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: 17BJ233
# Created Tue Apr 1 01:11:01 2025
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000060 0.027604 0.000002 -0.002743 0.025570 0.000000
# Chi-squared of fit: 4.96 DOF: 32 RMS: 0.09
# Min/Max residuals: -0.17 0.22
# Exact a, adot, b, bdot, g, gdot:
1.643647E-05 2.748094E-02 -1.588289E-06 -2.756115E-03 2.604378E-02 -1.828598E-04
# Covariance matrix:
3.3016E-13 4.0367E-12 3.1188E-14 -3.8120E-13 1.7845E-12 1.3758E-10
4.0367E-12 4.7581E-10 2.9821E-12 -3.9749E-11 1.6250E-10 1.4297E-08
3.1188E-14 2.9821E-12 2.3473E-13 -5.1248E-13 1.0371E-12 9.0162E-11
-3.8120E-13 -3.9749E-11 -5.1248E-13 3.8295E-12 -1.3680E-11 -1.1980E-09
1.7845E-12 1.6250E-10 1.0371E-12 -1.3680E-11 5.6872E-11 4.9225E-09
1.3758E-10 1.4297E-08 9.0162E-11 -1.1980E-09 4.9225E-09 4.3095E-07
# lat0 lon0 xBary yBary zBary JD0
3.206847 -174.770874 -0.131025 0.055350 -0.985406 2457480.904541
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 358.86507 +/- 9.227
Argument of Peri: 152.77570 +/- 12.030
Long of Asc Node: 33.96822 +/- 0.011
Inclination: 6.52035 +/- 0.002
Eccentricity: 0.12747419 +/- 0.0002
Semi-Major Axis: 45.13908788 +/- 0.0163
Time of Perihelion: 2457829.7168 +/- 2839.2
Perihelion: 39.38501934 +/- 0.0169
Aphelion: 50.89315642 +/- 0.0205
Period (y) 303.2755 +/- 0.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -39.15183404 +/- 0.0111
Ecliptic Y -3.71707154 +/- 0.0010
Ecliptic Z 2.14791615 +/- 0.0006
Ecliptic XDOT 0.00026637 +/- 0.0001
Ecliptic YDOT -0.00288362 +/- 0.0000
Ecliptic ZDOT -0.00029035 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 39.38649861 +/- 0.0110
Geocenter to KBO 38.39688348 +/- 0.0111
# Hcoef: 9.30
The following table shows the complete astrometric record for 17BJ233. 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 (17BJ233) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.403752 12 24 16.91 +00 52 00.6 17BJ233 T09 C~83Eq 2016 04 02.525980 12 24 16.33 +00 52 04.0 17BJ233 T09 C~83Eq 2016 04 04.35736 12 24 07.69 +00 52 55.4 26.5g 17BJ233 T09 C~89UT 2016 04 04.41508 12 24 07.42 +00 52 57.1 25.7g 17BJ233 T09 C~89UT 2016 04 04.52167 12 24 06.91 +00 53 00.3 25.8g 17BJ233 T09 C~89UT 2016 06 05.317193 12 20 44.42 +01 09 43.1 17BJ233 T09 C~83Eq 2016 06 05.330622 12 20 44.40 +01 09 43.1 17BJ233 T09 C~83Eq 2016 06 05.345518 12 20 44.39 +01 09 43.2 17BJ233 T09 C~83Eq 2017 01 23.630400 12 34 02.91 -00 22 17.7 17BJ233 T09 C~83Eq 2017 01 28.60076 12 33 54.80 -00 21 10.3 25.0z 17BJ233 T09 C~7zpa 2017 01 28.64799 12 33 54.72 -00 21 09.8 24.4z 17BJ233 T09 C~7zpa 2017 02 02.61286 12 33 44.41 -00 19 49.7 24.9i 17BJ233 T09 C~7zpa 2017 02 02.62764 12 33 44.37 -00 19 49.5 24.8i 17BJ233 T09 C~7zpa 2017 02 02.64725 12 33 44.33 -00 19 49.2 24.9i 17BJ233 T09 C~7zpa 2017 02 23.53583 12 32 40.11 -00 12 14.3 25.3r 17BJ233 T09 C~7zpa 2017 02 23.56555 12 32 39.99 -00 12 13.6 25.2r 17BJ233 T09 C~7zpa 2017 02 23.57406 12 32 39.95 -00 12 13.4 25.2r 17BJ233 T09 C~7zpa 2017 02 23.60801 12 32 39.83 -00 12 12.6 24.9r 17BJ233 T09 C~7zpa 2017 02 23.63774 12 32 39.71 -00 12 11.7 25.7r 17BJ233 T09 C~7zpa
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 0.05 0.00 -0.02
2 0.0003 -9.33 0.18 -0.32 -0.02
3 0.0053 -148.68 -0.11 -4.47 -0.11
4 0.0055 -153.07 -0.05 -4.51 0.01
5 0.0058 -161.36 -0.14 -4.60 0.22
6 0.1750 -3347.35 0.04 -286.55 -0.05
7 0.1750 -3347.63 -0.02 -286.67 -0.09
8 0.1751 -3347.81 0.05 -286.64 0.04
9 0.8110 9844.38 0.11 -610.11 -0.17
10 0.8246 9705.67 -0.04 -596.42 0.13
11 0.8248 9704.37 0.21 -596.44 0.02
12 0.8384 9530.26 -0.07 -584.16 0.05
13 0.8384 9529.63 -0.11 -584.22 -0.03
14 0.8384 9528.96 -0.01 -584.18 -0.03
15 0.8956 8462.23 0.03 -548.24 0.09
16 0.8957 8460.30 -0.02 -548.31 0.01
17 0.8957 8459.67 -0.11 -548.37 -0.05
18 0.8958 8457.69 0.07 -548.35 -0.05
19 0.8959 8455.68 -0.06 -548.23 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.
17BJ233 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.624 45.150 44.494 ecceobj 0.117 0.143 0.120 incobj 6.543 6.536 6.548 qmin 38.578 37.778 38.398 qmax 51.344 53.260 51.330 amean 44.844 45.352 44.718 amin 44.475 44.970 44.344 amax 45.248 45.784 45.124 emean 0.121 0.148 0.122 emin 0.106 0.132 0.107 emax 0.136 0.164 0.138 imean 5.840 5.909 5.802 imin 5.069 5.103 5.011 imax 6.553 6.688 6.562 excite_mean 0.159 0.180 0.159 fracstop 1.000 1.000 1.000 cjmean 3.081 3.078 3.079 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 180.4 181.6 179.8 kozaiamp 179.9 180.0 180.0