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: 17BF232
# Created Tue May 7 01:17:24 2024
# Orbit generated from Bernstein formalism
# Fitting 7 observations of 7
# Arc: 26.04d
# First observation: 2017/01/28
# Last observation: 2017/02/23
# WARNING Fitting with energy constraint
# WARNING and with gdot fixed = 0
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# Chi-squared of fit: 3.52 DOF: 10 RMS: 0.13
# Min/Max residuals: -0.22 0.27
# Exact a, adot, b, bdot, g, gdot:
1.373270E-05 2.047438E-02 -5.015781E-07 1.820044E-04 2.234373E-02 0.000000E+00
# Covariance matrix:
3.6562E-11 5.2261E-08 -1.0269E-12 -1.4644E-09 1.1971E-08 0.0000E+00
5.2261E-08 7.5460E-05 -1.4827E-09 -2.1142E-06 1.7283E-05 0.0000E+00
-1.0269E-12 -1.4827E-09 3.8979E-13 3.6483E-11 -3.3957E-10 0.0000E+00
-1.4644E-09 -2.1142E-06 3.6483E-11 5.9402E-08 -4.8421E-07 0.0000E+00
1.1971E-08 1.7283E-05 -3.3957E-10 -4.8421E-07 3.9583E-06 0.0000E+00
0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 0.0000E+00 1.4679E-04
# lat0 lon0 xBary yBary zBary JD0
1.522473 -172.296711 0.848643 0.013511 -0.502063 2457782.092741
# Heliocentric elements and errors
Epoch: 2457780.5000 = 2017/01/27
Mean Anomaly: 212.63983 +/- 167.820
Argument of Peri: 219.97109 +/- 135.760
Long of Asc Node: 116.23354 +/- 30.233
Inclination: 1.59767 +/- 0.301
Eccentricity: 0.03713856 +/- 0.5685
Semi-Major Axis: 43.88003767 +/- 20.0389
Time of Perihelion: 2501239.1798 +/- 260133.3
Perihelion: 42.25039633 +/- 31.5364
Aphelion: 45.50967901 +/- 32.4684
Period (y) 290.6757 +/- 199.12
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.95042227 +/- 3.9478
Ecliptic Y -5.22808556 +/- 0.5338
Ecliptic Z 1.18907043 +/- 0.1059
Ecliptic XDOT 0.00033975 +/- 0.0015
Ecliptic YDOT -0.00249277 +/- 0.0009
Ecliptic ZDOT 0.00002223 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 45.26905377 +/- 3.9205
Geocenter to KBO 44.75527824 +/- 3.9851
# Hcoef: 8.55
The following table shows the complete astrometric record for 17BF232. 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 (17BF232) followed by the observatory code and reference code for the source of the astrometry.
2017 01 28.59194 12 30 42.13 -01 39 26.8 24.7z 17BF232 T09 C~7xTo 2017 01 28.59808 12 30 42.10 -01 39 26.8 24.7z 17BF232 T09 C~7xTo 2017 01 28.61959 12 30 42.06 -01 39 26.5 25.1z 17BF232 T09 C~7xTo 2017 01 28.65069 12 30 42.01 -01 39 26.1 24.9z 17BF232 T09 C~7xTo 2017 02 23.52167 12 29 34.12 -01 31 22.8 25.4r 17BF232 T09 C~7xTo 2017 02 23.59748 12 29 33.87 -01 31 21.3 24.7r 17BF232 T09 C~7xTo 2017 02 23.62726 12 29 33.77 -01 31 20.1 25.6r 17BF232 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 0.16 0.00 0.13
2 0.0000 -0.41 -0.07 -0.18 -0.06
3 0.0001 -1.08 -0.09 -0.14 -0.05
4 0.0002 -1.93 0.01 -0.07 -0.02
5 0.0710 -1128.00 -0.13 42.55 -0.05
6 0.0712 -1132.03 0.15 42.45 -0.22
7 0.0713 -1133.88 -0.01 42.97 0.27
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.
17BF232 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