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: 16LQ88 # Created Sun Dec 22 02:10:42 2024 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 17 observations of 17 # Arc: 15.04y # First observation: 2009/06/25 # Last observation: 2024/07/08 # Chi-squared of fit: 16.11 DOF: 28 RMS: 0.17 # Min/Max residuals: -0.34 0.41 # Exact a, adot, b, bdot, g, gdot: 1.679360E-05 3.024154E-02 -1.479136E-06 -2.650562E-03 2.825284E-02 -2.417260E-03 # Covariance matrix: 7.1669E-13 -1.3900E-13 -2.9166E-14 8.9773E-15 -4.8728E-14 -1.8553E-13 -1.3900E-13 4.2476E-14 1.5030E-14 -3.9676E-15 -2.4089E-14 7.2827E-14 -2.9166E-14 1.5030E-14 4.0137E-13 -4.1095E-14 -3.0212E-14 3.0510E-14 8.9773E-15 -3.9676E-15 -4.1095E-14 5.3294E-15 5.5188E-15 -7.8865E-15 -4.8728E-14 -2.4089E-14 -3.0212E-14 5.5188E-15 2.3196E-13 -6.1413E-14 -1.8553E-13 7.2827E-14 3.0510E-14 -7.8865E-15 -6.1413E-14 1.4204E-13 # lat0 lon0 xBary yBary zBary JD0 23.559349 -134.272441 -0.752310 0.270791 -0.621119 2455007.937999 # Heliocentric elements and errors Epoch: 2455008.5000 = 2009/06/26 Mean Anomaly: 318.86716 +/- 0.026 Argument of Peri: 150.74612 +/- 0.031 Long of Asc Node: 123.25446 +/- 0.000 Inclination: 23.73343 +/- 0.000 Eccentricity: 0.08509356 +/- 0.0000 Semi-Major Axis: 38.35078970 +/- 0.0030 Time of Perihelion: 2464920.1541 +/- 11.0 Perihelion: 35.08738430 +/- 0.0031 Aphelion: 41.61419510 +/- 0.0036 Period (y) 237.5033 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -22.57938358 +/- 0.0004 Ecliptic Y -24.24576161 +/- 0.0004 Ecliptic Z 14.14721066 +/- 0.0002 Ecliptic XDOT 0.00218125 +/- 0.0000 Ecliptic YDOT -0.00196108 +/- 0.0000 Ecliptic ZDOT -0.00032917 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.02543100 +/- 0.0004 Geocenter to KBO 35.39475896 +/- 0.0006 # Hcoef: 7.80
The following table shows the complete astrometric record for 16LQ88. 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 (16LQ88) followed by the observatory code and reference code for the source of the astrometry.
2009 06 25.437233 15 19 47.48 +06 03 50.0 16LQ88 T14 C~83EO 2009 06 26.439064 15 19 43.78 +06 03 33.8 23.3r 16LQ88 T14 C~83EO 2016 04 10.293996 16 12 05.60 +01 12 52.2 23.9g 16LQ88 W84 C~83EO 2016 04 10.306632 16 12 05.58 +01 12 53.0 23.7g 16LQ88 W84 C~83EO 2016 04 10.313821 16 12 05.51 +01 12 53.1 23.8g 16LQ88 W84 C~83EO 2016 06 09.447477 16 07 04.224 +01 31 54.15 23.4r 16LQ88 568 C~4qZm 2016 06 09.525052 16 07 03.807 +01 31 54.20 23.3r 16LQ88 568 C~4qZm 2016 06 10.443816 16 06 58.978 +01 31 54.41 23.3r 16LQ88 568 C~4qZm 2016 06 10.520512 16 06 58.570 +01 31 54.42 23.3r 16LQ88 568 C~4qZm 2016 08 02.986883 16 03 46.24 +01 15 36.2 23.5g 16LQ88 W84 C~83EO 2017 05 21.337588 16 15 31.01 +00 49 08.0 16LQ88 W84 C~83EO 2017 07 22.129777 16 10 45.20 +00 42 02.9 16LQ88 W84 C~83EO 2018 04 14.400462 16 25 11.234 -00 05 43.06 16LQ88 W84 C~83EO 2018 04 14.401827 16 25 11.222 -00 05 43.23 23.2i 16LQ88 W84 C~83EO 2022 08 16.034427 16 43 07.86 -02 50 23.6 16LQ88 W84 C~83EO 2024 07 08.10321 16 58 29.80 -03 54 37.1 16LQ88 W62 C~891T 2024 07 08.12306 16 58 29.71 -03 54 37.1 16LQ88 W62 C~891T
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 0.0027 0.00 -0.05 0.00 0.11
3 6.7922 0.00 0.01 0.00 -0.22
4 6.7923 0.00 0.41 0.00 0.16
5 6.7923 0.00 -0.24 0.00 0.03
6 6.9569 0.00 -0.04 0.00 0.00
7 6.9571 0.00 -0.06 0.00 0.01
8 6.9596 0.00 -0.06 0.00 0.01
9 6.9598 0.00 -0.05 0.00 0.03
10 7.1062 0.00 0.04 0.00 -0.34
11 7.9039 0.00 -0.00 0.00 0.02
12 8.0731 0.00 0.26 0.00 -0.16
13 8.8021 0.00 -0.07 0.00 0.22
14 8.8021 0.00 -0.17 0.00 0.01
15 13.1406 0.00 -0.31 0.00 0.38
16 15.0354 0.00 0.09 0.00 -0.26
17 15.0354 0.00 0.17 0.00 0.03
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.
16LQ88 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 38.056 38.056 38.057 ecceobj 0.080 0.080 0.080 incobj 23.748 23.748 23.748 qmin 34.252 34.300 34.231 qmax 42.793 42.782 42.663 amean 38.366 38.344 38.345 amin 38.044 38.033 38.033 amax 38.683 38.684 38.674 emean 0.087 0.083 0.085 emin 0.071 0.067 0.069 emax 0.106 0.106 0.105 imean 22.004 22.040 22.009 imin 21.138 21.130 21.132 imax 23.268 23.286 23.265 excite_mean 0.385 0.384 0.384 fracstop 1.000 1.000 1.000 cjmean 2.872 2.872 2.872 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 180.3 179.8 180.0 kozaiamp 180.0 179.9 179.9