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 Mon Apr 28 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting 22 observations of 22
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000044 0.022631 0.000002 -0.001861 0.023363 0.000000
# Chi-squared of fit: 8.43 DOF: 38 RMS: 0.11
# Min/Max residuals: -0.27 0.29
# Exact a, adot, b, bdot, g, gdot:
1.452005E-05 2.255691E-02 -5.854912E-07 -1.869719E-03 2.370964E-02 -1.631346E-03
# Covariance matrix:
3.2821E-13 3.0863E-12 2.7820E-14 -2.4521E-13 1.4975E-12 1.2714E-10
3.0863E-12 3.2921E-10 2.2757E-12 -2.2067E-11 1.1364E-10 1.1411E-08
2.7820E-14 2.2757E-12 1.8688E-13 -3.7325E-13 8.0080E-13 7.9485E-11
-2.4521E-13 -2.2067E-11 -3.7325E-13 1.9530E-12 -7.6951E-12 -7.6831E-10
1.4975E-12 1.1364E-10 8.0080E-13 -7.6951E-12 4.0299E-11 3.9800E-09
1.2714E-10 1.1411E-08 7.9485E-11 -7.6831E-10 3.9800E-09 3.9732E-07
# lat0 lon0 xBary yBary zBary JD0
2.057049 -174.863383 -0.132380 0.035560 -0.986133 2457480.890761
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 279.75024 +/- 1.529
Argument of Peri: 245.06240 +/- 1.315
Long of Asc Node: 28.26537 +/- 0.010
Inclination: 5.14267 +/- 0.002
Eccentricity: 0.06868668 +/- 0.0278
Semi-Major Axis: 43.47087663 +/- 0.1510
Time of Perihelion: 2480817.0829 +/- 427.6
Perihelion: 40.48500629 +/- 1.2169
Aphelion: 46.45674696 +/- 1.2194
Period (y) 286.6195 +/- 1.49
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.95516696 +/- 0.0112
Ecliptic Y -3.99655370 +/- 0.0010
Ecliptic Z 1.51392127 +/- 0.0004
Ecliptic XDOT 0.00041309 +/- 0.0001
Ecliptic YDOT -0.00258510 +/- 0.0000
Ecliptic ZDOT -0.00022252 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.16724184 +/- 0.0112
Geocenter to KBO 42.17694216 +/- 0.0113
# Hcoef: 8.57
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.
2016 04 02.389972 12 22 07.22 -00 09 08.2 17BG232 T09 C~83Eq 2016 04 02.501705 12 22 06.72 -00 09 05.1 17BG232 T09 C~83Eq 2016 04 04.34598 12 21 58.69 -00 08 15.9 25.5g 17BG232 T09 C~89UT 2016 04 04.36800 12 21 58.60 -00 08 15.1 26.2g 17BG232 T09 C~89UT 2016 04 04.38940 12 21 58.49 -00 08 14.7 26.0g 17BG232 T09 C~89UT 2016 06 04.25539 12 18 51.74 +00 08 48.5 24.6z 17BG232 T09 C~8COq 2016 06 04.28926 12 18 51.70 +00 08 48.8 24.1z 17BG232 T09 C~8COq 2016 06 04.32707 12 18 51.65 +00 08 48.6 24.7z 17BG232 T09 C~8COq 2016 06 04.34327 12 18 51.63 +00 08 48.8 25.0z 17BG232 T09 C~8COq 2016 06 05.311488 12 18 50.61 +00 08 51.5 17BG232 T09 C~83Eq 2016 06 05.356114 12 18 50.55 +00 08 51.6 17BG232 T09 C~83Eq 2017 01 23.646517 12 30 41.56 -01 11 50.4 17BG232 T09 C~83Eq 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 02.609406 12 30 23.28 -01 09 37.6 17BG232 T09 C~83Eq 2017 02 02.636127 12 30 23.22 -01 09 37.2 17BG232 T09 C~83Eq 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 0.11 0.00 -0.14
2 0.0003 -8.11 0.03 -0.13 -0.05
3 0.0054 -138.20 -0.02 -2.67 0.04
4 0.0054 -139.76 -0.00 -2.47 0.29
5 0.0055 -141.43 -0.15 -2.76 0.04
6 0.1721 -3119.07 0.02 -173.12 -0.02
7 0.1722 -3119.74 -0.05 -173.08 0.16
8 0.1723 -3120.35 0.00 -173.56 -0.17
9 0.1724 -3120.70 -0.07 -173.50 -0.04
10 0.1750 -3135.82 0.14 -177.08 -0.04
11 0.1751 -3136.69 -0.01 -177.34 -0.12
12 0.8111 8578.60 0.14 -399.66 0.02
13 0.8246 8443.21 -0.02 -392.56 0.06
14 0.8247 8442.34 -0.01 -392.83 -0.23
15 0.8248 8441.41 -0.21 -392.57 0.00
16 0.8248 8441.37 -0.08 -392.48 0.09
17 0.8248 8441.37 0.01 -392.48 0.09
18 0.8384 8273.78 0.12 -386.18 -0.00
19 0.8385 8272.79 0.15 -386.17 -0.01
20 0.8956 7262.96 0.00 -368.44 -0.01
21 0.8958 7260.63 0.16 -368.35 0.08
22 0.8960 7255.78 -0.27 -368.48 -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:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 43.020 43.524 42.926 ecceobj 0.068 0.142 0.028 incobj 5.166 5.171 5.164 qmin 39.756 36.997 41.320 qmax 46.940 51.041 45.099 amean 43.240 43.756 43.135 amin 42.903 43.285 42.808 amax 43.569 44.227 43.474 emean 0.059 0.113 0.021 emin 0.041 0.077 0.002 emax 0.078 0.154 0.038 imean 4.259 3.770 4.326 imin 3.400 2.750 3.521 imax 5.191 5.157 5.152 excite_mean 0.095 0.132 0.078 fracstop 1.000 1.000 1.000 cjmean 3.082 3.077 3.084 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 181.5 181.7 179.5 kozaiamp 180.0 180.0 180.0