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: 17BE232
# Created Fri Nov 1 01:10:29 2024
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 1.93y
# First observation: 2015/03/20
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000238 0.033173 -0.000005 -0.001507 0.027980 0.000000
# Chi-squared of fit: 5.42 DOF: 32 RMS: 0.09
# Min/Max residuals: -0.28 0.24
# Exact a, adot, b, bdot, g, gdot:
1.759625E-05 3.304816E-02 -7.078303E-07 -1.517124E-03 2.904407E-02 -2.334494E-04
# Covariance matrix:
7.2464E-13 -8.4668E-13 -6.5365E-15 2.1085E-14 -8.0522E-15 -5.7933E-12
-8.4668E-13 5.5055E-12 8.0034E-14 -2.8495E-13 6.9099E-12 9.1486E-11
-6.5365E-15 8.0034E-14 5.1108E-13 -3.0025E-13 1.1229E-13 1.4226E-12
2.1085E-14 -2.8495E-13 -3.0025E-13 2.1847E-13 -4.0966E-13 -5.1166E-12
-8.0522E-15 6.9099E-12 1.1229E-13 -4.0966E-13 1.2201E-11 1.3592E-10
-5.7933E-12 9.1486E-11 1.4226E-12 -5.1166E-12 1.3592E-10 1.6657E-09
# lat0 lon0 xBary yBary zBary JD0
2.070466 -177.163108 0.060771 0.035925 -0.990200 2457101.958763
# Heliocentric elements and errors
Epoch: 2457100.5000 = 2015/03/19
Mean Anomaly: 357.89720 +/- 0.340
Argument of Peri: 145.45791 +/- 0.485
Long of Asc Node: 40.22572 +/- 0.008
Inclination: 3.30434 +/- 0.001
Eccentricity: 0.16864111 +/- 0.0004
Semi-Major Axis: 42.60115582 +/- 0.0205
Time of Perihelion: 2457693.7339 +/- 95.9
Perihelion: 35.41684968 +/- 0.0227
Aphelion: 49.78546196 +/- 0.0282
Period (y) 278.0611 +/- 0.20
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.36153514 +/- 0.0041
Ecliptic Y -1.69147441 +/- 0.0002
Ecliptic Z 1.24391587 +/- 0.0002
Ecliptic XDOT 0.00016759 +/- 0.0000
Ecliptic YDOT -0.00311643 +/- 0.0000
Ecliptic ZDOT -0.00014363 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.42381374 +/- 0.0041
Geocenter to KBO 34.43043365 +/- 0.0041
# Hcoef: 9.50
The following table shows the complete astrometric record for 17BE232. 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 (17BE232) followed by the observatory code and reference code for the source of the astrometry.
2015 03 20.457985 12 13 42.19 +00 46 19.1 17BE232 T09 C~81Bn 2015 03 25.482793 12 13 16.05 +00 49 04.9 17BE232 T09 C~81Bn 2016 04 02.414605 12 19 20.79 +00 03 43.3 17BE232 T09 C~81Bn 2016 04 02.441875 12 19 20.64 +00 03 44.2 17BE232 T09 C~81Bn 2016 04 02.523267 12 19 20.22 +00 03 46.9 17BE232 T09 C~81Bn 2016 04 04.345971 12 19 10.89 +00 04 44.6 17BE232 T09 C~81Bn 2016 04 04.419468 12 19 10.51 +00 04 47.0 17BE232 T09 C~81Bn 2017 01 23.60759 12 30 48.96 -01 17 04.4 24.7i 17BE232 T09 C~7xTo 2017 01 23.61828 12 30 48.95 -01 17 04.4 24.4i 17BE232 T09 C~7xTo 2017 01 23.62095 12 30 48.93 -01 17 04.2 24.5i 17BE232 T09 C~7xTo 2017 01 23.64653 12 30 48.88 -01 17 03.9 24.5i 17BE232 T09 C~7xTo 2017 01 28.598065 12 30 40.00 -01 15 55.4 17BE232 T09 C~81Bn 2017 01 28.650680 12 30 39.88 -01 15 54.7 17BE232 T09 C~81Bn 2017 02 02.609406 12 30 28.55 -01 14 31.3 17BE232 T09 C~81Bn 2017 02 02.644530 12 30 28.45 -01 14 30.6 17BE232 T09 C~81Bn 2017 02 23.52167 12 29 17.67 -01 06 21.9 25.0r 17BE232 T09 C~7xTo 2017 02 23.56346 12 29 17.48 -01 06 20.9 25.5r 17BE232 T09 C~7xTo 2017 02 23.59748 12 29 17.34 -01 06 19.9 25.4r 17BE232 T09 C~7xTo 2017 02 23.62726 12 29 17.22 -01 06 19.0 25.1r 17BE232 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 0.08 0.00 -0.02
2 0.0138 -425.66 -0.08 -3.62 0.08
3 1.0375 5677.69 0.00 -326.88 -0.09
4 1.0376 5675.27 -0.10 -326.95 -0.10
5 1.0378 5668.41 -0.06 -326.97 0.04
6 1.0428 5516.94 0.07 -329.65 -0.03
7 1.0430 5510.75 0.08 -329.72 0.06
8 1.8485 17113.57 -0.05 -675.57 0.06
9 1.8485 17113.43 0.10 -675.63 -0.02
10 1.8485 17113.07 -0.18 -675.56 0.05
11 1.8486 17112.26 -0.28 -675.59 -0.02
12 1.8621 16961.82 0.11 -665.53 0.10
13 1.8623 16959.87 0.06 -665.61 -0.05
14 1.8758 16769.55 0.24 -656.47 -0.02
15 1.8759 16767.89 0.10 -656.42 -0.02
16 1.9331 15592.43 0.01 -629.19 0.10
17 1.9332 15589.40 -0.09 -629.40 -0.12
18 1.9333 15587.06 -0.04 -629.32 -0.05
19 1.9334 15585.04 0.02 -629.20 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.
17BE232 quality flag:3 Type: 5:3EE 5:3EE 5:3EE axisobj 42.177 42.220 42.135 ecceobj 0.160 0.160 0.159 incobj 3.311 3.311 3.311 qmin 34.522 34.390 34.537 qmax 50.574 50.969 50.560 amean 42.328 42.328 42.328 amin 41.883 41.864 41.878 amax 42.843 42.860 42.840 emean 0.167 0.170 0.167 emin 0.151 0.150 0.150 emax 0.182 0.189 0.182 imean 2.259 2.045 2.345 imin 1.594 1.169 1.680 imax 3.080 3.084 3.117 excite_mean 0.172 0.174 0.172 fracstop 1.000 1.000 1.000 cjmean 3.047 3.046 3.047 libcent 0 179.9 179.5 180.8 libamp 0 86.8 100.0 83.3 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 166.3 163.9 150.8 kozaiamp 179.9 180.0 179.9