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: 23FN61
# Created Mon Jul 7 01:12:06 2025
# Orbit generated from Bernstein formalism
# Fitting 4 observations of 4
# Arc: 57.69d
# First observation: 2023/03/21
# Last observation: 2023/05/18
Preliminary a, adot, b, bdot, g, gdot:
0.000000 0.023738 -0.000000 0.001572 0.021393 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 0.51 DOF: 3 RMS: 0.06
# Min/Max residuals: -0.11 0.11
# Exact a, adot, b, bdot, g, gdot:
1.395283E-05 1.789891E-02 9.196711E-07 1.439101E-03 2.044551E-02 -6.272078E-03
# Covariance matrix:
2.4274E-12 2.1696E-09 -6.7368E-15 4.9667E-11 3.5813E-10 -3.2450E-09
2.1696E-09 2.7888E-06 -8.5809E-12 6.3596E-08 4.5755E-07 -4.8196E-06
-6.7368E-15 -8.5809E-12 7.2953E-13 -4.9055E-12 -1.4323E-12 5.8031E-12
4.9667E-11 6.3596E-08 -4.9055E-12 1.5142E-09 1.0478E-08 -9.3853E-08
3.5813E-10 4.5755E-07 -1.4323E-12 1.0478E-08 7.5800E-08 -5.2080E-07
-3.2450E-09 -4.8196E-06 5.8031E-12 -9.3853E-08 -5.2080E-07 1.0833E-04
# lat0 lon0 xBary yBary zBary JD0
8.175486 -162.046074 0.305821 0.135910 -0.947649 2460024.917531
# Heliocentric elements and errors
Epoch: 2460020.5000 = 2023/03/17
Mean Anomaly: 303.59256 +/- 56.738
Argument of Peri: 156.43248 +/- 25.787
Long of Asc Node: 137.68491 +/- 1.809
Inclination: 9.24868 +/- 0.168
Eccentricity: 0.34663842 +/- 0.5594
Semi-Major Axis: 54.54056929 +/- 26.8800
Time of Perihelion: 2483072.6701 +/- 15723.2
Perihelion: 35.63471228 +/- 35.2037
Aphelion: 73.44642631 +/- 47.3406
Period (y) 402.7984 +/- 297.78
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -47.05176605 +/- 0.6202
Ecliptic Y -14.92775517 +/- 0.2009
Ecliptic Z 6.95540330 +/- 0.0937
Ecliptic XDOT 0.00155386 +/- 0.0013
Ecliptic YDOT -0.00200670 +/- 0.0004
Ecliptic ZDOT 0.00007129 +/- 0.0002
# Distances at JD0 (AU)
Heliocenter to KBO 49.85061883 +/- 0.5886
Geocenter to KBO 48.91050255 +/- 0.6586
# Hcoef: 7.30
The following table shows the complete astrometric record for 23FN61. 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 (23FN61) followed by the observatory code and reference code for the source of the astrometry.
2023 03 21.41673 13 18 39.622 +00 31 17.33 24.2r 23FN61 T09 C~8vOI 2023 03 21.61396 13 18 38.912 +00 31 22.39 24.3r 23FN61 T09 C~8vOI 2023 05 16.06380 13 15 17.446 +00 51 16.40 24.2r 23FN61 269 C~8vOI 2023 05 18.11047 13 15 11.279 +00 51 42.22 24.1r 23FN61 269 C~8vOI
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 0.04
2 0.0005 -11.77 0.02 0.65 -0.04
3 0.1524 -3260.94 0.03 -37.38 0.11
4 0.1580 -3356.35 -0.03 -48.46 -0.11
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.
23FN61 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