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: 17BZ236
# Created Sun Dec 22 02:10:55 2024
# Orbit generated from Bernstein formalism
# Fitting 35 observations of 35
# Arc: 4.05y
# First observation: 2015/03/16
# Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
-0.002272 0.037530 -0.000771 0.012859 0.028615 0.000000
# Chi-squared of fit: 12.23 DOF: 64 RMS: 0.10
# Min/Max residuals: -0.25 0.24
# Exact a, adot, b, bdot, g, gdot:
1.869834E-05 3.520394E-02 6.953598E-06 1.208148E-02 2.901920E-02 -1.400664E-02
# Covariance matrix:
5.7221E-13 -5.5035E-13 1.2987E-13 -1.5306E-13 8.8385E-15 -2.8506E-12
-5.5035E-13 6.0938E-13 -1.5815E-13 1.8656E-13 1.4874E-14 3.4739E-12
1.2987E-13 -1.5815E-13 2.3905E-13 -1.5013E-13 -1.1345E-14 -1.0087E-12
-1.5306E-13 1.8656E-13 -1.5013E-13 1.2429E-13 1.4358E-14 1.1910E-12
8.8385E-15 1.4874E-14 -1.1345E-14 1.4358E-14 1.4890E-13 2.6483E-13
-2.8506E-12 3.4739E-12 -1.0087E-12 1.1910E-12 2.6483E-13 2.2176E-11
# lat0 lon0 xBary yBary zBary JD0
0.592415 -176.943410 0.133299 0.010292 -0.982532 2457097.954950
# Heliocentric elements and errors
Epoch: 2457090.5000 = 2015/03/09
Mean Anomaly: 354.28209 +/- 0.003
Argument of Peri: 51.31426 +/- 0.012
Long of Asc Node: 181.16172 +/- 0.000
Inclination: 18.94405 +/- 0.000
Eccentricity: 0.73567832 +/- 0.0001
Semi-Major Axis: 114.14664999 +/- 0.0433
Time of Perihelion: 2464165.5242 +/- 1.1
Perihelion: 30.17143478 +/- 0.0176
Aphelion: 198.12186519 +/- 0.0763
Period (y) 1219.5594 +/- 0.69
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.40046239 +/- 0.0005
Ecliptic Y -1.75686550 +/- 0.0000
Ecliptic Z 0.35654680 +/- 0.0000
Ecliptic XDOT 0.00150496 +/- 0.0000
Ecliptic YDOT -0.00325130 +/- 0.0000
Ecliptic ZDOT 0.00112621 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.44582400 +/- 0.0005
Geocenter to KBO 34.45994912 +/- 0.0005
# Hcoef: 9.23
The following table shows the complete astrometric record for 17BZ236. 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 (17BZ236) followed by the observatory code and reference code for the source of the astrometry.
2015 03 16.454172 12 12 09.64 -00 40 18.1 17BZ236 T09 C~86uk 2015 03 16.554822 12 12 09.14 -00 40 14.1 17BZ236 T09 C~86uk 2016 04 02.379703 12 19 20.63 -00 38 45.8 17BZ236 T09 C~86uk 2016 04 02.38998 12 19 20.56 -00 38 45.3 24.2i 17BZ236 T09 C~89UT 2016 04 02.40920 12 19 20.47 -00 38 44.6 24.3i 17BZ236 T09 C~89UT 2016 04 02.46633 12 19 20.17 -00 38 42.3 24.4i 17BZ236 T09 C~89UT 2016 04 02.51252 12 19 19.95 -00 38 40.4 23.8i 17BZ236 T09 C~89UT 2016 04 02.51521 12 19 19.95 -00 38 40.3 24.0i 17BZ236 T09 C~89UT 2016 04 04.34598 12 19 10.99 -00 37 28.8 25.2g 17BZ236 T09 C~89UT 2016 04 04.36164 12 19 10.89 -00 37 28.3 25.3g 17BZ236 T09 C~89UT 2016 04 04.38727 12 19 10.78 -00 37 27.5 25.3g 17BZ236 T09 C~89UT 2016 04 04.40435 12 19 10.68 -00 37 26.7 25.9g 17BZ236 T09 C~89UT 2016 04 04.40648 12 19 10.68 -00 37 26.7 25.0g 17BZ236 T09 C~89UT 2016 06 04.251947 12 15 52.14 -00 09 57.4 17BZ236 T09 C~86uk 2016 06 04.270359 12 15 52.14 -00 09 57.2 17BZ236 T09 C~86uk 2016 06 04.335164 12 15 52.06 -00 09 56.5 17BZ236 T09 C~86uk 2016 06 05.339160 12 15 51.32 -00 09 46.6 17BZ236 T09 C~86uk 2017 01 23.607577 12 32 34.07 -01 28 03.3 17BZ236 T09 C~86uk 2017 01 23.618266 12 32 34.05 -01 28 03.2 17BZ236 T09 C~86uk 2017 01 28.59808 12 32 26.75 -01 26 21.4 24.4z 17BZ236 T09 C~81Bp 2017 01 28.61959 12 32 26.70 -01 26 21.0 24.1z 17BZ236 T09 C~81Bp 2017 01 28.65069 12 32 26.64 -01 26 20.2 24.5z 17BZ236 T09 C~81Bp 2017 01 28.65336 12 32 26.63 -01 26 20.0 24.6z 17BZ236 T09 C~81Bp 2017 02 02.60942 12 32 16.88 -01 24 23.3 24.8i 17BZ236 T09 C~81Bp 2017 02 02.63614 12 32 16.81 -01 24 22.6 24.4i 17BZ236 T09 C~81Bp 2017 02 02.64454 12 32 16.80 -01 24 22.6 24.2i 17BZ236 T09 C~81Bp 2017 02 02.65294 12 32 16.76 -01 24 22.3 24.3i 17BZ236 T09 C~81Bp 2017 02 23.52167 12 31 11.87 -01 13 47.4 24.5r 17BZ236 T09 C~81Bp 2017 02 23.52446 12 31 11.86 -01 13 47.3 24.5r 17BZ236 T09 C~81Bp 2017 02 23.56346 12 31 11.70 -01 13 45.8 24.5r 17BZ236 T09 C~81Bp 2017 02 23.59748 12 31 11.56 -01 13 44.8 24.4r 17BZ236 T09 C~81Bp 2017 02 23.62726 12 31 11.44 -01 13 43.7 24.9r 17BZ236 T09 C~81Bp 2017 02 23.63774 12 31 11.41 -01 13 43.3 24.5r 17BZ236 T09 C~81Bp 2019 04 03.445387 12 46 39.84 -01 09 48.6 17BZ236 T09 C~86uk 2019 04 03.474912 12 46 39.68 -01 09 47.4 17BZ236 T09 C~86uk
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 0.10 0.00 -0.08
2 0.0003 -8.47 0.06 0.69 -0.03
3 1.0484 5898.25 0.14 2652.42 0.00
4 1.0484 5897.08 -0.15 2652.46 -0.02
5 1.0485 5895.57 -0.04 2652.57 -0.03
6 1.0486 5890.52 -0.25 2652.90 -0.05
7 1.0488 5886.73 -0.13 2653.33 0.10
8 1.0488 5886.69 0.06 2653.42 0.18
9 1.0538 5734.83 0.07 2665.68 0.24
10 1.0538 5733.25 -0.19 2665.55 0.01
11 1.0539 5731.42 0.13 2665.63 -0.07
12 1.0539 5729.72 -0.13 2665.77 -0.03
13 1.0539 5729.72 0.05 2665.77 -0.04
14 1.2205 2340.01 -0.04 2996.80 -0.19
15 1.2206 2339.93 0.18 2996.99 -0.08
16 1.2208 2338.55 -0.13 2997.15 -0.17
17 1.2235 2324.43 0.15 3001.83 -0.06
18 1.8594 18042.51 0.10 4664.62 0.05
19 1.8595 18042.20 0.06 4664.59 -0.08
20 1.8731 17900.33 0.14 4714.84 0.02
21 1.8731 17899.47 0.02 4714.91 -0.11
22 1.8732 17898.32 -0.07 4715.29 -0.02
23 1.8732 17898.10 -0.20 4715.41 0.08
24 1.8868 17716.31 0.04 4764.75 0.17
25 1.8869 17715.06 -0.09 4764.98 0.15
26 1.8869 17714.92 0.13 4764.92 0.01
27 1.8869 17714.24 -0.19 4764.96 -0.03
28 1.9441 16561.28 0.05 4962.43 0.03
29 1.9441 16561.10 0.07 4962.46 0.04
30 1.9442 16558.28 -0.03 4962.89 0.14
31 1.9443 16555.94 -0.00 4962.98 -0.07
32 1.9443 16553.84 -0.04 4963.27 -0.02
33 1.9444 16553.27 0.12 4963.46 0.08
34 4.0493 29432.51 0.04 10758.53 -0.05
35 4.0493 29429.77 -0.03 10758.68 -0.08
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.
17BZ236 quality flag:2 Type: CENTAURR CENTAURS CENTAURS axisobj 110.526 110.617 110.435 ecceobj 0.728 0.728 0.727 incobj 19.019 19.019 19.020 qmin 28.455 28.729 28.565 qmax 212.727 214.456 237.317 amean 113.652 110.892 118.996 amin 104.822 99.489 106.180 amax 121.256 122.826 134.189 emean 0.737 0.726 0.744 emin 0.702 0.686 0.700 emax 0.754 0.752 0.772 imean 17.943 18.921 18.689 imin 16.535 17.148 16.675 imax 20.479 21.590 22.028 excite_mean 0.799 0.795 0.811 fracstop 0.529 1.000 1.000 cjmean 2.762 2.766 2.765 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 114.0 155.0 172.2 kozaiamp 62.0 108.1 114.3