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: 24FY26
# Created Mon Jul 7 01:12:09 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 15 observations of 15
# Arc: 8.13y
# First observation: 2017/03/16
# Last observation: 2025/05/02
# Chi-squared of fit: 11.02 DOF: 24 RMS: 0.15
# Min/Max residuals: -0.53 0.22
# Exact a, adot, b, bdot, g, gdot:
2.017596E-05 3.702969E-02 -4.677136E-07 1.309178E-03 2.896884E-02 -9.224418E-03
# Covariance matrix:
1.4617E-12 -3.9906E-13 5.2140E-16 -7.6662E-15 -2.2916E-13 -6.4807E-13
-3.9906E-13 4.8773E-13 -6.4089E-14 2.0929E-14 -2.8531E-13 1.5673E-12
5.2140E-16 -6.4089E-14 9.9727E-13 -1.3969E-13 8.1176E-14 -2.4024E-13
-7.6662E-15 2.0929E-14 -1.3969E-13 2.1664E-14 -1.7642E-14 7.3142E-14
-2.2916E-13 -2.8531E-13 8.1176E-14 -1.7642E-14 6.3524E-13 -1.2335E-12
-6.4807E-13 1.5673E-12 -2.4024E-13 7.3142E-14 -1.2335E-12 5.4247E-12
# lat0 lon0 xBary yBary zBary JD0
5.917800 156.756074 -0.314034 0.097190 -0.935905 2457828.628662
# Heliocentric elements and errors
Epoch: 2457828.5000 = 2017/03/16
Mean Anomaly: 352.21937 +/- 0.004
Argument of Peri: 108.09002 +/- 0.013
Long of Asc Node: 85.87622 +/- 0.002
Inclination: 6.07570 +/- 0.000
Eccentricity: 0.59774104 +/- 0.0001
Semi-Major Axis: 81.64819937 +/- 0.0260
Time of Perihelion: 2463652.6259 +/- 126.0
Perihelion: 32.84371953 +/- 0.0134
Aphelion: 130.45267921 +/- 0.0424
Period (y) 737.7821 +/- 0.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -32.54088962 +/- 0.0009
Ecliptic Y 13.62826091 +/- 0.0004
Ecliptic Z 3.55900677 +/- 0.0001
Ecliptic XDOT -0.00056926 +/- 0.0000
Ecliptic YDOT -0.00356949 +/- 0.0000
Ecliptic ZDOT 0.00003311 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.45867225 +/- 0.0008
Geocenter to KBO 34.52006223 +/- 0.0009
# Hcoef: 7.64
The following table shows the complete astrometric record for 24FY26. 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 (24FY26) followed by the observatory code and reference code for the source of the astrometry.
2017 03 16.127861 10 43 00.28 +14 31 16.4 24FY26 W84 C~8vOc 2021 11 07.586729 11 27 51.19 +09 54 25.2 24FY26 T09 C~8vOc 2021 11 07.615123 11 27 51.33 +09 54 25.0 24FY26 T09 C~8vOc 2021 11 07.643165 11 27 51.47 +09 54 24.5 24FY26 T09 C~8vOc 2024 03 16.28014 11 42 37.721 +08 41 27.97 22.8r 24FY26 W84 C~8vOc 2024 03 17.28170 11 42 32.404 +08 42 01.97 22.8r 24FY26 W84 C~8vOc 2024 04 12.09407 11 40 22.541 +08 54 30.74 22.9r 24FY26 269 C~8vOc 2024 04 12.17296 11 40 22.159 +08 54 32.57 22.9r 24FY26 269 C~8vOc 2024 05 04.13387 11 38 59.006 +09 00 33.24 22.8r 24FY26 269 C~8vOc 2024 05 04.18326 11 38 58.862 +09 00 33.77 22.9r 24FY26 269 C~8vOc 2025 04 29.18498 11 47 59.094 +08 04 06.87 24FY26 G37 C~8vOc 2025 04 30.23082 11 47 55.409 +08 04 21.53 24FY26 G37 C~8vOc 2025 04 30.29961 11 47 55.169 +08 04 22.57 24FY26 G37 C~8vOc 2025 05 02.05600 11 47 49.189 +08 04 45.48 24FY26 269 C~8vOc 2025 05 02.11377 11 47 48.991 +08 04 46.21 24FY26 269 C~8vOc
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 0.10 0.00 0.22
2 4.6474 0.00 -0.11 0.00 -0.53
3 4.6475 0.00 -0.15 0.00 -0.10
4 4.6475 0.00 -0.15 0.00 0.01
5 7.0011 0.00 0.10 0.00 -0.12
6 7.0038 0.00 0.10 0.00 0.08
7 7.0745 0.00 0.21 0.00 0.09
8 7.0747 0.00 -0.04 0.00 0.10
9 7.1349 0.00 0.07 0.00 0.04
10 7.1350 0.00 0.14 0.00 0.12
11 8.1206 0.00 0.03 0.00 0.01
12 8.1235 0.00 0.03 0.00 0.04
13 8.1237 0.00 0.10 0.00 0.15
14 8.1285 0.00 -0.19 0.00 -0.08
15 8.1286 0.00 -0.19 0.00 -0.07
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.
24FY26 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 80.027 80.026 80.028 ecceobj 0.589 0.589 0.589 incobj 6.067 6.067 6.067 qmin 31.977 31.988 31.930 qmax 139.649 178.142 167.694 amean 76.045 91.232 85.799 amin 67.679 78.727 76.374 amax 86.313 105.656 100.431 emean 0.568 0.637 0.614 emin 0.512 0.579 0.566 emax 0.618 0.690 0.671 imean 5.293 5.179 5.344 imin 4.485 4.141 4.338 imax 6.893 6.405 6.817 excite_mean 0.575 0.644 0.621 fracstop 1.000 1.000 1.000 cjmean 3.000 2.999 3.000 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 188.9 167.6 173.5 kozaiamp 180.0 180.0 179.9