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: 15FO400
# Created Sun Dec 22 02:10:18 2024
# Orbit generated from Bernstein formalism
# Fitting 21 observations of 21
# Arc: 1.22y
# First observation: 2015/03/18
# Last observation: 2016/06/04
Preliminary a, adot, b, bdot, g, gdot:
0.000002 0.025190 0.000000 0.000868 0.024978 0.000000
# Chi-squared of fit: 7.50 DOF: 36 RMS: 0.11
# Min/Max residuals: -0.33 0.27
# Exact a, adot, b, bdot, g, gdot:
1.587243E-05 2.512912E-02 4.810451E-07 8.684902E-04 2.483574E-02 -1.420322E-03
# Covariance matrix:
5.0856E-13 1.7723E-11 -4.3399E-15 6.5065E-13 1.7337E-11 6.9970E-10
1.7723E-11 1.2214E-09 -3.0007E-13 4.4244E-11 1.1813E-09 4.7552E-08
-4.3399E-15 -3.0007E-13 2.4316E-13 -2.3265E-13 -2.9122E-13 -1.1650E-11
6.5065E-13 4.4244E-11 -2.3265E-13 1.8879E-12 4.2798E-11 1.7232E-09
1.7337E-11 1.1813E-09 -2.9122E-13 4.2798E-11 1.1432E-09 4.5992E-08
6.9970E-10 4.7552E-08 -1.1650E-11 1.7232E-09 4.5992E-08 1.8523E-06
# lat0 lon0 xBary yBary zBary JD0
2.000430 -178.204241 0.076575 0.034656 -0.988591 2457099.995551
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 327.49270 +/- 20.424
Argument of Peri: 83.78851 +/- 26.279
Long of Asc Node: 137.04814 +/- 0.042
Inclination: 2.77742 +/- 0.002
Eccentricity: 0.09709917 +/- 0.0376
Semi-Major Axis: 44.78682369 +/- 0.4377
Time of Perihelion: 2466976.0801 +/- 6209.4
Perihelion: 40.43806017 +/- 1.7312
Aphelion: 49.13558720 +/- 1.7526
Period (y) 299.7323 +/- 4.39
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.21447376 +/- 0.0548
Ecliptic Y -1.21565784 +/- 0.0017
Ecliptic Z 1.40555207 +/- 0.0019
Ecliptic XDOT 0.00024313 +/- 0.0002
Ecliptic YDOT -0.00276959 +/- 0.0000
Ecliptic ZDOT 0.00009031 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.25634797 +/- 0.0547
Geocenter to KBO 40.26455949 +/- 0.0548
# Hcoef: 8.77
The following table shows the complete astrometric record for 15FO400. 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 (15FO400) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.494773 12 09 46.338 +01 07 16.67 24.7r 15FO400 568 C~2TuJ 2015 03 18.522848 12 09 46.208 +01 07 17.48 24.8r 15FO400 568 C~2TuJ 2015 03 18.579625 12 09 45.947 +01 07 19.25 24.6r 15FO400 568 C~2TuJ 2015 03 20.444244 12 09 37.542 +01 08 15.37 24.1i 15FO400 568 C~2TuJ 2015 03 20.483035 12 09 37.361 +01 08 16.55 24.3i 15FO400 568 C~2TuJ 2015 03 20.521711 12 09 37.185 +01 08 17.72 24.2i 15FO400 568 C~2TuJ 2016 04 02.39692 12 13 58.75 +00 43 17.0 24.5i 15FO400 T09 C~8H7Z 2016 04 02.43920 12 13 58.55 +00 43 18.2 24.6i 15FO400 T09 C~8H7Z 2016 04 02.49902 12 13 58.29 +00 43 20.0 24.4i 15FO400 T09 C~8H7Z 2016 04 02.52059 12 13 58.19 +00 43 20.3 24.4i 15FO400 T09 C~8H7Z 2016 04 04.35168 12 13 50.05 +00 44 13.3 25.6g 15FO400 T09 C~8H7Z 2016 04 04.36588 12 13 50.00 +00 44 13.8 26.5g 15FO400 T09 C~8H7Z 2016 04 04.39376 12 13 49.87 +00 44 14.4 26.4g 15FO400 T09 C~8H7Z 2016 04 04.41084 12 13 49.80 +00 44 14.9 26.1g 15FO400 T09 C~8H7Z 2016 04 08.50734 12 13 31.81 +00 46 10.7 24.9r 15FO400 T09 C~8H7Z 2016 04 08.51367 12 13 31.79 +00 46 10.7 24.7r 15FO400 T09 C~8H7Z 2016 04 08.52637 12 13 31.72 +00 46 11.0 25.2r 15FO400 T09 C~8H7Z 2016 06 04.25886 12 10 47.49 +01 02 22.4 24.2z 15FO400 T09 C~8H7Z 2016 06 04.29197 12 10 47.44 +01 02 22.4 24.5z 15FO400 T09 C~8H7Z 2016 06 04.30815 12 10 47.40 +01 02 22.6 24.4z 15FO400 T09 C~8H7Z 2016 06 04.32438 12 10 47.40 +01 02 22.4 24.2z 15FO400 T09 C~8H7Z
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 0.01
2 0.0001 -2.11 0.02 -0.03 -0.03
3 0.0002 -6.41 -0.02 0.04 0.02
4 0.0053 -144.38 0.01 1.40 -0.01
5 0.0054 -147.34 -0.03 1.41 -0.01
6 0.0055 -150.23 -0.01 1.43 0.00
7 1.0429 4046.48 -0.05 185.13 0.06
8 1.0430 4043.25 -0.14 185.03 -0.01
9 1.0431 4038.95 -0.01 185.13 0.13
10 1.0432 4037.46 0.09 184.81 -0.18
11 1.0482 3904.31 -0.16 184.85 -0.00
12 1.0482 3903.42 -0.00 185.01 0.17
13 1.0483 3901.39 0.02 184.78 -0.04
14 1.0484 3900.23 0.11 184.83 0.02
15 1.0596 3606.51 -0.01 183.69 0.09
16 1.0596 3606.23 0.17 183.57 -0.02
17 1.0596 3605.15 -0.01 183.43 -0.16
18 1.2150 958.51 0.27 94.74 0.18
19 1.2151 957.82 0.06 94.44 -0.02
20 1.2151 957.19 -0.33 94.38 -0.03
21 1.2151 957.27 -0.02 94.20 -0.17
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.
15FO400 quality flag:1 Type: 9:5EEEE SCATNEAR CLASSICAL axisobj 44.352 46.346 44.166 ecceobj 0.090 0.222 0.069 incobj 2.784 2.779 2.786 qmin 39.854 35.648 40.443 qmax 49.499 58.054 48.489 amean 44.554 46.551 44.372 amin 44.191 46.091 44.028 amax 44.945 47.086 44.742 emean 0.092 0.214 0.070 emin 0.082 0.197 0.054 emax 0.101 0.233 0.084 imean 2.069 2.569 1.996 imin 1.508 1.479 1.324 imax 2.733 3.602 2.684 excite_mean 0.099 0.219 0.078 fracstop 1.000 1.000 1.000 cjmean 3.096 3.073 3.099 libcent 0 182.4 -180.0 -180.0 libamp 0 108.8 -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 177.1 183.0 188.4 kozaiamp 179.9 180.0 180.0