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 Wed Dec 25 02:10:50 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 35 observations of 35
# Arc: 5.97y
# First observation: 2015/03/28
# Last observation: 2021/03/17
# Chi-squared of fit: 13.44 DOF: 64 RMS: 0.11
# Min/Max residuals: -0.27 0.27
# Exact a, adot, b, bdot, g, gdot:
1.316030E-05 1.555954E-02 -7.864852E-07 -1.498658E-03 1.898396E-02 -6.419867E-03
# Covariance matrix:
9.3786E-13 -8.3622E-13 -6.5243E-14 6.5639E-14 4.2344E-14 -6.8018E-12
-8.3622E-13 7.9137E-13 6.3977E-14 -6.4276E-14 -3.0262E-14 6.6604E-12
-6.5243E-14 6.3977E-14 1.6330E-13 -8.1890E-14 9.9547E-16 5.8325E-13
6.5639E-14 -6.4276E-14 -8.1890E-14 5.5726E-14 -4.7667E-17 -5.8375E-13
4.2344E-14 -3.0262E-14 9.9547E-16 -4.7667E-17 1.1915E-13 3.3810E-15
-6.8018E-12 6.6604E-12 5.8325E-13 -5.8375E-13 3.3810E-15 6.0485E-11
# lat0 lon0 xBary yBary zBary JD0
1.770581 -175.301208 -0.040694 0.030866 -0.993608 2457109.715149
# Heliocentric elements and errors
Epoch: 2457110.5000 = 2015/03/29
Mean Anomaly: 303.63027 +/- 0.037
Argument of Peri: 263.40009 +/- 0.011
Long of Asc Node: 22.21657 +/- 0.002
Inclination: 5.76898 +/- 0.001
Eccentricity: 0.38433720 +/- 0.0004
Semi-Major Axis: 58.37438907 +/- 0.0183
Time of Perihelion: 2482618.4422 +/- 66.6
Perihelion: 35.93894004 +/- 0.0286
Aphelion: 80.80983811 +/- 0.0365
Period (y) 446.0071 +/- 0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -53.46446720 +/- 0.0010
Ecliptic Y -4.43533402 +/- 0.0001
Ecliptic Z 1.62751294 +/- 0.0000
Ecliptic XDOT 0.00109615 +/- 0.0000
Ecliptic YDOT -0.00216702 +/- 0.0000
Ecliptic ZDOT -0.00024455 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 53.67308651 +/- 0.0010
Geocenter to KBO 52.67637278 +/- 0.0010
# Hcoef: 6.21
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.
2015 03 28.214371 12 20 03.552 -00 14 30.73 22.6z 17BL232 W84 C~8HK0 2016 04 02.383123 12 22 52.18 -00 38 28.3 17BL232 T09 C~81Bn 2016 04 02.515196 12 22 51.69 -00 38 25.3 17BL232 T09 C~81Bn 2016 04 04.34027 12 22 45.12 -00 37 45.1 24.6g 17BL232 T09 C~89UT 2016 04 04.34598 12 22 45.10 -00 37 44.9 24.7g 17BL232 T09 C~89UT 2016 04 04.36377 12 22 45.04 -00 37 44.4 25.3g 17BL232 T09 C~89UT 2016 04 04.41735 12 22 44.84 -00 37 43.3 24.8g 17BL232 T09 C~89UT 2016 04 15.24895 12 22 06.87 -00 33 53.3 23.2y 17BL232 T09 C~8COq 2016 04 15.26605 12 22 06.80 -00 33 53.0 23.2y 17BL232 T09 C~8COq 2016 04 15.34534 12 22 06.55 -00 33 51.3 23.3y 17BL232 T09 C~8COq 2016 04 15.35761 12 22 06.52 -00 33 51.3 22.8y 17BL232 T09 C~8COq 2016 04 15.37114 12 22 06.46 -00 33 51.0 23.2y 17BL232 T09 C~8COq 2016 04 15.41900 12 22 06.29 -00 33 49.8 22.9y 17BL232 T09 C~8COq 2016 06 04.25539 12 20 08.25 -00 23 03.2 23.7z 17BL232 T09 C~89UT 2016 06 04.26765 12 20 08.24 -00 23 03.2 23.4z 17BL232 T09 C~89UT 2016 06 04.28388 12 20 08.24 -00 23 03.2 23.1z 17BL232 T09 C~89UT 2016 06 04.30544 12 20 08.21 -00 23 03.0 23.6z 17BL232 T09 C~89UT 2016 06 04.33787 12 20 08.17 -00 23 02.9 23.6z 17BL232 T09 C~89UT 2016 06 05.311488 12 20 07.23 -00 22 59.7 22.8r 17BL232 T09 C~81Bn 2016 06 05.339160 12 20 07.21 -00 22 59.6 17BL232 T09 C~81Bn 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 2017 03 30.154779 12 26 17.35 -01 06 15.5 17BL232 W84 C~81Bn 2021 03 17.229379 12 40 20.38 -03 00 19.8 22.6i 17BL232 W84 C~81Bn
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 -0.08 0.00 -0.07
2 1.0162 0.00 0.14 0.00 -0.12
3 1.0166 0.00 0.07 0.00 -0.04
4 1.0216 0.00 -0.09 0.00 -0.11
5 1.0216 0.00 -0.07 0.00 -0.04
6 1.0216 0.00 0.00 0.00 0.07
7 1.0218 0.00 -0.06 0.00 -0.00
8 1.0514 0.00 -0.10 0.00 0.10
9 1.0515 0.00 -0.27 0.00 0.05
10 1.0517 0.00 0.09 0.00 0.14
11 1.0517 0.00 0.27 0.00 -0.11
12 1.0518 0.00 0.07 0.00 -0.08
13 1.0519 0.00 0.01 0.00 0.14
14 1.1883 0.00 -0.21 0.00 0.05
15 1.1884 0.00 -0.16 0.00 0.00
16 1.1884 0.00 0.10 0.00 -0.06
17 1.1885 0.00 -0.00 0.00 0.06
18 1.1886 0.00 -0.08 0.00 0.05
19 1.1912 0.00 0.01 0.00 -0.10
20 1.1913 0.00 0.12 0.00 -0.09
21 1.8272 0.00 0.07 0.00 0.09
22 1.8272 0.00 0.08 0.00 0.02
23 1.8273 0.00 0.13 0.00 -0.01
24 1.8273 0.00 -0.26 0.00 -0.03
25 1.8409 0.00 -0.15 0.00 -0.03
26 1.8409 0.00 0.00 0.00 -0.10
27 1.8409 0.00 0.10 0.00 0.12
28 1.8409 0.00 -0.06 0.00 0.06
29 1.8410 0.00 0.11 0.00 0.21
30 1.9119 0.00 0.09 0.00 0.04
31 1.9120 0.00 -0.25 0.00 0.13
32 1.9121 0.00 -0.05 0.00 -0.12
33 1.9122 0.00 0.11 0.00 -0.00
34 2.0067 0.00 0.08 0.00 -0.04
35 5.9713 0.00 -0.02 0.00 -0.06
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:3 Type: 8:3EEEEE 8:3EEEEE 8:3EEEEE axisobj 57.702 57.702 57.703 ecceobj 0.384 0.384 0.384 incobj 5.801 5.801 5.801 qmin 35.152 35.210 35.189 qmax 82.217 82.205 82.202 amean 57.901 57.901 57.900 amin 57.057 57.039 57.018 amax 58.972 58.985 58.975 emean 0.381 0.381 0.381 emin 0.370 0.370 0.369 emax 0.394 0.394 0.394 imean 5.899 5.858 5.896 imin 5.539 5.495 5.469 imax 6.276 6.278 6.282 excite_mean 0.395 0.395 0.395 fracstop 1.000 1.000 1.000 cjmean 3.070 3.071 3.070 libcent 0 179.0 179.0 179.3 libamp 0 157.3 157.2 157.7 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 187.5 179.3 180.3 kozaiamp 179.9 180.0 180.0