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: 17BM235
# Created Mon Apr 28 01:11:03 2025
# Orbit generated from Bernstein formalism
# Fitting 19 observations of 19
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000042 0.024682 -0.000001 -0.001226 0.024068 0.000000
# Chi-squared of fit: 5.66 DOF: 32 RMS: 0.10
# Min/Max residuals: -0.19 0.16
# Exact a, adot, b, bdot, g, gdot:
1.542826E-05 2.465975E-02 -1.485537E-06 -1.234487E-03 2.450913E-02 1.176211E-03
# Covariance matrix:
3.3620E-13 4.3050E-12 1.5427E-14 -2.0710E-13 1.9178E-12 1.5965E-10
4.3050E-12 5.1313E-10 1.4768E-12 -2.2052E-11 1.7876E-10 1.6810E-08
1.5427E-14 1.4768E-12 2.4146E-13 -3.5151E-13 5.2697E-13 4.8770E-11
-2.0710E-13 -2.2052E-11 -3.5151E-13 1.4717E-12 -7.7420E-12 -7.2462E-10
1.9178E-12 1.7876E-10 5.2697E-13 -7.7420E-12 6.4063E-11 5.9112E-09
1.5965E-10 1.6810E-08 4.8770E-11 -7.2462E-10 5.9112E-09 5.5264E-07
# lat0 lon0 xBary yBary zBary JD0
2.506036 -174.299508 -0.122722 0.043340 -0.987072 2457480.894196
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 28.66561 +/- 12.270
Argument of Peri: 104.87648 +/- 15.609
Long of Asc Node: 46.34517 +/- 0.025
Inclination: 3.76599 +/- 0.002
Eccentricity: 0.09655522 +/- 0.0190
Semi-Major Axis: 45.53893029 +/- 0.1859
Time of Perihelion: 2448542.6844 +/- 3825.4
Perihelion: 41.14190889 +/- 0.8819
Aphelion: 49.93595168 +/- 0.8895
Period (y) 307.3141 +/- 1.88
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.53518198 +/- 0.0132
Ecliptic Y -4.27175633 +/- 0.0013
Ecliptic Z 1.78397718 +/- 0.0006
Ecliptic XDOT 0.00013711 +/- 0.0001
Ecliptic YDOT -0.00276167 +/- 0.0000
Ecliptic ZDOT -0.00013202 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.79236556 +/- 0.0132
Geocenter to KBO 40.80112590 +/- 0.0133
# Hcoef: 8.98
The following table shows the complete astrometric record for 17BM235. 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 (17BM235) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.393407 12 24 54.06 +00 02 12.8 17BM235 T09 C~83Eq 2016 04 02.444565 12 24 53.83 +00 02 14.2 17BM235 T09 C~83Eq 2016 04 04.37012 12 24 45.22 +00 03 07.1 25.5g 17BM235 T09 C~89UT 2016 04 04.38940 12 24 45.14 +00 03 07.6 26.1g 17BM235 T09 C~89UT 2016 04 04.41508 12 24 45.03 +00 03 08.3 25.9g 17BM235 T09 C~89UT 2016 06 05.311488 12 21 32.01 +00 20 41.5 17BM235 T09 C~83Eq 2016 06 05.358251 12 21 31.96 +00 20 41.6 17BM235 T09 C~83Eq 2017 01 28.62228 12 33 50.90 -01 01 11.0 24.8z 17BM235 T09 C~7zpg 2017 01 28.64259 12 33 50.87 -01 01 10.6 24.7z 17BM235 T09 C~7zpg 2017 01 28.64528 12 33 50.87 -01 01 10.6 24.8z 17BM235 T09 C~7zpg 2017 01 28.65069 12 33 50.86 -01 01 10.5 24.2z 17BM235 T09 C~7zpg 2017 01 28.65605 12 33 50.85 -01 01 10.6 24.8z 17BM235 T09 C~7zpg 2017 02 02.60942 12 33 41.07 -00 59 54.9 25.1i 17BM235 T09 C~7zpg 2017 02 02.61925 12 33 41.05 -00 59 54.5 25.3i 17BM235 T09 C~7zpg 2017 02 02.62764 12 33 41.02 -00 59 54.4 24.8i 17BM235 T09 C~7zpg 2017 02 02.63614 12 33 41.00 -00 59 54.4 24.6i 17BM235 T09 C~7zpg 2017 02 23.52446 12 32 40.14 -00 52 41.1 25.5r 17BM235 T09 C~7zpg 2017 02 23.56555 12 32 39.99 -00 52 40.0 25.8r 17BM235 T09 C~7zpg 2017 02 23.60801 12 32 39.84 -00 52 38.8 25.6r 17BM235 T09 C~7zpg
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 0.10 0.00 0.14
2 0.0001 -3.72 0.15 -0.08 0.14
3 0.0054 -143.26 -0.19 -2.62 -0.16
4 0.0055 -144.56 -0.08 -2.63 -0.14
5 0.0055 -146.36 0.01 -2.64 -0.11
6 0.1750 -3222.32 -0.02 -181.40 0.07
7 0.1751 -3223.05 0.03 -181.60 0.07
8 0.8247 8905.67 -0.10 -307.16 -0.07
9 0.8248 8905.10 -0.04 -306.97 0.08
10 0.8248 8905.10 0.05 -306.97 0.07
11 0.8248 8904.92 0.04 -306.94 0.09
12 0.8248 8904.82 0.11 -307.09 -0.07
13 0.8384 8739.86 0.09 -295.56 -0.07
14 0.8384 8739.43 0.03 -295.31 0.16
15 0.8384 8738.97 -0.11 -295.40 0.06
16 0.8384 8738.70 -0.07 -295.52 -0.08
17 0.8956 7727.36 0.02 -258.54 -0.18
18 0.8957 7724.85 -0.02 -258.42 -0.09
19 0.8959 7722.31 -0.01 -258.21 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.
17BM235 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.043 46.108 44.646 ecceobj 0.088 0.160 0.064 incobj 3.776 3.771 3.780 qmin 40.253 37.806 41.168 qmax 50.573 55.190 48.804 amean 45.259 46.313 44.875 amin 44.901 45.917 44.521 amax 45.649 46.769 45.246 emean 0.093 0.165 0.065 emin 0.079 0.151 0.051 emax 0.108 0.181 0.079 imean 2.946 3.048 2.886 imin 2.374 2.327 2.334 imax 3.480 3.756 3.386 excite_mean 0.106 0.174 0.082 fracstop 1.000 1.000 1.000 cjmean 3.103 3.093 3.104 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 182.5 183.0 186.2 kozaiamp 180.0 180.0 180.0