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: 09JX18 # Created Wed Nov 27 02:08:58 2024 # Orbit generated from Bernstein formalism # Fitting 8 observations of 8 # Arc: 10.92d # First observation: 2009/05/14 # Last observation: 2009/05/25 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.037815 -0.000000 -0.009153 0.034103 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 2.13 DOF: 11 RMS: 0.09 # Min/Max residuals: -0.22 0.24 # Exact a, adot, b, bdot, g, gdot: 1.667749E-05 3.578245E-02 -4.807247E-06 -1.003608E-02 3.357606E-02 -1.172563E-02 # Covariance matrix: 1.2947E-12 1.1589E-09 1.7561E-13 4.5141E-10 3.6254E-10 -4.0070E-09 1.1589E-09 1.7616E-06 2.5569E-10 6.7667E-07 5.3922E-07 -9.6978E-06 1.7561E-13 2.5569E-10 5.3771E-13 7.7647E-11 7.9208E-11 2.3315E-11 4.5141E-10 6.7667E-07 7.7647E-11 2.6167E-07 2.0694E-07 -4.2493E-06 3.6254E-10 5.3922E-07 7.9208E-11 2.0694E-07 1.6547E-07 -2.4723E-06 -4.0070E-09 -9.6978E-06 2.3315E-11 -4.2493E-06 -2.4723E-06 8.5705E-04 # lat0 lon0 xBary yBary zBary JD0 13.525581 179.246317 -0.816861 0.138563 -0.576131 2454965.856378 # Heliocentric elements and errors Epoch: 2454960.5000 = 2009/05/09 Mean Anomaly: 292.93187 +/- 85.454 Argument of Peri: 238.65678 +/- 35.967 Long of Asc Node: 39.51867 +/- 2.477 Inclination: 20.65980 +/- 1.018 Eccentricity: 0.27853221 +/- 0.7355 Semi-Major Axis: 31.45478387 +/- 15.4733 Time of Perihelion: 2466964.9482 +/- 12469.3 Perihelion: 22.69361336 +/- 25.6866 Aphelion: 40.21595438 +/- 30.4393 Period (y) 176.4161 +/- 130.17 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -29.55507689 +/- 0.3508 Ecliptic Y -0.43264992 +/- 0.0046 Ecliptic Z 6.96556350 +/- 0.0844 Ecliptic XDOT 0.00070474 +/- 0.0023 Ecliptic YDOT -0.00292321 +/- 0.0001 Ecliptic ZDOT -0.00101938 +/- 0.0005 # Distances at JD0 (AU) Heliocenter to KBO 30.36789144 +/- 0.3420 Geocenter to KBO 29.78312959 +/- 0.3608 # Hcoef: 9.70
The following table shows the complete astrometric record for 09JX18. 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 (09JX18) followed by the observatory code and reference code for the source of the astrometry.
2009 05 14.355612 12 19 07.250 +12 41 22.20 24.2i 09JX18 568 C~0aRU 2009 05 14.439089 12 19 06.900 +12 41 21.80 24.5i 09JX18 568 C~0aRU 2009 05 15.432224 12 19 03.130 +12 41 16.10 24.5i 09JX18 568 C~0aRU 2009 05 22.323191 12 18 39.480 +12 40 12.60 25.1g 09JX18 568 C~0aRU 2009 05 22.379034 12 18 39.300 +12 40 12.00 25.2g 09JX18 568 C~0aRU 2009 05 24.288213 12 18 33.660 +12 39 46.50 25.1g 09JX18 568 C~0aRU 2009 05 24.345698 12 18 33.490 +12 39 45.70 24.8g 09JX18 568 C~0aRU 2009 05 25.271680 12 18 30.900 +12 39 32.20 25.0g 09JX18 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 0.04 0.00 0.02
2 0.0002 -4.51 -0.22 -2.45 -0.05
3 0.0029 -52.57 0.24 -30.15 0.03
4 0.0218 -342.76 -0.03 -229.16 -0.03
5 0.0220 -344.92 -0.11 -230.78 0.05
6 0.0272 -409.92 0.05 -287.69 -0.03
7 0.0274 -411.87 0.05 -289.43 -0.01
8 0.0299 -440.99 -0.01 -317.20 0.02
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.
09JX18 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