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: 15FD400
# Created Sun Oct 19 01:10:47 2025
# Orbit generated from Bernstein formalism
# Fitting 13 observations of 13
# Arc: 7.04d
# First observation: 2015/03/18
# Last observation: 2015/03/25
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# Chi-squared of fit: 2.67 DOF: 22 RMS: 0.08
# Min/Max residuals: -0.22 0.20
# Exact a, adot, b, bdot, g, gdot:
1.479937E-05 2.035011E-02 -9.977222E-07 -1.363313E-03 2.193115E-02 0.000000E+00
# Covariance matrix:
2.6918E-11 3.6971E-08 -2.7338E-14 6.2336E-12 5.8677E-09 0.0000E+00
3.6971E-08 5.1136E-05 -3.7800E-11 8.6192E-09 8.1132E-06 0.0000E+00
-2.7338E-14 -3.7800E-11 1.7204E-13 -1.0889E-11 -5.9976E-12 0.0000E+00
6.2336E-12 8.6192E-09 -1.0889E-11 2.0083E-09 1.3676E-09 0.0000E+00
5.8677E-09 8.1132E-06 -5.9976E-12 1.3676E-09 1.2873E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.3881E-04
# lat0 lon0 xBary yBary zBary JD0
0.774455 179.543310 0.037740 0.013527 -0.991346 2457099.989744
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 1.15446 +/- 186.442
Argument of Peri: 167.53148 +/- 252.856
Long of Asc Node: 10.69564 +/- 3.841
Inclination: 3.89668 +/- 1.321
Eccentricity: 0.02540228 +/- 0.5581
Semi-Major Axis: 47.80584044 +/- 24.9518
Time of Perihelion: 2456703.3345 +/- 424720.0
Perihelion: 46.59146317 +/- 36.0986
Aphelion: 49.02021771 +/- 36.9645
Period (y) 330.5443 +/- 258.79
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -46.58586584 +/- 2.3586
Ecliptic Y 0.40880781 +/- 0.0190
Ecliptic Z 0.61628158 +/- 0.0319
Ecliptic XDOT -0.00002597 +/- 0.0015
Ecliptic YDOT -0.00254615 +/- 0.0008
Ecliptic ZDOT -0.00017009 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.59173557 +/- 2.3583
Geocenter to KBO 45.59724316 +/- 2.3589
# Hcoef: 8.33
The following table shows the complete astrometric record for 15FD400. 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 (15FD400) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.488966 11 59 33.378 +00 53 31.94 24.7r 15FD400 568 C~2TuJ 2015 03 18.491879 11 59 33.363 +00 53 32.00 24.6r 15FD400 568 C~2TuJ 2015 03 18.509963 11 59 33.289 +00 53 32.50 24.6r 15FD400 568 C~2TuJ 2015 03 18.518557 11 59 33.257 +00 53 32.67 24.6r 15FD400 568 C~2TuJ 2015 03 18.549212 11 59 33.129 +00 53 33.49 24.6r 15FD400 568 C~2TuJ 2015 03 18.575207 11 59 33.021 +00 53 34.19 24.7r 15FD400 568 C~2TuJ 2015 03 20.437180 11 59 25.409 +00 54 22.18 24.2i 15FD400 568 C~2TuJ 2015 03 20.440683 11 59 25.395 +00 54 22.34 24.3i 15FD400 568 C~2TuJ 2015 03 20.474493 11 59 25.249 +00 54 23.19 24.3i 15FD400 568 C~2TuJ 2015 03 20.554741 11 59 24.918 +00 54 25.28 24.3i 15FD400 568 C~2TuJ 2015 03 25.46627 11 59 04.83 +00 56 31.5 26.0g 15FD400 T09 C~90HW 2015 03 25.49565 11 59 04.69 +00 56 32.7 26.1g 15FD400 T09 C~90HW 2015 03 25.52597 11 59 04.57 +00 56 33.2 26.8g 15FD400 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 -0.03 0.00 0.00
2 0.0000 -0.23 -0.06 -0.03 -0.03
3 0.0001 -1.45 -0.05 -0.02 0.01
4 0.0001 -1.96 0.02 -0.05 -0.02
5 0.0002 -4.04 -0.00 -0.06 0.01
6 0.0002 -5.81 -0.02 -0.07 0.03
7 0.0053 -129.64 0.08 -1.45 -0.04
8 0.0053 -129.90 0.06 -1.39 0.03
9 0.0054 -132.25 0.01 -1.48 -0.02
10 0.0057 -137.63 0.04 -1.54 0.02
11 0.0191 -464.26 0.20 -5.58 -0.13
12 0.0192 -466.66 -0.22 -5.32 0.18
13 0.0193 -468.51 -0.03 -5.57 -0.04
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.
15FD400 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