2012 QG42

Object Data Page

Results

******************************************************************************* Ephemeris / WWW_USER Sat Oct 13 05:36:53 2012 Pasadena, USA / Horizons ******************************************************************************* Target body name: (2012 QG42) {source: JPL#34} Center body name: Earth (399) {source: DE405} Center-site name: GEOCENTRIC ******************************************************************************* Start time : A.D. 2012-Sep-14 05:00:00.0000 UT Stop time : A.D. 2012-Sep-14 05:30:00.0000 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.121012.p130103 EOP coverage : DATA-BASED 1962-JAN-20 TO 2012-OCT-12. PREDICTS-> 2013-JAN-02 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= 2456189.5 ! 2012-Sep-19.00 (CT) Residual RMS= .34692 EC= .3747283533941997 QR= .6415331007452428 TP= 2456254.845750337 OM= 344.9497363339614 W= 116.0855458818024 IN= 6.818636378093823 Asteroid physical parameters (KM, SEC, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 20.691 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 2012-Sep-14 05:00 18 56 32.78 +18 16 53.7 14.56 0.01909198349158 -0.0327457 109.5454 /T 69.4370 2012-Sep-14 05:01 18 56 29.53 +18 17 05.9 14.56 0.01909197087105 -0.0301893 109.5317 /T 69.4507 2012-Sep-14 05:02 18 56 26.29 +18 17 18.2 14.56 0.01909195927477 -0.0276328 109.5179 /T 69.4643 2012-Sep-14 05:03 18 56 23.04 +18 17 30.4 14.56 0.01909194870389 -0.0250763 109.5042 /T 69.4780 2012-Sep-14 05:04 18 56 19.79 +18 17 42.6 14.56 0.01909193915842 -0.0225199 109.4904 /T 69.4916 2012-Sep-14 05:05 18 56 16.54 +18 17 54.9 14.56 0.01909193063835 -0.0199634 109.4767 /T 69.5053 2012-Sep-14 05:06 18 56 13.29 +18 18 07.1 14.56 0.01909192314368 -0.0174069 109.4629 /T 69.5189 2012-Sep-14 05:07 18 56 10.04 +18 18 19.3 14.56 0.01909191667441 -0.0148505 109.4492 /T 69.5326 2012-Sep-14 05:08 18 56 06.79 +18 18 31.5 14.56 0.01909191123054 -0.0122941 109.4355 /T 69.5462 2012-Sep-14 05:09 18 56 03.54 +18 18 43.7 14.56 0.01909190681207 -0.0097376 109.4217 /T 69.5599 2012-Sep-14 05:10 18 56 00.29 +18 18 55.9 14.56 0.01909190341898 -0.0071812 109.4080 /T 69.5736 2012-Sep-14 05:11 18 55 57.04 +18 19 08.1 14.56 0.01909190105129 -0.0046247 109.3942 /T 69.5872 2012-Sep-14 05:12 18 55 53.79 +18 19 20.3 14.57 0.01909189970899 -0.0020683 109.3805 /T 69.6009 2012-Sep-14 05:13 18 55 50.54 +18 19 32.5 14.57 0.01909189939208 0.0004881 109.3667 /T 69.6145 2012-Sep-14 05:14 18 55 47.29 +18 19 44.7 14.57 0.01909190010054 0.0030445 109.3530 /T 69.6282 2012-Sep-14 05:15 18 55 44.04 +18 19 56.9 14.57 0.01909190183439 0.0056009 109.3393 /T 69.6418 2012-Sep-14 05:16 18 55 40.79 +18 20 09.1 14.57 0.01909190459361 0.0081573 109.3255 /T 69.6555 2012-Sep-14 05:17 18 55 37.54 +18 20 21.2 14.57 0.01909190837821 0.0107137 109.3118 /T 69.6691 2012-Sep-14 05:18 18 55 34.29 +18 20 33.4 14.57 0.01909191318818 0.0132701 109.2980 /T 69.6828 2012-Sep-14 05:19 18 55 31.04 +18 20 45.6 14.57 0.01909191902351 0.0158264 109.2843 /T 69.6964 2012-Sep-14 05:20 18 55 27.79 +18 20 57.8 14.57 0.01909192588421 0.0183828 109.2705 /T 69.7101 2012-Sep-14 05:21 18 55 24.54 +18 21 09.9 14.57 0.01909193377026 0.0209391 109.2568 /T 69.7237 2012-Sep-14 05:22 18 55 21.29 +18 21 22.1 14.57 0.01909194268167 0.0234955 109.2431 /T 69.7374 2012-Sep-14 05:23 18 55 18.04 +18 21 34.3 14.57 0.01909195261843 0.0260518 109.2293 /T 69.7510 2012-Sep-14 05:24 18 55 14.79 +18 21 46.4 14.57 0.01909196358054 0.0286081 109.2156 /T 69.7647 2012-Sep-14 05:25 18 55 11.54 +18 21 58.6 14.57 0.01909197556798 0.0311644 109.2018 /T 69.7783 2012-Sep-14 05:26 18 55 08.28 +18 22 10.7 14.57 0.01909198858077 0.0337207 109.1881 /T 69.7920 2012-Sep-14 05:27 18 55 05.03 +18 22 22.9 14.57 0.01909200261888 0.0362770 109.1743 /T 69.8057 2012-Sep-14 05:28 18 55 01.78 +18 22 35.0 14.57 0.01909201768232 0.0388332 109.1606 /T 69.8193 2012-Sep-14 05:29 18 54 58.53 +18 22 47.1 14.57 0.01909203377108 0.0413895 109.1468 /T 69.8330 2012-Sep-14 05:30 18 54 55.28 +18 22 59.3 14.57 0.01909205088515 0.0439457 109.1331 /T 69.8466 $$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. 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 *******************************************************************************************************