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: 17QQ131 # Created Wed May 8 01:18:11 2024 # Orbit generated from Bernstein formalism # Fitting 9 observations of 9 # Arc: 4.96y # First observation: 2013/09/29 # Last observation: 2018/09/14 Preliminary a, adot, b, bdot, g, gdot: -0.000140 0.024269 -0.000006 0.000894 0.024818 0.000000 # Chi-squared of fit: 2.90 DOF: 12 RMS: 0.10 # Min/Max residuals: -0.13 0.27 # Exact a, adot, b, bdot, g, gdot: 1.561297E-05 2.401949E-02 8.164264E-07 8.858900E-04 2.442175E-02 -1.639972E-03 # Covariance matrix: 1.4564E-12 -6.8219E-13 4.6492E-15 -1.3086E-14 -2.4722E-13 -3.2339E-12 -6.8219E-13 1.4616E-12 -1.9783E-14 5.1124E-14 1.9359E-12 1.2688E-11 4.6492E-15 -1.9783E-14 1.3250E-12 -3.2658E-13 -3.1200E-14 -1.8398E-13 -1.3086E-14 5.1124E-14 -3.2658E-13 9.3096E-14 7.3583E-14 4.7365E-13 -2.4722E-13 1.9359E-12 -3.1200E-14 7.3583E-14 4.4195E-12 1.8352E-11 -3.2339E-12 1.2688E-11 -1.8398E-13 4.7365E-13 1.8352E-11 1.1757E-10 # lat0 lon0 xBary yBary zBary JD0 -2.713619 8.856916 0.051551 -0.047267 -0.999486 2456564.729018 # Heliocentric elements and errors Epoch: 2456560.5000 = 2013/09/25 Mean Anomaly: 299.58187 +/- 0.094 Argument of Peri: 17.19295 +/- 0.118 Long of Asc Node: 60.21818 +/- 0.009 Inclination: 3.38659 +/- 0.000 Eccentricity: 0.07918456 +/- 0.0005 Semi-Major Axis: 43.42711725 +/- 0.0145 Time of Perihelion: 2474103.5331 +/- 25.8 Perihelion: 39.98836022 +/- 0.0250 Aphelion: 46.86587428 +/- 0.0263 Period (y) 286.1869 +/- 0.14 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 41.40958069 +/- 0.0035 Ecliptic Y 6.40365371 +/- 0.0005 Ecliptic Z -1.93858745 +/- 0.0002 Ecliptic XDOT -0.00059758 +/- 0.0000 Ecliptic YDOT 0.00263177 +/- 0.0000 Ecliptic ZDOT 0.00010805 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.94661220 +/- 0.0034 Geocenter to KBO 40.94710374 +/- 0.0035 # Hcoef: 7.65
The following table shows the complete astrometric record for 17QQ131. 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 (17QQ131) followed by the observatory code and reference code for the source of the astrometry.
2013 09 29.22824 00 36 49.118 +01 00 59.10 24.0r 17QQ131 W84 C~52bu 2016 11 05.19246 00 49 08.231 +02 30 49.99 24.7r 17QQ131 W84 C~52bu 2017 08 28.28126 00 58 58.858 +03 36 00.24 24.0r 17QQ131 W84 C~52bu 2017 09 27.23225 00 57 01.078 +03 23 12.13 23.8r 17QQ131 W84 C~52bu 2017 09 27.23363 00 57 01.093 +03 23 12.35 23.5i 17QQ131 W84 C~52bu 2017 09 27.23772 00 57 01.056 +03 23 12.09 22.3z 17QQ131 W84 C~52bu 2017 10 20.16907 00 55 17.602 +03 12 40.94 23.5z 17QQ131 W84 C~52bu 2017 10 22.16624 00 55 08.782 +03 11 48.92 23.3z 17QQ131 W84 C~52bu 2018 09 14.33468 01 03 00.753 +04 04 29.60 23.9i 17QQ131 W84 C~52bu
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 -0.01 0.00 -0.05
2 3.1019 12322.43 0.11 610.44 0.12
3 3.9125 22062.67 -0.06 756.39 0.10
4 3.9945 20119.20 -0.13 735.84 -0.11
5 3.9945 20119.49 0.27 735.96 0.01
6 3.9946 20118.87 -0.04 735.94 -0.02
7 4.0573 18431.55 -0.07 759.09 0.00
8 4.0628 18288.50 -0.13 762.76 0.05
9 4.9585 26117.50 0.06 925.04 -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.
17QQ131 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.671 43.711 43.630 ecceobj 0.080 0.081 0.079 incobj 3.385 3.385 3.385 qmin 38.345 38.440 38.375 qmax 48.697 48.749 48.665 amean 43.421 43.451 43.382 amin 43.072 43.099 43.027 amax 43.806 43.836 43.764 emean 0.091 0.092 0.090 emin 0.068 0.071 0.068 emax 0.113 0.113 0.113 imean 1.940 1.973 1.920 imin 0.747 0.769 0.724 imax 2.944 2.990 2.935 excite_mean 0.098 0.099 0.097 fracstop 1.000 1.000 1.000 cjmean 3.083 3.083 3.083 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 166.1 166.7 164.9 kozaiamp 179.9 180.0 179.9