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: 15FE399
# Created Sun Oct 19 01:10:46 2025
# Orbit generated from Bernstein formalism
# Fitting 16 observations of 16
# Arc: 10.88d
# First observation: 2015/03/18
# Last observation: 2015/03/29
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 3.32 DOF: 28 RMS: 0.08
# Min/Max residuals: -0.15 0.24
# Exact a, adot, b, bdot, g, gdot:
1.569329E-05 2.251257E-02 2.231933E-07 2.027144E-04 2.299853E-02 0.000000E+00
# Covariance matrix:
2.5302E-11 3.6462E-08 -6.7651E-14 -4.2594E-12 5.7950E-09 0.0000E+00
3.6462E-08 5.3002E-05 -9.8316E-11 -6.1901E-09 8.4218E-06 0.0000E+00
-6.7651E-14 -9.8316E-11 2.0650E-13 -8.4143E-12 -1.5622E-11 0.0000E+00
-4.2594E-12 -6.1901E-09 -8.4143E-12 6.2070E-10 -9.8359E-10 0.0000E+00
5.7950E-09 8.4218E-06 -1.5622E-11 -9.8359E-10 1.3382E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.6007E-04
# lat0 lon0 xBary yBary zBary JD0
0.568295 -177.525325 0.088701 0.009930 -0.988130 2457099.972019
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 359.58076 +/- 348.889
Argument of Peri: 47.52682 +/- 54.817
Long of Asc Node: 135.30140 +/- 9.933
Inclination: 0.75902 +/- 0.123
Eccentricity: 0.08405760 +/- 0.5375
Semi-Major Axis: 48.55353329 +/- 26.1036
Time of Perihelion: 2457234.4098 +/- 119760.6
Perihelion: 44.47223985 +/- 35.3930
Aphelion: 52.63482674 +/- 38.4938
Period (y) 338.3292 +/- 272.84
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.43252620 +/- 2.1849
Ecliptic Y -1.83161952 +/- 0.0942
Ecliptic Z 0.43129023 +/- 0.0217
Ecliptic XDOT 0.00011254 +/- 0.0015
Ecliptic YDOT -0.00268326 +/- 0.0007
Ecliptic ZDOT 0.00002422 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.47235350 +/- 2.1830
Geocenter to KBO 43.48103065 +/- 2.1871
# Hcoef: 7.73
The following table shows the complete astrometric record for 15FE399. 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 (15FE399) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.471241 12 09 59.178 -00 27 45.46 24.0r 15FE399 568 C~2TuI 2015 03 18.503395 12 09 59.042 -00 27 44.60 24.1r 15FE399 568 C~2TuI 2015 03 18.533979 12 09 58.911 -00 27 43.81 24.0r 15FE399 568 C~2TuI 2015 03 18.562309 12 09 58.790 -00 27 42.95 24.0r 15FE399 568 C~2TuI 2015 03 20.416036 12 09 50.994 -00 26 51.88 23.6i 15FE399 568 C~2TuI 2015 03 20.455233 12 09 50.826 -00 26 50.76 23.5i 15FE399 568 C~2TuI 2015 03 20.494209 12 09 50.659 -00 26 49.68 23.6i 15FE399 568 C~2TuI 2015 03 20.535530 12 09 50.483 -00 26 48.57 23.7i 15FE399 568 C~2TuI 2015 03 25.44887 12 09 29.72 -00 24 32.7 25.3g 15FE399 T09 C~90HW 2015 03 25.48063 12 09 29.58 -00 24 32.1 25.6g 15FE399 T09 C~90HW 2015 03 25.51107 12 09 29.45 -00 24 31.2 25.5g 15FE399 T09 C~90HW 2015 03 29.27727 12 09 13.60 -00 22 47.8 23.7y 15FE399 T09 C~90HW 2015 03 29.29096 12 09 13.54 -00 22 47.6 23.3y 15FE399 T09 C~90HW 2015 03 29.31266 12 09 13.44 -00 22 46.9 23.5y 15FE399 T09 C~90HW 2015 03 29.33172 12 09 13.35 -00 22 46.4 23.7y 15FE399 T09 C~90HW 2015 03 29.35353 12 09 13.28 -00 22 45.7 23.6y 15FE399 T09 C~90HW
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 0.0001 -2.21 -0.01 -0.02 -0.03
3 0.0002 -4.33 0.01 -0.08 -0.08
4 0.0002 -6.34 -0.02 -0.01 -0.01
5 0.0053 -133.94 0.04 0.38 -0.01
6 0.0054 -136.70 0.03 0.41 0.03
7 0.0055 -139.42 0.04 0.40 0.03
8 0.0057 -142.29 0.07 0.37 0.01
9 0.0191 -482.07 -0.12 1.28 0.24
10 0.0192 -484.24 -0.06 0.99 -0.03
11 0.0193 -486.38 -0.07 1.04 0.03
12 0.0296 -745.64 0.06 1.44 0.05
13 0.0296 -746.55 0.11 1.26 -0.12
14 0.0297 -748.20 -0.04 1.31 -0.06
15 0.0297 -749.64 -0.15 1.23 -0.13
16 0.0298 -750.88 0.13 1.46 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.
15FE399 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