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: 17BK232
# Created Fri Nov 22 02:10:48 2024
# 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:
-0.000038 0.022658 0.000006 -0.007226 0.023564 0.000000
# Chi-squared of fit: 10.28 DOF: 38 RMS: 0.12
# Min/Max residuals: -0.29 0.28
# Exact a, adot, b, bdot, g, gdot:
1.433331E-05 2.261869E-02 -4.618369E-06 -7.272317E-03 2.391057E-02 -2.083323E-03
# Covariance matrix:
2.6188E-13 1.3515E-12 3.4271E-14 -4.2705E-13 8.3202E-13 6.3593E-11
1.3515E-12 2.0023E-10 3.4990E-12 -4.5922E-11 6.8001E-11 6.8297E-09
3.4271E-14 3.4990E-12 2.0700E-13 -1.0047E-12 1.2121E-12 1.2037E-10
-4.2705E-13 -4.5922E-11 -1.0047E-12 1.1100E-11 -1.5842E-11 -1.5775E-09
8.3202E-13 6.8001E-11 1.2121E-12 -1.5842E-11 2.4042E-11 2.3564E-09
6.3593E-11 6.8297E-09 1.2037E-10 -1.5775E-09 2.3564E-09 2.3462E-07
# lat0 lon0 xBary yBary zBary JD0
1.725733 -175.479906 -0.142990 0.029812 -0.984842 2457480.890761
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 320.09402 +/- 4.902
Argument of Peri: 224.16531 +/- 7.044
Long of Asc Node: 9.95478 +/- 0.001
Inclination: 17.85997 +/- 0.003
Eccentricity: 0.11840526 +/- 0.0164
Semi-Major Axis: 46.74765232 +/- 0.1716
Time of Perihelion: 2470421.6710 +/- 1587.9
Perihelion: 41.21248446 +/- 0.7801
Aphelion: 52.28282017 +/- 0.7889
Period (y) 319.6303 +/- 1.76
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.64820663 +/- 0.0085
Ecliptic Y -3.51732179 +/- 0.0007
Ecliptic Z 1.25932132 +/- 0.0002
Ecliptic XDOT 0.00041692 +/- 0.0001
Ecliptic YDOT -0.00257204 +/- 0.0000
Ecliptic ZDOT -0.00083951 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.81152849 +/- 0.0085
Geocenter to KBO 41.82250688 +/- 0.0086
# Hcoef: 8.28
The following table shows the complete astrometric record for 17BK232. 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 (17BK232) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.389972 12 19 19.93 -00 12 44.0 17BK232 T09 C~83Eq 2016 04 02.515196 12 19 19.36 -00 12 41.0 17BK232 T09 C~83Eq 2016 04 04.34598 12 19 11.17 -00 11 56.6 25.0g 17BK232 T09 C~89UT 2016 04 04.36164 12 19 11.09 -00 11 56.4 25.2g 17BK232 T09 C~89UT 2016 04 04.38727 12 19 10.99 -00 11 55.8 25.1g 17BK232 T09 C~89UT 2016 04 04.41295 12 19 10.88 -00 11 55.1 25.2g 17BK232 T09 C~89UT 2016 06 04.25196 12 16 00.04 +00 02 33.4 24.8z 17BK232 T09 C~8COq 2016 06 04.27037 12 16 00.02 +00 02 33.2 24.0z 17BK232 T09 C~8COq 2016 06 04.28656 12 16 00.02 +00 02 33.6 24.1z 17BK232 T09 C~8COq 2016 06 04.30544 12 15 59.96 +00 02 33.4 24.1z 17BK232 T09 C~8COq 2016 06 04.32707 12 15 59.95 +00 02 33.4 24.6z 17BK232 T09 C~8COq 2016 06 04.33517 12 15 59.96 +00 02 33.4 24.3z 17BK232 T09 C~8COq 2016 06 05.339160 12 15 58.85 +00 02 33.7 17BK232 T09 C~83Eq 2017 01 23.61293 12 27 36.09 -01 29 28.6 24.6i 17BK232 T09 C~7xTo 2017 01 23.61560 12 27 36.08 -01 29 28.6 24.4i 17BK232 T09 C~7xTo 2017 01 23.61828 12 27 36.08 -01 29 28.6 24.4i 17BK232 T09 C~7xTo 2017 01 23.62095 12 27 36.06 -01 29 28.6 24.7i 17BK232 T09 C~7xTp 2017 01 28.59194 12 27 27.13 -01 28 43.6 24.3z 17BK232 T09 C~7xTp 2017 01 28.60879 12 27 27.09 -01 28 43.3 24.2z 17BK232 T09 C~7xTp 2017 01 28.61418 12 27 27.08 -01 28 43.1 24.9z 17BK232 T09 C~7xTp 2017 02 23.521659 12 26 11.34 -01 21 50.2 17BK232 T09 C~83Eq 2017 02 23.595374 12 26 11.05 -01 21 48.7 17BK232 T09 C~83Eq
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 0.13 0.00 -0.04
2 0.0003 -9.04 0.16 -0.64 -0.06
3 0.0054 -139.42 -0.16 -8.59 0.12
4 0.0054 -140.60 -0.21 -8.88 -0.10
5 0.0055 -142.22 0.02 -8.93 -0.01
6 0.0055 -144.01 0.07 -8.94 0.10
7 0.1721 -3116.55 -0.10 -346.86 -0.02
8 0.1722 -3116.75 0.02 -347.16 -0.20
9 0.1722 -3116.91 0.13 -346.80 0.28
10 0.1723 -3117.65 -0.29 -347.34 -0.13
11 0.1723 -3117.79 -0.06 -347.40 -0.05
12 0.1723 -3117.65 0.21 -347.34 0.06
13 0.1751 -3133.06 0.09 -353.66 0.00
14 0.8110 8662.21 0.05 -1278.76 0.15
15 0.8110 8662.07 -0.02 -1278.82 0.10
16 0.8110 8662.07 0.05 -1278.82 0.11
17 0.8110 8661.79 -0.15 -1278.94 -0.01
18 0.8246 8520.77 0.10 -1290.65 -0.10
19 0.8247 8520.10 -0.02 -1290.61 -0.02
20 0.8247 8519.88 -0.06 -1290.49 0.12
21 0.8956 7311.68 0.08 -1361.15 -0.11
22 0.8958 7307.09 -0.05 -1361.50 -0.19
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.
17BK232 quality flag:2 Type: SCATEXTD SCATNEAR SCATEXTD axisobj 46.289 47.177 46.048 ecceobj 0.117 0.190 0.079 incobj 17.953 17.966 17.946 qmin 40.220 37.710 41.646 qmax 53.133 57.713 51.135 amean 46.532 47.447 46.275 amin 46.137 47.015 45.914 amax 46.954 47.998 46.661 emean 0.119 0.182 0.085 emin 0.107 0.163 0.073 emax 0.132 0.202 0.096 imean 18.030 18.149 17.981 imin 17.710 17.629 17.719 imax 18.351 18.736 18.261 excite_mean 0.332 0.361 0.320 fracstop 1.000 1.000 1.000 cjmean 2.994 2.980 3.000 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 187.1 182.3 184.1 kozaiamp 179.8 180.0 180.0