2012-02-29, GMT 15:53
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http://ssd.jpl.nasa.gov/horizons.cgi#results
target:
2023-Feb-03 08:13:02.880 13 38 06.78 -15 45 42.5 14.90 0.01237855841752 -0.0012809 105.3715 /L 73.9375
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HORIZONS Web-Interface
This tool provides a web-based limited interface to JPL's HORIZONS system which can be used to generate ephemerides for solar-system bodies. Full access to HORIZONS features is available via the primary telnet interface. HORIZONS system news shows recent changes and improvements. A web-interface tutorial is available to assist new users.
JPL/HORIZONS (2011 AG5) 2012-Feb-29 07:46:25 Rec #:734747 (+COV) Soln.date: 2011-Oct-15_00:50:11 # obs: 197 (256 days) FK5/J2000.0 helio. ecliptic osc. elements (AU, DAYS, DEG, period=Julian yrs): EPOCH= 2455644.5 ! 2011-Mar-24.00 (CT) Residual RMS= .42895 EC= .3906371176786754 QR= .8719004049292063 TP= 2455644.816053564 OM= 135.7205763703037 W= 53.48251523509158 IN= 3.680497765026678 A= 1.430839373753392 MA= 359.8179970436742 ADIST= 1.989778342577579 PER= 1.71157 N= .57586111 ANGMOM= .018941824 DAN= .98381 DDN= 1.57971 L= 189.1465019 B= 2.9572041 TP= 2011-Mar-24.3160536 Physical parameters (KM, SEC, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 21.874 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#45, PHA OCC=4 2: source=ORB
******************************************************************************* Ephemeris / WWW_USER Wed Feb 29 07:46:25 2012 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2011 AG5) {source: JPL#45} Center body name: Earth (399) {source: DE405} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2023-Feb-03 07:00:02.8800 UT Stop time : A.D. 2023-Feb-03 09:00:00.0000 UT Step-size : 1 minutes ******************************************************************************* Target pole/equ : No model available Target radii : (unavailable) Center geodetic : 0.00000000,0.00000000,0.0000000 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 0.00000000,0.00000000,0.0000000 {E-lon(deg),Dxy(km),Dz(km)} Center pole/equ : High-precision EOP model {East-longitude +} Center radii : 6378.1 x 6378.1 x 6356.8 km {Equator, meridian, pole} Target primary : Sun {source: DE405} Interfering body: MOON (Req= 1737.400) km {source: DE405} Deflecting body : Sun, EARTH {source: DE405} Deflecting GMs : 1.3271E+11, 3.9860E+05 km^3/s^2 Small perturbers: Ceres, Pallas, Vesta {source: SB405-CPV-2} Small body GMs : 6.32E+01, 1.43E+01, 1.78E+01 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL EOP file : eop.120228.p120521 EOP coverage : DATA-BASED 1962-JAN-20 TO 2012-FEB-28. PREDICTS-> 2012-MAY-20 Units conversion: 1 AU= 149597870.691 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 ) ******************************************************************************* Initial FK5/J2000.0 heliocentric ecliptic osculating elements (AU, DAYS, DEG): EPOCH= 2455644.5 ! 2011-Mar-24.00 (CT) Residual RMS= .42895 EC= .3906371176786754 QR= .8719004049292063 TP= 2455644.816053564 OM= 135.7205763703037 W= 53.48251523509158 IN= 3.680497765026678 Asteroid physical parameters (KM, SEC, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 21.874 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ************************************************************************************************************** Date__(UT)__HR:MN:SC.fff R.A._(ICRF/J2000.0)_DEC APmag delta deldot S-O-T /r S-T-O ************************************************************************************************************** $$SOE 2023-Feb-03 07:00:02.880 13 32 35.70 -15 33 08.5 14.86 0.01238199477929 -0.2334485 106.6250 /L 72.6883 2023-Feb-03 07:01:02.880 13 32 40.23 -15 33 19.0 14.86 0.01238190179475 -0.2302697 106.6078 /L 72.7054 2023-Feb-03 07:02:02.880 13 32 44.76 -15 33 29.6 14.86 0.01238181008553 -0.2270909 106.5906 /L 72.7225 2023-Feb-03 07:03:02.880 13 32 49.29 -15 33 40.1 14.86 0.01238171965113 -0.2239120 106.5735 /L 72.7396 2023-Feb-03 07:04:02.880 13 32 53.82 -15 33 50.6 14.86 0.01238163049168 -0.2207330 106.5563 /L 72.7567 2023-Feb-03 07:05:02.880 13 32 58.35 -15 34 01.1 14.86 0.01238154260698 -0.2175540 106.5392 /L 72.7738 2023-Feb-03 07:06:02.880 13 33 02.88 -15 34 11.6 14.86 0.01238145599729 -0.2143749 106.5220 /L 72.7909 2023-Feb-03 07:07:02.880 13 33 07.41 -15 34 22.1 14.86 0.01238137066255 -0.2111957 106.5048 /L 72.8080 2023-Feb-03 07:08:02.880 13 33 11.94 -15 34 32.6 14.86 0.01238128660277 -0.2080165 106.4877 /L 72.8252 2023-Feb-03 07:09:02.880 13 33 16.47 -15 34 43.1 14.86 0.01238120381802 -0.2048372 106.4705 /L 72.8423 2023-Feb-03 07:10:02.880 13 33 21.00 -15 34 53.6 14.86 0.01238112230828 -0.2016578 106.4533 /L 72.8594 2023-Feb-03 07:11:02.880 13 33 25.53 -15 35 04.1 14.86 0.01238104207354 -0.1984784 106.4362 /L 72.8765 2023-Feb-03 07:12:02.880 13 33 30.06 -15 35 14.5 14.86 0.01238096311393 -0.1952990 106.4190 /L 72.8936 2023-Feb-03 07:13:02.880 13 33 34.59 -15 35 25.0 14.86 0.01238088542942 -0.1921195 106.4018 /L 72.9107 2023-Feb-03 07:14:02.880 13 33 39.13 -15 35 35.5 14.87 0.01238080901998 -0.1889399 106.3847 /L 72.9278 2023-Feb-03 07:15:02.880 13 33 43.66 -15 35 45.9 14.87 0.01238073388570 -0.1857603 106.3675 /L 72.9449 2023-Feb-03 07:16:02.880 13 33 48.19 -15 35 56.4 14.87 0.01238066002658 -0.1825806 106.3503 /L 72.9620 2023-Feb-03 07:17:02.880 13 33 52.72 -15 36 06.8 14.87 0.01238058744267 -0.1794008 106.3332 /L 72.9791 2023-Feb-03 07:18:02.880 13 33 57.25 -15 36 17.2 14.87 0.01238051613391 -0.1762210 106.3160 /L 72.9962 2023-Feb-03 07:19:02.880 13 34 01.79 -15 36 27.7 14.87 0.01238044610043 -0.1730412 106.2988 /L 73.0133 2023-Feb-03 07:20:02.880 13 34 06.32 -15 36 38.1 14.87 0.01238037734217 -0.1698613 106.2817 /L 73.0304 2023-Feb-03 07:21:02.880 13 34 10.85 -15 36 48.5 14.87 0.01238030985914 -0.1666814 106.2645 /L 73.0475 2023-Feb-03 07:22:02.880 13 34 15.38 -15 36 58.9 14.87 0.01238024365143 -0.1635014 106.2473 /L 73.0647 2023-Feb-03 07:23:02.880 13 34 19.92 -15 37 09.3 14.87 0.01238017871905 -0.1603214 106.2302 /L 73.0818 2023-Feb-03 07:24:02.880 13 34 24.45 -15 37 19.8 14.87 0.01238011506195 -0.1571413 106.2130 /L 73.0989 2023-Feb-03 07:25:02.880 13 34 28.99 -15 37 30.2 14.87 0.01238005268020 -0.1539611 106.1958 /L 73.1160 2023-Feb-03 07:26:02.880 13 34 33.52 -15 37 40.5 14.87 0.01237999157381 -0.1507810 106.1787 /L 73.1331 2023-Feb-03 07:27:02.880 13 34 38.05 -15 37 50.9 14.87 0.01237993174281 -0.1476008 106.1615 /L 73.1502 2023-Feb-03 07:28:02.880 13 34 42.59 -15 38 01.3 14.87 0.01237987318717 -0.1444205 106.1443 /L 73.1673 2023-Feb-03 07:29:02.880 13 34 47.12 -15 38 11.7 14.87 0.01237981590696 -0.1412402 106.1272 /L 73.1844 2023-Feb-03 07:30:02.880 13 34 51.66 -15 38 22.1 14.87 0.01237975990217 -0.1380599 106.1100 /L 73.2015 2023-Feb-03 07:31:02.880 13 34 56.19 -15 38 32.4 14.87 0.01237970517281 -0.1348795 106.0928 /L 73.2187 2023-Feb-03 07:32:02.880 13 35 00.73 -15 38 42.8 14.88 0.01237965171894 -0.1316991 106.0756 /L 73.2358 2023-Feb-03 07:33:02.880 13 35 05.26 -15 38 53.1 14.88 0.01237959954054 -0.1285186 106.0585 /L 73.2529 2023-Feb-03 07:34:02.880 13 35 09.80 -15 39 03.5 14.88 0.01237954863760 -0.1253381 106.0413 /L 73.2700 2023-Feb-03 07:35:02.880 13 35 14.33 -15 39 13.8 14.88 0.01237949901017 -0.1221576 106.0241 /L 73.2871 2023-Feb-03 07:36:02.880 13 35 18.87 -15 39 24.1 14.88 0.01237945065825 -0.1189770 106.0070 /L 73.3042 2023-Feb-03 07:37:02.880 13 35 23.40 -15 39 34.5 14.88 0.01237940358190 -0.1157964 105.9898 /L 73.3213 2023-Feb-03 07:38:02.880 13 35 27.94 -15 39 44.8 14.88 0.01237935778106 -0.1126158 105.9726 /L 73.3384 2023-Feb-03 07:39:02.880 13 35 32.47 -15 39 55.1 14.88 0.01237931325580 -0.1094351 105.9554 /L 73.3555 2023-Feb-03 07:40:02.880 13 35 37.01 -15 40 05.4 14.88 0.01237927000606 -0.1062545 105.9383 /L 73.3727 2023-Feb-03 07:41:02.880 13 35 41.55 -15 40 15.7 14.88 0.01237922803193 -0.1030737 105.9211 /L 73.3898 2023-Feb-03 07:42:02.880 13 35 46.08 -15 40 26.0 14.88 0.01237918733339 -0.0998930 105.9039 /L 73.4069 2023-Feb-03 07:43:02.880 13 35 50.62 -15 40 36.3 14.88 0.01237914791047 -0.0967122 105.8868 /L 73.4240 2023-Feb-03 07:44:02.880 13 35 55.16 -15 40 46.6 14.88 0.01237910976314 -0.0935314 105.8696 /L 73.4411 2023-Feb-03 07:45:02.880 13 35 59.69 -15 40 56.9 14.88 0.01237907289144 -0.0903506 105.8524 /L 73.4582 2023-Feb-03 07:46:02.880 13 36 04.23 -15 41 07.2 14.88 0.01237903729538 -0.0871697 105.8352 /L 73.4753 2023-Feb-03 07:47:02.880 13 36 08.77 -15 41 17.5 14.88 0.01237900297494 -0.0839888 105.8181 /L 73.4925 2023-Feb-03 07:48:02.880 13 36 13.30 -15 41 27.7 14.88 0.01237896993019 -0.0808079 105.8009 /L 73.5096 2023-Feb-03 07:49:02.880 13 36 17.84 -15 41 38.0 14.88 0.01237893816106 -0.0776270 105.7837 /L 73.5267 2023-Feb-03 07:50:02.880 13 36 22.38 -15 41 48.2 14.89 0.01237890766762 -0.0744461 105.7665 /L 73.5438 2023-Feb-03 07:51:02.880 13 36 26.92 -15 41 58.5 14.89 0.01237887844988 -0.0712651 105.7494 /L 73.5609 2023-Feb-03 07:52:02.880 13 36 31.46 -15 42 08.7 14.89 0.01237885050783 -0.0680841 105.7322 /L 73.5780 2023-Feb-03 07:53:02.880 13 36 35.99 -15 42 19.0 14.89 0.01237882384143 -0.0649031 105.7150 /L 73.5952 2023-Feb-03 07:54:02.880 13 36 40.53 -15 42 29.2 14.89 0.01237879845076 -0.0617221 105.6978 /L 73.6123 2023-Feb-03 07:55:02.880 13 36 45.07 -15 42 39.4 14.89 0.01237877433581 -0.0585411 105.6807 /L 73.6294 2023-Feb-03 07:56:02.880 13 36 49.61 -15 42 49.6 14.89 0.01237875149655 -0.0553600 105.6635 /L 73.6465 2023-Feb-03 07:57:02.880 13 36 54.15 -15 42 59.8 14.89 0.01237872993302 -0.0521790 105.6463 /L 73.6636 2023-Feb-03 07:58:02.880 13 36 58.69 -15 43 10.1 14.89 0.01237870964521 -0.0489979 105.6291 /L 73.6807 2023-Feb-03 07:59:02.880 13 37 03.22 -15 43 20.3 14.89 0.01237869063313 -0.0458168 105.6120 /L 73.6979 2023-Feb-03 08:00:02.880 13 37 07.76 -15 43 30.4 14.89 0.01237867289679 -0.0426357 105.5948 /L 73.7150 2023-Feb-03 08:01:02.880 13 37 12.30 -15 43 40.6 14.89 0.01237865643617 -0.0394546 105.5776 /L 73.7321 2023-Feb-03 08:02:02.880 13 37 16.84 -15 43 50.8 14.89 0.01237864125131 -0.0362735 105.5604 /L 73.7492 2023-Feb-03 08:03:02.880 13 37 21.38 -15 44 01.0 14.89 0.01237862734220 -0.0330924 105.5433 /L 73.7663 2023-Feb-03 08:04:02.880 13 37 25.92 -15 44 11.2 14.89 0.01237861470881 -0.0299112 105.5261 /L 73.7834 2023-Feb-03 08:05:02.880 13 37 30.46 -15 44 21.3 14.89 0.01237860335123 -0.0267301 105.5089 /L 73.8006 2023-Feb-03 08:06:02.880 13 37 35.00 -15 44 31.5 14.89 0.01237859326938 -0.0235489 105.4917 /L 73.8177 2023-Feb-03 08:07:02.880 13 37 39.54 -15 44 41.7 14.89 0.01237858446325 -0.0203678 105.4746 /L 73.8348 2023-Feb-03 08:08:02.880 13 37 44.08 -15 44 51.8 14.90 0.01237857693288 -0.0171866 105.4574 /L 73.8519 2023-Feb-03 08:09:02.880 13 37 48.62 -15 45 01.9 14.90 0.01237857067829 -0.0140055 105.4402 /L 73.8690 2023-Feb-03 08:10:02.880 13 37 53.16 -15 45 12.1 14.90 0.01237856569947 -0.0108243 105.4230 /L 73.8861 2023-Feb-03 08:11:02.880 13 37 57.70 -15 45 22.2 14.90 0.01237856199639 -0.0076432 105.4058 /L 73.9033 2023-Feb-03 08:12:02.880 13 38 02.24 -15 45 32.3 14.90 0.01237855956909 -0.0044620 105.3887 /L 73.9204 2023-Feb-03 08:13:02.880 13 38 06.78 -15 45 42.5 14.90 0.01237855841752 -0.0012809 105.3715 /L 73.9375 2023-Feb-03 08:14:02.880 13 38 11.32 -15 45 52.6 14.90 0.01237855854173 0.0019003 105.3543 /L 73.9546 2023-Feb-03 08:15:02.880 13 38 15.87 -15 46 02.7 14.90 0.01237855994167 0.0050814 105.3371 /L 73.9717 2023-Feb-03 08:16:02.880 13 38 20.41 -15 46 12.8 14.90 0.01237856261738 0.0082626 105.3200 /L 73.9888 2023-Feb-03 08:17:02.880 13 38 24.95 -15 46 22.9 14.90 0.01237856656883 0.0114437 105.3028 /L 74.0060 2023-Feb-03 08:18:02.880 13 38 29.49 -15 46 33.0 14.90 0.01237857179607 0.0146248 105.2856 /L 74.0231 2023-Feb-03 08:19:02.880 13 38 34.03 -15 46 43.1 14.90 0.01237857829900 0.0178059 105.2684 /L 74.0402 2023-Feb-03 08:20:02.880 13 38 38.57 -15 46 53.1 14.90 0.01237858607769 0.0209871 105.2512 /L 74.0573 2023-Feb-03 08:21:02.880 13 38 43.11 -15 47 03.2 14.90 0.01237859513216 0.0241682 105.2341 /L 74.0744 2023-Feb-03 08:22:02.880 13 38 47.66 -15 47 13.3 14.90 0.01237860546233 0.0273492 105.2169 /L 74.0916 2023-Feb-03 08:23:02.880 13 38 52.20 -15 47 23.3 14.90 0.01237861706822 0.0305303 105.1997 /L 74.1087 2023-Feb-03 08:24:02.880 13 38 56.74 -15 47 33.4 14.90 0.01237862994985 0.0337114 105.1825 /L 74.1258 2023-Feb-03 08:25:02.880 13 39 01.28 -15 47 43.4 14.90 0.01237864410721 0.0368925 105.1654 /L 74.1429 2023-Feb-03 08:26:02.880 13 39 05.82 -15 47 53.5 14.91 0.01237865954026 0.0400735 105.1482 /L 74.1600 2023-Feb-03 08:27:02.880 13 39 10.37 -15 48 03.5 14.91 0.01237867624905 0.0432545 105.1310 /L 74.1772 2023-Feb-03 08:28:02.880 13 39 14.91 -15 48 13.5 14.91 0.01237869423354 0.0464355 105.1138 /L 74.1943 2023-Feb-03 08:29:02.880 13 39 19.45 -15 48 23.6 14.91 0.01237871349372 0.0496165 105.0966 /L 74.2114 2023-Feb-03 08:30:02.880 13 39 24.00 -15 48 33.6 14.91 0.01237873402957 0.0527975 105.0795 /L 74.2285 2023-Feb-03 08:31:02.880 13 39 28.54 -15 48 43.6 14.91 0.01237875584110 0.0559784 105.0623 /L 74.2456 2023-Feb-03 08:32:02.880 13 39 33.08 -15 48 53.6 14.91 0.01237877892832 0.0591594 105.0451 /L 74.2627 2023-Feb-03 08:33:02.880 13 39 37.62 -15 49 03.6 14.91 0.01237880329121 0.0623403 105.0279 /L 74.2799 2023-Feb-03 08:34:02.880 13 39 42.17 -15 49 13.6 14.91 0.01237882892974 0.0655212 105.0108 /L 74.2970 2023-Feb-03 08:35:02.880 13 39 46.71 -15 49 23.6 14.91 0.01237885584395 0.0687020 104.9936 /L 74.3141 2023-Feb-03 08:36:02.880 13 39 51.25 -15 49 33.6 14.91 0.01237888403374 0.0718829 104.9764 /L 74.3312 2023-Feb-03 08:37:02.880 13 39 55.80 -15 49 43.6 14.91 0.01237891349920 0.0750637 104.9592 /L 74.3483 2023-Feb-03 08:38:02.880 13 40 00.34 -15 49 53.5 14.91 0.01237894424026 0.0782445 104.9420 /L 74.3655 2023-Feb-03 08:39:02.880 13 40 04.89 -15 50 03.5 14.91 0.01237897625692 0.0814253 104.9249 /L 74.3826 2023-Feb-03 08:40:02.880 13 40 09.43 -15 50 13.5 14.91 0.01237900954920 0.0846060 104.9077 /L 74.3997 2023-Feb-03 08:41:02.880 13 40 13.97 -15 50 23.4 14.91 0.01237904411714 0.0877867 104.8905 /L 74.4168 2023-Feb-03 08:42:02.880 13 40 18.52 -15 50 33.4 14.91 0.01237907996047 0.0909674 104.8733 /L 74.4339 2023-Feb-03 08:43:02.880 13 40 23.06 -15 50 43.3 14.91 0.01237911707943 0.0941480 104.8562 /L 74.4510 2023-Feb-03 08:44:02.880 13 40 27.61 -15 50 53.2 14.92 0.01237915547395 0.0973286 104.8390 /L 74.4682 2023-Feb-03 08:45:02.880 13 40 32.15 -15 51 03.2 14.92 0.01237919514401 0.1005092 104.8218 /L 74.4853 2023-Feb-03 08:46:02.880 13 40 36.69 -15 51 13.1 14.92 0.01237923608958 0.1036897 104.8046 /L 74.5024 2023-Feb-03 08:47:02.880 13 40 41.24 -15 51 23.0 14.92 0.01237927831067 0.1068703 104.7874 /L 74.5195 2023-Feb-03 08:48:02.880 13 40 45.78 -15 51 32.9 14.92 0.01237932180725 0.1100507 104.7703 /L 74.5366 2023-Feb-03 08:49:02.880 13 40 50.33 -15 51 42.8 14.92 0.01237936657932 0.1132312 104.7531 /L 74.5538 2023-Feb-03 08:50:02.880 13 40 54.87 -15 51 52.7 14.92 0.01237941262684 0.1164116 104.7359 /L 74.5709 2023-Feb-03 08:51:02.880 13 40 59.42 -15 52 02.6 14.92 0.01237945994979 0.1195919 104.7187 /L 74.5880 2023-Feb-03 08:52:02.880 13 41 03.96 -15 52 12.5 14.92 0.01237950854817 0.1227722 104.7015 /L 74.6051 2023-Feb-03 08:53:02.880 13 41 08.51 -15 52 22.4 14.92 0.01237955842199 0.1259525 104.6844 /L 74.6222 2023-Feb-03 08:54:02.880 13 41 13.05 -15 52 32.3 14.92 0.01237960957120 0.1291328 104.6672 /L 74.6393 2023-Feb-03 08:55:02.880 13 41 17.60 -15 52 42.1 14.92 0.01237966199575 0.1323130 104.6500 /L 74.6565 2023-Feb-03 08:56:02.880 13 41 22.14 -15 52 52.0 14.92 0.01237971569571 0.1354931 104.6328 /L 74.6736 2023-Feb-03 08:57:02.880 13 41 26.69 -15 53 01.8 14.92 0.01237977067099 0.1386732 104.6157 /L 74.6907 2023-Feb-03 08:58:02.880 13 41 31.23 -15 53 11.7 14.92 0.01237982692159 0.1418533 104.5985 /L 74.7078 2023-Feb-03 08:59:02.880 13 41 35.78 -15 53 21.5 14.92 0.01237988444753 0.1450333 104.5813 /L 74.7249 $$EOE ************************************************************************************************************** Column meaning: TIME Prior to 1962, times are UT1. Dates thereafter are UTC. Any 'b' symbol in the 1st-column denotes a B.C. date. First-column blank (" ") denotes an A.D. date. Calendar dates prior to 1582-Oct-15 are in the Julian calendar system. Later calendar dates are in the Gregorian system. The uniform Coordinate Time scale is used internally. Conversion between CT and the selected non-uniform UT output scale has not been determined for UTC times after the next July or January 1st. The last known leap-second is used over any future interval. NOTE: "n.a." in output means quantity "not available" at the print-time. R.A._(ICRF/J2000.0)_DEC = J2000.0 astrometric right ascension and declination of target center. Corrected for light-time. Units: HMS (HH MM SS.ff) and DMS (DD MM SS.f) APmag = Asteroid's approximate apparent visual magnitude by following definition: APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi1 + G*phi2). In principle, accurate to ~ +/- 0.1 magnitude. For solar phase angles > 90 deg, the error could exceed 1 magnitude. No values are output for phase angles greater than 120 degrees, since the extrapolation error could be large and unknown. Units: NONE delta deldot = Range ("delta") and range-rate ("delta-dot") of target center with respect to the observer at the instant light seen by the observer at print-time would have left the target center (print-time minus down-leg light-time); the distance traveled by a light ray emanating from the center of the target and recorded by the observer at print-time. "deldot" is a projection of the velocity vector along this ray, the light-time-corrected line-of-sight from the coordinate center, and indicates relative motion. A positive "deldot" means the target center is moving away from the observer (coordinate center). A negative "deldot" means the target center is moving toward the observer. Units: AU and KM/S S-O-T /r = Sun-Observer-Target angle; target's apparent solar elongation seen from observer location at print-time. If negative, the target center is behind the Sun. Angular units: DEGREES. The '/r' column is a Sun-relative code, output for observing sites with defined rotation models only. /T indicates target trails Sun (evening sky) /L indicates target leads Sun (morning sky) NOTE: The S-O-T solar elongation angle is the total separation in any direction. It does not indicate the angle of Sun leading or trailing. S-T-O = Sun-Target-Observer (~ PHASE ANGLE) angle: the vertex angle at target center formed by a vector to the apparent center of the Sun and a vector intersecting the observer at print-time. This measurable angle is within 20 arcseconds (0.006 deg) of the reduced PHASE ANGLE at observer's location at print time. The difference is due to down-leg stellar aberration affecting measured target position but not apparent solar illumination direction. When computing phase, Horizons uses the true phase angle, not S-T-O, but the resulting difference in illuminated fraction is less than 0.001%. Units: DEGREES Computations by ... Solar System Dynamics Group, Horizons On-Line Ephemeris System 4800 Oak Grove Drive, Jet Propulsion Laboratory Pasadena, CA 91109 USA Information: http://ssd.jpl.nasa.gov/ Connect : telnet://ssd.jpl.nasa.gov:6775 (via browser) telnet ssd.jpl.nasa.gov 6775 (via command-line) Author : Jon.Giorgini@jpl.nasa.gov **************************************************************************************************************
2012-Feb-29 15:46 UT
(server date/time)
Site Manager:
Donald K. Yeomans
Alan B. Chamberlin