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: 16LX89 # Created Mon Jul 7 01:11:09 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 14 observations of 14 # Arc: 9.04y # First observation: 2016/05/14 # Last observation: 2025/05/27 # Chi-squared of fit: 3.48 DOF: 22 RMS: 0.09 # Min/Max residuals: -0.14 0.25 # Exact a, adot, b, bdot, g, gdot: 1.288585E-05 1.723577E-02 6.037085E-07 2.268390E-05 2.073131E-02 -3.813752E-05 # Covariance matrix: 2.7708E-13 -6.4384E-14 5.8463E-15 -7.1165E-16 3.3083E-13 -2.6640E-13 -6.4384E-14 2.0227E-13 1.5576E-15 2.7089E-16 1.3174E-13 1.2817E-12 5.8463E-15 1.5576E-15 1.4581E-13 -2.1008E-14 1.9436E-14 1.1655E-14 -7.1165E-16 2.7089E-16 -2.1008E-14 1.0789E-14 -1.7399E-15 1.6843E-15 3.3083E-13 1.3174E-13 1.9436E-14 -1.7399E-15 1.1591E-12 9.5331E-13 -2.6640E-13 1.2817E-12 1.1655E-14 1.6843E-15 9.5331E-13 8.5841E-12 # lat0 lon0 xBary yBary zBary JD0 13.793380 -117.402043 0.155698 0.237256 -0.965841 2457522.702202 # Heliocentric elements and errors Epoch: 2457522.5000 = 2016/05/14 Mean Anomaly: 181.35934 +/- 0.075 Argument of Peri: 268.60760 +/- 0.062 Long of Asc Node: 152.76711 +/- 0.001 Inclination: 13.51646 +/- 0.000 Eccentricity: 0.13569046 +/- 0.0001 Semi-Major Axis: 43.32862620 +/- 0.0070 Time of Perihelion: 2509216.3201 +/- 25.2 Perihelion: 37.44934498 +/- 0.0083 Aphelion: 49.20790742 +/- 0.0097 Period (y) 285.2138 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -22.15878038 +/- 0.0011 Ecliptic Y -42.40302532 +/- 0.0022 Ecliptic Z 11.50059423 +/- 0.0006 Ecliptic XDOT 0.00202390 +/- 0.0000 Ecliptic YDOT -0.00104960 +/- 0.0000 Ecliptic ZDOT 0.00000171 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 49.20662506 +/- 0.0019 Geocenter to KBO 48.23625756 +/- 0.0025 # Hcoef: 5.74
The following table shows the complete astrometric record for 16LX89. 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 (16LX89) followed by the observatory code and reference code for the source of the astrometry.
2016 05 14.201413 16 12 54.62 -07 08 07.5 16LX89 W84 C~5Xra 2016 05 14.273489 16 12 54.32 -07 08 06.2 16LX89 W84 C~5Xra 2016 05 15.246025 16 12 50.36 -07 07 52.6 16LX89 W84 C~5Xra 2016 05 15.300941 16 12 50.14 -07 07 51.9 16LX89 W84 C~5Xra 2016 06 09.349163 16 11 07.090 -07 03 29.91 22.3r 16LX89 568 C~4qZm 2016 06 09.416755 16 11 06.815 -07 03 29.48 22.5r 16LX89 568 C~4qZm 2016 06 10.336550 16 11 03.145 -07 03 23.66 22.6r 16LX89 568 C~4qZm 2016 06 10.412916 16 11 02.836 -07 03 23.19 22.4r 16LX89 568 C~4qZm 2017 07 17.128011 16 12 55.81 -07 14 29.3 16LX89 W84 C~5Xra 2017 07 17.130090 16 12 55.80 -07 14 29.6 16LX89 W84 C~5Xra 2019 05 14.186673 16 24 45.33 -07 40 25.3 16LX89 W84 C~5Xra 2019 06 08.157593 16 23 02.23 -07 35 59.5 16LX89 W84 C~5Xra 2025 05 27.382760 16 47 29.177 -08 37 53.85 22.9G 16LX89 G37 C~8vI1 2025 05 27.421710 16 47 29.031 -08 37 53.35 16LX89 G37 C~8vI1
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 -0.13
2 0.0002 0.00 -0.01 0.00 0.14
3 0.0029 0.00 -0.13 0.00 -0.05
4 0.0030 0.00 -0.02 0.00 -0.12
5 0.0716 0.00 0.03 0.00 -0.00
6 0.0718 0.00 0.04 0.00 -0.01
7 0.0743 0.00 0.03 0.00 -0.01
8 0.0745 0.00 0.04 0.00 -0.01
9 1.1743 0.00 -0.02 0.00 0.25
10 1.1743 0.00 -0.09 0.00 -0.04
11 2.9979 0.00 -0.04 0.00 0.02
12 3.0663 0.00 0.09 0.00 0.04
13 9.0354 0.00 -0.14 0.00 -0.09
14 9.0355 0.00 0.15 0.00 0.04
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.
16LX89 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 42.949 42.949 42.949 ecceobj 0.145 0.145 0.145 incobj 13.526 13.526 13.526 qmin 36.136 36.090 36.145 qmax 50.620 50.673 50.738 amean 43.245 43.245 43.245 amin 42.880 42.888 42.889 amax 43.655 43.656 43.653 emean 0.145 0.145 0.145 emin 0.127 0.127 0.127 emax 0.161 0.162 0.163 imean 13.097 13.096 13.101 imin 12.214 12.214 12.214 imax 13.962 13.944 13.957 excite_mean 0.269 0.269 0.269 fracstop 1.000 1.000 1.000 cjmean 3.006 3.006 3.006 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 178.7 179.1 179.0 kozaiamp 179.9 179.9 179.9