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: 15AN304 # Created Sun Nov 24 02:10:11 2024 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 2.93y # First observation: 2015/01/09 # Last observation: 2017/12/14 Preliminary a, adot, b, bdot, g, gdot: 0.000015 0.029018 0.000028 -0.010907 0.025739 0.000000 # Chi-squared of fit: 5.70 DOF: 12 RMS: 0.14 # Min/Max residuals: -0.27 0.26 # Exact a, adot, b, bdot, g, gdot: 1.987471E-05 2.902289E-02 -7.392532E-06 -1.098470E-02 2.449673E-02 4.613276E-03 # Covariance matrix: 6.6002E-13 -7.1091E-13 -1.0261E-13 1.9276E-13 -2.5229E-13 -5.9059E-12 -7.1091E-13 3.7021E-12 1.1881E-13 -1.5754E-12 -8.3528E-13 4.2591E-11 -1.0261E-13 1.1881E-13 4.8501E-13 -2.7124E-13 1.6977E-13 1.4813E-12 1.9276E-13 -1.5754E-12 -2.7124E-13 9.0385E-13 4.2782E-13 -1.9112E-11 -2.5229E-13 -8.3528E-13 1.6977E-13 4.2782E-13 1.0400E-12 -9.9719E-12 -5.9059E-12 4.2591E-11 1.4813E-12 -1.9112E-11 -9.9719E-12 5.1700E-10 # lat0 lon0 xBary yBary zBary JD0 -25.355925 11.081527 -0.974340 0.051553 0.108322 2457031.569718 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 3.07082 +/- 0.014 Argument of Peri: 210.34209 +/- 0.085 Long of Asc Node: 143.20469 +/- 0.002 Inclination: 32.04792 +/- 0.001 Eccentricity: 0.69884893 +/- 0.0008 Semi-Major Axis: 130.54847034 +/- 0.2950 Time of Perihelion: 2452383.1298 +/- 14.7 Perihelion: 39.31481117 +/- 0.1323 Aphelion: 221.78212951 +/- 0.5106 Period (y) 1491.6464 +/- 5.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 35.89324838 +/- 0.0015 Ecliptic Y 8.02501230 +/- 0.0003 Ecliptic Z -17.48185791 +/- 0.0007 Ecliptic XDOT -0.00068609 +/- 0.0000 Ecliptic YDOT 0.00316645 +/- 0.0000 Ecliptic ZDOT -0.00133013 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 40.72273883 +/- 0.0014 Geocenter to KBO 40.82178211 +/- 0.0017 # Hcoef: 7.81
The following table shows the complete astrometric record for 15AN304. 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 (15AN304) followed by the observatory code and reference code for the source of the astrometry.
2015 01 09.06894 01 21 34.600 -18 53 37.22 24.2r 15AN304 W84 C~55Td 2015 01 12.07447 01 21 37.596 -18 51 35.09 24.4r 15AN304 W84 C~55Td 2015 10 07.21811 01 33 37.006 -18 51 34.13 24.2r 15AN304 W84 C~55Td 2015 10 18.24625 01 32 46.793 -18 57 14.92 23.5r 15AN304 W84 C~55Td 2015 11 05.18727 01 31 26.060 -19 03 11.80 23.8r 15AN304 W84 C~55Td 2016 10 05.26297 01 41 13.456 -18 41 44.14 23.1i 15AN304 W84 C~55Td 2016 11 05.26727 01 38 53.540 -18 54 32.32 24.0r 15AN304 W84 C~55Td 2016 12 05.17107 01 37 04.723 -18 54 05.14 23.6r 15AN304 W84 C~55Td 2017 12 14.13546 01 44 04.808 -18 42 05.45 24.3r 15AN304 W84 C~55Td
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 -0.24 0.00 0.06
2 0.0082 89.13 0.26 93.70 0.10
3 0.7424 9362.93 -0.05 -4201.40 0.17
4 0.7726 8571.43 0.03 -4204.51 -0.07
5 0.8217 7381.44 0.12 -4038.80 -0.27
6 1.7391 15488.41 -0.10 -6485.82 0.09
7 1.8240 13353.95 0.00 -6307.58 -0.17
8 1.9058 11967.86 -0.14 -5610.39 -0.05
9 2.9297 17682.89 0.12 -7582.55 0.13
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.
15AN304 quality flag:2 Type: SCATNEAR SCATNEAR9:1EEEEEEE axisobj 135.097 136.136 134.089 ecceobj 0.709 0.711 0.707 incobj 31.991 31.992 31.989 qmin 36.900 37.297 38.202 qmax 234.985 236.845 230.532 amean 131.546 132.677 130.277 amin 128.400 129.771 127.466 amax 136.582 137.762 135.005 emean 0.707 0.707 0.696 emin 0.692 0.696 0.683 emax 0.720 0.719 0.708 imean 29.925 30.236 30.968 imin 29.339 29.807 30.382 imax 31.061 31.084 31.680 excite_mean 0.865 0.868 0.866 fracstop 1.000 1.000 1.000 cjmean 2.792 2.791 2.793 libcent 0 -180.0 -180.0 81.2 libamp 0 -180.0 -180.0 60.9 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 245.1 239.5 224.5 kozaiamp 35.0 29.5 15.1