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: 15FC493
# Created Sun Feb 23 02:10:20 2025
# Orbit generated from Bernstein formalism
# Fitting 15 observations of 15
# Arc: 10.88d
# First observation: 2015/03/18
# Last observation: 2015/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.043917 0.000000 0.002486 0.027720 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after 14 iterations -- oscilliatory solution
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 7.69 DOF: 25 RMS: 0.13
# Min/Max residuals: -0.19 0.28
# Exact a, adot, b, bdot, g, gdot:
1.358664E-05 2.058995E-02 2.084673E-06 2.486106E-03 2.402119E-02 1.189426E-02
# Covariance matrix:
2.9196E-10 4.4998E-07 -6.2662E-13 -1.9466E-11 7.1207E-08 -4.6106E-07
4.4998E-07 6.9433E-04 -9.6623E-10 -3.0237E-08 1.0987E-04 -7.1404E-04
-6.2662E-13 -9.6623E-10 2.9122E-13 -1.2073E-11 -1.5291E-10 9.6836E-10
-1.9466E-11 -3.0237E-08 -1.2073E-11 7.6652E-10 -4.7794E-09 3.9228E-08
7.1207E-08 1.0987E-04 -1.5291E-10 -4.7794E-09 1.7385E-05 -1.1292E-04
-4.6106E-07 -7.1404E-04 9.6836E-10 3.9228E-08 -1.1292E-04 8.4075E-04
# lat0 lon0 xBary yBary zBary JD0
0.390058 -178.329944 0.074764 0.006863 -0.989308 2457099.974968
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 53.03015 +/- 57.725
Argument of Peri: 250.90087 +/- 145.228
Long of Asc Node: 178.40903 +/- 4.027
Inclination: 6.87928 +/- 8.665
Eccentricity: 0.50030045 +/- 1.3273
Semi-Major Axis: 46.06762118 +/- 23.5704
Time of Perihelion: 2440267.1508 +/- 12986.7
Perihelion: 23.01996979 +/- 62.2705
Aphelion: 69.11527256 +/- 70.6358
Period (y) 312.6813 +/- 239.97
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.60546042 +/- 7.2229
Ecliptic Y -1.16745911 +/- 0.2100
Ecliptic Z 0.28350868 +/- 0.0492
Ecliptic XDOT -0.00128815 +/- 0.0036
Ecliptic YDOT -0.00239100 +/- 0.0025
Ecliptic ZDOT 0.00029267 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 42.62239547 +/- 7.2200
Geocenter to KBO 41.62990977 +/- 7.2261
# Hcoef: 8.38
The following table shows the complete astrometric record for 15FC493. 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 (15FC493) followed by the observatory code and reference code for the source of the astrometry.
2015 03 18.47419 12 06 44.98 -00 18 22.8 24.5r 15FC493 T09 C~8eRm 2015 03 18.56444 12 06 44.58 -00 18 19.9 24.3r 15FC493 T09 C~8eRm 2015 03 20.41961 12 06 36.28 -00 17 23.0 24.0i 15FC493 T09 C~8eRm 2015 03 20.46072 12 06 36.09 -00 17 22.0 24.0i 15FC493 T09 C~8eRm 2015 03 20.49422 12 06 35.96 -00 17 20.6 24.1i 15FC493 T09 C~8eRm 2015 03 20.53554 12 06 35.75 -00 17 19.6 24.1i 15FC493 T09 C~8eRm 2015 03 25.45174 12 06 13.73 -00 14 48.9 25.3g 15FC493 T09 C~8eRm 2015 03 25.48492 12 06 13.59 -00 14 47.9 25.9g 15FC493 T09 C~8eRm 2015 03 25.51107 12 06 13.46 -00 14 47.0 24.7g 15FC493 T09 C~8eRm 2015 03 25.54115 12 06 13.32 -00 14 46.0 25.3g 15FC493 T09 C~8eRm 2015 03 29.27727 12 05 56.68 -00 12 52.0 24.3y 15FC493 T09 C~8eRm 2015 03 29.29096 12 05 56.62 -00 12 52.0 24.0y 15FC493 T09 C~8eRm 2015 03 29.33446 12 05 56.41 -00 12 50.5 24.6y 15FC493 T09 C~8eRm 2015 03 29.34265 12 05 56.37 -00 12 50.2 24.4y 15FC493 T09 C~8eRm 2015 03 29.35353 12 05 56.35 -00 12 49.7 24.7y 15FC493 T09 C~8eRm
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 -0.01 0.00 -0.09
2 0.0002 -6.66 0.08 0.28 0.09
3 0.0053 -143.52 -0.10 2.98 0.06
4 0.0054 -146.53 -0.03 2.77 -0.19
5 0.0055 -148.87 0.14 3.28 0.28
6 0.0056 -152.16 -0.06 2.94 -0.09
7 0.0191 -515.15 -0.02 9.88 -0.10
8 0.0192 -517.47 0.14 9.96 -0.04
9 0.0193 -519.62 -0.05 10.02 -0.02
10 0.0193 -521.94 -0.13 10.10 0.04
11 0.0296 -796.29 -0.02 15.45 0.18
12 0.0296 -797.12 0.16 15.09 -0.19
13 0.0297 -800.61 -0.10 15.22 -0.11
14 0.0298 -801.28 -0.16 15.25 -0.08
15 0.0298 -801.75 0.17 15.59 0.25
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.
15FC493 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