******************************************************************************* JPL/HORIZONS 2 Pallas 2011-May-27 17:38:46 Rec #: 2 (+COV) Soln.date: 2011-Feb-04_09:54:57 # obs: 7575 (1825-2010) FK5/J2000.0 helio. ecliptic osc. elements (AU, DAYS, DEG, period=Julian yrs): EPOCH= 2455400.5 ! 2010-Jul-23.00 (CT) Residual RMS= .37099 EC= .2309995596581508 QR= 2.131787040235174 TP= 2454950.24014609 OM= 173.1294969268293 W= 310.1509424754423 IN= 34.84090359779853 A= 2.772153211365543 MA= 96.14826598177271 ADIST= 3.412519382495912 PER= 4.61566 N= .213539504 ANGMOM= .027866492 DAN= 2.28402 DDN= 3.08352 L= 128.9163234 B= -25.8917316 TP= 2009-Apr-28.7401461 Physical parameters (KM, SEC, rotational period in hours): GM= 14.3 RAD= 272.5 ROTPER= 7.8132 H= 4.13 G= .110 B-V= .635 ALBEDO= .1587 STYP= B ASTEROID comments: 1: soln ref.= JPL#25, OCC=0 2: source=ORB ******************************************************************************* ******************************************************************************* Ephemeris / WWW_USER Fri May 27 17:38:46 2011 Pasadena, USA / Horizons ******************************************************************************* Target body name: 2 Pallas {source: JPL#25} Center body name: Earth (399) {source: DE405} Center-site name: Mauna Kea ******************************************************************************* Start time : A.D. 2011-May-29 10:00:00.0000 UT Stop time : A.D. 2011-May-29 12:30:00.0000 UT Step-size : 5 minutes ******************************************************************************* Target pole/equ : No model available Target radii : 272.5 km Center geodetic : 204.527800,19.8261152,4.2078485 {E-lon(deg),Lat(deg),Alt(km)} Center cylindric: 204.527800,6006.35451,2151.0229 {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, Vesta {source: SB405-CPV-2} Small body GMs : 6.32E+01, 1.78E+01 km^3/s^2 Atmos refraction: NO (AIRLESS) RA format : HMS Time format : CAL RTS-only print : NO EOP file : eop.110527.p110818 EOP coverage : DATA-BASED 1962-JAN-20 TO 2011-MAY-27. PREDICTS-> 2011-AUG-17 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= 2455400.5 ! 2010-Jul-23.00 (CT) Residual RMS= .37099 EC= .2309995596581508 QR= 2.131787040235174 TP= 2454950.24014609 OM= 173.1294969268293 W= 310.1509424754423 IN= 34.84090359779853 Asteroid physical parameters (KM, SEC, rotational period in hours): GM= 14.3 RAD= 272.5 ROTPER= 7.8132 H= 4.13 G= .110 B-V= .635 ALBEDO= .1587 STYP= B ******************************************************************************* Date__(UT)__HR:MN R.A._(ICRF/J2000.0)_DEC dRA*cosD d(DEC)/dt APmag S-brt ******************************************************************************* $$SOE 2011-May-29 10:00 20 31 08.13 +17 35 09.2 -2.92899 14.95554 10.06 6.81 2011-May-29 10:05 20 31 08.11 +17 35 10.5 -2.94620 14.95258 10.06 6.81 2011-May-29 10:10 20 31 08.09 +17 35 11.7 -2.96326 14.94951 10.06 6.81 2011-May-29 10:15 20 31 08.08 +17 35 13.0 -2.98017 14.94635 10.06 6.81 2011-May-29 10:20 20 31 08.06 +17 35 14.2 -2.99693 14.94309 10.06 6.81 2011-May-29 10:25 20 31 08.04 +17 35 15.5 -3.01351 14.93974 10.06 6.81 2011-May-29 10:30 20 31 08.02 +17 35 16.7 -3.02992 14.93630 10.06 6.81 2011-May-29 10:35 20 31 08.01 +17 35 18.0 -3.04616 14.93276 10.06 6.81 2011-May-29 10:40 20 31 07.99 +17 35 19.2 -3.06220 14.92913 10.06 6.81 2011-May-29 10:45 20 31 07.97 +17 35 20.5 -3.07806 14.92541 10.06 6.81 2011-May-29 10:50 20 31 07.95 +17 35 21.7 -3.09371 14.92160 10.06 6.81 2011-May-29 10:55 20 31 07.93 +17 35 22.9 -3.10916 14.91771 10.06 6.81 2011-May-29 11:00 20 31 07.92 +17 35 24.2 -3.12439 14.91373 10.06 6.81 2011-May-29 11:05 20 31 07.90 +17 35 25.4 -3.13941 14.90966 10.06 6.81 2011-May-29 11:10 20 31 07.88 +17 35 26.7 -3.15420 14.90551 10.06 6.81 2011-May-29 11:15 20 31 07.86 +17 35 27.9 -3.16876 14.90128 10.06 6.81 2011-May-29 11:20 20 31 07.84 +17 35 29.2 -3.18309 14.89697 10.06 6.81 2011-May-29 11:25 20 31 07.82 +17 35 30.4 -3.19717 14.89258 10.06 6.81 2011-May-29 11:30 20 31 07.81 +17 35 31.6 -3.21101 14.88812 10.06 6.81 2011-May-29 11:35 20 31 07.79 +17 35 32.9 -3.22459 14.88358 10.06 6.81 2011-May-29 11:40 20 31 07.77 +17 35 34.1 -3.23792 14.87896 10.06 6.81 2011-May-29 11:45 20 31 07.75 +17 35 35.4 -3.25098 14.87428 10.06 6.81 2011-May-29 11:50 20 31 07.73 +17 35 36.6 -3.26378 14.86952 10.06 6.81 2011-May-29 11:55 20 31 07.71 +17 35 37.8 -3.27630 14.86470 10.06 6.81 2011-May-29 12:00 20 31 07.69 +17 35 39.1 -3.28854 14.85981 10.06 6.81 2011-May-29 12:05 20 31 07.67 +17 35 40.3 -3.30050 14.85485 10.06 6.81 2011-May-29 12:10 20 31 07.65 +17 35 41.6 -3.31217 14.84983 10.06 6.81 2011-May-29 12:15 20 31 07.63 +17 35 42.8 -3.32355 14.84476 10.06 6.81 2011-May-29 12:20 20 31 07.62 +17 35 44.0 -3.33463 14.83962 10.06 6.81 2011-May-29 12:25 20 31 07.60 +17 35 45.3 -3.34541 14.83442 10.06 6.81 2011-May-29 12:30 20 31 07.58 +17 35 46.5 -3.35589 14.82918 10.06 6.81 $$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. 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 WITH TARGET RISE/TRANSIT/SET MARKER (OBSERVING SITE) The solar-presence symbol is immediately followed by another marker symbol: 'm' Refracted upper-limb of Moon on or above apparent horizon ' ' Refracted upper-limb of Moon below apparent horizon OR geocentric 'r' Rise (target body on or above cut-off RTS elevation) 't' Transit (target body at or past local maximum RTS elevation) 's' Set (target body on or below cut-off RTS elevation) RTS MARKERS (TVH) Rise and set are with respect to the reference ellipsoid true visual horizon defined by the elevation cut-off angle. Horizon dip and yellow-light refraction (Earth only) are considered. Accuracy is < or = to twice the requested search step-size. 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) dRA*cosD d(DEC)/dt = The rate of change of target center apparent RA and DEC (airless). d(RA)/dt is multiplied by the cosine of the declination. Units: ARCSECONDS PER HOUR APmag S-brt = Asteroid's approximate apparent visual magnitude & surface brightness: 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 errors could be large and unknown. Units: NONE & VISUAL MAGNITUDES PER SQUARE ARCSECOND 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 *******************************************************************************