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: 16QW134 # Created Fri Nov 22 02:10:43 2024 # Orbit generated from Bernstein formalism # Fitting 7 observations of 7 # Arc: 2.23y # First observation: 2016/08/16 # Last observation: 2018/11/07 Preliminary a, adot, b, bdot, g, gdot: 0.000009 0.025280 -0.000002 0.008722 0.025953 0.000000 # Chi-squared of fit: 3.01 DOF: 8 RMS: 0.12 # Min/Max residuals: -0.24 0.23 # Exact a, adot, b, bdot, g, gdot: 1.547731E-05 2.504128E-02 4.764709E-06 8.647698E-03 2.571810E-02 -1.184395E-04 # Covariance matrix: 5.6756E-13 1.6797E-13 1.0011E-14 7.8233E-14 5.7201E-13 4.3423E-12 1.6797E-13 2.3489E-12 -5.5886E-14 8.7713E-13 1.9860E-12 5.3787E-11 1.0011E-14 -5.5886E-14 3.7846E-13 -2.7082E-13 -2.1763E-14 -2.5960E-12 7.8233E-14 8.7713E-13 -2.7082E-13 7.7300E-13 7.1108E-13 2.8222E-11 5.7201E-13 1.9860E-12 -2.1763E-14 7.1108E-13 2.2300E-12 4.2890E-11 4.3423E-12 5.3787E-11 -2.5960E-12 2.8222E-11 4.2890E-11 1.7548E-09 # lat0 lon0 xBary yBary zBary JD0 -13.488841 20.026274 0.841145 -0.131803 -0.550208 2457616.871239 # Heliocentric elements and errors Epoch: 2457610.5000 = 2016/08/10 Mean Anomaly: 337.88030 +/- 1.287 Argument of Peri: 348.63802 +/- 1.470 Long of Asc Node: 52.79313 +/- 0.002 Inclination: 22.89504 +/- 0.001 Eccentricity: 0.05999729 +/- 0.0007 Semi-Major Axis: 41.73506220 +/- 0.0065 Time of Perihelion: 2463661.4932 +/- 352.1 Perihelion: 39.23107160 +/- 0.0283 Aphelion: 44.23905280 +/- 0.0284 Period (y) 269.6248 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 36.34013456 +/- 0.0021 Ecliptic Y 12.34930467 +/- 0.0007 Ecliptic Z -9.06954918 +/- 0.0005 Ecliptic XDOT -0.00072123 +/- 0.0000 Ecliptic YDOT 0.00256697 +/- 0.0000 Ecliptic ZDOT 0.00089812 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.43814686 +/- 0.0019 Geocenter to KBO 38.88311607 +/- 0.0023 # Hcoef: 7.52
The following table shows the complete astrometric record for 16QW134. 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 (16QW134) followed by the observatory code and reference code for the source of the astrometry.
2016 08 16.37045 01 34 13.372 -04 40 38.88 23.2i 16QW134 W84 C~55Zc 2016 08 26.35332 01 33 49.687 -04 45 05.53 23.5r 16QW134 W84 C~55Zc 2016 08 30.33861 01 33 38.008 -04 46 58.42 24.2g 16QW134 W84 C~55Zc 2016 11 07.14146 01 28 28.544 -05 15 31.48 22.5z 16QW134 W84 C~55Zc 2017 11 15.15979 01 32 30.961 -04 16 43.85 23.9r 16QW134 W84 C~55Zc 2017 11 19.15300 01 32 14.055 -04 17 12.50 23.7r 16QW134 W84 C~55Zc 2018 11 07.20873 01 37 45.078 -03 14 49.53 23.3r 16QW134 W84 C~55Zc
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 -0.02 0.00 0.11
2 0.0273 -428.22 0.08 -114.46 -0.06
3 0.0382 -632.38 -0.09 -153.68 -0.06
4 0.2266 -5562.99 0.03 -13.61 -0.04
5 1.2479 -882.22 0.23 1904.39 -0.08
6 1.2588 -1127.46 -0.24 1972.51 0.18
7 2.2254 4871.06 0.01 3584.02 -0.05
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.
16QW134 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 42.202 42.220 42.183 ecceobj 0.069 0.069 0.069 incobj 22.825 22.826 22.825 qmin 38.435 38.464 38.437 qmax 45.681 45.699 45.685 amean 41.950 41.968 41.933 amin 41.626 41.644 41.608 amax 42.292 42.318 42.273 emean 0.067 0.067 0.067 emin 0.054 0.054 0.055 emax 0.081 0.081 0.081 imean 21.615 21.618 21.613 imin 21.188 21.205 21.201 imax 22.073 22.068 22.072 excite_mean 0.374 0.374 0.374 fracstop 1.000 1.000 1.000 cjmean 2.908 2.908 2.908 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 174.3 175.9 174.4 kozaiamp 180.0 179.9 180.0