******************************************************************************* JPL/HORIZONS (2012 DA14) 2013-Feb-11 14:36:30 Rec #:728732 (+COV) Soln.date: 2013-Feb-11_01:50:14 # obs: 268 (2012-2013) FK5/J2000.0 helio. ecliptic osc. elements (AU, DAYS, DEG, period=Julian yrs): EPOCH= 2456070.5 ! 2012-May-23.00 (CT) Residual RMS= .26385 EC= .1081577250495572 QR= .893424700420181 TP= 2455895.3362481799 OM= 147.2687864263996 W= 271.0993162606687 IN= 10.33697017493406 A= 1.001774333325729 MA= 172.1842654142956 ADIST= 1.110123966231276 PER= 1.00268 N= .98299028 ANGMOM= .017116352 DAN= .9880100000000001 DDN= .99211 L= 58.386235 B= -10.3350467 TP= 2011-Nov-29.8362481799 Physical parameters (KM, SEC, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 24.109 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#43, OCC=0 2: source=ORB ******************************************************************************* IBOD = 399 ELPOS = T ARR(1)= 37.616700000000 ******************************************************************************* Ephemeris / WWW_USER Mon Feb 11 14:36:30 2013 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2012 DA14) {source: JPL#43} Center body name: Earth (399) {source: DE405} Center-site name: (user defined site below) ******************************************************************************* Start time : A.D. 2013-Feb-15 00:00:00.0000 UT Stop time : A.D. 2013-Mar-16 00:00:00.0000 UT Step-size : 1440 minutes ******************************************************************************* Target pole/equ : No model available Target radii : (unavailable) Center geodetic : 37.6167000,55.7500445,0.0006271 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 37.6167000,3597.88462,5248.8269 {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} Vis. interferer : MOON (R_eq= 1737.400) km {source: DE405} Rel. light bend : Sun, EARTH {source: DE405} Rel. lght bnd GM: 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.130208.p130502 EOP coverage : DATA-BASED 1962-JAN-20 TO 2013-FEB-08. PREDICTS-> 2013-MAY-01 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= 2456070.5 ! 2012-May-23.00 (CT) Residual RMS= .26385 EC= .1081577250495572 QR= .893424700420181 TP= 2455895.3362481799 OM= 147.2687864263996 W= 271.0993162606687 IN= 10.33697017493406 Asteroid physical parameters (KM, SEC, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 24.109 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 2013-Feb-15 00:00 00 38 11.92 -75 04 04.5 15.91 0.00306744455535 -6.2509419 66.2370 /T 113.5989 2013-Feb-16 00:00 12 48 52.47 +77 38 18.1 10.85 0.00074286569120 6.3118977 111.3205 /L 68.6406 2013-Feb-17 00:00 20 56 38.42 +84 11 44.2 15.20 0.00437165211136 6.2068213 96.4917 /L 83.2578 2013-Feb-18 00:00 21 28 58.24 +82 58 21.2 16.56 0.00795466092026 6.1645308 94.7769 /L 84.7651 2013-Feb-19 00:00 m 21 38 13.06 +82 28 57.0 17.39 0.01152116864751 6.1424842 93.9134 /L 85.4221 2013-Feb-20 00:00 m 21 42 28.08 +82 13 15.0 17.99 0.01507724859633 6.1256921 93.2955 /L 85.8343 2013-Feb-21 00:00 m 21 44 50.30 +82 03 30.0 18.46 0.01862453452361 6.1102584 92.7817 /L 86.1429 2013-Feb-22 00:00 m 21 46 18.42 +81 56 50.7 18.85 0.02216329952931 6.0947431 92.3214 /L 86.3985 2013-Feb-23 00:00 m 21 47 16.89 +81 51 59.4 19.18 0.02569326634743 6.0785030 91.8920 /L 86.6237 2013-Feb-24 00:00 m 21 47 57.82 +81 48 15.9 19.47 0.02921389804577 6.0612162 91.4820 /L 86.8302 2013-Feb-25 00:00 m 21 48 27.97 +81 45 17.6 19.72 0.03272452282007 6.0427085 91.0848 /L 87.0244 2013-Feb-26 00:00 m 21 48 51.45 +81 42 50.5 19.95 0.03622439324045 6.0228778 90.6966 /L 87.2103 2013-Feb-27 00:00 m 21 49 10.92 +81 40 46.3 20.16 0.03971271509519 6.0016566 90.3148 /L 87.3906 2013-Feb-28 00:00 m 21 49 28.17 +81 38 59.3 20.35 0.04318866031784 5.9789911 89.9380 /L 87.5666 2013-Mar-01 00:00 m 21 49 44.41 +81 37 25.9 20.52 0.04665137107921 5.9548302 89.5650 /L 87.7396 2013-Mar-02 00:00 m 21 50 00.43 +81 36 04.0 20.68 0.05009995922810 5.9291195 89.1953 /L 87.9102 2013-Mar-03 00:00 m 21 50 16.73 +81 34 51.9 20.83 0.05353350390946 5.9018001 88.8284 /L 88.0790 2013-Mar-04 00:00 m 21 50 33.54 +81 33 48.6 20.98 0.05695104930480 5.8728100 88.4640 /L 88.2461 2013-Mar-05 00:00 m 21 50 50.93 +81 32 53.3 21.11 0.06035160371000 5.8420871 88.1021 /L 88.4119 2013-Mar-06 00:00 21 51 08.79 +81 32 05.3 21.23 0.06373414060612 5.8095730 87.7425 /L 88.5765 2013-Mar-07 00:00 21 51 26.96 +81 31 23.9 21.35 0.06709760203051 5.7752167 87.3851 /L 88.7400 2013-Mar-08 00:00 21 51 45.19 +81 30 48.3 21.46 0.07044090437360 5.7389793 87.0299 /L 88.9026 2013-Mar-09 00:00 21 52 03.22 +81 30 17.5 21.57 0.07376294654712 5.7008379 86.6767 /L 89.0645 2013-Mar-10 00:00 21 52 20.79 +81 29 50.4 21.67 0.07706262014837 5.6607882 86.3254 /L 89.2259 2013-Mar-11 00:00 21 52 37.71 +81 29 25.7 21.77 0.08033882077520 5.6188456 85.9758 /L 89.3870 2013-Mar-12 00:00 21 52 53.84 +81 29 02.2 21.86 0.08359045920958 5.5750441 85.6277 /L 89.5481 2013-Mar-13 00:00 21 53 09.13 +81 28 38.3 21.95 0.08681647106252 5.5294322 85.2809 /L 89.7094 2013-Mar-14 00:00 21 53 23.60 +81 28 12.8 22.03 0.09001582379583 5.4820680 84.9352 /L 89.8713 2013-Mar-15 00:00 21 53 37.39 +81 27 44.1 22.11 0.09318752072632 5.4330143 84.5904 /L 90.0340 2013-Mar-16 00:00 21 53 50.67 +81 27 11.1 22.19 0.09633060233379 5.3823342 84.2461 /L 90.1979 $$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 universe, regardless of where the observer is located. The uniform Coordinate Time scale is used internally. It is equivalent to the current IAU definition of "TDB". 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. SOLAR PRESENCE (OBSERVING SITE) Time tag is followed by a blank, then a solar-presence symbol: '*' 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 (OBSERVING SITE) The solar-presence symbol is immediately followed by a lunar-presence symbol: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric ephemeris 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 *******************************************************************************************************