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 Jul 17 01:11:27 2024
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 4.96y
# First observation: 2016/04/02
# Last observation: 2021/03/17
Preliminary a, adot, b, bdot, g, gdot:
-0.000241 0.016408 0.000036 -0.001581 0.018689 0.000000
# Chi-squared of fit: 6.14 DOF: 32 RMS: 0.10
# Min/Max residuals: -0.28 0.24
# Exact a, adot, b, bdot, g, gdot:
1.270169E-05 1.574895E-02 -9.962186E-07 -1.524772E-03 1.910603E-02 -6.513274E-03
# Covariance matrix:
4.9295E-13 -9.4054E-13 -4.1542E-14 7.8592E-14 9.6045E-14 -9.6382E-12
-9.4054E-13 2.6380E-12 1.1710E-13 -2.2791E-13 -6.2216E-13 2.8031E-11
-4.1542E-14 1.1710E-13 1.4436E-13 -7.7089E-14 -2.4978E-14 1.2819E-12
7.8592E-14 -2.2791E-13 -7.7089E-14 9.2325E-14 5.3262E-14 -2.4913E-12
9.6045E-14 -6.2216E-13 -2.4978E-14 5.3262E-14 3.8896E-13 -6.6085E-12
-9.6382E-12 2.8031E-11 1.2819E-12 -2.4913E-12 -6.6085E-12 3.0637E-10
# lat0 lon0 xBary yBary zBary JD0
1.682313 -174.497532 -0.125958 0.029134 -0.987182 2457480.883912
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 304.85052 +/- 0.076
Argument of Peri: 263.16867 +/- 0.017
Long of Asc Node: 22.22780 +/- 0.003
Inclination: 5.76535 +/- 0.001
Eccentricity: 0.38609916 +/- 0.0010
Semi-Major Axis: 58.54007906 +/- 0.0375
Time of Perihelion: 2482542.5924 +/- 24.4
Perihelion: 35.93780387 +/- 0.0627
Aphelion: 81.14235425 +/- 0.0781
Period (y) 447.9073 +/- 0.43
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -53.05056891 +/- 0.0017
Ecliptic Y -5.23938562 +/- 0.0002
Ecliptic Z 1.53653639 +/- 0.0001
Ecliptic XDOT 0.00113876 +/- 0.0000
Ecliptic YDOT -0.00216453 +/- 0.0000
Ecliptic ZDOT -0.00024580 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 53.33080693 +/- 0.0017
Geocenter to KBO 52.33951020 +/- 0.0017
# Hcoef: 5.99
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.
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 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 0.07 0.00 -0.05
2 0.0004 -7.94 -0.03 -0.16 -0.02
3 0.1750 -2639.76 -0.08 -127.15 -0.10
4 0.1751 -2640.07 0.03 -127.17 -0.04
5 0.8110 6538.32 0.04 -314.42 0.11
6 0.8110 6538.19 0.08 -314.48 0.04
7 0.8110 6538.19 0.14 -314.48 0.04
8 0.8111 6537.77 -0.22 -314.66 -0.14
9 0.8247 6420.37 -0.11 -310.72 -0.10
10 0.8247 6420.37 0.06 -310.72 -0.10
11 0.8247 6419.94 0.06 -310.47 0.15
12 0.8247 6419.66 -0.07 -310.59 0.02
13 0.8248 6418.91 0.03 -310.36 0.24
14 0.8957 5427.38 0.07 -298.66 0.07
15 0.8958 5424.96 -0.28 -298.73 0.02
16 0.8959 5423.56 0.01 -298.89 -0.14
17 0.8959 5422.18 0.11 -298.72 0.04
18 0.9905 3486.13 0.09 -312.85 -0.01
19 4.9551 17842.96 -0.00 -1614.55 -0.03
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:2 Type: SCATNEAR SCATNEAR 8:3EEEEE axisobj 57.720 57.820 57.622 ecceobj 0.385 0.388 0.382 incobj 5.801 5.801 5.801 qmin 35.149 35.071 35.175 qmax 82.418 83.711 82.172 amean 57.901 58.512 57.901 amin 57.000 57.509 57.076 amax 59.063 59.770 58.959 emean 0.380 0.386 0.382 emin 0.366 0.371 0.371 emax 0.395 0.401 0.394 imean 6.077 5.863 5.714 imin 5.414 5.205 5.517 imax 6.770 6.793 5.900 excite_mean 0.395 0.400 0.394 fracstop 1.000 1.000 1.000 cjmean 3.070 3.072 3.071 libcent 0 -180.0 -180.0 180.3 libamp 0 -180.0 -180.0 130.9 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 179.2 180.9 190.1 kozaiamp 180.0 179.9 180.0