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: 17BC232
# Created Mon Apr 28 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting 28 observations of 28
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000070 0.022180 -0.000000 0.000202 0.022669 0.000000
# Chi-squared of fit: 16.27 DOF: 50 RMS: 0.13
# Min/Max residuals: -0.50 0.34
# Exact a, adot, b, bdot, g, gdot:
1.423525E-05 2.206564E-02 4.382963E-07 2.054558E-04 2.310073E-02 -1.749040E-04
# Covariance matrix:
3.2267E-13 5.2228E-12 4.3107E-15 8.9821E-15 2.2925E-12 2.0697E-10
5.2228E-12 2.3500E-10 1.5239E-13 2.7611E-13 8.5521E-11 8.5378E-09
4.3107E-15 1.5239E-13 1.3642E-13 -1.6884E-13 5.9781E-14 5.6844E-12
8.9821E-15 2.7611E-13 -1.6884E-13 3.4408E-13 1.1446E-13 1.0502E-11
2.2925E-12 8.5521E-11 5.9781E-14 1.1446E-13 3.2885E-11 3.1682E-09
2.0697E-10 8.5378E-09 5.6844E-12 1.0502E-11 3.1682E-09 3.1250E-07
# lat0 lon0 xBary yBary zBary JD0
1.594446 -175.171283 -0.137651 0.027577 -0.985666 2457480.889049
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 351.30875 +/- 47.376
Argument of Peri: 80.55216 +/- 50.313
Long of Asc Node: 113.68182 +/- 0.054
Inclination: 1.64541 +/- 0.001
Eccentricity: 0.02933148 +/- 0.0037
Semi-Major Axis: 45.59971407 +/- 0.0127
Time of Perihelion: 2460195.8213 +/- 14801.2
Perihelion: 44.26220685 +/- 0.1679
Aphelion: 46.93722129 +/- 0.1680
Period (y) 307.9296 +/- 0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.09301045 +/- 0.0107
Ecliptic Y -3.86533669 +/- 0.0009
Ecliptic Z 1.20453752 +/- 0.0003
Ecliptic XDOT 0.00024157 +/- 0.0001
Ecliptic YDOT -0.00261107 +/- 0.0000
Ecliptic ZDOT 0.00002377 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.27849713 +/- 0.0107
Geocenter to KBO 43.28866876 +/- 0.0107
# Hcoef: 7.56
The following table shows the complete astrometric record for 17BC232. 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 (17BC232) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.388260 12 20 15.41 -00 27 18.2 17BC232 T09 C~83Eq 2016 04 02.490920 12 20 14.96 -00 27 15.4 17BC232 T09 C~83Eq 2016 04 04.34598 12 20 07.15 -00 26 25.0 24.7g 17BC232 T09 C~89UT 2016 04 04.36164 12 20 07.10 -00 26 24.6 24.9g 17BC232 T09 C~89UT 2016 04 04.38727 12 20 07.00 -00 26 24.0 24.8g 17BC232 T09 C~89UT 2016 04 15.26605 12 19 22.55 -00 21 41.2 23.1y 17BC232 T09 C~8COq 2016 04 15.34534 12 19 22.22 -00 21 39.5 23.4y 17BC232 T09 C~8COq 2016 04 15.40543 12 19 21.94 -00 21 38.0 23.3y 17BC232 T09 C~8COq 2016 04 15.43760 12 19 21.83 -00 21 37.3 23.3y 17BC232 T09 C~8COq 2016 04 15.44858 12 19 21.81 -00 21 37.0 23.3y 17BC232 T09 C~8COq 2016 06 04.251947 12 17 08.59 -00 08 29.7 17BC232 T09 C~83Eq 2016 06 04.335164 12 17 08.50 -00 08 29.4 17BC232 T09 C~83Eq 2017 01 23.60759 12 28 47.30 -01 23 07.2 24.0i 17BC232 T09 C~7xTo 2017 01 23.61293 12 28 47.30 -01 23 07.0 23.8i 17BC232 T09 C~7xTo 2017 01 23.61560 12 28 47.30 -01 23 07.0 24.0i 17BC232 T09 C~7xTo 2017 01 23.61828 12 28 47.29 -01 23 06.8 23.9i 17BC232 T09 C~7xTo 2017 01 23.62095 12 28 47.28 -01 23 06.8 23.9i 17BC232 T09 C~7xTo 2017 01 23.64653 12 28 47.23 -01 23 06.5 24.3i 17BC232 T09 C~7xTo 2017 01 28.59194 12 28 39.33 -01 22 04.5 23.9z 17BC232 T09 C~7xTo 2017 01 28.59808 12 28 39.31 -01 22 04.2 24.0z 17BC232 T09 C~7xTo 2017 01 28.60879 12 28 39.30 -01 22 04.0 23.7z 17BC232 T09 C~7xTo 2017 01 28.61418 12 28 39.29 -01 22 04.0 23.9z 17BC232 T09 C~7xTo 2017 01 28.61691 12 28 39.28 -01 22 04.0 23.8z 17BC232 T09 C~7xTo 2017 01 28.61959 12 28 39.28 -01 22 03.9 23.5z 17BC232 T09 C~7xTo 2017 01 28.65069 12 28 39.22 -01 22 03.5 23.7z 17BC232 T09 C~7xTo 2017 02 23.52167 12 27 29.67 -01 13 46.3 24.2r 17BC232 T09 C~7xTo 2017 02 23.56346 12 27 29.52 -01 13 45.4 24.5r 17BC232 T09 C~7xTo 2017 02 23.62726 12 27 29.31 -01 13 43.8 24.3r 17BC232 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 0.18 0.00 -0.06
2 0.0003 -7.31 0.05 -0.10 -0.10
3 0.0054 -134.83 -0.23 -0.27 0.06
4 0.0054 -135.68 0.01 -0.20 0.14
5 0.0055 -137.30 0.18 -0.24 0.12
6 0.0353 -861.52 0.09 -4.90 0.34
7 0.0355 -866.74 0.03 -5.30 0.03
8 0.0356 -871.19 -0.50 -5.59 -0.19
9 0.0357 -872.98 -0.19 -5.60 -0.17
10 0.0358 -873.37 0.13 -5.44 -0.00
11 0.1721 -3020.24 0.11 -74.82 -0.06
12 0.1723 -3021.60 0.14 -75.08 -0.12
13 0.8110 8380.48 0.08 -33.67 -0.16
14 0.8110 8380.40 0.13 -33.49 0.01
15 0.8110 8380.40 0.20 -33.49 0.01
16 0.8110 8380.18 0.05 -33.37 0.13
17 0.8110 8380.04 -0.03 -33.42 0.06
18 0.8111 8379.24 -0.20 -33.45 -0.00
19 0.8247 8245.69 0.09 -23.39 -0.19
20 0.8247 8245.29 -0.11 -23.24 -0.05
21 0.8247 8245.08 0.01 -23.11 0.06
22 0.8247 8244.94 0.04 -23.17 -0.01
23 0.8247 8244.80 -0.01 -23.23 -0.07
24 0.8247 8244.76 0.03 -23.14 0.02
25 0.8248 8243.77 0.02 -23.13 -0.02
26 0.8956 7087.57 -0.16 20.56 0.09
27 0.8958 7085.15 -0.15 20.50 -0.01
28 0.8959 7081.62 0.03 20.72 0.15
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.
17BC232 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.114 45.467 45.057 ecceobj 0.018 0.069 0.027 incobj 1.646 1.647 1.646 qmin 43.617 41.588 43.284 qmax 47.219 50.084 47.455 amean 45.339 45.681 45.287 amin 44.989 45.311 44.929 amax 45.700 46.079 45.649 emean 0.020 0.073 0.026 emin 0.007 0.060 0.013 emax 0.033 0.087 0.040 imean 0.662 0.634 0.681 imin 0.158 0.103 0.168 imax 0.996 0.988 1.014 excite_mean 0.024 0.074 0.030 fracstop 1.000 1.000 1.000 cjmean 3.117 3.115 3.116 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 202.0 167.8 169.0 kozaiamp 180.0 179.9 180.0