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: 17BY244
# Created Mon Apr 28 01:11:04 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 18
# Arc: 3.00y
# First observation: 2016/04/02
# Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
-0.000095 0.024217 -0.000002 -0.000062 0.024017 0.000000
# Chi-squared of fit: 13.77 DOF: 30 RMS: 0.15
# Min/Max residuals: -0.33 0.31
# Exact a, adot, b, bdot, g, gdot:
1.540397E-05 2.403748E-02 3.171675E-09 -6.307351E-05 2.446051E-02 -1.496622E-03
# Covariance matrix:
6.3137E-13 -1.9765E-12 6.4395E-15 3.1625E-15 1.9379E-13 -2.4312E-11
-1.9765E-12 8.2303E-12 -3.2666E-14 -1.2304E-14 -1.1320E-12 1.0505E-10
6.4395E-15 -3.2666E-14 1.7661E-13 -1.0642E-13 7.6666E-15 -4.1919E-13
3.1625E-15 -1.2304E-14 -1.0642E-13 1.2094E-13 7.9377E-16 -1.6057E-13
1.9379E-13 -1.1320E-12 7.6666E-15 7.9377E-16 3.4907E-13 -1.4420E-11
-2.4312E-11 1.0505E-10 -4.1919E-13 -1.6057E-13 -1.4420E-11 1.3612E-09
# lat0 lon0 xBary yBary zBary JD0
2.091276 -175.352550 -0.141226 0.036102 -0.984894 2457480.915394
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 303.23806 +/- 0.624
Argument of Peri: 157.99110 +/- 0.813
Long of Asc Node: 90.35748 +/- 0.023
Inclination: 2.04816 +/- 0.000
Eccentricity: 0.06731130 +/- 0.0013
Semi-Major Axis: 43.32484469 +/- 0.0062
Time of Perihelion: 2473903.7339 +/- 180.6
Perihelion: 40.40859307 +/- 0.0556
Aphelion: 46.24109632 +/- 0.0557
Period (y) 285.1765 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.69525705 +/- 0.0010
Ecliptic Y -3.53353924 +/- 0.0001
Ecliptic Z 1.49188061 +/- 0.0000
Ecliptic XDOT 0.00038470 +/- 0.0000
Ecliptic YDOT -0.00267509 +/- 0.0000
Ecliptic ZDOT -0.00001316 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.87130363 +/- 0.0010
Geocenter to KBO 40.88222123 +/- 0.0010
# Hcoef: 9.18
The following table shows the complete astrometric record for 17BY244. 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 (17BY244) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.414605 12 20 22.76 +00 04 22.4 17BY244 T09 C~89UU 2016 04 02.469027 12 20 22.52 +00 04 24.0 17BY244 T09 C~89UU 2016 06 05.317193 12 17 05.18 +00 23 32.2 17BY244 T09 C~89UU 2016 06 05.33917 12 17 05.14 +00 23 31.9 25.8r 17BY244 T09 C~8COq 2016 06 05.356114 12 17 05.13 +00 23 31.9 17BY244 T09 C~89UU 2017 01 23.60759 12 29 30.51 -00 56 37.4 25.6i 17BY244 T09 C~89UU 2017 01 23.62095 12 29 30.48 -00 56 37.6 25.1i 17BY244 T09 C~89UU 2017 01 23.64653 12 29 30.45 -00 56 36.9 25.3i 17BY244 T09 C~89UU 2017 01 28.59808 12 29 22.23 -00 55 29.9 25.2z 17BY244 T09 C~89UU 2017 01 28.60345 12 29 22.21 -00 55 29.7 25.1z 17BY244 T09 C~89UU 2017 01 28.61691 12 29 22.21 -00 55 29.4 25.4z 17BY244 T09 C~89UU 2017 01 28.65069 12 29 22.16 -00 55 28.9 24.7z 17BY244 T09 C~89UU 2017 02 01.662482 12 29 13.97 -00 54 25.2 17BY244 T09 C~89UU 2017 02 02.636127 12 29 11.82 -00 54 08.7 17BY244 T09 C~89UU 2017 02 23.521659 12 28 09.32 -00 46 38.0 17BY244 T09 C~89UU 2017 02 23.605904 12 28 09.00 -00 46 35.7 17BY244 T09 C~89UU 2019 04 03.440043 12 35 37.03 -01 34 57.1 17BY244 T09 C~89UU 2019 04 03.464217 12 35 36.92 -01 34 56.4 17BY244 T09 C~89UU
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 0.03 0.00 -0.01
2 0.0001 -3.94 0.10 0.04 0.08
3 0.1750 -3176.91 -0.02 -119.37 0.12
4 0.1750 -3177.34 -0.11 -119.89 -0.32
5 0.1751 -3177.48 0.01 -119.95 -0.33
6 0.8109 8999.29 -0.10 -103.41 0.29
7 0.8110 8998.95 -0.09 -103.77 -0.10
8 0.8110 8998.26 -0.12 -103.31 0.31
9 0.8246 8858.26 -0.05 -90.62 -0.16
10 0.8246 8857.90 -0.23 -90.56 -0.10
11 0.8246 8857.79 0.09 -90.28 0.15
12 0.8247 8856.90 0.31 -90.12 0.24
13 0.8357 8718.63 -0.18 -80.29 -0.03
14 0.8384 8682.42 0.13 -77.92 -0.05
15 0.8956 7641.53 0.20 -35.51 -0.03
16 0.8958 7636.21 0.04 -35.30 0.08
17 3.0008 14977.61 -0.00 -38.79 -0.07
18 3.0008 14975.81 0.01 -38.80 -0.06
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.
17BY244 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.868 42.898 42.839 ecceobj 0.062 0.059 0.065 incobj 2.048 2.048 2.048 qmin 39.796 39.948 39.629 qmax 46.586 46.435 46.693 amean 43.081 43.111 43.052 amin 42.750 42.777 42.722 amax 43.430 43.458 43.405 emean 0.053 0.050 0.056 emin 0.032 0.030 0.035 emax 0.073 0.069 0.076 imean 1.012 0.980 1.049 imin 0.515 0.526 0.493 imax 1.444 1.377 1.537 excite_mean 0.056 0.053 0.060 fracstop 1.000 1.000 1.000 cjmean 3.087 3.088 3.086 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 178.1 182.1 175.8 kozaiamp 180.0 180.0 179.9