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: 15KD163
# Created Tue May 7 01:16:33 2024
# Orbit generated from Bernstein formalism
# Fitting 8 observations of 8
# Arc: 28.05d
# First observation: 2015/05/27
# Last observation: 2015/06/24
Preliminary a, adot, b, bdot, g, gdot:
0.000000 0.025846 0.000000 0.011503 0.026121 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 3.01 DOF: 11 RMS: 0.11
# Min/Max residuals: -0.17 0.22
# Exact a, adot, b, bdot, g, gdot:
1.362215E-05 2.163137E-02 7.680197E-06 1.153894E-02 2.523078E-02 -8.482184E-03
# Covariance matrix:
1.8800E-12 2.7097E-09 -7.7998E-14 -5.4637E-11 5.1886E-10 1.6540E-08
2.7097E-09 4.8987E-06 -1.3971E-10 -1.0022E-07 9.3329E-07 2.7944E-05
-7.7998E-14 -1.3971E-10 3.7189E-13 -2.4590E-12 -2.6741E-11 -8.7751E-10
-5.4637E-11 -1.0022E-07 -2.4590E-12 2.3116E-09 -1.8897E-08 -4.4167E-07
5.1886E-10 9.3329E-07 -2.6741E-11 -1.8897E-08 1.7816E-07 5.5523E-06
1.6540E-08 2.7944E-05 -8.7751E-10 -4.4167E-07 5.5523E-06 3.0980E-04
# lat0 lon0 xBary yBary zBary JD0
2.815979 -75.445410 0.635862 0.038787 -0.786074 2457169.748887
# Heliocentric elements and errors
Epoch: 2457160.5000 = 2015/05/18
Mean Anomaly: 302.41539 +/- 55.568
Argument of Peri: 103.36037 +/- 11.832
Long of Asc Node: 278.53437 +/- 0.600
Inclination: 28.41729 +/- 2.743
Eccentricity: 0.34720062 +/- 0.6844
Semi-Major Axis: 43.86853269 +/- 20.1837
Time of Perihelion: 2474136.3693 +/- 11449.2
Perihelion: 28.63735078 +/- 32.7883
Aphelion: 59.09971461 +/- 40.5073
Period (y) 290.5614 +/- 200.53
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 9.52762728 +/- 0.1664
Ecliptic Y -39.23729689 +/- 0.6410
Ecliptic Z 1.94749052 +/- 0.0326
Ecliptic XDOT 0.00202273 +/- 0.0006
Ecliptic YDOT 0.00153306 +/- 0.0018
Ecliptic ZDOT 0.00120546 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 40.42442168 +/- 0.6234
Geocenter to KBO 39.63413314 +/- 0.6630
# Hcoef: 6.96
The following table shows the complete astrometric record for 15KD163. 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 (15KD163) followed by the observatory code and reference code for the source of the astrometry.
2015 05 27.248109 19 01 54.39 -19 50 41.1 23.1r 15KD163 W84 C~263c 2015 05 27.258859 19 01 54.35 -19 50 40.9 22.4r 15KD163 W84 C~263c 2015 05 27.269593 19 01 54.31 -19 50 40.9 22.8r 15KD163 W84 C~263c 2015 05 28.373667 19 01 49.82 -19 50 37.4 23.4r 15KD163 W84 C~263c 2015 06 21.283301 18 59 56.71 -19 50 00.6 15KD163 W84 C~5kc8 2015 06 21.317909 18 59 56.54 -19 50 00.9 15KD163 W84 C~5kc8 2015 06 21.352389 18 59 56.37 -19 50 00.7 15KD163 W84 C~5kc8 2015 06 24.302370 18 59 40.81 -19 50 00.9 23.3V 15KD163 W84 C~5kc8
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 0.0000 -0.54 0.06 0.26 0.07
3 0.0001 -1.10 0.11 0.32 0.03
4 0.0031 -63.72 -0.17 10.53 -0.00
5 0.0685 -1647.07 -0.14 214.34 0.17
6 0.0686 -1649.49 0.02 214.29 -0.16
7 0.0687 -1651.86 0.22 214.74 0.01
8 0.0768 -1870.28 -0.08 237.20 -0.02
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.
15KD163 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