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: 09JV18 # Created Tue Apr 1 01:09:03 2025 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 10.91d # First observation: 2009/05/14 # Last observation: 2009/05/25 Preliminary a, adot, b, bdot, g, gdot: -0.000000 0.017805 0.000000 0.001378 0.020518 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 1.53 DOF: 17 RMS: 0.07 # Min/Max residuals: -0.13 0.11 # Exact a, adot, b, bdot, g, gdot: 1.322512E-05 1.697280E-02 1.063634E-06 1.037649E-03 2.029979E-02 -4.431675E-05 # Covariance matrix: 2.0167E-12 1.4702E-09 3.8421E-13 5.7839E-10 4.7142E-10 1.7935E-09 1.4702E-09 1.2977E-06 3.3727E-10 5.0528E-07 4.1240E-07 2.6158E-06 3.8421E-13 3.3727E-10 4.0989E-13 1.1780E-10 1.0705E-10 1.8786E-10 5.7839E-10 5.0528E-07 1.1780E-10 1.9787E-07 1.6071E-07 1.0692E-06 4.7142E-10 4.1240E-07 1.0705E-10 1.6071E-07 1.3109E-07 6.9001E-07 1.7935E-09 2.6158E-06 1.8786E-10 1.0692E-06 6.9001E-07 -3.3451E-04 # lat0 lon0 xBary yBary zBary JD0 13.353678 178.468816 -0.824775 0.134278 -0.565775 2454965.851269 # Heliocentric elements and errors Epoch: 2454960.5000 = 2009/05/09 Mean Anomaly: 173.63049 +/- 209.381 Argument of Peri: 261.23257 +/- 261.233 Long of Asc Node: 103.64671 +/- 5.261 Inclination: 13.59892 +/- 0.300 Eccentricity: 0.11796598 +/- 0.1180 Semi-Major Axis: 44.59656980 +/- 2.0823 Time of Perihelion: 2511275.3542 +/- 2782775.4 Perihelion: 39.33569156 +/- 5.5723 Aphelion: 49.85744804 +/- 5.7529 Period (y) 297.8245 +/- 20.86 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -48.51308691 +/- 0.8546 Ecliptic Y 0.46708035 +/- 0.0229 Ecliptic Z 11.37761331 +/- 0.2029 Ecliptic XDOT -0.00001808 +/- -0.0000 Ecliptic YDOT -0.00228533 +/- 0.0001 Ecliptic ZDOT 0.00013468 +/- 0.0001 # Distances at JD0 (AU) Heliocenter to KBO 49.83159490 +/- 0.8332 Geocenter to KBO 49.26158552 +/- 0.8786 # Hcoef: 8.19
The following table shows the complete astrometric record for 09JV18. 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 (09JV18) followed by the observatory code and reference code for the source of the astrometry.
2009 05 14.350503 12 16 00.085 +12 50 27.24 24.3i 09JV18 568 C~0aRU 2009 05 15.253695 12 15 57.991 +12 50 28.32 25.9g 09JV18 568 C~0aRU 2009 05 15.326414 12 15 57.819 +12 50 28.42 24.7i 09JV18 568 C~0aRU 2009 05 15.388414 12 15 57.684 +12 50 28.47 24.5i 09JV18 568 C~0aRU 2009 05 15.427086 12 15 57.577 +12 50 28.39 09JV18 568 C~0aRU 2009 05 22.258545 12 15 43.386 +12 50 20.93 26.3g 09JV18 568 C~0aRU 2009 05 22.315486 12 15 43.272 +12 50 20.60 09JV18 568 C~0aRU 2009 05 22.371056 12 15 43.163 +12 50 20.37 25.9g 09JV18 568 C~0aRU 2009 05 24.280205 12 15 39.740 +12 50 13.64 25.6g 09JV18 568 C~0aRU 2009 05 24.337723 12 15 39.637 +12 50 13.47 26.0g 09JV18 568 C~0aRU 2009 05 25.263983 12 15 38.076 +12 50 09.25 09JV18 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 -0.00 0.00 -0.05
2 0.0025 -28.40 -0.02 -11.50 0.00
3 0.0027 -30.74 -0.03 -12.44 0.04
4 0.0028 -32.56 0.11 -13.20 0.11
5 0.0029 -33.96 -0.06 -13.91 -0.08
6 0.0217 -220.43 0.01 -105.33 0.10
7 0.0218 -221.82 0.03 -106.31 -0.06
8 0.0220 -223.18 0.02 -107.17 -0.13
9 0.0272 -266.15 -0.05 -133.72 0.00
10 0.0273 -267.46 -0.07 -134.49 0.07
11 0.0299 -286.59 0.07 -147.65 -0.00
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.
09JV18 quality flag:1 Type: CLASSICAL SCATNEAR 5:3EE axisobj 44.521 60.711 42.126 ecceobj 0.121 0.346 0.325 incobj 13.586 14.716 13.210 qmin 38.871 39.065 28.292 qmax 50.928 84.498 57.303 amean 44.737 61.228 42.326 amin 44.375 60.554 41.750 amax 45.132 62.143 43.008 emean 0.115 0.348 0.319 emin 0.101 0.336 0.306 emax 0.129 0.361 0.332 imean 11.938 13.253 11.627 imin 11.452 12.853 11.205 imax 12.456 13.684 12.417 excite_mean 0.237 0.417 0.377 fracstop 1.000 1.000 1.000 cjmean 3.043 3.094 2.913 libcent 0 -180.0 -180.0 180.1 libamp 0 -180.0 -180.0 133.5 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 178.8 194.4 178.1 kozaiamp 179.9 180.0 180.0