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: 15KY174
# Created Sat Apr 20 01:17:22 2024
# Orbit generated from Bernstein formalism
# Fitting 28 observations of 28
# Arc: 2.44y
# First observation: 2015/03/19
# Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
-0.000112 0.016570 -0.000034 -0.005498 0.020156 0.000000
# WARNING -- MRQMIN stopped after 17 iterations
# Chi-squared of fit: 7.47 DOF: 50 RMS: 0.09
# Min/Max residuals: -0.22 0.21
# Exact a, adot, b, bdot, g, gdot:
1.360579E-05 1.659052E-02 -4.138445E-06 -5.609571E-03 2.021822E-02 6.416100E-03
# Covariance matrix:
1.8102E-13 4.3188E-15 8.2962E-15 -4.9174E-14 1.4512E-13 4.1164E-12
4.3188E-15 2.2331E-13 2.4874E-14 -1.1340E-13 1.8251E-13 9.1139E-12
8.2962E-15 2.4874E-14 1.1594E-13 -9.8429E-14 2.5531E-14 2.0346E-12
-4.9174E-14 -1.1340E-13 -9.8429E-14 2.0253E-13 -1.3283E-13 -8.7344E-12
1.4512E-13 1.8251E-13 2.5531E-14 -1.3283E-13 3.0935E-13 1.0914E-11
4.1164E-12 9.1139E-12 2.0346E-12 -8.7344E-12 1.0914E-11 6.9417E-10
# lat0 lon0 xBary yBary zBary JD0
7.765206 -123.241107 0.843851 0.070695 -0.517575 2457101.145738
# Heliocentric elements and errors
Epoch: 2457100.5000 = 2015/03/19
Mean Anomaly: 57.45515 +/- 0.135
Argument of Peri: 60.34639 +/- 0.035
Long of Asc Node: 77.64376 +/- 0.001
Inclination: 19.91276 +/- 0.001
Eccentricity: 0.34006237 +/- 0.0014
Semi-Major Axis: 54.33297125 +/- 0.0603
Time of Perihelion: 2433754.0907 +/- 38.9
Perihelion: 35.85637242 +/- 0.0868
Aphelion: 72.80957007 +/- 0.1117
Period (y) 400.5008 +/- 0.67
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -27.85843632 +/- 0.0008
Ecliptic Y -40.96217514 +/- 0.0011
Ecliptic Z 6.68260648 +/- 0.0002
Ecliptic XDOT 0.00134743 +/- 0.0000
Ecliptic YDOT -0.00204313 +/- 0.0000
Ecliptic ZDOT -0.00063517 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 49.98649313 +/- 0.0010
Geocenter to KBO 49.46034373 +/- 0.0014
# Hcoef: 7.54
The following table shows the complete astrometric record for 15KY174. 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 (15KY174) followed by the observatory code and reference code for the source of the astrometry.
2015 03 19.64496 15 45 09.388 -11 52 08.26 24.2r 15KY174 568 C~2lVL 2015 03 22.56564 15 45 03.976 -11 51 34.79 24.8r 15KY174 568 C~2lVL 2015 04 13.57652 15 44 05.397 -11 46 53.78 24.4r 15KY174 568 C~2lVL 2015 04 13.61766 15 44 05.257 -11 46 53.07 24.3r 15KY174 568 C~2lVL 2015 04 18.58658 15 43 48.370 -11 45 46.11 24.1r 15KY174 568 C~2lVL 2015 05 21.34720 15 41 38.706 -11 38 57.95 24.3r 15KY174 568 C~2lVL 2015 05 21.38827 15 41 38.533 -11 38 57.44 24.7r 15KY174 568 C~2lVL 2015 05 21.42959 15 41 38.354 -11 38 57.06 24.6r 15KY174 568 C~2lVL 2015 05 22.50587 15 41 33.862 -11 38 46.01 24.2r 15KY174 568 C~2lVL 2015 05 25.49667 15 41 21.476 -11 38 15.99 24.3r 15KY174 568 C~2lVL 2015 06 20.38581 15 39 41.532 -11 35 21.16 24.5r 15KY174 568 C~2lVL 2015 06 20.42660 15 39 41.389 -11 35 20.87 24.5r 15KY174 568 C~2lVL 2015 06 23.44700 15 39 31.194 -11 35 12.10 25.0r 15KY174 568 C~2lVL 2015 07 18.39769 15 38 25.636 -11 35 42.50 24.2r 15KY174 568 C~2lVL 2016 02 06.63317 15 48 40.723 -12 27 35.56 24.7w 15KY174 568 C~2lVL 2016 02 12.61871 15 48 48.980 -12 27 25.95 24.7w 15KY174 568 C~2lVL 2016 03 15.62688 15 48 43.500 -12 23 57.30 24.3w 15KY174 568 C~2lVL 2016 04 03.54663 15 48 03.590 -12 20 23.04 24.9w 15KY174 568 C~2lVL 2016 04 08.59619 15 47 49.066 -12 19 19.38 25.3w 15KY174 568 C~2lVL 2016 04 29.49739 15 46 36.129 -12 14 50.52 24.8w 15KY174 568 C~2lVL 2016 05 04.47001 15 46 16.534 -12 13 48.31 24.7w 15KY174 568 C~2lVL 2016 05 30.45796 15 44 29.779 -12 09 12.12 24.7w 15KY174 568 C~2lVL 2016 07 04.31032 15 42 27.009 -12 06 44.84 25.0w 15KY174 568 C~2lVL 2016 07 05.38268 15 42 24.091 -12 06 45.86 24.7w 15KY174 568 C~2lVL 2017 03 30.57730 15 51 42.823 -12 52 04.77 24.9w 15KY174 568 C~2lVL 2017 07 28.31662 15 45 07.814 -12 39 22.09 15KY174 568 C~2lVL 2017 08 20.25685 15 44 59.270 -12 43 18.69 24.9w 15KY174 568 C~2lVL 2017 08 26.26800 15 45 03.763 -12 44 43.49 25.3w 15KY174 568 C~2lVL
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 -0.13 0.00 -0.05
2 0.0080 -84.91 -0.07 14.92 0.08
3 0.0683 -986.00 -0.02 96.78 0.07
4 0.0684 -988.16 -0.09 97.01 0.21
5 0.0820 -1244.84 0.03 106.76 0.07
6 0.1717 -3192.59 0.13 76.10 -0.04
7 0.1718 -3195.19 0.12 76.02 0.04
8 0.1719 -3197.83 0.07 75.79 -0.02
9 0.1748 -3264.63 -0.09 71.65 -0.17
10 0.1830 -3448.73 -0.02 59.77 0.02
11 0.2539 -4919.19 -0.03 -103.07 0.03
12 0.2540 -4921.30 -0.06 -103.27 0.17
13 0.2623 -5069.26 0.03 -128.83 -0.05
14 0.3306 -6000.91 0.08 -378.32 -0.22
15 0.8870 3493.08 0.13 -1389.13 -0.05
16 0.9034 3608.99 0.07 -1353.20 -0.07
17 0.9911 3484.81 0.06 -1167.23 -0.09
18 1.0429 2867.09 -0.03 -1086.77 -0.07
19 1.0567 2645.42 -0.21 -1071.56 0.11
20 1.1139 1543.30 0.09 -1045.55 -0.09
21 1.1275 1249.40 -0.01 -1048.56 0.04
22 1.1987 -338.06 0.06 -1127.72 -0.01
23 1.2941 -2125.75 -0.06 -1388.07 0.10
24 1.2970 -2167.22 -0.01 -1398.70 -0.17
25 2.0313 6416.47 0.02 -2241.92 0.03
26 2.3591 608.99 0.10 -2767.90 0.05
27 2.4219 539.84 -0.05 -3026.47 -0.02
28 2.4384 622.84 -0.11 -3094.50 0.08
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.
15KY174 quality flag:2 Type: SCATNEAR SCATNEAR12:5EEEEEE axisobj 53.718 53.882 53.556 ecceobj 0.335 0.339 0.331 incobj 19.939 19.939 19.939 qmin 35.007 35.110 35.370 qmax 74.136 74.508 73.594 amean 54.177 54.400 53.973 amin 53.623 53.764 53.375 amax 54.902 55.143 54.754 emean 0.334 0.333 0.332 emin 0.316 0.313 0.322 emax 0.352 0.352 0.344 imean 18.778 19.017 18.500 imin 17.952 18.190 18.192 imax 19.460 19.886 18.769 excite_mean 0.464 0.466 0.460 fracstop 1.000 1.000 1.000 cjmean 2.950 2.950 2.953 libcent 0 -180.0 -180.0 179.2 libamp 0 -180.0 -180.0 141.2 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 173.2 171.3 180.2 kozaiamp 179.9 179.9 180.0