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 Tue May 7 01:17:24 2024
# Orbit generated from Bernstein formalism
# Fitting 16 observations of 16
# Arc: 31.02d
# First observation: 2017/01/23
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000000 0.023290 0.000000 0.000146 0.023338 0.000000
# WARNING Fitting with energy constraint
# Chi-squared of fit: 3.99 DOF: 27 RMS: 0.09
# Min/Max residuals: -0.23 0.16
# Exact a, adot, b, bdot, g, gdot:
1.488607E-05 2.171379E-02 8.329334E-07 1.853239E-04 2.279278E-02 -3.845303E-03
# Covariance matrix:
2.3404E-13 4.2018E-11 -1.2533E-14 -8.9621E-13 1.8866E-11 5.5672E-09
4.2018E-11 1.4632E-07 -2.3316E-11 -3.8052E-09 4.6821E-08 8.1556E-06
-1.2533E-14 -2.3316E-11 1.3912E-13 -1.4494E-12 -7.7714E-12 -1.5003E-09
-8.9621E-13 -3.8052E-09 -1.4494E-12 1.9498E-10 -1.2045E-09 -2.0315E-07
1.8866E-11 4.6821E-08 -7.7714E-12 -1.2045E-09 1.5256E-08 2.7841E-06
5.5672E-09 8.1556E-06 -1.5003E-09 -2.0315E-07 2.7841E-06 5.6771E-04
# lat0 lon0 xBary yBary zBary JD0
1.583785 -172.843763 0.885391 0.012161 -0.433659 2457777.108391
# Heliocentric elements and errors
Epoch: 2457770.5000 = 2017/01/17
Mean Anomaly: 297.38364 +/- 57.232
Argument of Peri: 156.94724 +/- 42.799
Long of Asc Node: 114.29599 +/- 1.291
Inclination: 1.65114 +/- 0.012
Eccentricity: 0.20198367 +/- 1.1028
Semi-Major Axis: 46.98257932 +/- 19.2515
Time of Perihelion: 2478229.7177 +/- 13840.4
Perihelion: 37.49286567 +/- 54.0439
Aphelion: 56.47229296 +/- 56.7466
Period (y) 322.0427 +/- 197.94
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.05913048 +/- 0.2358
Ecliptic Y -4.64376271 +/- 0.0296
Ecliptic Z 1.21262987 +/- 0.0066
Ecliptic XDOT 0.00078649 +/- 0.0028
Ecliptic YDOT -0.00253703 +/- 0.0004
Ecliptic ZDOT 0.00000943 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 44.31976965 +/- 0.2344
Geocenter to KBO 43.87354067 +/- 0.2378
# Hcoef: 7.63
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.
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 0.04 0.00 -0.15
2 0.0000 -0.08 0.09 0.18 0.03
3 0.0000 -0.08 0.16 0.18 0.03
4 0.0000 -0.30 0.01 0.31 0.15
5 0.0000 -0.43 -0.06 0.25 0.08
6 0.0001 -1.24 -0.23 0.23 0.02
7 0.0136 -134.56 0.08 10.42 -0.18
8 0.0137 -134.95 -0.12 10.58 -0.04
9 0.0137 -135.17 -0.00 10.70 0.07
10 0.0137 -135.31 0.03 10.64 0.00
11 0.0137 -135.45 -0.02 10.59 -0.06
12 0.0137 -135.49 0.02 10.68 0.03
13 0.0138 -136.47 0.01 10.69 -0.01
14 0.0846 -1291.04 -0.07 55.66 0.02
15 0.0848 -1293.47 -0.06 55.59 -0.08
16 0.0849 -1296.99 0.12 55.82 0.09
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:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0