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: 17BA237
# Created Sun Apr 27 01:11:03 2025
# Orbit generated from Bernstein formalism
# Fitting 20 observations of 20
# Arc: 0.99y
# First observation: 2016/04/04
# Last observation: 2017/03/30
Preliminary a, adot, b, bdot, g, gdot:
-0.000024 0.021135 -0.000001 0.000847 0.022291 0.000000
# Chi-squared of fit: 6.73 DOF: 34 RMS: 0.10
# Min/Max residuals: -0.31 0.21
# Exact a, adot, b, bdot, g, gdot:
1.496433E-05 2.105263E-02 4.649801E-07 8.537298E-04 2.266401E-02 6.595105E-04
# Covariance matrix:
3.0658E-13 8.5633E-13 1.7799E-15 3.4019E-14 7.5621E-13 5.3159E-11
8.5633E-13 3.7566E-11 3.5496E-14 9.9990E-13 2.0099E-11 1.6025E-09
1.7799E-15 3.5496E-14 2.5957E-13 -2.9630E-13 2.7140E-14 1.7333E-12
3.4019E-14 9.9990E-13 -2.9630E-13 5.0499E-13 5.7595E-13 4.4065E-11
7.5621E-13 2.0099E-11 2.7140E-14 5.7595E-13 1.2424E-11 9.0711E-10
5.3159E-11 1.6025E-09 1.7333E-12 4.4065E-11 9.0711E-10 7.0220E-08
# lat0 lon0 xBary yBary zBary JD0
3.783893 -173.108450 -0.137473 0.065242 -0.984488 2457482.957879
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 97.85323 +/- 4.345
Argument of Peri: 316.30152 +/- 4.244
Long of Asc Node: 129.03166 +/- 0.024
Inclination: 4.35988 +/- 0.001
Eccentricity: 0.03502841 +/- 0.0122
Semi-Major Axis: 44.84315700 +/- 0.0352
Time of Perihelion: 2427666.8343 +/- 1323.3
Perihelion: 43.27237261 +/- 0.5470
Aphelion: 46.41394139 +/- 0.5472
Period (y) 300.2980 +/- 0.35
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.67526042 +/- 0.0068
Ecliptic Y -5.54035834 +/- 0.0008
Ecliptic Z 2.91186766 +/- 0.0005
Ecliptic XDOT 0.00023312 +/- 0.0000
Ecliptic YDOT -0.00254052 +/- 0.0000
Ecliptic ZDOT 0.00010817 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.11156656 +/- 0.0067
Geocenter to KBO 44.12282280 +/- 0.0069
# Hcoef: 7.81
The following table shows the complete astrometric record for 17BA237. 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 (17BA237) followed by the observatory code and reference code for the source of the astrometry.
2016 04 04.45709 12 31 17.49 +00 44 25.5 25.4g 17BA237 T09 C~89UT 2016 04 04.52379 12 31 17.21 +00 44 27.2 25.4g 17BA237 T09 C~89UT 2016 04 04.55367 12 31 17.08 +00 44 28.0 25.7g 17BA237 T09 C~89UT 2016 04 06.573767 12 31 08.70 +00 45 21.5 17BA237 T09 C~86uk 2016 04 06.582209 12 31 08.67 +00 45 21.7 17BA237 T09 C~86uk 2016 06 05.328496 12 28 11.55 +01 01 33.8 17BA237 T09 C~86uk 2017 01 30.62344 12 39 26.50 -00 07 59.3 23.9z 17BA237 T09 C~81Bp 2017 01 30.63419 12 39 26.48 -00 07 59.1 23.5z 17BA237 T09 C~81Bp 2017 01 30.65979 12 39 26.44 -00 07 58.8 23.3z 17BA237 T09 C~81Bp 2017 02 02.62200 12 39 21.04 -00 07 08.2 24.2i 17BA237 T09 C~81Bp 2017 02 02.66749 12 39 20.94 -00 07 07.4 24.3i 17BA237 T09 C~81Bp 2017 02 21.49546 12 38 32.55 -00 00 29.0 23.7z 17BA237 T09 C~81Bp 2017 02 21.54193 12 38 32.40 -00 00 28.0 23.5z 17BA237 T09 C~81Bp 2017 02 21.56347 12 38 32.32 -00 00 27.4 23.8z 17BA237 T09 C~81Bp 2017 02 21.59307 12 38 32.23 -00 00 26.7 23.7z 17BA237 T09 C~81Bp 2017 02 23.54142 12 38 25.98 +00 00 20.9 24.7r 17BA237 T09 C~85Iq 2017 02 23.57615 12 38 25.86 +00 00 21.7 24.8r 17BA237 T09 C~85Iq 2017 02 23.61010 12 38 25.75 +00 00 22.5 24.9r 17BA237 T09 C~85Iq 2017 03 30.397410 12 36 10.88 +00 16 04.5 17BA237 T09 C~86uk 2017 03 30.426996 12 36 10.78 +00 16 04.9 17BA237 T09 C~86uk
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 -0.06 0.00 0.03
2 0.0002 -4.53 0.01 -0.10 -0.03
3 0.0003 -6.64 -0.05 -0.13 -0.05
4 0.0058 -143.24 0.05 -0.62 0.02
5 0.0058 -143.73 0.13 -0.61 0.03
6 0.1694 -2968.40 -0.07 -156.39 -0.04
7 0.8245 7984.68 -0.07 8.81 0.05
8 0.8246 7984.33 -0.09 8.88 0.07
9 0.8246 7983.66 0.04 8.91 -0.01
10 0.8328 7889.12 -0.10 23.40 0.09
11 0.8329 7887.42 -0.22 23.55 0.04
12 0.8844 7062.13 0.12 102.78 0.14
13 0.8846 7059.67 0.17 102.81 0.02
14 0.8846 7058.33 -0.00 102.89 0.03
15 0.8847 7056.81 0.08 103.00 0.05
16 0.8900 6951.76 0.06 109.68 -0.04
17 0.8901 6949.79 0.02 109.71 -0.12
18 0.8902 6947.95 0.08 109.79 -0.13
19 0.9855 4715.52 -0.31 175.80 0.04
20 0.9855 4713.98 0.21 175.58 -0.18
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.
17BA237 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.384 44.572 44.288 ecceobj 0.039 0.070 0.021 incobj 4.366 4.368 4.365 qmin 41.877 40.651 42.724 qmax 47.561 49.134 46.454 amean 44.600 44.783 44.510 amin 44.252 44.429 44.174 amax 44.976 45.164 44.860 emean 0.043 0.074 0.023 emin 0.029 0.060 0.007 emax 0.057 0.088 0.036 imean 3.200 3.214 3.189 imin 2.696 2.692 2.692 imax 3.749 3.784 3.740 excite_mean 0.071 0.093 0.060 fracstop 1.000 1.000 1.000 cjmean 3.103 3.101 3.103 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 174.4 173.8 176.3 kozaiamp 180.0 180.0 180.0