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: 15FO552
# Created Mon Jun 30 01:10:23 2025
# Orbit generated from Bernstein formalism
# Fitting 14 observations of 14
# Arc: 10.85d
# First observation: 2015/03/18
# Last observation: 2015/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000001 0.033566 0.000000 -0.001892 0.029823 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# Chi-squared of fit: 5.53 DOF: 23 RMS: 0.11
# Min/Max residuals: -0.36 0.25
# Exact a, adot, b, bdot, g, gdot:
1.584243E-05 3.028004E-02 -5.828109E-07 -1.891599E-03 2.929639E-02 -8.234320E-03
# Covariance matrix:
3.6697E-11 6.5857E-08 -1.4721E-13 3.8335E-12 1.0481E-08 1.8564E-08
6.5857E-08 1.1936E-04 -2.6721E-10 7.2300E-09 1.8988E-05 2.8336E-05
-1.4721E-13 -2.6721E-10 3.2103E-13 -1.2763E-11 -4.2489E-11 -3.5471E-11
3.8335E-12 7.2300E-09 -1.2763E-11 7.5499E-10 1.1382E-09 -1.5590E-08
1.0481E-08 1.8988E-05 -4.2489E-11 1.1382E-09 3.0209E-06 4.7318E-06
1.8564E-08 2.8336E-05 -3.5471E-11 -1.5590E-08 4.7318E-06 3.3056E-04
# lat0 lon0 xBary yBary zBary JD0
1.078018 -178.690203 0.067957 0.018748 -0.989652 2457100.008498
# Heliocentric elements and errors
Epoch: 2457100.5000 = 2015/03/19
Mean Anomaly: 291.05990 +/- 90.741
Argument of Peri: 263.02372 +/- 117.318
Long of Asc Node: 17.50932 +/- 5.559
Inclination: 3.72520 +/- 1.239
Eccentricity: 0.26351638 +/- 0.5717
Semi-Major Axis: 36.12904514 +/- 18.9319
Time of Perihelion: 2472290.3175 +/- 16036.9
Perihelion: 26.60845006 +/- 24.9202
Aphelion: 45.64964023 +/- 31.6040
Period (y) 217.1665 +/- 170.70
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.11317308 +/- 2.0242
Ecliptic Y -0.73489736 +/- 0.0461
Ecliptic Z 0.64218932 +/- 0.0381
Ecliptic XDOT 0.00082713 +/- 0.0017
Ecliptic YDOT -0.00281730 +/- 0.0009
Ecliptic ZDOT -0.00019113 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.12673348 +/- 2.0234
Geocenter to KBO 34.13389475 +/- 2.0251
# Hcoef: 9.01
The following table shows the complete astrometric record for 15FO552. 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 (15FO552) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.50772 12 06 31.31 +00 28 05.3 24.4r 15FO552 T09 C~8uZ7 2015 03 18.55140 12 06 31.07 +00 28 07.0 24.1r 15FO552 T09 C~8uZ7 2015 03 18.57737 12 06 30.92 +00 28 07.8 23.9r 15FO552 T09 C~8uZ7 2015 03 18.57964 12 06 30.92 +00 28 07.9 24.4r 15FO552 T09 C~8uZ7 2015 03 25.47205 12 05 53.98 +00 32 00.3 25.1g 15FO552 T09 C~8uZ7 2015 03 25.48492 12 05 53.91 +00 32 00.8 25.0g 15FO552 T09 C~8uZ7 2015 03 25.52811 12 05 53.67 +00 32 02.1 25.0g 15FO552 T09 C~8uZ7 2015 03 25.55400 12 05 53.53 +00 32 03.0 24.9g 15FO552 T09 C~8uZ7 2015 03 25.55615 12 05 53.53 +00 32 03.0 25.1g 15FO552 T09 C~8uZ7 2015 03 29.26630 12 05 33.74 +00 34 07.1 23.8y 15FO552 T09 C~8uZ7 2015 03 29.27727 12 05 33.69 +00 34 07.4 24.1y 15FO552 T09 C~8uZ7 2015 03 29.29637 12 05 33.57 +00 34 08.1 23.7y 15FO552 T09 C~8uZ7 2015 03 29.32352 12 05 33.42 +00 34 08.8 24.1y 15FO552 T09 C~8uZ7 2015 03 29.35897 12 05 33.21 +00 34 10.3 24.2y 15FO552 T09 C~8uZ7
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 -0.09
2 0.0001 -3.98 -0.02 0.13 0.10
3 0.0002 -6.36 -0.12 -0.03 -0.02
4 0.0002 -6.40 0.04 0.06 0.07
5 0.0191 -607.20 -0.02 -7.05 0.00
6 0.0191 -608.37 -0.04 -7.01 0.07
7 0.0192 -612.19 -0.05 -7.25 -0.10
8 0.0193 -614.47 -0.05 -7.26 -0.07
9 0.0193 -614.47 0.14 -7.26 -0.06
10 0.0295 -936.18 0.10 -11.43 0.09
11 0.0295 -936.99 0.25 -11.45 0.09
12 0.0295 -938.92 -0.01 -11.53 0.05
13 0.0296 -941.26 0.02 -11.78 -0.16
14 0.0297 -944.75 -0.36 -11.66 0.03
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.
15FO552 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