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: 15FP401 # Created Mon Jul 7 01:10:30 2025 # Orbit generated from Bernstein formalism # Fitting 16 observations of 16 # Arc: 65.82d # First observation: 2015/03/18 # Last observation: 2015/05/23 Preliminary a, adot, b, bdot, g, gdot: 0.000001 0.033283 0.000005 0.010663 0.027596 0.000000 # WARNING Fitting with energy constraint # Chi-squared of fit: 10.06 DOF: 27 RMS: 0.14 # Min/Max residuals: -0.33 0.24 # Exact a, adot, b, bdot, g, gdot: 1.620101E-05 2.485844E-02 7.083168E-06 1.099101E-02 2.626472E-02 1.016991E-03 # Covariance matrix: 7.2652E-13 4.3930E-10 2.0938E-13 -1.6224E-11 7.1354E-11 -3.7973E-09 4.3930E-10 8.9030E-07 4.7645E-10 -3.7138E-08 1.3585E-07 -9.6847E-06 2.0938E-13 4.7645E-10 4.3165E-13 -2.1132E-11 7.2373E-11 -5.2611E-09 -1.6224E-11 -3.7138E-08 -2.1132E-11 1.5775E-09 -5.6402E-09 4.1039E-07 7.1354E-11 1.3585E-07 7.2373E-11 -5.6402E-09 2.0780E-08 -1.4654E-06 -3.7973E-09 -9.6847E-06 -5.2611E-09 4.1039E-07 -1.4654E-06 1.0831E-04 # lat0 lon0 xBary yBary zBary JD0 -1.847836 179.977780 0.044583 -0.031837 -0.990649 2457100.028318 # Heliocentric elements and errors Epoch: 2457100.5000 = 2015/03/19 Mean Anomaly: 27.82568 +/- 234.969 Argument of Peri: 323.32285 +/- 279.867 Long of Asc Node: 183.98631 +/- 0.162 Inclination: 23.86819 +/- 0.849 Eccentricity: 0.07549874 +/- 0.1762 Semi-Major Axis: 41.80120819 +/- 0.6087 Time of Perihelion: 2449470.4923 +/- 64430.1 Perihelion: 38.64526972 +/- 7.3873 Aphelion: 44.95714666 +/- 7.3948 Period (y) 270.2660 +/- 5.90 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -39.04836632 +/- 0.2089 Ecliptic Y 0.05954257 +/- 0.0001 Ecliptic Z -1.22741108 +/- 0.0068 Ecliptic XDOT -0.00014732 +/- 0.0011 Ecliptic YDOT -0.00259697 +/- 0.0001 Ecliptic ZDOT 0.00114178 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.06769759 +/- 0.2088 Geocenter to KBO 38.07389119 +/- 0.2090 # Hcoef: 8.32
The following table shows the complete astrometric record for 15FP401. 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 (15FP401) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.52754 11 56 58.65 -01 41 11.3 24.2r 15FP401 T09 C~8vFU 2015 03 18.55580 11 56 58.52 -01 41 10.3 24.1r 15FP401 T09 C~8vFU 2015 03 22.462744 11 56 40.179 -01 38 44.76 23.7i 15FP401 568 C~2TuK 2015 03 22.496335 11 56 40.020 -01 38 43.53 23.5i 15FP401 568 C~2TuK 2015 03 22.499139 11 56 40.001 -01 38 43.39 23.5i 15FP401 568 C~2TuK 2015 03 25.440098 11 56 26.214 -01 36 53.49 24.3g 15FP401 568 C~2TuK 2015 03 25.504579 11 56 25.909 -01 36 51.09 24.5g 15FP401 568 C~2TuK 2015 03 25.532520 11 56 25.774 -01 36 49.98 24.5g 15FP401 568 C~2TuK 2015 03 29.39858 11 56 07.77 -01 34 25.4 24.9y 15FP401 T09 C~8vFU 2015 03 29.40127 11 56 07.77 -01 34 25.4 24.5y 15FP401 T09 C~8vFU 2015 05 23.24931 11 53 01.59 -01 06 33.3 24.5z 15FP401 T09 C~8vFU 2015 05 23.27125 11 53 01.55 -01 06 32.6 23.9z 15FP401 T09 C~8vFU 2015 05 23.28882 11 53 01.53 -01 06 32.6 23.8z 15FP401 T09 C~8vFU 2015 05 23.32981 11 53 01.44 -01 06 31.7 24.0z 15FP401 T09 C~8vFU 2015 05 23.34140 11 53 01.43 -01 06 31.4 24.2z 15FP401 T09 C~8vFU 2015 05 23.35010 11 53 01.42 -01 06 31.6 24.1z 15FP401 T09 C~8vFU
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 -0.25 0.00 -0.10
2 0.0001 -2.19 -0.17 0.14 -0.11
3 0.0108 -312.39 0.16 24.22 0.02
4 0.0109 -315.07 0.20 24.40 0.00
5 0.0109 -315.38 0.11 24.41 0.00
6 0.0189 -548.77 0.13 42.96 -0.01
7 0.0191 -553.92 0.16 43.34 -0.00
8 0.0192 -556.22 0.11 43.55 0.04
9 0.0298 -861.42 -0.33 68.74 0.10
10 0.0298 -861.42 -0.12 68.74 0.09
11 0.1799 -4088.82 0.11 490.88 0.01
12 0.1800 -4089.65 -0.06 491.28 0.24
13 0.1800 -4089.92 0.18 491.16 -0.02
14 0.1802 -4091.52 -0.20 491.45 -0.06
15 0.1802 -4091.78 -0.11 491.66 0.06
16 0.1802 -4091.83 0.09 491.42 -0.25
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.
15FP401 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