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: 15FJ561 # Created Mon Jun 30 01:10:23 2025 # Orbit generated from Bernstein formalism # Fitting 14 observations of 14 # Arc: 1.01y # First observation: 2014/03/25 # Last observation: 2015/03/29 Preliminary a, adot, b, bdot, g, gdot: -0.000019 0.038962 0.000003 -0.007349 0.031732 0.000000 # Chi-squared of fit: 5.25 DOF: 22 RMS: 0.11 # Min/Max residuals: -0.27 0.31 # Exact a, adot, b, bdot, g, gdot: 1.889599E-05 3.871117E-02 -3.857522E-06 -7.307279E-03 3.222214E-02 -5.421266E-03 # Covariance matrix: 7.6423E-13 3.5783E-11 -7.7808E-14 -6.8248E-12 2.3150E-11 9.3878E-10 3.5783E-11 2.6594E-09 -4.7371E-12 -5.0446E-10 1.5106E-09 6.9245E-08 -7.7808E-14 -4.7371E-12 1.9602E-13 7.1192E-13 -3.0958E-12 -1.2367E-10 -6.8248E-12 -5.0446E-10 7.1192E-13 9.6137E-11 -2.8661E-10 -1.3137E-08 2.3150E-11 1.5106E-09 -3.0958E-12 -2.8661E-10 9.3820E-10 3.9399E-08 9.3878E-10 6.9245E-08 -1.2367E-10 -1.3137E-08 3.9399E-08 1.8034E-06 # lat0 lon0 xBary yBary zBary JD0 14.848472 -144.592758 0.508286 0.219586 -0.827957 2456742.038278 # Heliocentric elements and errors Epoch: 2456740.5000 = 2014/03/24 Mean Anomaly: 335.92857 +/- 3.219 Argument of Peri: 167.33091 +/- 6.693 Long of Asc Node: 87.70672 +/- 0.050 Inclination: 17.83073 +/- 0.011 Eccentricity: 0.27065158 +/- 0.0267 Semi-Major Axis: 41.31117868 +/- 0.6441 Time of Perihelion: 2463225.3377 +/- 853.8 Perihelion: 30.13024270 +/- 1.1976 Aphelion: 52.49211467 +/- 1.3723 Period (y) 265.5275 +/- 6.21 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -25.44399869 +/- 0.0233 Ecliptic Y -17.46095277 +/- 0.0165 Ecliptic Z 7.95293752 +/- 0.0076 Ecliptic XDOT 0.00213334 +/- 0.0001 Ecliptic YDOT -0.00251827 +/- 0.0001 Ecliptic ZDOT -0.00071807 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 31.86739958 +/- 0.0207 Geocenter to KBO 31.03455769 +/- 0.0295 # Hcoef: 7.69
The following table shows the complete astrometric record for 15FJ561. 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 (15FJ561) followed by the observatory code and reference code for the source of the astrometry.
2014 03 25.53750 14 32 02.53 +00 42 26.9 22.7y 15FJ561 T09 C~8uZK 2014 03 25.56006 14 32 02.42 +00 42 27.6 22.6y 15FJ561 T09 C~8uZK 2014 03 28.56043 14 31 48.51 +00 44 13.1 22.4i 15FJ561 T09 C~8uZK 2014 03 28.59020 14 31 48.36 +00 44 14.1 22.5i 15FJ561 T09 C~8uZK 2014 03 28.60215 14 31 48.31 +00 44 14.6 22.5i 15FJ561 T09 C~8uZK 2014 03 28.61628 14 31 48.24 +00 44 14.9 22.6i 15FJ561 T09 C~8uZK 2014 03 28.62781 14 31 48.17 +00 44 15.3 22.6i 15FJ561 T09 C~8uZK 2014 03 28.63460 14 31 48.14 +00 44 15.6 22.7i 15FJ561 T09 C~8uZK 2015 03 22.53349 14 40 10.13 -00 26 45.4 22.6i 15FJ561 T09 C~8uZK 2015 03 22.53621 14 40 10.09 -00 26 45.4 22.6i 15FJ561 T09 C~8uZK 2015 03 22.57349 14 40 09.92 -00 26 44.0 22.5i 15FJ561 T09 C~8uZK 2015 03 29.49349 14 39 39.38 -00 22 47.8 22.1y 15FJ561 T09 C~8uZK 2015 03 29.49618 14 39 39.36 -00 22 47.8 22.2y 15FJ561 T09 C~8uZK 2015 03 29.56398 14 39 39.03 -00 22 45.3 22.3z 15FJ561 T09 C~8uZK
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 0.06
2 0.0001 -1.79 -0.03 0.13 -0.06
3 0.0083 -233.36 0.04 32.28 0.09
4 0.0084 -235.81 -0.02 32.50 0.02
5 0.0084 -236.68 0.06 32.73 0.14
6 0.0084 -237.77 0.10 32.67 -0.06
7 0.0085 -238.89 -0.10 32.71 -0.13
8 0.0085 -239.42 -0.08 32.85 -0.05
9 0.9911 8269.80 0.31 -1556.61 0.10
10 0.9911 8269.23 -0.06 -1556.80 -0.12
11 0.9912 8266.36 -0.27 -1556.30 -0.06
12 1.0101 7755.63 0.10 -1481.30 0.05
13 1.0102 7755.35 0.02 -1481.40 -0.07
14 1.0103 7749.85 -0.11 -1480.64 0.10
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.
15FJ561 quality flag:1 Type: 8:5EEE CENTAURR REMOVED axisobj 41.020 42.496 40.503 ecceobj 0.268 0.334 0.236 incobj 17.822 17.860 17.795 qmin 29.456 28.202 30.710 qmax 53.589 60.011 53.200 amean 41.189 42.657 40.992 amin 40.679 39.932 40.060 amax 41.771 44.457 42.250 emean 0.264 0.324 0.240 emin 0.238 0.273 0.221 emax 0.284 0.350 0.260 imean 16.313 16.901 16.384 imin 14.963 16.172 16.156 imax 17.467 17.972 16.655 excite_mean 0.385 0.436 0.371 fracstop 1.000 0.048 0.007 cjmean 2.896 2.856 2.905 libcent 0 182.1 -180.0 -180.0 libamp 0 142.1 -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 185.2 179.6 162.6 kozaiamp 180.0 5.1 11.5