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Old 28-08-2019, 01:00 PM
mattsss (Matt)
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Join Date: Aug 2019
Location: Sydney
Posts: 1
Asteroid flyby of earth mid sept (467317) 2000 QW7

Is anyone going to take a look at 2000 QW7?

i've figured out how to get coordinates out of NASA horizons (which is new to me). I've put in the observer coordinates for Sydney in this table.

Code:
*******************************************************************************
Ephemeris / WWW_USER Wed Aug 28 04:14:38 2019 Pasadena, USA      / Horizons    
*******************************************************************************
Target body name: 467317 (2000 QW7)               {source: JPL#69}
Center body name: Earth (399)                     {source: DE431}
Center-site name: (user defined site below)
*******************************************************************************
Start time      : A.D. 2019-Aug-28 22:00:00.0000 UT+10:00
Stop  time      : A.D. 2019-Sep-27 00:00:00.0000 UT+10:00
Step-size       : 1440 minutes
*******************************************************************************
Target pole/equ : No model available
Target radii    : (unavailable)                                                
Center geodetic : 151.283300,-33.916600,0.0000000 {E-lon(deg),Lat(deg),Alt(km)}
Center cylindric: 151.283300,5298.42577,-3538.773 {E-lon(deg),Dxy(km),Dz(km)}
Center pole/equ : High-precision EOP model        {East-longitude positive}
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 
Time zone       : UT+10:00
EOP file        : eop.190827.p191118                                           
EOP coverage    : DATA-BASED 1962-JAN-20 TO 2019-AUG-27. PREDICTS-> 2019-NOV-17
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=  2453156.5 ! 2004-May-31.00 (TDB)         Residual RMS= .53772        
   EC= .4682209180293452   QR= 1.035143601444068   TP= 2452788.5371858575      
   OM= 158.7587215756693   W=  190.50326595108     IN= 4.163174711909118       
  Equivalent ICRF heliocentric equatorial cartesian coordinates (au, au/d):
   X=-2.343972991123425E+00  Y= 1.274655964706891E+00  Z= 5.182812870681679E-01
  VX=-5.843329979309824E-03 VY=-5.344850025927571E-03 VZ=-1.735651301057133E-03
Asteroid physical parameters (km, seconds, rotational period in hours):        
   GM= n.a.                RAD= n.a.               ROTPER= 71.3                
   H= 19.8                 G= .150                 B-V= n.a.                   
                           ALBEDO= n.a.            STYP= n.a.                  
*******************************************************************************************************
 Date_(ZONE)_HR:MN     R.A._(ICRF/J2000.0)_DEC  APmag            delta      deldot    S-O-T /r    S-T-O
*******************************************************************************************************
$$SOE
 2019-Aug-28 22:00     18 31 10.80 -15 34 33.7  16.22 0.07362090445541  -5.2909888 122.6160 /T  54.0026
 2019-Aug-29 22:00     18 35 28.40 -16 22 49.8  16.12 0.07047730582875  -5.2264763 122.7109 /T  54.0496
 2019-Aug-30 22:00     18 40 18.31 -17 15 13.0  16.02 0.06737473916724  -5.1519185 122.9138 /T  53.9911
 2019-Aug-31 22:00     18 45 45.27 -18 12 06.6  15.91 0.06432009196470  -5.0653093 123.2370 /T  53.8142
 2019-Sep-01 22:00     18 51 54.91 -19 13 54.2  15.79 0.06132161893985  -4.9641643 123.6945 /T  53.5047
 2019-Sep-02 22:00     18 58 53.90 -20 20 59.2  15.67 0.05838925635449  -4.8454374 124.3013 /T  53.0471
 2019-Sep-03 22:00     19 06 50.13 -21 33 42.7  15.54 0.05553498176387  -4.7054537 125.0734 /T  52.4248
 2019-Sep-04 22:00  m  19 15 52.97 -22 52 20.0  15.40 0.05277320777564  -4.5398645 126.0272 /T  51.6207
 2019-Sep-05 22:00  m  19 26 13.39 -24 16 56.2  15.26 0.05012119481991  -4.3436311 127.1784 /T  50.6185
 2019-Sep-06 22:00  m  19 38 04.09 -25 47 18.4  15.11 0.04759945620134  -4.1110695 128.5401 /T  49.4040
 2019-Sep-07 22:00  m  19 51 39.41 -27 22 45.9  14.96 0.04523210278038  -3.8360099 130.1200 /T  47.9684
 2019-Sep-08 22:00  m  20 07 14.77 -29 01 57.0  14.81 0.04304703216425  -3.5121544 131.9162 /T  46.3122
 2019-Sep-09 22:00  m  20 25 05.54 -30 42 32.9  14.65 0.04107581156610  -3.1337328 133.9108 /T  44.4517
 2019-Sep-10 22:00  m  20 45 24.69 -32 21 04.0  14.50 0.03935304840018  -2.6965302 136.0625 /T  42.4258
 2019-Sep-11 22:00  m  21 08 19.15 -33 52 43.0  14.36 0.03791502064721  -2.1992755 138.2989 /T  40.3042
 2019-Sep-12 22:00  m  21 33 44.90 -35 11 36.3  14.24 0.03679740388181  -1.6451779 140.5114 /T  38.1925
 2019-Sep-13 22:00  m  22 01 21.91 -36 11 23.9  14.14 0.03603213965149  -1.0431417 142.5574 /T  36.2292
 2019-Sep-14 22:00  m  22 30 31.49 -36 46 29.1  14.06 0.03564384287143  -0.4080031 144.2773 /T  34.5702
 2019-Sep-15 22:00  m  23 00 18.87 -36 53 19.8  14.03 0.03564652241830   0.2407334 145.5259 /T  33.3571
 2019-Sep-16 22:00  m  23 29 41.91 -36 31 29.6  14.04 0.03604154719607   0.8816111 146.2133 /T  32.6776
 2019-Sep-17 22:00  m  23 57 43.17 -35 43 44.1  14.08 0.03681752586073   1.4946013 146.3331 /L  32.5381
 2019-Sep-18 22:00  m  00 23 39.77 -34 35 11.2  14.16 0.03795213920671   2.0639779 145.9613 /L  32.8646
 2019-Sep-19 22:00     00 47 07.48 -33 12 00.7  14.26 0.03941531336040   2.5798135 145.2259 /L  33.5328
 2019-Sep-20 22:00     01 07 58.98 -31 40 10.8  14.38 0.04117281046048   3.0379507 144.2674 /L  34.4060
 2019-Sep-21 22:00     01 26 19.16 -30 04 41.9  14.51 0.04318943231939   3.4389099 143.2101 /L  35.3642
 2019-Sep-22 22:00     01 42 20.03 -28 29 19.2  14.65 0.04543139623214   3.7863871 142.1486 /L  36.3163
 2019-Sep-23 22:00     01 56 16.67 -26 56 35.9  14.79 0.04786780353704   4.0858395 141.1474 /L  37.2009
 2019-Sep-24 22:00     02 08 24.69 -25 28 06.3  14.93 0.05047134477125   4.3434027 140.2458 /L  37.9812
 2019-Sep-25 22:00     02 18 58.81 -24 04 40.8  15.07 0.05321846275365   4.5651734 139.4645 /L  38.6381
 2019-Sep-26 22:00     02 28 12.21 -22 46 39.0  15.20 0.05608918060194   4.7567961 138.8116 /L  39.1650
$$EOE
*******************************************************************************************************
my assumption is that i can plug those coordinates into a goto or stellarium and be fairly close to the mark at 10pm on the dates listed.
edit: Table updated with AEST offset and correct times

I doubt i'll see it optically on a celestron edge 8 at mag 14, i'll plan to capture a few long exposures and diff them to see if i can spot it moving.

Does anyone have any experience/suggestions?

I was going to put this in the beginner forum but after putting the table in i thought this really isn't a beginner topic

Last edited by mattsss; 28-08-2019 at 01:17 PM. Reason: utc offset correction
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