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: 15KL173
# Created Sun Dec 22 02:10:23 2024
# Orbit generated from Bernstein formalism
# Fitting 20 observations of 20
# Arc: 2.26y
# First observation: 2015/05/21
# Last observation: 2017/08/25
Preliminary a, adot, b, bdot, g, gdot:
0.000233 0.042627 -0.000064 -0.005001 0.034422 0.000000
# Chi-squared of fit: 3.87 DOF: 34 RMS: 0.08
# Min/Max residuals: -0.20 0.13
# Exact a, adot, b, bdot, g, gdot:
2.070383E-05 4.431057E-02 -2.197787E-06 -5.277149E-03 3.517260E-02 9.588065E-03
# Covariance matrix:
1.5916E-13 -1.6523E-13 -1.2463E-15 1.0299E-14 3.6901E-14 -6.9361E-13
-1.6523E-13 1.0461E-12 2.9257E-14 -1.4150E-13 3.2230E-13 1.2165E-11
-1.2463E-15 2.9257E-14 1.4452E-13 -1.0947E-13 1.4507E-14 4.1147E-13
1.0299E-14 -1.4150E-13 -1.0947E-13 1.8450E-13 -4.8339E-14 -1.9391E-12
3.6901E-14 3.2230E-13 1.4507E-14 -4.8339E-14 4.1848E-13 5.1358E-12
-6.9361E-13 1.2165E-11 4.1147E-13 -1.9391E-12 5.1358E-12 1.6900E-10
# lat0 lon0 xBary yBary zBary JD0
8.183645 -123.279070 -0.056683 0.143704 -0.998589 2457163.847978
# Heliocentric elements and errors
Epoch: 2457160.5000 = 2015/05/18
Mean Anomaly: 26.94743 +/- 0.014
Argument of Peri: 77.49334 +/- 0.036
Long of Asc Node: 106.06109 +/- 0.002
Inclination: 10.38688 +/- 0.000
Eccentricity: 0.33012596 +/- 0.0003
Semi-Major Axis: 39.62398604 +/- 0.0090
Time of Perihelion: 2450341.0324 +/- 2.7
Perihelion: 26.54307961 +/- 0.0128
Aphelion: 52.70489247 +/- 0.0165
Period (y) 249.4281 +/- 0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -15.95088164 +/- 0.0003
Ecliptic Y -24.40149566 +/- 0.0004
Ecliptic Z 4.04707447 +/- 0.0001
Ecliptic XDOT 0.00244328 +/- 0.0000
Ecliptic YDOT -0.00256523 +/- 0.0000
Ecliptic ZDOT -0.00030028 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 29.43199666 +/- 0.0004
Geocenter to KBO 28.43122357 +/- 0.0005
# Hcoef: 9.85
The following table shows the complete astrometric record for 15KL173. 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 (15KL173) followed by the observatory code and reference code for the source of the astrometry.
2015 05 21.34720 15 45 23.248 -11 27 09.58 24.6r 15KL173 568 C~2lVF 2015 05 21.38827 15 45 22.988 -11 27 08.80 24.5r 15KL173 568 C~2lVF 2015 05 21.42959 15 45 22.714 -11 27 08.20 24.7r 15KL173 568 C~2lVF 2015 05 22.50587 15 45 15.636 -11 26 48.68 24.1r 15KL173 568 C~2lVF 2015 05 25.49667 15 44 56.055 -11 25 56.60 24.5r 15KL173 568 C~2lVF 2015 06 20.38582 15 42 18.784 -11 20 52.71 24.5r 15KL173 568 C~2lVF 2015 06 20.42660 15 42 18.563 -11 20 52.46 24.5r 15KL173 568 C~2lVF 2015 06 23.44700 15 42 02.712 -11 20 36.85 24.0r 15KL173 568 C~2lVF 2015 07 12.30961 15 40 42.106 -11 20 45.54 24.7r 15KL173 568 C~2lVF 2015 07 18.39769 15 40 23.928 -11 21 28.70 24.4r 15KL173 568 C~2lVF 2016 04 03.57092 15 59 32.705 -12 33 54.57 25.0w 15KL173 568 C~2lVF 2016 04 08.62048 15 59 12.141 -12 32 07.91 24.9w 15KL173 568 C~2lVF 2016 04 29.51761 15 57 23.122 -12 24 35.53 24.6w 15KL173 568 C~2lVF 2016 05 04.49023 15 56 52.923 -12 22 51.16 24.8w 15KL173 568 C~2lVF 2016 05 30.43772 15 54 05.226 -12 15 05.83 24.8w 15KL173 568 C~2lVF 2016 07 04.32248 15 50 49.914 -12 10 54.78 24.5w 15KL173 568 C~2lVF 2016 07 05.39482 15 50 45.332 -12 10 55.93 24.8w 15KL173 568 C~2lVF 2017 01 31.65858 16 08 35.647 -13 31 42.28 24.5w 15KL173 568 C~2lVF 2017 03 30.59606 16 09 18.346 -13 22 16.12 24.8w 15KL173 568 C~2lVF 2017 08 25.24527 15 59 00.734 -13 09 35.71 25.9w 15KL173 568 C~2lVF
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 -0.16 0.00 -0.04
2 0.0001 -3.90 0.04 -0.09 0.05
3 0.0002 -7.96 0.11 -0.40 -0.09
4 0.0032 -113.75 0.06 -4.55 -0.01
5 0.0114 -406.00 0.05 -17.97 0.07
6 0.0822 -2728.02 0.03 -240.28 0.02
7 0.0824 -2731.25 0.07 -240.77 0.03
8 0.0906 -2961.93 0.05 -278.11 0.02
9 0.1423 -4115.09 -0.07 -554.64 -0.01
10 0.1589 -4365.78 -0.17 -657.33 -0.16
11 0.8712 13051.76 -0.05 -1213.04 0.05
12 0.8851 12733.72 0.09 -1171.95 0.13
13 0.9423 11071.93 -0.20 -1066.73 0.03
14 0.9559 10616.17 0.01 -1058.62 -0.03
15 1.0269 8110.74 0.12 -1129.37 0.06
16 1.1225 5257.91 0.02 -1504.18 -0.00
17 1.1254 5192.56 0.02 -1519.95 -0.05
18 1.7011 21591.50 -0.10 -2984.25 -0.03
19 1.8597 22093.04 0.08 -2300.85 0.00
20 2.2639 13045.57 0.01 -3409.29 -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.
15KL173 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.179 39.214 39.145 ecceobj 0.322 0.323 0.322 incobj 10.382 10.382 10.382 qmin 25.998 25.912 26.085 qmax 53.538 53.643 53.415 amean 39.454 39.454 39.454 amin 39.007 39.021 39.036 amax 39.998 40.025 39.991 emean 0.324 0.325 0.323 emin 0.309 0.311 0.310 emax 0.340 0.343 0.337 imean 9.247 9.153 9.290 imin 8.555 8.533 8.621 imax 9.972 9.878 10.014 excite_mean 0.362 0.362 0.361 fracstop 1.000 1.000 1.000 cjmean 2.901 2.901 2.902 libcent 0 180.6 179.9 180.0 libamp 0 60.7 67.3 54.1 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 171.5 169.6 175.8 kozaiamp 180.0 179.9 180.0