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: 17BL232
# Created Tue May 7 01:17:24 2024
# Orbit generated from Bernstein formalism
# Fitting 13 observations of 13
# Arc: 31.02d
# First observation: 2017/01/23
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.017007 -0.000000 -0.001586 0.019405 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# Chi-squared of fit: 5.39 DOF: 21 RMS: 0.11
# Min/Max residuals: -0.26 0.21
# Exact a, adot, b, bdot, g, gdot:
1.310895E-05 1.597329E-02 -1.663984E-06 -1.546770E-03 1.904533E-02 4.042851E-03
# Covariance matrix:
2.8268E-13 -1.9127E-11 -1.0821E-15 2.5365E-13 -1.3435E-13 2.7958E-09
-1.9127E-11 7.8409E-08 -7.8076E-12 -2.6589E-09 2.2535E-08 3.1191E-06
-1.0821E-15 -7.8076E-12 1.9463E-13 -2.3711E-12 -2.3934E-12 -4.2103E-10
2.5365E-13 -2.6589E-09 -2.3711E-12 1.7737E-10 -7.8154E-10 -1.1825E-07
-1.3435E-13 2.2535E-08 -2.3934E-12 -7.8154E-10 6.7325E-09 1.0836E-06
2.7958E-09 3.1191E-06 -4.2103E-10 -1.1825E-07 1.0836E-06 2.6369E-04
# lat0 lon0 xBary yBary zBary JD0
1.594173 -172.681238 0.886618 0.012170 -0.431144 2457777.108391
# Heliocentric elements and errors
Epoch: 2457770.5000 = 2017/01/17
Mean Anomaly: 72.42907 +/- 117.730
Argument of Peri: 65.17668 +/- 47.928
Long of Asc Node: 22.45433 +/- 0.433
Inclination: 5.68608 +/- 0.150
Eccentricity: 0.22740905 +/- 0.9562
Semi-Major Axis: 53.92490670 +/- 27.0673
Time of Perihelion: 2428670.5040 +/- 41920.2
Perihelion: 41.66189512 +/- 55.6421
Aphelion: 66.18791828 +/- 61.3390
Period (y) 395.9974 +/- 298.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -52.60235569 +/- 0.2243
Ecliptic Y -5.86647914 +/- 0.0288
Ecliptic Z 1.46062114 +/- 0.0063
Ecliptic XDOT -0.00028701 +/- 0.0023
Ecliptic YDOT -0.00235902 +/- 0.0003
Ecliptic ZDOT -0.00020616 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 52.94862430 +/- 0.2228
Geocenter to KBO 52.50630733 +/- 0.2262
# Hcoef: 6.05
The following table shows the complete astrometric record for 17BL232. 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 (17BL232) followed by the observatory code and reference code for the source of the astrometry.
2017 01 23.60759 12 29 24.12 -01 26 23.7 23.1i 17BL232 T09 C~7xTp 2017 01 23.61560 12 29 24.11 -01 26 23.7 23.6i 17BL232 T09 C~7xTp 2017 01 23.61828 12 29 24.11 -01 26 23.7 23.2i 17BL232 T09 C~7xTp 2017 01 23.62095 12 29 24.08 -01 26 23.7 23.2i 17BL232 T09 C~7xTp 2017 01 28.59194 12 29 17.00 -01 25 33.7 22.9z 17BL232 T09 C~7xTp 2017 01 28.59808 12 29 17.00 -01 25 33.7 23.0z 17BL232 T09 C~7xTp 2017 01 28.61418 12 29 16.98 -01 25 33.3 22.8z 17BL232 T09 C~7xTp 2017 01 28.61959 12 29 16.96 -01 25 33.3 22.8z 17BL232 T09 C~7xTp 2017 01 28.65069 12 29 16.92 -01 25 32.8 22.9z 17BL232 T09 C~7xTp 2017 02 23.52167 12 28 16.55 -01 18 50.2 23.2r 17BL232 T09 C~7xTp 2017 02 23.56346 12 28 16.40 -01 18 49.3 23.5r 17BL232 T09 C~7xTp 2017 02 23.59748 12 28 16.31 -01 18 48.9 23.4r 17BL232 T09 C~7xTp 2017 02 23.62726 12 28 16.23 -01 18 48.2 23.4r 17BL232 T09 C~7xTp
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 0.03 0.00 0.08
2 0.0000 -0.14 0.07 -0.06 0.02
3 0.0000 -0.14 0.13 -0.06 0.01
4 0.0000 -0.55 -0.23 -0.24 -0.16
5 0.0136 -117.83 -0.10 3.80 -0.12
6 0.0137 -117.83 0.06 3.80 -0.13
7 0.0137 -118.27 0.07 4.05 0.12
8 0.0137 -118.54 -0.06 3.93 -0.00
9 0.0138 -119.29 0.04 4.16 0.21
10 0.0846 -1110.00 0.10 16.73 0.07
11 0.0848 -1112.42 -0.26 16.67 0.02
12 0.0848 -1113.82 0.03 16.50 -0.14
13 0.0849 -1115.20 0.13 16.67 0.04
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.
17BL232 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