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: 15KH166 # Created Fri Jan 24 02:10:49 2025 # Orbit generated from Bernstein formalism # Fitting 17 observations of 17 # Arc: 55.93d # First observation: 2015/05/17 # Last observation: 2015/07/12 Preliminary a, adot, b, bdot, g, gdot: -0.000002 0.024246 -0.000005 0.007589 0.022843 0.000000 # Chi-squared of fit: 4.69 DOF: 28 RMS: 0.09 # Min/Max residuals: -0.16 0.22 # Exact a, adot, b, bdot, g, gdot: 1.483022E-05 2.096062E-02 4.814617E-06 6.759249E-03 2.232993E-02 5.307729E-03 # Covariance matrix: 2.8795E-13 3.4179E-11 -4.0633E-14 9.2316E-12 8.0811E-12 -1.2588E-10 3.4179E-11 4.5276E-08 -6.4376E-11 1.1473E-08 7.3808E-09 -1.2204E-06 -4.0633E-14 -6.4376E-11 2.3360E-13 -1.7352E-11 -1.0313E-11 1.8016E-09 9.2316E-12 1.1473E-08 -1.7352E-11 2.9298E-09 1.8769E-09 -3.0731E-07 8.0811E-12 7.3808E-09 -1.0313E-11 1.8769E-09 1.2494E-09 -1.8290E-07 -1.2588E-10 -1.2204E-06 1.8016E-09 -3.0731E-07 -1.8290E-07 3.8608E-05 # lat0 lon0 xBary yBary zBary JD0 15.213947 -141.264835 -0.302035 0.252876 -0.929489 2457159.916175 # Heliocentric elements and errors Epoch: 2457150.5000 = 2015/05/08 Mean Anomaly: 36.86855 +/- 10.851 Argument of Peri: 335.29172 +/- 27.843 Long of Asc Node: 180.48203 +/- 0.256 Inclination: 23.07309 +/- 0.116 Eccentricity: 0.30612169 +/- 0.2800 Semi-Major Axis: 56.79827243 +/- 9.8572 Time of Perihelion: 2441138.1636 +/- 2198.5 Perihelion: 39.41108938 +/- 17.3122 Aphelion: 74.18545549 +/- 20.4619 Period (y) 428.0662 +/- 111.43 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -34.27374170 +/- 0.0534 Ecliptic Y -27.87831723 +/- 0.0428 Ecliptic Z 11.75238844 +/- 0.0186 Ecliptic XDOT 0.00128505 +/- 0.0006 Ecliptic YDOT -0.00226766 +/- 0.0004 Ecliptic ZDOT 0.00097055 +/- 0.0002 # Distances at JD0 (AU) Heliocenter to KBO 45.71661160 +/- 0.0480 Geocenter to KBO 44.78294777 +/- 0.0709 # Hcoef: 7.03
The following table shows the complete astrometric record for 15KH166. 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 (15KH166) followed by the observatory code and reference code for the source of the astrometry.
2015 05 17.415397 14 44 41.878 +00 02 02.70 24.1g 15KH166 568 C~2TuP 2015 05 17.422484 14 44 41.840 +00 02 02.80 24.1g 15KH166 568 C~2TuP 2015 05 17.460901 14 44 41.691 +00 02 03.46 24.3g 15KH166 568 C~2TuP 2015 05 17.465122 14 44 41.672 +00 02 03.52 24.2g 15KH166 568 C~2TuP 2015 05 17.469372 14 44 41.656 +00 02 03.76 24.2g 15KH166 568 C~2TuP 2015 05 21.382184 14 44 25.971 +00 03 09.35 23.5i 15KH166 568 C~2TuP 2015 05 21.398320 14 44 25.908 +00 03 09.61 23.6i 15KH166 568 C~2TuP 2015 05 21.406394 14 44 25.878 +00 03 09.74 23.5i 15KH166 568 C~2TuP 2015 05 26.28650 14 44 06.85 +00 04 21.4 23.0y 15KH166 T09 C~8WiZ 2015 05 26.33128 14 44 06.68 +00 04 22.1 23.4y 15KH166 T09 C~8WiZ 2015 05 26.34893 14 44 06.61 +00 04 22.6 22.7y 15KH166 T09 C~8WiZ 2015 05 26.36367 14 44 06.57 +00 04 22.4 22.8y 15KH166 T09 C~8WiZ 2015 07 12.26232 14 42 02.32 +00 05 35.8 23.7z 15KH166 T09 C~8WiZ 2015 07 12.29941 14 42 02.27 +00 05 35.6 23.5z 15KH166 T09 C~8WiZ 2015 07 12.31845 14 42 02.25 +00 05 35.5 23.6z 15KH166 T09 C~8WiZ 2015 07 12.33731 14 42 02.23 +00 05 35.0 23.4z 15KH166 T09 C~8WiZ 2015 07 12.34809 14 42 02.22 +00 05 35.0 23.8z 15KH166 T09 C~8WiZ
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 0.00 0.00 -0.01
2 0.0000 -0.57 -0.11 -0.08 -0.07
3 0.0001 -2.90 0.03 -0.15 -0.04
4 0.0001 -3.19 0.01 -0.18 -0.07
5 0.0001 -3.49 -0.02 -0.03 0.10
6 0.0109 -247.51 0.03 -10.67 0.05
7 0.0109 -248.49 0.06 -10.72 0.06
8 0.0109 -248.96 0.10 -10.74 0.08
9 0.0243 -542.52 -0.09 -31.17 -0.16
10 0.0244 -545.17 -0.06 -31.30 -0.05
11 0.0245 -546.32 -0.16 -31.15 0.20
12 0.0245 -546.83 0.22 -31.53 -0.10
13 0.1529 -2341.47 0.05 -540.06 -0.10
14 0.1530 -2342.12 -0.08 -540.48 0.05
15 0.1531 -2342.38 -0.08 -540.67 0.16
16 0.1531 -2342.51 0.05 -541.23 -0.12
17 0.1531 -2342.65 0.06 -541.28 0.00
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.
15KH166 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0