2009FD小行星近地点预报
本帖最后由 suhuasky 于 2009-3-26 00:57 编辑小行星：2009FD
计算地点:新疆乌鲁木齐星明天文台
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. Current SettingsEphemeris Type [change] : OBSERVERTarget Body [change] : Asteroid (2009 FD)Observer Location [change] : user defined ( 87°10'39.6''E, 43°28'15.0''N, 2080 m ) Time Span [change] : Start=2009-03-27, Stop=2009-03-28, Step=1 hTable Settings [change] : defaultsDisplay/Output [change] : default (formatted HTML)Object Data PageJPL/HORIZONS (2009 FD) 2009-Mar-25 09:50:34Rec #:638646 (+COV) Soln.date: 2009-Mar-25_00:50:14 # obs: 146 (29 days) FK5/J2000.0 helio. ecliptic osc. elements (AU, DAYS, DEG, period=Julian yrs): EPOCH=2454910.5 ! 2009-Mar-20.00 (CT) Residual RMS= .41744 EC= .4935406750961884QR= .5923308026221817TP= 2454976.74299611 OM= 9.712864535137053W= 280.6940015311131 IN= 3.05052191712165 A= 1.169552565222645 MA= 308.3804252885625ADIST= 1.746774327823108 PER= 1.26485 N= .779245773 ANGMOM= .016179762 DAN= .81045 DDN= .9738599999999999 L= 290.4216903 B= -2.9974923 TP= 2009-May-25.2429961 Physical parameters (KM, SEC, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 22.19 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ASTEROID comments: 1: soln ref.= JPL#7, OCC=62: source=ORBResults*******************************************************************************Ephemeris / WWW_USER Wed Mar 25 09:50:35 2009Pasadena, USA / Horizons *******************************************************************************Target body name: (2009 FD) {source: JPL#7}Center body name: Earth (399) {source: DE405}Center-site name: (user defined site below)*******************************************************************************Start time : A.D. 2009-Mar-27 00:00:00.0000 UT Stoptime : A.D. 2009-Mar-28 00:00:00.0000 UT Step-size : 60 minutes*******************************************************************************Target pole/equ : No model availableTarget radii : (unavailable) Center geodetic : 87.1776667,43.4708811,2.0795109 {E-lon(deg),Lat(deg),Alt(km)}Center cylindric: 87.1776667,4637.63184,4367.0416 {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 : HMSTime format : CAL EOP file : eop.090324.p090615 EOP coverage : DATA-BASED 1962-JAN-20 TO 2009-MAR-24. PREDICTS-> 2009-JUN-14Units 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=2454910.5 ! 2009-Mar-20.00 (CT) Residual RMS= .41744 EC= .4935406750961884QR= .5923308026221817TP= 2454976.74299611 OM= 9.712864535137053W= 280.6940015311131 IN= 3.05052191712165 Asteroid physical parameters (KM, SEC, rotational period in hours): GM= n.a. RAD= n.a. ROTPER= n.a. H= 22.19 G= .150 B-V= n.a. ALBEDO= n.a. STYP= n.a. ::070821_17.jpg::一点也看不懂！ 苏老师威武！
能给个经天图就更威武了…… 只能看懂最后一张图::070821_17.jpg:: 苏，贴个图上来呀，那目标在高兴的图中很亮的哦。 我的QQ空间有
不过这里把我做的动画贴上来
原始照片由星明天文台拍摄
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