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******************************************************************************* Ephemeris / WWW_USER Tue Oct 31 20:36:03 2017 Pasadena, USA / Horizons ******************************************************************************* Target body name: A/2017 U1 {source: JPL#8} Center body name: Earth (399) {source: DE431} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2015-Jan-01 00:00:00.0000 UT Stop time : A.D. 2017-Nov-09 00:00:00.0000 UT Step-size : 14400 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 Vis. interferer : MOON (R_eq= 1737.400) km {source: DE431} Rel. light bend : Sun, EARTH {source: DE431} Rel. lght bnd GM: 1.3271E+11, 3.9860E+05 km^3/s^2 Small-body perts: Yes {source: SB431-N16} Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL EOP file : eop.171031.p180122 EOP coverage : DATA-BASED 1962-JAN-20 TO 2017-OCT-31. PREDICTS-> 2018-JAN-21 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= 2458052.5 ! 2017-Oct-26.00 (TDB) Residual RMS= .25428 EC= 1.197188708990351 QR= .2544567273446408 TP= 2458005.9728925824 OM= 24.60295925659798 W= 241.5429238264925 IN= 122.604016492383 Equivalent ICRF heliocentric equatorial cartesian coordinates (au, au/d): X= 1.265192142735180E+00 Y= 5.019137865366655E-01 Z= 2.485427616088531E-01 VX= 2.372224486193172E-02 VY= 1.287526158369990E-03 VZ= 9.625387351905917E-03 Asteroid physical parameters (km, seconds, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 22.08 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ******************************************************************************************************* Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC APmag delta deldot S-O-T /r S-T-O ******************************************************************************************************* $$SOE 2015-Jan-01 00:00 18 29 17.96 +30 53 45.6 34.93 18.3452950032654 -27.7861342 54.0640 /L 2.5657 2015-Jan-11 00:00 18 31 44.48 +30 56 46.9 34.89 18.1766013088859 -30.6208507 54.5264 /L 2.6042 2015-Jan-21 00:00 18 34 08.16 +31 04 15.3 34.85 17.9916591676816 -33.4015924 56.1109 /L 2.6806 2015-Jan-31 00:00 18 36 24.86 +31 16 04.8 34.81 17.7910845755396 -36.0089021 58.7105 /L 2.7881 2015-Feb-10 00:00 18 38 30.61 +31 32 00.4 34.78 17.5761599627068 -38.3684681 62.1678 /L 2.9171 2015-Feb-20 00:00 18 40 21.65 +31 51 43.6 34.74 17.3483878145613 -40.4445766 66.3155 /L 3.0561 2015-Mar-02 00:00 18 41 54.11 +32 14 48.2 34.69 17.1097138507767 -42.1280039 70.9849 /L 3.1930 2015-Mar-12 00:00 18 43 04.66 +32 40 40.7 34.65 16.8625119223891 -43.3998892 76.0212 /L 3.3182 2015-Mar-22 00:00 18 43 50.27 +33 08 44.5 34.60 16.6091888363651 -44.2347941 81.2944 /L 3.4233 2015-Apr-01 00:00 18 44 08.15 +33 38 14.4 34.55 16.3524963536049 -44.5653769 86.6783 /L 3.5020 2015-Apr-11 00:00 18 43 56.47 +34 08 21.1 34.50 16.0952647707168 -44.4273151 92.0567 /L 3.5516 2015-Apr-21 00:00 18 43 13.86 +34 38 12.9 34.44 15.8401901503575 -43.8091412 97.3229 /L 3.5711 2015-May-01 00:00 18 41 59.80 +35 06 51.4 34.38 15.5901201016452 -42.7066103 102.3554 /L 3.5627 2015-May-11 00:00 18 40 15.08 +35 33 19.6 34.32 15.3476224326993 -41.1950388 107.0283 /L 3.5323 2015-May-21 00:00 18 38 01.20 +35 56 41.0 34.27 15.1150135197845 -39.2809635 111.2085 /L 3.4878 2015-May-31 00:00 18 35 21.14 +36 15 58.8 34.21 14.8944980943200 -37.0282316 114.7437 /L 3.4398 2015-Jun-10 00:00 18 32 19.09 +36 30 25.9 34.15 14.6877260521874 -34.5299666 117.4830 /L 3.4009 2015-Jun-20 00:00 18 29 00.08 +36 39 21.0 34.10 14.4960341636788 -31.8160887 119.2888 /L 3.3830 2015-Jun-30 00:00 18 25 30.45 +36 42 12.6 34.05 14.3203725456188 -29.0019235 120.0529 /T 3.3957 2015-Jul-10 00:00 18 21 57.06 +36 38 46.1 34.00 14.1610232072292 -26.1730764 119.7262 /T 3.4450 2015-Jul-20 00:00 18 18 26.93 +36 28 56.8 33.96 14.0179541924203 -23.3837622 118.3244 /T 3.5299 2015-Jul-30 00:00 18 15 07.45 +36 12 57.2 33.93 13.8905602235468 -20.7635616 115.9290 /T 3.6441 2015-Aug-09 00:00 18 12 05.21 +35 51 15.4 33.89 13.7776628638200 -18.3662864 112.6662 /T 3.7776 2015-Aug-19 00:00 18 09 26.16 +35 24 28.6 33.86 13.6778319936429 -16.2606643 108.6812 /T 3.9171 2015-Aug-29 00:00 18 07 15.44 +34 53 28.4 33.83 13.5890571370372 -14.5466037 104.1305 /T 4.0491 2015-Sep-08 00:00 18 05 36.63 +34 19 13.7 33.79 13.5090294707635 -13.2321962 99.1572 /T 4.1625 2015-Sep-18 00:00 18 04 32.40 +33 42 46.0 33.76 13.4352980930925 -12.3820983 93.8909 /T 4.2470 2015-Sep-28 00:00 18 04 04.14 +33 05 13.6 33.72 13.3650146149290 -12.0346475 88.4597 /T 4.2960 2015-Oct-08 00:00 18 04 11.79 +32 27 41.8 33.69 13.2953869648347 -12.1555458 82.9755 /T 4.3068 2015-Oct-18 00:00 18 04 54.72 +31 51 13.7 33.65 13.2236048414083 -12.7853122 77.5498 /T 4.2790 2015-Oct-28 00:00 18 06 11.07 +31 16 51.8 33.60 13.1467683736253 -13.8906837 72.3062 /T 4.2166 2015-Nov-07 00:00 18 07 58.19 +30 45 29.6 33.55 13.0623490551474 -15.4119609 67.3687 /T 4.1279 2015-Nov-17 00:00 18 10 13.12 +30 17 57.1 33.50 12.9679160376946 -17.3510519 62.8795 /T 4.0236 2015-Nov-27 00:00 18 12 51.96 +29 54 58.9 33.45 12.8612863352023 -19.6138447 59.0021 /T 3.9187 2015-Dec-07 00:00 18 15 50.57 +29 37 09.3 33.40 12.7408376947387 -22.1358305 55.9025 /T 3.8308 2015-Dec-17 00:00 18 19 04.61 +29 24 59.5 33.34 12.6051422452959 -24.8769296 53.7471 /T 3.7772 2015-Dec-27 00:00 18 22 29.03 +29 18 52.1 33.28 12.4532928076526 -27.7090268 52.6720 /T 3.7737 2016-Jan-06 00:00 18 25 58.93 +29 19 00.8 33.23 12.2849647881033 -30.5798843 52.7474 /L 3.8304 2016-Jan-16 00:00 18 29 29.14 +29 25 35.9 33.17 12.1000892701962 -33.4169810 53.9671 /L 3.9489 2016-Jan-26 00:00 18 32 54.02 +29 38 37.2 33.11 11.8992509231328 -36.0946569 56.2407 /L 4.1227 2016-Feb-05 00:00 18 36 08.29 +29 57 57.2 33.05 11.6834776654168 -38.5829189 59.4253 /L 4.3395 2016-Feb-15 00:00 18 39 06.23 +30 23 23.4 32.99 11.4540647675455 -40.7950724 63.3551 /L 4.5818 2016-Feb-25 00:00 18 41 42.03 +30 54 30.7 32.92 11.2129208794263 -42.6430118 67.8570 /L 4.8323 2016-Mar-06 00:00 18 43 50.27 +31 30 47.9 32.85 10.9621558787353 -44.1202620 72.7792 /L 5.0749 2016-Mar-16 00:00 18 45 25.10 +32 11 35.4 32.78 10.7041109179825 -45.1464480 77.9855 /L 5.2946 2016-Mar-26 00:00 18 46 21.12 +32 55 58.7 32.70 10.4415433373527 -45.6933843 83.3463 /L 5.4802 2016-Apr-05 00:00 18 46 33.42 +33 42 57.3 32.61 10.1771496174190 -45.7735292 88.7508 /L 5.6245 2016-Apr-15 00:00 18 45 57.19 +34 31 17.5 32.53 9.91377686981776 -45.3335705 94.0867 /L 5.7228 2016-Apr-25 00:00 18 44 28.98 +35 19 31.2 32.43 9.65437467891276 -44.4110486 99.2308 /L 5.7764 2016-May-05 00:00 18 42 06.47 +36 06 05.6 32.34 9.40160670576738 -43.0337548 104.0589 /L 5.7915 2016-May-15 00:00 18 38 48.76 +36 49 13.5 32.24 9.15814356987219 -41.1978470 108.4268 /L 5.7784 2016-May-25 00:00 18 34 37.79 +37 27 03.8 32.15 8.92637830188198 -38.9978776 112.1714 /L 5.7542 2016-Jun-04 00:00 18 29 37.66 +37 57 49.0 32.05 8.70825060962801 -36.4778793 115.1279 /L 5.7394 2016-Jun-14 00:00 18 23 55.52 +38 19 41.4 31.96 8.50548776733840 -33.7001069 117.1328 /L 5.7552 2016-Jun-24 00:00 18 17 41.94 +38 31 13.6 31.88 8.31918812920622 -30.7919236 118.0537 /L 5.8219 2016-Jul-04 00:00 18 11 09.37 +38 31 20.7 31.79 8.14992070941234 -27.8115216 117.8183 /T 5.9524 2016-Jul-14 00:00 18 04 32.65 +38 19 22.7 31.72 7.99781499532461 -24.8773086 116.4287 /T 6.1479 2016-Jul-24 00:00 17 58 07.34 +37 55 21.5 31.65 7.86221411086305 -22.1070395 113.9648 /T 6.4002 2016-Aug-03 00:00 17 52 07.95 +37 19 49.6 31.59 7.74201830090271 -19.5577864 110.5586 /T 6.6911 2016-Aug-13 00:00 17 46 48.18 +36 33 51.3 31.52 7.63559644908513 -17.3585862 106.3769 /T 6.9957 2016-Aug-23 00:00 17 42 18.71 +35 39 03.6 31.46 7.54069369793195 -15.5707445 101.5935 /T 7.2895 2016-Sep-02 00:00 17 38 47.23 +34 37 14.7 31.40 7.45486911748305 -14.2307698 96.3656 /T 7.5492 2016-Sep-12 00:00 17 36 19.08 +33 30 27.6 31.33 7.37526029406490 -13.4246554 90.8450 /T 7.7547 2016-Sep-22 00:00 17 34 56.10 +32 20 49.8 31.27 7.29878951684239 -13.1364392 85.1667 /T 7.8936 2016-Oct-02 00:00 17 34 38.19 +31 10 18.8 31.19 7.22248797995776 -13.3772704 79.4467 /T 7.9587 2016-Oct-12 00:00 17 35 23.63 +30 00 51.8 31.11 7.14319773408048 -14.1629229 73.8072 /T 7.9490 2016-Oct-22 00:00 17 37 08.64 +28 54 13.2 31.03 7.05798594094567 -15.4157407 68.3672 /T 7.8732 2016-Nov-01 00:00 17 39 49.15 +27 51 52.9 30.94 6.96421642544532 -17.1292457 63.2486 /T 7.7458 2016-Nov-11 00:00 17 43 20.17 +26 55 16.9 30.84 6.85931376597035 -19.2522647 58.5979 /T 7.5894 2016-Nov-21 00:00 17 47 35.88 +26 05 34.9 30.73 6.74124245745801 -21.6791662 54.5730 /T 7.4364 2016-Dec-01 00:00 17 52 30.90 +25 23 48.2 30.62 6.60830922824292 -24.3923380 51.3434 /T 7.3240 2016-Dec-11 00:00 17 57 59.06 +24 50 55.2 30.50 6.45909500404535 -27.2932652 49.0824 /T 7.2936 2016-Dec-21 00:00 18 03 54.00 +24 27 40.8 30.38 6.29285834772732 -30.2821301 47.9258 /T 7.3857 2016-Dec-31 00:00 18 10 09.79 +24 14 49.5 30.26 6.10914363087827 -33.3320644 47.9453 /L 7.6297 2017-Jan-10 00:00 18 16 39.49 +24 13 03.8 30.13 5.90791648840595 -36.3229607 49.1240 /L 8.0387 2017-Jan-20 00:00 18 23 16.28 +24 22 57.4 30.00 5.68978488682344 -39.1861870 51.3559 /L 8.6095 2017-Jan-30 00:00 18 29 53.20 +24 45 11.2 29.86 5.45553816370320 -41.8863869 54.4863 /L 9.3233 2017-Feb-09 00:00 18 36 21.89 +25 20 24.1 29.71 5.20645200739339 -44.3073432 58.3348 /L 10.1520 2017-Feb-19 00:00 18 42 33.88 +26 09 13.2 29.54 4.94427528319026 -46.4217721 62.7276 /L 11.0672 2017-Mar-01 00:00 18 48 19.28 +27 12 28.9 29.37 4.67084853382174 -48.1855542 67.5170 /L 12.0395 2017-Mar-11 00:00 18 53 25.69 +28 30 59.4 29.17 4.38849552645612 -49.5045961 72.5656 /L 13.0412 2017-Mar-21 00:00 18 57 39.10 +30 05 38.7 28.96 4.09979875019974 -50.3823785 77.7521 /L 14.0525 2017-Mar-31 00:00 19 00 40.73 +31 57 35.0 28.73 3.80742320422823 -50.7611890 82.9668 /L 15.0567 2017-Apr-10 00:00 19 02 05.51 +34 07 44.7 28.47 3.51449382794839 -50.5739603 88.0814 /L 16.0450 2017-Apr-20 00:00 19 01 20.54 +36 37 02.2 28.20 3.22425334007143 -49.8237090 92.9479 /L 17.0263 2017-Apr-30 00:00 18 57 37.40 +39 25 52.5 27.90 2.94015770784741 -48.4286936 97.3815 /L 18.0253 2017-May-10 00:00 18 49 46.97 +42 32 57.4 27.59 2.66613002742755 -46.3384400 101.1227 /L 19.0994 2017-May-20 00:00 18 36 09.25 +45 54 06.9 27.25 2.40624252446428 -43.5177149 103.8300 /L 20.3553 2017-May-30 00:00 18 14 19.59 +49 18 27.8 26.91 2.16499952502429 -39.8705333 105.0758 /L 21.9496 2017-Jun-09 00:00 17 41 20.41 +52 22 35.2 26.56 1.94725193404713 -35.3857572 104.3731 /L 24.0891 2017-Jun-19 00:00 16 54 53.13 +54 24 41.1 26.23 1.75782149860281 -30.0689716 101.2776 /T 26.9897 2017-Jun-29 00:00 15 56 44.94 +54 25 38.4 25.91 1.60125927787015 -24.0505030 95.5311 /T 30.7737 2017-Jul-09 00:00 14 55 35.24 +51 36 54.7 25.61 1.48064470119815 -17.6915046 87.1776 /T 35.3673 2017-Jul-19 00:00 14 01 36.70 +45 56 41.1 25.31 1.39659514390890 -11.4913798 76.5613 /T 40.4260 2017-Jul-29 00:00 13 18 59.70 +38 07 33.1 25.00 1.34621933428624 -6.1556867 64.2212 /T 45.3077 2017-Aug-08 00:00 12 45 50.46 +29 03 09.1 24.60 1.32264234606594 -2.2965862 50.6634 /T 49.0809 2017-Aug-18 00:00 12 17 44.78 +19 20 47.6 23.99 1.31565167140532 -0.5708939 36.1135 /T 50.1625 2017-Aug-28 00:00 11 48 39.96 +09 14 55.3 22.88 1.30807158774309 -3.2590468 20.3767 /T 44.2566 2017-Sep-07 00:00 11 06 56.55 -00 47 42.3 20.93 1.24070505071219 -27.4645159 7.0588 /T 27.2335 2017-Sep-17 00:00 10 17 29.31 -05 36 30.1 22.85 0.96302282652494 -58.1339917 21.6673 /L 85.5359 2017-Sep-27 00:00 09 40 59.21 -06 15 56.1 23.95 0.62882962178921 -56.9347195 38.4689 /L 104.0319 2017-Oct-07 00:00 08 30 26.62 -06 10 54.0 22.85 0.31206528599390 -50.7205247 64.6048 /L 97.3471 2017-Oct-17 00:00 02 51 09.62 +00 42 55.0 19.65 0.17961467744409 26.5329100 157.4745 /L 19.1317 2017-Oct-27 00:00 23 59 47.46 +04 56 48.3 22.20 0.46194271745285 58.1677634 148.1192 /T 21.9028 2017-Nov-06 00:00 23 27 47.82 +05 44 51.8 23.92 0.81166852257351 62.2102260 130.8337 /T 27.1957 $$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. Time tags refer to the same instant throughout the solar system, regardless of where the observer is located. For example, if an observation from the surface of another body has an output time-tag of 12:31:00 UTC, an Earth-based time-scale, it refers to the instant on that body simultaneous to 12:31:00 UTC on Earth. The Barycentric Dynamical Time scale (TDB) is used internally as defined by the planetary equations of motion. Conversion between TDB and the selected non-uniform UT output time-scale has not been determined for UTC times after the next July or January 1st. The last known leap-second is used as a constant over future intervals. 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. Adjusted for light-time. Units: HMS (HH MM SS.ff) and DMS (DD MM SS.f) APmag = Asteroid's approximate apparent visual magnitude from the standard IAU H-G magnitude relationship: APmag = H + 5*log10(delta) + 5*log10(r) - 2.5*log10((1-G)*phi1 + G*phi2). 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. Units: MAGNITUDE 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 the observer location at print-time. Angular units: DEGREES The '/r' column indicates the target's apparent position relative to the Sun in the observer's sky, as described below: For an observing location on the surface of a rotating body (considering its rotational sense): /T indicates target TRAILS Sun (evening sky; rises and sets AFTER Sun) /L indicates target LEADS Sun (morning sky; rises and sets BEFORE Sun) For an observing point NOT on a rotating body (such as a spacecraft), the "leading" and "trailing" condition is defined by the observer's heliocentric orbital motion: if continuing in the observer's current direction of heliocentric motion would encounter the target's 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 target's, the target TRAILS the Sun. NOTE: 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 are defined in the equator of a spherical coordinate system. S-T-O = "S-T-O" is the Sun->Target->Observer angle; the interior vertex angle at target center formed by a vector to the apparent center of the Sun at reflection time on the target and the apparent vector 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 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.D.Giorgini@jpl.nasa.gov *******************************************************************************************************