The following information shows the result of the orbit fit based on Gary Bernstein's method. Most of the information should be self-explanatory. Take special note that while the original Bernstein software works with barycentric coordinates, we convert these results into a heliocentric coordinate system.
# Object: 09JU18 # Created Wed Nov 27 02:08:58 2024 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 10.91d # First observation: 2009/05/14 # Last observation: 2009/05/25 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.024789 -0.000001 -0.009912 0.024462 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 1.90 DOF: 19 RMS: 0.07 # Min/Max residuals: -0.16 0.12 # Exact a, adot, b, bdot, g, gdot: 1.537550E-05 2.362259E-02 -7.434930E-06 -1.045400E-02 2.415216E-02 1.368395E-03 # Covariance matrix: 1.1915E-12 9.9499E-10 2.2352E-13 4.0506E-10 3.1807E-10 -1.7702E-09 9.9499E-10 1.0629E-06 2.3412E-10 4.2863E-07 3.3560E-07 -2.9641E-06 2.2352E-13 2.3412E-10 2.8979E-13 8.4112E-11 7.4258E-11 -5.2580E-11 4.0506E-10 4.2863E-07 8.4112E-11 1.7397E-07 1.3536E-07 -1.3681E-06 3.1807E-10 3.3560E-07 7.4258E-11 1.3536E-07 1.0611E-07 -7.9025E-07 -1.7702E-09 -2.9641E-06 -5.2580E-11 -1.3681E-06 -7.9025E-07 3.2402E-04 # lat0 lon0 xBary yBary zBary JD0 13.801238 178.430145 -0.825165 0.138562 -0.564172 2454965.850997 # Heliocentric elements and errors Epoch: 2454960.5000 = 2009/05/09 Mean Anomaly: 13.75717 +/- 119.964 Argument of Peri: 127.18546 +/- 200.433 Long of Asc Node: 27.25474 +/- 2.010 Inclination: 27.54426 +/- 1.565 Eccentricity: 0.22681008 +/- 0.2854 Semi-Major Axis: 53.54089269 +/- 5.7945 Time of Perihelion: 2449492.1851 +/- 47675.9 Perihelion: 41.39727872 +/- 15.9229 Aphelion: 65.68450666 +/- 16.8523 Period (y) 391.7749 +/- 63.60 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -40.79428895 +/- 0.5421 Ecliptic Y 0.28791836 +/- 0.0149 Ecliptic Z 9.87688694 +/- 0.1332 Ecliptic XDOT -0.00050157 +/- 0.0020 Ecliptic YDOT -0.00266093 +/- 0.0001 Ecliptic ZDOT -0.00111393 +/- 0.0005 # Distances at JD0 (AU) Heliocenter to KBO 41.97391814 +/- 0.5278 Geocenter to KBO 41.40416077 +/- 0.5584 # Hcoef: 8.40
The following table shows the complete astrometric record for 09JU18. The first three columns show the date of observation. The next six columns are RA and DEC. The next column (when provided) is the observed magnitude and filter. The next column is the object name (09JU18) followed by the observatory code and reference code for the source of the astrometry.
2009 05 14.350231 12 16 36.638 +13 15 53.36 24.9i 09JU18 568 C~0aRU 2009 05 14.394733 12 16 36.506 +13 15 53.03 24.0i 09JU18 568 C~0aRU 2009 05 14.433702 12 16 36.382 +13 15 52.76 24.0i 09JU18 568 C~0aRU 2009 05 15.253695 12 16 34.073 +13 15 47.90 25.1g 09JU18 568 C~0aRU 2009 05 15.388414 12 16 33.681 +13 15 46.95 24.7i 09JU18 568 C~0aRU 2009 05 15.426815 12 16 33.562 +13 15 46.65 24.1i 09JU18 568 C~0aRU 2009 05 17.362858 12 16 28.274 +13 15 33.36 09JU18 568 C~0aRU 2009 05 22.258817 12 16 16.132 +13 14 47.85 25.2g 09JU18 568 C~0aRU 2009 05 22.315486 12 16 16.001 +13 14 47.19 25.4g 09JU18 568 C~0aRU 2009 05 24.280205 12 16 11.649 +13 14 24.54 24.9g 09JU18 568 C~0aRU 2009 05 24.337723 12 16 11.520 +13 14 23.91 25.6g 09JU18 568 C~0aRU 2009 05 25.263983 12 16 09.585 +13 14 12.31 09JU18 568 C~0aRU
The following table shows the residuals to the orbit fit. The first coumn is the point number. The second column is the time, in years, measured from the first observation. The third and fifth columns are the regularized positions used in the orbit fit. The fourth and sixth columns are the residuals, in arc seconds, for RA and Dec respectively.
1 0.0000 0.00 0.02 0.00 0.12
2 0.0001 -1.62 0.04 -1.09 0.05
3 0.0002 -3.17 -0.07 -2.07 -0.04
4 0.0025 -31.95 0.05 -20.28 0.04
5 0.0028 -36.79 0.06 -23.49 -0.06
6 0.0029 -38.25 -0.03 -24.47 -0.16
7 0.0082 -103.29 -0.12 -68.13 0.08
8 0.0217 -246.54 0.00 -182.06 -0.06
9 0.0218 -248.02 0.07 -183.45 -0.08
10 0.0272 -296.78 0.02 -230.06 -0.02
11 0.0273 -298.24 -0.03 -231.40 0.04
12 0.0299 -319.30 -0.02 -253.53 0.08
The following table comes from a 10My integration of the orbit of the object. Three columns are shown. The first column is the result of integrating the nominal orbit. The other two columns are based on clones of the nominal orbit that are +/- 3 sigma from the nominal orbit. If all three types agree then the classificiation is deemed secure. The basis for these calculations is described in more detail in AJ, 129, 1117 (2005). Any use made of these calculations should refer to and credit this publication and the Deep Ecliptic Survey Team.
09JU18 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 libcent 0 -180.0 -180.0 -180.0 libamp 0 -180.0 -180.0 -180.0 libcent 1 -180.0 -180.0 -180.0 libamp 1 -180.0 -180.0 -180.0 libcent 2 -180.0 -180.0 -180.0 libamp 2 -180.0 -180.0 -180.0 libcent 3 -180.0 -180.0 -180.0 libamp 3 -180.0 -180.0 -180.0 libcent 4 -180.0 -180.0 -180.0 libamp 4 -180.0 -180.0 -180.0 kozaimean 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0