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: 15JF13 # Created Mon Jul 7 01:10:39 2025 # Orbit generated from Bernstein formalism # Fitting 20 observations of 20 # Arc: 1.14y # First observation: 2014/03/25 # Last observation: 2015/05/17 Preliminary a, adot, b, bdot, g, gdot: -0.000001 0.031932 0.000001 -0.008236 0.027512 0.000000 # Chi-squared of fit: 9.26 DOF: 34 RMS: 0.12 # Min/Max residuals: -0.35 0.22 # Exact a, adot, b, bdot, g, gdot: 2.003984E-05 3.197504E-02 -5.433808E-06 -8.235843E-03 2.759263E-02 1.060831E-03 # Covariance matrix: 2.7814E-13 4.9921E-12 6.2252E-16 -1.4898E-12 4.1300E-12 1.6571E-10 4.9921E-12 2.8385E-10 3.1685E-14 -8.1730E-11 2.2750E-10 9.0904E-09 6.2252E-16 3.1685E-14 1.8388E-13 -1.7786E-13 2.4170E-14 1.0534E-12 -1.4898E-12 -8.1730E-11 -1.7786E-13 2.3829E-11 -6.5496E-11 -2.6219E-09 4.1300E-12 2.2750E-10 2.4170E-14 -6.5496E-11 1.8277E-10 7.2844E-09 1.6571E-10 9.0904E-09 1.0534E-12 -2.6219E-09 7.2844E-09 2.9163E-07 # lat0 lon0 xBary yBary zBary JD0 13.502466 -146.149982 0.484585 0.203258 -0.846140 2456742.053778 # Heliocentric elements and errors Epoch: 2456740.5000 = 2014/03/24 Mean Anomaly: 2.28858 +/- 1.633 Argument of Peri: 131.41952 +/- 3.623 Long of Asc Node: 74.95449 +/- 0.015 Inclination: 19.34187 +/- 0.005 Eccentricity: 0.34755153 +/- 0.0019 Semi-Major Axis: 56.79297810 +/- 0.0578 Time of Perihelion: 2455746.6865 +/- 709.3 Perihelion: 37.05449176 +/- 0.1144 Aphelion: 76.53146444 +/- 0.1332 Period (y) 428.0063 +/- 0.65 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -30.26038069 +/- 0.0143 Ecliptic Y -19.71018916 +/- 0.0096 Ecliptic Z 8.46177800 +/- 0.0041 Ecliptic XDOT 0.00151819 +/- 0.0000 Ecliptic YDOT -0.00280138 +/- 0.0000 Ecliptic ZDOT -0.00076990 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.09156081 +/- 0.0128 Geocenter to KBO 36.24156607 +/- 0.0178 # Hcoef: 9.17
The following table shows the complete astrometric record for 15JF13. 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 (15JF13) followed by the observatory code and reference code for the source of the astrometry.
2014 03 25.55300 14 24 34.40 -00 04 12.8 25.1y 15JF13 T09 C~8uZN 2014 03 25.58356 14 24 34.28 -00 04 12.2 24.3y 15JF13 T09 C~8uZN 2014 03 25.61968 14 24 34.15 -00 04 11.0 25.4y 15JF13 T09 C~8uZN 2014 03 28.52423 14 24 22.12 -00 02 48.3 24.8i 15JF13 T09 C~8uZN 2014 03 28.54181 14 24 22.04 -00 02 48.0 24.8i 15JF13 T09 C~8uZN 2014 03 28.55746 14 24 21.98 -00 02 47.7 24.7i 15JF13 T09 C~8uZN 2014 03 28.57539 14 24 21.90 -00 02 47.0 24.8i 15JF13 T09 C~8uZN 2014 03 28.59923 14 24 21.79 -00 02 46.5 25.2i 15JF13 T09 C~8uZN 2015 03 22.55042 14 31 04.31 -01 08 43.6 24.2i 15JF13 T09 C~8uZN 2015 03 22.58468 14 31 04.19 -01 08 42.6 24.0i 15JF13 T09 C~8uZN 2015 03 22.59857 14 31 04.13 -01 08 42.1 24.4i 15JF13 T09 C~8uZN 2015 03 22.61243 14 31 04.07 -01 08 41.7 24.7i 15JF13 T09 C~8uZN 2015 05 15.412542 14 26 47.503 -00 48 15.63 24.9r 15JF13 568 C~2TuN 2015 05 15.431048 14 26 47.404 -00 48 15.19 24.7r 15JF13 568 C~2TuN 2015 05 15.435977 14 26 47.383 -00 48 15.18 24.6r 15JF13 568 C~2TuN 2015 05 15.446581 14 26 47.329 -00 48 15.04 24.4r 15JF13 568 C~2TuN 2015 05 15.463998 14 26 47.232 -00 48 14.96 24.6r 15JF13 568 C~2TuN 2015 05 17.351168 14 26 38.043 -00 47 51.09 25.2g 15JF13 568 C~2TuN 2015 05 17.367074 14 26 37.971 -00 47 50.69 25.3g 15JF13 568 C~2TuN 2015 05 17.369180 14 26 37.965 -00 47 50.79 25.2g 15JF13 568 C~2TuN
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 -0.35 0.00 0.15
2 0.0001 -1.90 -0.17 -0.03 -0.08
3 0.0002 -4.13 0.05 0.46 0.18
4 0.0081 -201.77 0.04 18.90 0.16
5 0.0082 -203.01 0.05 18.79 -0.05
6 0.0082 -203.95 0.21 18.78 -0.15
7 0.0083 -205.32 0.11 19.04 0.02
8 0.0083 -207.04 0.07 18.97 -0.18
9 0.9911 6801.07 -0.01 -1722.88 -0.21
10 0.9912 6799.04 0.13 -1722.53 -0.10
11 0.9912 6798.02 -0.00 -1722.36 -0.02
12 0.9913 6797.04 -0.10 -1722.28 -0.04
13 1.1386 2757.64 0.11 -1835.14 -0.06
14 1.1386 2756.10 -0.04 -1835.22 0.09
15 1.1386 2755.79 0.02 -1835.31 0.06
16 1.1387 2754.98 0.01 -1835.45 0.05
17 1.1387 2753.58 -0.08 -1835.85 -0.14
18 1.1439 2615.59 -0.06 -1858.84 -0.01
19 1.1439 2614.43 -0.04 -1858.82 0.22
20 1.1439 2614.38 0.07 -1858.94 0.12
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.
15JF13 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 56.187 56.946 55.859 ecceobj 0.340 0.356 0.334 incobj 19.341 19.323 19.358 qmin 36.043 35.782 36.173 qmax 78.239 79.942 77.497 amean 56.676 57.448 56.377 amin 56.018 56.789 55.774 amax 57.466 58.304 57.136 emean 0.346 0.358 0.341 emin 0.331 0.344 0.326 emax 0.362 0.375 0.357 imean 17.803 18.078 17.679 imin 17.155 17.540 16.985 imax 18.368 18.546 18.294 excite_mean 0.462 0.474 0.457 fracstop 1.000 1.000 1.000 cjmean 2.982 2.976 2.984 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 179.2 180.6 179.8 kozaiamp 180.0 179.9 179.9