0.38466 25.564 29.067 99.98560 35.14345752900 0.0024507 34.6229174253082 -24.2218048 121.1721 /L 1.3779 294.483 110.653 Hya 2023-Dec-04 00:00 08 22 40.95 +02 12 19.5 08 23 55.90 +02 07 49.0 -2.73678 -0.35811 25.563 29.066 99.98590 35.14345882741 0.0020452 34.6090086479068 -23.9417412 122.1417 /L 1.3635 294.890 110.652 Hya 2023-Dec-05 00:00 08 22 36.52 +02 12 11.1 08 23 51.49 +02 07 40.6 -2.79679 -0.33137 25.562 29.065 99.98621 35.14345989163 0.0016397 34.5952639498592 -23.6536120 123.1106 /L 1.3487 295.308 110.651 Hya 2023-Dec-06 00:00 08 22 31.99 +02 12 03.3 08 23 46.99 +02 07 32.8 -2.85610 -0.30443 25.561 29.063 99.98652 35.14346072160 0.0012342 34.5816879888215 -23.3574208 124.0788 /L 1.3336 295.734 110.651 Hya 2023-Dec-07 00:00 08 22 27.37 +02 11 56.2 08 23 42.40 +02 07 25.7 -2.91466 -0.27730 25.560 29.062 99.98683 35.14346131732 0.0008286 34.5682854182854 -23.0531779 125.0462 /L 1.3181 296.172 110.650 Hya 2023-Dec-08 00:00 08 22 22.66 +02 11 49.8 08 23 37.70 +02 07 19.2 -2.97244 -0.24999 25.559 29.061 99.98715 35.14346167874 0.0004229 34.5550608842031 -22.7408989 126.0126 /L 1.3022 296.620 110.649 Hya 2023-Dec-09 00:00 08 22 17.86 +02 11 44.0 08 23 32.92 +02 07 13.3 -3.02941 -0.22251 25.558 29.059 99.98747 35.14346180583 0.0000172 34.5420190220347 -22.4206050 126.9779 /L 1.2860 297.080 110.648 Hya 2023-Dec-10 00:00 08 22 12.96 +02 11 38.8 08 23 28.05 +02 07 08.1 -3.08554 -0.19487 25.558 29.058 99.98779 35.14346169856 -0.0003886 34.5291644525177 -22.0923270 127.9421 /L 1.2695 297.552 110.647 Hya 2023-Dec-11 00:00 08 22 07.98 +02 11 34.3 08 23 23.10 +02 07 03.5 -3.14077 -0.16708 25.557 29.057 99.98812 35.14346135688 -0.0007945 34.5165017740107 -21.7561132 128.9048 /L 1.2526 298.037 110.646 Hya 2023-Dec-12 00:00 08 22 02.90 +02 11 30.5 08 23 18.06 +02 06 59.6 -3.19507 -0.13915 25.556 29.056 99.98844 35.14346078076 -0.0012004 34.5040355492140 -21.4120408 129.8661 /L 1.2354 298.537 110.645 Hya 2023-Dec-13 00:00 08 21 57.74 +02 11 27.4 08 23 12.94 +02 06 56.4 -3.24839 -0.11110 25.555 29.054 99.98877 35.14345997015 -0.0016064 34.4917702847899 -21.0602287 130.8257 /L 1.2179 299.050 110.644 Hya 2023-Dec-14 00:00 08 21 52.50 +02 11 24.9 08 23 07.73 +02 06 53.8 -3.30068 -0.08295 25.555 29.053 99.98910 35.14345892501 -0.0020126 34.4797104041481 -20.7008476 131.7834 /L 1.2002 299.580 110.643 Hya 2023-Dec-15 00:00 08 21 47.18 +02 11 23.1 08 23 02.44 +02 06 52.0 -3.35191 -0.05472 25.554 29.052 99.98942 35.14345764528 -0.0024188 34.4678602161747 -20.3341232 132.7391 /L 1.1821 300.126 110.642 Hya 2023-Dec-16 00:00 08 21 41.77 +02 11 21.9 08 22 57.07 +02 06 50.8 -3.40205 -0.02644 25.553 29.050 99.98975 35.14345613091 -0.0028250 34.4562238849788 -19.9603290 133.6925 /L 1.1637 300.689 110.641 Hya 2023-Dec-17 00:00 08 21 36.28 +02 11 21.5 08 22 51.61 +02 06 50.4 -3.45105 0.001879 25.552 29.049 99.99008 35.14345438185 -0.0032314 34.4448054064997 -19.5797705 134.6434 /L 1.1451 301.272 110.640 Hya 2023-Dec-18 00:00 08 21 30.72 +02 11 21.7 08 22 46.07 +02 06 50.6 -3.49892 0.030205 25.552 29.048 99.99041 35.14345239804 -0.0036379 34.4336085963450 -19.1927631 135.5917 /L 1.1262 301.874 110.639 Hya 2023-Dec-19 00:00 08 21 25.08 +02 11 22.6 08 22 40.45 +02 06 51.6 -3.54564 0.058525 25.551 29.047 99.99073 35.14345017942 -0.0040445 34.4226370901894 -18.7996112 136.5370 /L 1.1071 302.497 110.638 Hya 2023-Dec-20 00:00 08 21 19.36 +02 11 24.2 08 22 34.76 +02 06 53.2 -3.59120 0.086824 25.550 29.045 99.99105 35.14344772596 -0.0044511 34.4118943550303 -18.4005923 137.4791 /L 1.0877 303.143 110.637 Hya 2023-Dec-21 00:00 08 21 13.58 +02 11 26.5 08 22 28.99 +02 06 55.4 -3.63562 0.115092 25.550 29.044 99.99137 35.14344503759 -0.0048579 34.4013837079126 -17.9959472 138.4177 /L 1.0682 303.812 110.635 Hya 2023-Dec-22 00:00 08 21 07.72 +02 11 29.4 08 22 23.16 +02 06 58.4 -3.67890 0.143322 25.549 29.043 99.99169 35.14344211428 -0.0052647 34.3911083386231 -17.5858754 139.3525 /L 1.0484 304.508 110.634 Hya 2023-Dec-23 00:00 08 21 01.79 +02 11 33.0 08 22 17.26 +02 07 01.9 -3.72105 0.171508 25.548 29.042 99.99201 35.14343895598 -0.0056716 34.3810713336581 -17.1705352 140.2833 /L 1.0284 305.231 110.633 Hya 2023-Dec-24 00:00 08 20 55.80 +02 11 37.3 08 22 11.29 +02 07 06.2 -3.76207 0.199649 25.548 29.040 99.99232 35.14343556267 -0.0060785 34.3712756996166 -16.7500456 141.2096 /L 1.0083 305.983 110.632 Hya 2023-Dec-25 00:00 08 20 49.74 +02 11 42.2 08 22 05.26 +02 07 11.1 -3.80196 0.227742 25.547 29.039 99.99263 35.14343193432 -0.0064855 34.3617243846171 -16.3244911 142.1312 /L 0.9880 306.766 110.631 Hya 2023-Dec-26 00:00 08 20 43.62 +02 11 47.9 08 21 59.18 +02 07 16.6 -3.84072 0.255788 25.547 29.038 99.99293 35.14342807092 -0.0068924 34.3524202964162 -15.8939282 143.0475 /L 0.9676 307.583 110.630 Hya 2023-Dec-27 00:00 08 20 37.44 +02 11 54.2 08 21 53.03 +02 07 22.9 -3.87836 0.283784 25.546 29.037 99.99323 35.14342397247 -0.0072994 34.3433663159684 -15.4583948 143.9583 /L 0.9471 308.437 110.628 Hya 2023-Dec-28 00:00 08 20 31.20 +02 12 01.1 08 21 46.82 +02 07 29.9 -3.91486 0.311730 25.545 29.036 99.99352 35.14341963896 -0.0077064 34.3345653055144 -15.0179196 144.8629 /L 0.9265 309.328 110.627 Hya 2023-Dec-29 00:00 08 20 24.90 +02 12 08.8 08 21 40.55 +02 07 37.5 -3.95020 0.339623 25.545 29.034 99.99381 35.14341507040 -0.0081133 34.3260201110080 -14.5725317 145.7610 /L 0.9058 310.261 110.626 Hya 2023-Dec-30 00:00 08 20 18.55 +02 12 17.1 08 21 34.22 +02 07 45.9 -3.98438 0.367457 25.544 29.033 99.99409 35.14341026681 -0.0085203 34.3177335595808 -14.1222682 146.6518 /L 0.8851 311.239 110.625 Hya 2023-Dec-31 00:00 08 20 12.14 +02 12 26.0 08 21 27.83 +02 07 54.9 -4.01736 0.395229 25.544 29.032 99.99436 35.14340522821 -0.0089272 34.3097084534690 -13.6671787 147.5348 /L 0.8643 312.264 110.623 Hya 2024-Jan-01 00:00 08 20 05.68 +02 12 35.7 08 21 21.39 +02 08 04.6 -4.04914 0.422930 25.543 29.031 99.99463 35.14339995462 -0.0093340 34.3019475621504 -13.2073271 148.4093 /L 0.8436 313.341 110.622 Hya 2024-Jan-02 00:00 08 19 59.17 +02 12 46.0 08 21 14.90 +02 08 15.0 -4.07968 0.450553 25.543 29.030 99.99490 35.14339444608 -0.0097408 34.2944536143204 -12.7427904 149.2744 /L 0.8228 314.472 110.621 Hya 2024-Jan-03 00:00 08 19 52.62 +02 12 56.9 08 21 08.36 +02 08 26.0 -4.10898 0.478090 25.542 29.029 99.99515 35.14338870261 -0.0101475 34.2872292908843 -12.2736566 150.1294 /L 0.8022 315.664 110.619 Hya 2024-Jan-04 00:00 08 19 46.01 +02 13 08.5 08 21 01.77 +02 08 37.6 -4.13699 0.505530 25.542 29.028 99.99540 35.14338272425 -0.0105542 34.2802772195309 -11.8000216 150.9733 /L 0.7816 316.919 110.618 Hya 2024-Jan-05 00:00 08 19 39.36 +02 13 20.8 08 20 55.14 +02 08 49.9 -4.16371 0.532866 25.542 29.027 99.99563 35.14337651103 -0.0109608 34.2735999707912 -11.3219871 151.8049 /L 0.7611 318.242 110.617 Hya 2024-Jan-06 00:00 08 19 32.68 +02 13 33.7 08 20 48.47 +02 09 02.9 -4.18911 0.560086 25.541 29.026 99.99587 35.14337006299 -0.0113674 34.2672000548167 -10.8396608 152.6233 /L 0.7408 319.640 110.615 Hya 2024-Jan-07 00:00 08 19 25.95 +02 13 47.3 08 20 41.76 +02 09 16.4 -4.21315 0.587179 25.541 29.025 99.99609 35.14336338017 -0.0117738 34.2610799174220 -10.3531586 153.4270 /L 0.7208 321.116 110.614 Hya 2024-Jan-08 00:00 08 19 19.18 +02 14 01.5 08 20 35.02 +02 09 30.6 -4.23582 0.614132 25.540 29.024 99.99630 35.14335646260 -0.0121803 34.2552419332839 -9.8626123 154.2147 /L 0.7010 322.678 110.613 Hya 2024-Jan-09 00:00 08 19 12.38 +02 14 16.4 08 20 28.24 +02 09 45.5 -4.25707 0.640930 25.540 29.023 99.99650 35.14334931033 -0.0125866 34.2496883937689 -9.3681810 154.9847 /L 0.6814 324.331 110.611 Hya 2024-Jan-10 00:00 08 19 05.54 +02 14 31.9 08 20 21.44 +02 10 01.0 -4.27688 0.667555 25.540 29.022 99.99670 35.14334192338 -0.0129929 34.2444214871468 -8.8700651 155.7355 /L 0.6623 326.081 110.610 Hya 2024-Jan-11 00:00 08 18 58.68 +02 14 48.0 08 20 14.60 +02 10 17.1 -4.29522 0.693985 25.539 29.021 99.99688 35.14333430180 -0.0133992 34.2394432705203 -8.3685202 156.4650 /L 0.6436 327.935 110.609 Hya 2024-Jan-12 00:00 08 18 51.78 +02 15 04.8 08 20 07.73 +02 10 34.0 -4.31206 0.720197 25.539 29.020 99.99706 35.14332644562 -0.0138053 34.2347556359245 -7.8638623 157.1711 /L 0.6253 329.899 110.607 Hya 2024-Jan-13 00:00 08 18 44.86 +02 15 22.2 08 20 00.84 +02 10 51.4 -4.32737 0.746164 25.539 29.019 99.99722 35.14331835488 -0.0142115 34.2303602768923 -7.3564601 157.8517 /L 0.6076 331.980 110.606 Hya 2024-Jan-14 00:00 08 18 37.92 +02 15 40.2 08 19 53.91 +02 11 09.6 -4.34116 0.771865 25.539 29.019 99.99737 35.14331002962 -0.0146175 34.2262586641624 -6.8467115 158.5042 /L 0.5906 334.184 110.605 Hya 2024-Jan-15 00:00 08 18 30.96 +02 15 58.8 08 19 46.96 +02 11 28.3 -4.35342 0.797280 25.538 29.018 99.99752 35.14330146986 -0.0150235 34.2224520378798 -6.3350115 159.1259 /L 0.5743 336.516 110.603 Hya 2024-Jan-16 00:00 08 18 23.98 +02 16 18.1 08 19 39.99 +02 11 47.6 -4.36418 0.822393 25.538 29.017 99.99765 35.14329267564 -0.0154295 34.2189414184868 -5.8217215 159.7141 /L 0.5587 338.980 110.602 Hya 2024-Jan-17 00:00 08 18 16.98 +02 16 37.9 08 19 33.00 +02 12 07.5 -4.37346 0.847195 25.538 29.017 99.99777 35.14328364700 -0.0158354 34.2157276323519 -5.3071502 160.2657 /L 0.5441 341.582 110.600 Hya 2024-Jan-18 00:00 08 18 09.96 +02 16 58.3 08 19 26.00 +02 12 28.0 -4.38127 0.871680 25.538 29.016 99.99788 35.14327438396 -0.0162412 34.2128113445545 -4.7915476 160.7775 /L 0.5304 344.321 110.599 Hya 2024-Jan-19 00:00 08 18 02.94 +02 17 19.3 08 19 18.99 +02 12 49.1 -4.38765 0.895847 25.538 29.015 99.99798 35.14326488657 -0.0166470 34.2101930914834 -4.2751107 161.2463 /L 0.5178 347.197 110.598 Hya 2024-Jan-20 00:00 08 17 55.91 +02 17 40.9 08 19 11.97 +02 13 10.7 -4.39261 0.919693 25.537 29.015 99.99806 35.14325515485 -0.0170527 34.2078733086624 -3.7579937 161.6689 /L 0.5064 350.209 110.596 Hya 2024-Jan-21 00:00 08 17 48.87 +02 18 03.1 08 19 04.95 +02 13 32.8 -4.39617 0.943220 25.537 29.015 99.99814 35.14324518883 -0.0174584 34.2058523522640 -3.2403189 162.0419 /L 0.4963 353.348 110.595 Hya 2024-Jan-22 00:00 08 17 41.82 +02 18 25.8 08 18 57.93 +02 13 55.6 -4.39835 0.966429 25.537 29.014 99.99820 35.14323498855 -0.0178640 34.2041305147362 -2.7221861 162.3622 /L 0.4875 356.607 110.593 Hya 2024-Jan-23 00:00 08 17 34.78 +02 18 49.0 08 18 50.90 +02 14 18.9 -4.39916 0.989318 25.537 29.014 99.99825 35.14322455404 -0.0182695 34.2027080356527 -2.2036797 162.6271 /T 0.4802 359.971 110.592 Hya 2024-Jan-24 00:00 08 17 27.73 +02 19 12.9 08 18 43.87 +02 14 42.8 -4.39860 1.011889 25.537 29.014 99.99829 35.14321388532 -0.0186751 34.2015851087645 -1.6848749 162.8338 /T 0.4745 3.424 110.591 Hya 2024-Jan-25 00:00 08 17 20.68 +02 19 37.2 08 18 36.85 +02 15 07.2 -4.39668 1.034140 25.537 29.013 99.99832 35.14320298243 -0.0190805 34.2007618858311 -1.1658427 162.9804 /T 0.4703 6.946 110.589 Hya 2024-Jan-26 00:00 08 17 13.64 +02 20 02.1 08 18 29.82 +02 15 32.2 -4.39341 1.056070 25.537 29.013 99.99834 35.14319184540 -0.0194859 34.2002384775266 -0.6466551 163.0653 /T 0.4678 10.514 110.588 Hya 2024-Jan-27 00:00 08 17 06.61 +02 20 27.5 08 18 22.80 +02 15 57.7 -4.38878 1.077676 25.537 29.013 99.99834 35.14318047425 -0.0198913 34.2000149516863 -0.1273892 163.0876 /T 0.4669 14.103 110.586 Hya 2024-Jan-28 00:00 08 16 59.58 +02 20 53.4 08 18 15.78 +02 16 23.7 -4.38278 1.098955 25.537 29.013 99.99833 35.14316886902 -0.0202966 34.2000913293445 0.3918696 163.0471 /T 0.4678 17.687 110.585 Hya 2024-Jan-29 00:00 08 16 52.56 +02 21 19.8 08 18 08.77 +02 16 50.3 -4.37542 1.119901 25.537 29.013 99.99831 35.14315702973 -0.0207019 34.2004675792646 0.9110256 162.9443 /T 0.4703 21.240 110.584 Hya 2024-Jan-30 00:00 08 16 45.56 +02 21 46.7 08 18 01.77 +02 17 17.3 -4.36668 1.140509 25.537 29.014 99.99828 35.14314495642 -0.0211071 34.2011436118194 1.4299723 162.7804 /T 0.4744 24.739 110.582 Hya 2024-Jan-31 00:00 08 16 38.57 +02 22 14.1 08 17 54.79 +02 17 44.9 -4.35657 1.160774 25.537 29.014 99.99823 35.14313264910 -0.0215123 34.2021192730457 1.9485936 162.5571 /T 0.4802 28.162 110.581 Hya $$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._____(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} '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} 'dRA*cosD d(DEC)/dt' = The angular rate of change in aparent RA and DEC of the target. This is with respect to the non-inertial IAU76/80 Earth true equator and equinox of-date reference frame. d(RA)/dt is multiplied by the cosine of declination to provide a linear rate in the plane-of-sky. Units: ARCSECONDS PER HOUR 'T-mag N-mag' = Comets' apparent visual total magnitude ("T-mag") and nuclear magnitude ("N-mag") using the standard IAU model: T-mag= M1 + 5*log10(delta) + k1*log10(r) N-mag= M2 + 5*log10(delta) + k2*log10(r) + phcof*beta Units: MAGNITUDES 'Illu%' = Fraction of the target objects' assumed circular disk illuminated by Sun (phase), as seen by the observer. Units: PERCENT '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 'PsAng PsAMV' = The position angles of the extended Sun-to-target radius vector ("PsAng") and the negative of the targets' heliocentric velocity vector ("PsAMV"), as seen in the observers' plane-of-sky, measured counter-clockwise (east) from reference-frame north-pole. Primarily intended for ACTIVE COMETS, "PsAng" is an indicator of the comets' gas-tail orientation in the sky (being in the anti-sunward direction) while "PsAMV" is an indicator of dust-tail orientation. 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 ********************************************************************************************************************************************************************************************************************************