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: 15FC475
# Created Wed Jul 17 01:10:49 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 15 observations of 15
# Arc: 8.96y
# First observation: 2015/03/23
# Last observation: 2024/03/08
# Chi-squared of fit: 8.97 DOF: 24 RMS: 0.14
# Min/Max residuals: -0.26 0.30
# Exact a, adot, b, bdot, g, gdot:
1.312753E-05 2.105720E-02 -3.573498E-07 -7.814262E-05 2.292441E-02 -1.453775E-03
# Covariance matrix:
1.9808E-13 1.1958E-13 1.1122E-15 -4.6957E-16 3.5077E-13 7.7375E-13
1.1958E-13 1.1117E-12 5.2157E-15 -4.2538E-15 1.6607E-12 6.1479E-12
1.1122E-15 5.2157E-15 1.6432E-13 -1.9659E-14 1.1800E-14 2.8989E-14
-4.6957E-16 -4.2538E-15 -1.9659E-14 5.6834E-15 -5.8133E-15 -2.3644E-14
3.5077E-13 1.6607E-12 1.1800E-14 -5.8133E-15 3.7279E-12 9.2301E-12
7.7375E-13 6.1479E-12 2.8989E-14 -2.3644E-14 9.2301E-12 3.4172E-11
# lat0 lon0 xBary yBary zBary JD0
2.298725 157.294589 -0.415342 0.036328 -0.901733 2457104.651598
# Heliocentric elements and errors
Epoch: 2457104.5000 = 2015/03/23
Mean Anomaly: 240.05973 +/- 0.249
Argument of Peri: 222.59017 +/- 0.223
Long of Asc Node: 61.87148 +/- 0.005
Inclination: 2.26411 +/- 0.000
Eccentricity: 0.07055756 +/- 0.0002
Semi-Major Axis: 42.86701356 +/- 0.0116
Time of Perihelion: 2491258.8321 +/- 76.0
Perihelion: 39.84242146 +/- 0.0131
Aphelion: 45.89160565 +/- 0.0145
Period (y) 280.6681 +/- 0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.20483829 +/- 0.0034
Ecliptic Y 16.78916826 +/- 0.0014
Ecliptic Z 1.74964233 +/- 0.0001
Ecliptic XDOT -0.00081440 +/- 0.0000
Ecliptic YDOT -0.00239258 +/- 0.0000
Ecliptic ZDOT -0.00001620 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.52841175 +/- 0.0032
Geocenter to KBO 43.62169977 +/- 0.0037
# Hcoef: 6.70
The following table shows the complete astrometric record for 15FC475. 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 (15FC475) followed by the observatory code and reference code for the source of the astrometry.
2015 03 23.15082 10 39 28.29 +10 57 55.3 22.7R 15FC475 695 C~7xQY 2015 03 23.15697 10 39 28.25 +10 57 55.4 22.6R 15FC475 695 C~7xQY 2015 03 23.21731 10 39 27.99 +10 57 56.8 15FC475 695 C~7xQY 2015 03 23.22247 10 39 27.97 +10 57 57.0 15FC475 695 C~7xQY 2015 03 23.27719 10 39 27.74 +10 57 58.2 15FC475 695 C~7xQY 2015 03 23.28187 10 39 27.73 +10 57 58.4 15FC475 695 C~7xQY 2015 04 15.19942 10 38 08.85 +11 04 58.5 23.0R 15FC475 695 C~7xQY 2015 04 15.27604 10 38 08.63 +11 04 59.7 15FC475 695 C~7xQY 2015 04 15.34908 10 38 08.44 +11 05 00.6 15FC475 695 C~7xQY 2023 03 21.34242 11 16 00.754 +07 09 02.91 23.1r 15FC475 568 C~7xQY 2023 03 21.54728 11 15 59.854 +07 09 08.19 23.1r 15FC475 568 C~7xQY 2023 05 15.11798 11 13 12.724 +07 24 40.49 23.1r 15FC475 304 C~7xQY 2023 05 16.09865 11 13 11.503 +07 24 45.53 23.0r 15FC475 304 C~7xQY 2024 03 07.28361 11 21 31.838 +06 33 17.24 23.1r 15FC475 304 C~7xQZ 2024 03 08.27879 11 21 27.486 +06 33 44.88 23.2r 15FC475 304 C~7xQZ
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 0.30 0.00 -0.05
2 0.0000 0.00 0.07 0.00 -0.09
3 0.0002 0.00 -0.16 0.00 -0.03
4 0.0002 0.00 -0.15 0.00 0.05
5 0.0003 0.00 -0.26 0.00 0.04
6 0.0004 0.00 -0.13 0.00 0.14
7 0.0631 0.00 0.01 0.00 -0.07
8 0.0633 0.00 -0.01 0.00 0.07
9 0.0635 0.00 0.26 0.00 -0.04
10 7.9950 0.00 0.16 0.00 -0.06
11 7.9956 0.00 0.01 0.00 -0.12
12 8.1450 0.00 -0.25 0.00 -0.07
13 8.1477 0.00 0.18 0.00 0.25
14 8.9586 0.00 -0.06 0.00 0.01
15 8.9613 0.00 0.01 0.00 -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.
15FC475 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.569 42.569 42.569 ecceobj 0.073 0.073 0.073 incobj 2.263 2.263 2.263 qmin 38.696 38.693 38.701 qmax 46.915 46.913 46.918 amean 42.672 42.671 42.671 amin 42.334 42.333 42.336 amax 43.041 43.043 43.036 emean 0.065 0.065 0.065 emin 0.035 0.035 0.035 emax 0.090 0.090 0.090 imean 1.300 1.300 1.300 imin 0.900 0.900 0.900 imax 1.715 1.715 1.715 excite_mean 0.069 0.069 0.069 fracstop 1.000 1.000 1.000 cjmean 3.080 3.080 3.080 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 184.9 184.9 185.0 kozaiamp 180.0 180.0 180.0