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: 15FO477
# Created Tue Apr 1 01:10:22 2025
# Orbit generated from Bernstein formalism
# Fitting 20 observations of 20
# Arc: 4.19y
# First observation: 2015/01/25
# Last observation: 2019/04/05
Preliminary a, adot, b, bdot, g, gdot:
-0.000068 0.028910 -0.000012 0.004008 0.026643 0.000000
# Chi-squared of fit: 12.22 DOF: 34 RMS: 0.14
# Min/Max residuals: -0.37 0.24
# Exact a, adot, b, bdot, g, gdot:
1.749544E-05 2.831822E-02 3.701568E-06 3.914923E-03 2.639479E-02 -2.329845E-03
# Covariance matrix:
4.5429E-13 1.0011E-13 -7.7238E-15 2.4100E-14 3.7843E-13 1.4366E-12
1.0011E-13 8.5207E-13 -2.8735E-14 1.4321E-13 4.1713E-13 8.3217E-12
-7.7238E-15 -2.8735E-14 1.9260E-13 -5.3542E-14 -1.7732E-14 -2.8670E-13
2.4100E-14 1.4321E-13 -5.3542E-14 4.4248E-14 6.9847E-14 1.4319E-12
3.7843E-13 4.1713E-13 -1.7732E-14 6.9847E-14 6.0012E-13 4.1054E-12
1.4366E-12 8.3217E-12 -2.8670E-13 1.4319E-12 4.1054E-12 8.3199E-11
# lat0 lon0 xBary yBary zBary JD0
2.198463 176.757964 0.772122 0.023444 -0.606703 2457048.072631
# Heliocentric elements and errors
Epoch: 2457040.5000 = 2015/01/18
Mean Anomaly: 333.30670 +/- 0.061
Argument of Peri: 53.84016 +/- 0.096
Long of Asc Node: 160.40888 +/- 0.001
Inclination: 8.19905 +/- 0.000
Eccentricity: 0.18435778 +/- 0.0002
Semi-Major Axis: 45.60985104 +/- 0.0063
Time of Perihelion: 2465382.8080 +/- 18.9
Perihelion: 37.20132014 +/- 0.0111
Aphelion: 54.01838194 +/- 0.0123
Period (y) 308.0322 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -38.36326794 +/- 0.0011
Ecliptic Y 2.94632850 +/- 0.0001
Ecliptic Z 1.45348193 +/- 0.0000
Ecliptic XDOT 0.00008672 +/- 0.0000
Ecliptic YDOT -0.00295260 +/- 0.0000
Ecliptic ZDOT 0.00039661 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 38.50368539 +/- 0.0011
Geocenter to KBO 37.88625958 +/- 0.0011
# Hcoef: 7.90
The following table shows the complete astrometric record for 15FO477. 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 (15FO477) followed by the observatory code and reference code for the source of the astrometry.
2015 01 25.571853 11 51 35.90 +03 18 22.9 15FO477 T09 C~8AgS 2015 01 25.629150 11 51 35.75 +03 18 24.2 15FO477 T09 C~8AgS 2015 03 23.16519 11 47 46.39 +03 46 56.7 23.0R 15FO477 695 C~8AgS 2015 03 23.22929 11 47 46.07 +03 46 58.8 15FO477 695 C~8AgS 2015 03 23.28872 11 47 45.79 +03 47 00.7 15FO477 695 C~8AgS 2015 04 15.20534 11 46 03.00 +03 58 35.9 23.2R 15FO477 695 C~8AgS 2015 04 15.28229 11 46 02.68 +03 58 38.0 15FO477 695 C~8AgS 2015 04 15.35550 11 46 02.38 +03 58 39.9 15FO477 695 C~8AgS 2018 02 11.643203 12 09 55.84 +02 04 44.7 15FO477 T09 C~8AgS 2018 04 22.367255 12 04 48.45 +02 41 17.3 15FO477 T09 C~8AgS 2019 02 05.537827 12 16 42.81 +01 34 32.1 15FO477 T09 C~8AgS 2019 03 03.568727 12 15 06.97 +01 47 19.7 15FO477 T09 C~8AgS 2019 03 03.608930 12 15 06.79 +01 47 21.1 15FO477 T09 C~8AgS 2019 04 04.45934 12 12 37.09 +02 05 06.0 24.2g 15FO477 T09 C~8AgS 2019 04 04.48250 12 12 36.98 +02 05 06.6 24.0g 15FO477 T09 C~8AgS 2019 04 04.50140 12 12 36.89 +02 05 07.3 24.2g 15FO477 T09 C~8AgS 2019 04 04.51398 12 12 36.82 +02 05 07.6 24.3g 15FO477 T09 C~8AgS 2019 04 05.52240 12 12 32.09 +02 05 39.7 23.5r 15FO477 T09 C~8AgS 2019 04 05.54544 12 12 31.98 +02 05 40.6 23.9r 15FO477 T09 C~8AgS 2019 04 05.57686 12 12 31.84 +02 05 40.9 23.6r 15FO477 T09 C~8AgS
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 -0.11 0.00 -0.28
2 0.0002 -2.58 -0.18 0.30 -0.24
3 0.1549 -3834.57 0.20 207.45 0.20
4 0.1551 -3839.81 0.06 207.47 0.12
5 0.1553 -3844.41 0.18 207.56 0.11
6 0.2180 -5533.17 -0.07 235.63 0.06
7 0.2182 -5538.40 -0.09 235.66 0.08
8 0.2184 -5543.28 -0.03 235.63 0.04
9 3.0474 16911.50 0.13 2542.38 -0.20
10 3.2383 11786.78 0.02 2702.21 -0.11
11 4.0300 23288.80 0.07 3341.68 -0.03
12 4.1013 21645.08 0.02 3466.10 0.04
13 4.1014 21642.01 -0.02 3466.30 0.11
14 4.1886 19134.45 -0.06 3537.81 0.13
15 4.1887 19132.69 0.01 3537.69 0.01
16 4.1887 19131.16 -0.02 3537.79 0.10
17 4.1888 19130.06 -0.12 3537.64 -0.05
18 4.1915 19051.56 -0.09 3538.50 0.05
19 4.1916 19049.67 -0.16 3538.66 0.21
20 4.1917 19047.61 0.24 3538.08 -0.37
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.
15FO477 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.160 45.176 45.145 ecceobj 0.177 0.177 0.177 incobj 8.231 8.231 8.231 qmin 36.660 36.665 36.663 qmax 54.536 54.488 54.392 amean 45.382 45.399 45.365 amin 44.990 45.003 44.969 amax 45.838 45.863 45.818 emean 0.173 0.173 0.172 emin 0.156 0.157 0.156 emax 0.190 0.189 0.189 imean 7.625 7.615 7.632 imin 6.700 6.679 6.716 imax 8.555 8.547 8.560 excite_mean 0.218 0.218 0.218 fracstop 1.000 1.000 1.000 cjmean 3.060 3.061 3.060 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 181.4 180.3 181.6 kozaiamp 180.0 180.0 180.0