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: 17BL233
# Created Fri Nov 1 01:10:30 2024
# Orbit generated from Bernstein formalism
# Fitting 25 observations of 25
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000045 0.020978 -0.000000 -0.000251 0.022289 0.000000
# Chi-squared of fit: 7.66 DOF: 44 RMS: 0.10
# Min/Max residuals: -0.19 0.28
# Exact a, adot, b, bdot, g, gdot:
1.437778E-05 2.085659E-02 -7.456530E-08 -2.495943E-04 2.267849E-02 -6.357578E-04
# Covariance matrix:
3.2974E-13 2.7488E-12 8.5519E-15 -5.4139E-14 1.4280E-12 1.2423E-10
2.7488E-12 2.3007E-10 4.9359E-13 -3.9492E-12 8.5813E-11 8.6913E-09
8.5519E-15 4.9359E-13 2.3759E-13 -2.9187E-13 1.9573E-13 1.9044E-11
-5.4139E-14 -3.9492E-12 -2.9187E-13 5.2157E-13 -1.4869E-12 -1.4984E-10
1.4280E-12 8.5813E-11 1.9573E-13 -1.4869E-12 3.3703E-11 3.3005E-09
1.2423E-10 8.6913E-09 1.9044E-11 -1.4984E-10 3.3005E-09 3.3065E-07
# lat0 lon0 xBary yBary zBary JD0
2.840455 -173.859203 -0.115587 0.049141 -0.987670 2457480.920788
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 226.38763 +/- 28.097
Argument of Peri: 240.74464 +/- 28.013
Long of Asc Node: 82.26968 +/- 0.045
Inclination: 2.86312 +/- 0.001
Eccentricity: 0.03900792 +/- 0.0187
Semi-Major Axis: 43.87242025 +/- 0.0521
Time of Perihelion: 2496874.4924 +/- 8283.8
Perihelion: 42.16104838 +/- 0.8218
Aphelion: 45.58379212 +/- 0.8221
Period (y) 290.6000 +/- 0.52
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -44.76232496 +/- 0.0112
Ecliptic Y -4.93448312 +/- 0.0012
Ecliptic Z 2.18513237 +/- 0.0006
Ecliptic XDOT 0.00034419 +/- 0.0001
Ecliptic YDOT -0.00250240 +/- 0.0000
Ecliptic ZDOT -0.00003389 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.08646873 +/- 0.0111
Geocenter to KBO 44.09464741 +/- 0.0113
# Hcoef: 8.66
The following table shows the complete astrometric record for 17BL233. 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 (17BL233) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.419999 12 27 02.76 +00 10 12.0 17BL233 T09 C~83Eq 2016 04 02.525980 12 27 02.31 +00 10 14.7 17BL233 T09 C~83Eq 2016 04 04.34883 12 26 54.68 +00 11 03.0 25.8g 17BL233 T09 C~89UT 2016 04 04.37012 12 26 54.59 +00 11 03.5 26.0g 17BL233 T09 C~89UT 2016 04 04.41508 12 26 54.41 +00 11 04.6 25.9g 17BL233 T09 C~89UT 2016 06 05.341274 12 23 50.36 +00 28 09.4 17BL233 T09 C~83Eq 2016 06 05.358251 12 23 50.33 +00 28 09.4 17BL233 T09 C~83Eq 2017 01 28.62228 12 35 03.17 -00 44 11.8 25.1z 17BL233 T09 C~7zpa 2017 01 28.64528 12 35 03.13 -00 44 11.4 24.7z 17BL233 T09 C~7zpa 2017 01 28.64799 12 35 03.12 -00 44 11.4 24.4z 17BL233 T09 C~7zpa 2017 01 30.62076 12 34 59.69 -00 43 42.4 24.5z 17BL233 T09 C~7zpa 2017 01 30.62880 12 34 59.67 -00 43 42.4 24.7z 17BL233 T09 C~7zpa 2017 01 30.63152 12 34 59.66 -00 43 42.4 24.2z 17BL233 T09 C~7zpa 2017 01 30.63419 12 34 59.66 -00 43 42.4 24.7z 17BL233 T09 C~7zpa 2017 01 30.66247 12 34 59.60 -00 43 41.9 24.8z 17BL233 T09 C~7zpa 2017 02 02.60942 12 34 53.90 -00 42 55.0 25.1i 17BL233 T09 C~7zpa 2017 02 02.62764 12 34 53.87 -00 42 54.9 25.0i 17BL233 T09 C~7zpa 2017 02 02.63889 12 34 53.84 -00 42 54.7 25.4i 17BL233 T09 C~7zpa 2017 02 02.64725 12 34 53.82 -00 42 54.5 24.9i 17BL233 T09 C~7zpa 2017 02 02.65568 12 34 53.80 -00 42 54.4 25.0i 17BL233 T09 C~7zpa 2017 02 23.52446 12 33 56.76 -00 35 48.6 25.7r 17BL233 T09 C~7zpa 2017 02 23.53862 12 33 56.73 -00 35 48.2 25.3r 17BL233 T09 C~7zpa 2017 02 23.56555 12 33 56.61 -00 35 47.9 25.4r 17BL233 T09 C~7zpa 2017 02 23.60801 12 33 56.47 -00 35 46.9 25.6r 17BL233 T09 C~7zpa 2017 02 23.63774 12 33 56.37 -00 35 46.2 25.9r 17BL233 T09 C~7zpa
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 -0.02
2 0.0003 -7.27 0.11 -0.19 -0.11
3 0.0053 -131.49 -0.13 -1.09 0.04
4 0.0053 -132.93 -0.10 -1.17 -0.01
5 0.0055 -135.84 0.08 -1.22 -0.02
6 0.1750 -3076.99 0.06 -151.74 0.12
7 0.1751 -3077.41 -0.06 -151.91 0.01
8 0.8246 7913.16 -0.00 -148.14 0.06
9 0.8247 7912.45 -0.03 -148.01 0.12
10 0.8247 7912.31 -0.09 -148.07 0.06
11 0.8301 7853.51 0.11 -141.77 0.11
12 0.8301 7853.23 0.09 -141.89 -0.04
13 0.8301 7853.09 0.04 -141.95 -0.10
14 0.8302 7853.09 0.13 -141.95 -0.11
15 0.8302 7852.07 0.01 -141.84 -0.08
16 0.8383 7754.86 -0.13 -132.55 0.13
17 0.8384 7754.40 0.07 -132.64 -0.00
18 0.8384 7753.91 -0.02 -132.63 -0.02
19 0.8384 7753.56 -0.08 -132.57 0.02
20 0.8384 7753.24 -0.09 -132.60 -0.03
21 0.8956 6797.87 -0.07 -79.71 0.12
22 0.8956 6797.29 0.16 -79.52 0.28
23 0.8957 6795.52 -0.09 -79.95 -0.19
24 0.8958 6793.19 -0.01 -79.86 -0.17
25 0.8959 6791.54 0.01 -79.81 -0.17
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.
17BL233 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.422 43.678 43.383 ecceobj 0.045 0.106 0.045 incobj 2.863 2.864 2.863 qmin 40.847 38.597 40.831 qmax 46.603 49.470 46.563 amean 43.638 43.904 43.598 amin 43.299 43.535 43.254 amax 43.993 44.310 43.956 emean 0.044 0.100 0.044 emin 0.024 0.079 0.025 emax 0.060 0.117 0.060 imean 1.188 1.063 1.177 imin 0.294 0.000 0.277 imax 1.829 1.819 1.814 excite_mean 0.050 0.102 0.049 fracstop 1.000 1.000 1.000 cjmean 3.094 3.088 3.094 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 178.9 184.8 179.0 kozaiamp 180.0 180.0 180.0