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: 17BG232
# Created Wed May 8 01:18:05 2024
# Orbit generated from Bernstein formalism
# Fitting 8 observations of 8
# Arc: 26.05d
# First observation: 2017/01/28
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000001 0.037735 -0.000000 -0.002438 0.027138 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 3.25 DOF: 11 RMS: 0.11
# Min/Max residuals: -0.23 0.19
# Exact a, adot, b, bdot, g, gdot:
1.546221E-05 2.351897E-02 -1.555662E-06 -1.925169E-03 2.373341E-02 -1.020192E-03
# Covariance matrix:
3.2835E-11 5.0717E-08 -1.1938E-12 -1.7997E-09 1.1631E-08 5.0120E-08
5.0717E-08 7.9047E-05 -1.8604E-09 -2.8047E-06 1.8126E-05 7.7349E-05
-1.1938E-12 -1.8604E-09 3.3300E-13 6.1966E-11 -4.2669E-10 -1.8883E-09
-1.7997E-09 -2.8047E-06 6.1966E-11 9.9676E-08 -6.4325E-07 -2.8273E-06
1.1631E-08 1.8126E-05 -4.2669E-10 -6.4325E-07 4.1582E-06 1.9124E-05
5.0120E-08 7.7349E-05 -1.8883E-09 -2.8273E-06 1.9124E-05 1.1464E-03
# lat0 lon0 xBary yBary zBary JD0
1.946373 -172.518007 0.846697 0.017336 -0.505222 2457782.092741
# Heliocentric elements and errors
Epoch: 2457780.5000 = 2017/01/27
Mean Anomaly: 323.72429 +/- 220.474
Argument of Peri: 201.11195 +/- 28.933
Long of Asc Node: 28.82915 +/- 4.495
Inclination: 5.01750 +/- 0.972
Eccentricity: 0.09861517 +/- 0.9942
Semi-Major Axis: 46.14326348 +/- 21.9649
Time of Perihelion: 2469317.0048 +/- 184420.1
Perihelion: 41.59283762 +/- 49.9657
Aphelion: 50.69368934 +/- 51.8351
Period (y) 313.4517 +/- 223.81
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.36654592 +/- 3.5873
Ecliptic Y -4.71449204 +/- 0.4709
Ecliptic Z 1.43098894 +/- 0.1230
Ecliptic XDOT 0.00046531 +/- 0.0038
Ecliptic YDOT -0.00268238 +/- 0.0010
Ecliptic ZDOT -0.00022601 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 42.65206182 +/- 3.5637
Geocenter to KBO 42.13469634 +/- 3.6202
# Hcoef: 8.50
The following table shows the complete astrometric record for 17BG232. 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 (17BG232) followed by the observatory code and reference code for the source of the astrometry.
2017 01 28.59194 12 30 33.47 -01 10 50.4 24.3z 17BG232 T09 C~7xTo 2017 01 28.61959 12 30 33.41 -01 10 50.3 24.1z 17BG232 T09 C~7xTo 2017 01 28.64259 12 30 33.36 -01 10 49.7 24.5z 17BG232 T09 C~7xTo 2017 01 28.64799 12 30 33.36 -01 10 49.6 24.6z 17BG232 T09 C~7xTo 2017 01 28.65069 12 30 33.36 -01 10 49.6 24.1z 17BG232 T09 C~7xTo 2017 02 23.52167 12 29 21.94 -01 02 41.8 25.3r 17BG232 T09 C~7xTo 2017 02 23.56346 12 29 21.80 -01 02 40.8 25.3r 17BG232 T09 C~7xTo 2017 02 23.63774 12 29 21.50 -01 02 39.0 25.4r 17BG232 T09 C~7xTo
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 0.04 0.00 0.06
2 0.0001 -0.87 0.05 -0.26 -0.23
3 0.0001 -1.79 -0.15 -0.01 0.00
4 0.0002 -1.83 -0.02 0.08 0.09
5 0.0002 -1.83 0.06 0.08 0.09
6 0.0710 -1178.51 0.03 25.75 -0.02
7 0.0711 -1180.83 0.19 25.84 0.07
8 0.0713 -1185.68 -0.23 25.72 -0.05
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.
17BG232 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