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: 17BJ239
# Created Sun Dec 22 02:10:55 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 38 observations of 38
# Arc: 5.10y
# First observation: 2014/02/27
# Last observation: 2019/04/03
# Chi-squared of fit: 24.39 DOF: 70 RMS: 0.14
# Min/Max residuals: -0.34 0.43
# Exact a, adot, b, bdot, g, gdot:
1.331679E-05 2.042571E-02 6.778261E-06 8.327075E-03 2.352134E-02 -1.609728E-04
# Covariance matrix:
6.5077E-13 -3.9758E-13 1.3012E-13 -1.1680E-13 -9.4911E-14 -2.7434E-12
-3.9758E-13 3.1874E-13 -1.3012E-13 1.1709E-13 1.4317E-13 2.7485E-12
1.3012E-13 -1.3012E-13 4.1194E-13 -1.7675E-13 -7.5368E-14 -1.3231E-12
-1.1680E-13 1.1709E-13 -1.7675E-13 9.7593E-14 6.8597E-14 1.1915E-12
-9.4911E-14 1.4317E-13 -7.5368E-14 6.8597E-14 2.1351E-13 1.6055E-12
-2.7434E-12 2.7485E-12 -1.3231E-12 1.1915E-12 1.6055E-12 2.7962E-11
# lat0 lon0 xBary yBary zBary JD0
1.744480 -176.822229 0.410059 0.027481 -0.898954 2456715.966852
# Heliocentric elements and errors
Epoch: 2456716.5000 = 2014/02/28
Mean Anomaly: 205.13775 +/- 0.348
Argument of Peri: 160.97501 +/- 0.348
Long of Asc Node: 178.45016 +/- 0.000
Inclination: 22.23684 +/- 0.001
Eccentricity: 0.03396870 +/- 0.0001
Semi-Major Axis: 42.11326471 +/- 0.0026
Time of Perihelion: 2499657.2739 +/- 96.8
Perihelion: 40.68273200 +/- 0.0055
Aphelion: 43.54379742 +/- 0.0056
Period (y) 273.2981 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -43.35154718 +/- 0.0008
Ecliptic Y -1.99453379 +/- 0.0001
Ecliptic Z 1.29452448 +/- 0.0000
Ecliptic XDOT 0.00017419 +/- 0.0000
Ecliptic YDOT -0.00237415 +/- 0.0000
Ecliptic ZDOT 0.00096837 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.41671759 +/- 0.0008
Geocenter to KBO 42.51462117 +/- 0.0008
# Hcoef: 8.85
The following table shows the complete astrometric record for 17BJ239. 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 (17BJ239) followed by the observatory code and reference code for the source of the astrometry.
2014 02 27.466074 12 14 26.15 +00 20 14.9 17BJ239 T09 C~89UT 2014 02 27.481710 12 14 26.09 +00 20 15.3 17BJ239 T09 C~89UT 2016 04 02.41732 12 22 11.74 +00 35 35.6 24.8i 17BJ239 T09 C~89UT 2016 04 02.44189 12 22 11.62 +00 35 36.5 24.6i 17BJ239 T09 C~89UT 2016 04 02.52328 12 22 11.27 +00 35 39.2 24.8i 17BJ239 T09 C~89UT 2016 04 02.52599 12 22 11.27 +00 35 39.0 24.7i 17BJ239 T09 C~89UT 2016 04 04.35736 12 22 03.49 +00 36 37.8 26.2g 17BJ239 T09 C~89UT 2016 04 04.39588 12 22 03.34 +00 36 38.8 26.0g 17BJ239 T09 C~89UT 2016 04 04.41295 12 22 03.26 +00 36 39.6 25.9g 17BJ239 T09 C~89UT 2016 04 04.41508 12 22 03.25 +00 36 39.6 25.5g 17BJ239 T09 C~89UT 2016 04 04.41948 12 22 03.23 +00 36 39.8 25.7g 17BJ239 T09 C~89UT 2016 04 05.438298 12 21 58.92 +00 37 12.1 17BJ239 T09 C~89UT 2016 04 05.556253 12 21 58.41 +00 37 15.8 17BJ239 T09 C~89UT 2016 06 04.26227 12 19 02.61 +00 58 40.2 25.3z 17BJ239 T09 C~89UT 2016 06 04.28926 12 19 02.57 +00 58 40.6 25.0z 17BJ239 T09 C~89UT 2016 06 04.34327 12 19 02.54 +00 58 41.4 24.8z 17BJ239 T09 C~89UT 2016 06 05.317193 12 19 01.57 +00 58 48.2 17BJ239 T09 C~89UT 2016 06 05.356114 12 19 01.54 +00 58 48.5 17BJ239 T09 C~89UT 2017 01 23.62432 12 31 07.94 +00 00 32.1 24.9i 17BJ239 T09 C~85Ir 2017 01 23.63041 12 31 07.94 +00 00 32.3 25.0i 17BJ239 T09 C~85Ir 2017 01 23.63574 12 31 07.93 +00 00 32.5 25.1i 17BJ239 T09 C~85Ir 2017 01 23.64112 12 31 07.93 +00 00 32.5 24.7i 17BJ239 T09 C~85Ir 2017 01 23.65191 12 31 07.92 +00 00 32.6 25.2i 17BJ239 T09 C~85Ir 2017 01 23.65460 12 31 07.92 +00 00 32.8 25.4i 17BJ239 T09 C~85Ir 2017 01 28.59538 12 31 00.33 +00 02 07.9 25.3z 17BJ239 T09 C~85Ir 2017 01 28.60076 12 31 00.33 +00 02 07.9 24.9z 17BJ239 T09 C~85Ir 2017 01 28.60612 12 31 00.30 +00 02 07.9 25.3z 17BJ239 T09 C~85Ir 2017 01 28.61148 12 31 00.31 +00 02 08.2 25.1z 17BJ239 T09 C~85Ir 2017 01 28.62228 12 31 00.28 +00 02 08.4 24.7z 17BJ239 T09 C~85Ir 2017 01 28.63916 12 31 00.26 +00 02 08.7 25.0z 17BJ239 T09 C~85Ir 2017 02 01.64893 12 30 52.67 +00 03 34.4 25.3i 17BJ239 T09 C~85Ir 2017 02 01.65978 12 30 52.63 +00 03 34.7 24.9i 17BJ239 T09 C~85Ir 2017 02 23.53583 12 29 51.55 +00 13 14.9 24.9r 17BJ239 T09 C~85Ir 2017 02 23.57406 12 29 51.44 +00 13 15.9 25.2r 17BJ239 T09 C~85Ir 2017 02 23.60592 12 29 51.32 +00 13 17.0 25.6r 17BJ239 T09 C~85Ir 2017 02 23.64828 12 29 51.17 +00 13 18.2 24.9r 17BJ239 T09 C~85Ir 2019 04 03.448087 12 37 26.56 +00 30 34.0 17BJ239 T09 C~89UT 2019 04 03.480310 12 37 26.40 +00 30 34.9 17BJ239 T09 C~89UT
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 -0.02 0.00 -0.26
2 0.0000 0.00 -0.01 0.00 -0.34
3 2.0943 0.00 -0.05 0.00 0.12
4 2.0944 0.00 -0.25 0.00 0.23
5 2.0946 0.00 -0.21 0.00 0.31
6 2.0946 0.00 -0.03 0.00 0.03
7 2.0996 0.00 -0.09 0.00 0.14
8 2.0997 0.00 0.15 0.00 -0.09
9 2.0998 0.00 0.06 0.00 0.17
10 2.0998 0.00 0.05 0.00 0.10
11 2.0998 0.00 0.03 0.00 0.16
12 2.1026 0.00 0.10 0.00 0.05
13 2.1029 0.00 0.04 0.00 0.01
14 2.2664 0.00 -0.01 0.00 -0.15
15 2.2665 0.00 -0.16 0.00 0.05
16 2.2666 0.00 0.28 0.00 0.43
17 2.2693 0.00 0.06 0.00 0.04
18 2.2694 0.00 0.20 0.00 0.07
19 2.9053 0.00 -0.15 0.00 -0.06
20 2.9053 0.00 -0.02 0.00 0.03
21 2.9053 0.00 -0.06 0.00 0.14
22 2.9053 0.00 0.05 0.00 0.04
23 2.9054 0.00 0.13 0.00 -0.06
24 2.9054 0.00 0.19 0.00 0.10
25 2.9189 0.00 -0.08 0.00 0.04
26 2.9189 0.00 0.06 0.00 -0.07
27 2.9189 0.00 -0.24 0.00 -0.18
28 2.9189 0.00 0.06 0.00 0.01
29 2.9190 0.00 -0.10 0.00 -0.01
30 2.9190 0.00 0.06 0.00 -0.06
31 2.9300 0.00 0.07 0.00 -0.16
32 2.9300 0.00 -0.19 0.00 -0.10
33 2.9899 0.00 -0.28 0.00 -0.04
34 2.9900 0.00 0.10 0.00 -0.19
35 2.9901 0.00 -0.02 0.00 -0.05
36 2.9902 0.00 -0.03 0.00 -0.12
37 5.0951 0.00 0.16 0.00 -0.03
38 5.0952 0.00 -0.12 0.00 -0.17
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.
17BJ239 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.865 41.865 41.865 ecceobj 0.040 0.040 0.040 incobj 22.322 22.322 22.322 qmin 39.711 39.711 39.711 qmax 44.507 44.507 44.507 amean 42.040 42.040 42.040 amin 41.725 41.725 41.724 amax 42.362 42.362 42.362 emean 0.039 0.039 0.039 emin 0.029 0.029 0.029 emax 0.051 0.051 0.051 imean 22.088 22.088 22.088 imin 21.684 21.684 21.684 imax 22.474 22.474 22.474 excite_mean 0.378 0.378 0.378 fracstop 1.000 1.000 1.000 cjmean 2.904 2.904 2.904 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 178.2 178.3 178.3 kozaiamp 180.0 180.0 180.0