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: 15GH54
# Created Sun Dec 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 29 observations of 29
# Arc: 1.38y
# First observation: 2015/02/17
# Last observation: 2016/07/07
Preliminary a, adot, b, bdot, g, gdot:
-0.000229 0.043025 -0.000011 -0.013918 0.034576 0.000000
# Chi-squared of fit: 7.61 DOF: 52 RMS: 0.09
# Min/Max residuals: -0.20 0.20
# Exact a, adot, b, bdot, g, gdot:
1.965009E-05 4.269232E-02 -6.210115E-06 -1.389460E-02 3.463037E-02 -1.524002E-03
# Covariance matrix:
2.6621E-13 2.4534E-13 3.0344E-14 -2.2017E-13 3.4769E-13 1.2089E-11
2.4534E-13 1.4061E-12 1.0390E-13 -7.5254E-13 8.8758E-13 4.1307E-11
3.0344E-14 1.0390E-13 1.0452E-13 -1.7882E-13 7.8584E-14 3.7956E-12
-2.2017E-13 -7.5254E-13 -1.7882E-13 7.6812E-13 -5.6963E-13 -2.7485E-11
3.4769E-13 8.8758E-13 7.8584E-14 -5.6963E-13 7.7501E-13 3.1272E-11
1.2089E-11 4.1307E-11 3.7956E-12 -2.7485E-11 3.1272E-11 1.5086E-09
# lat0 lon0 xBary yBary zBary JD0
0.268771 -154.930754 0.824863 0.002675 -0.538879 2457071.002878
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 350.74653 +/- 0.127
Argument of Peri: 195.48459 +/- 0.229
Long of Asc Node: 24.26994 +/- 0.000
Inclination: 18.02683 +/- 0.001
Eccentricity: 0.26288228 +/- 0.0003
Semi-Major Axis: 39.58939006 +/- 0.0062
Time of Perihelion: 2459409.1699 +/- 32.1
Perihelion: 29.18204113 +/- 0.0116
Aphelion: 49.99673899 +/- 0.0133
Period (y) 249.1015 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -26.99624505 +/- 0.0007
Ecliptic Y -11.71626431 +/- 0.0003
Ecliptic Z 0.13527154 +/- 0.0000
Ecliptic XDOT 0.00153094 +/- 0.0000
Ecliptic YDOT -0.00301397 +/- 0.0000
Ecliptic ZDOT -0.00109896 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 29.42934581 +/- 0.0006
Geocenter to KBO 28.87638564 +/- 0.0007
# Hcoef: 9.64
The following table shows the complete astrometric record for 15GH54. 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 (15GH54) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.50210 13 33 18.629 -09 27 10.65 24.1r 15GH54 568 C~2lV6 2015 02 17.54344 13 33 18.508 -09 27 10.42 24.5r 15GH54 568 C~2lV6 2015 02 20.47426 13 33 09.571 -09 26 41.55 24.5r 15GH54 568 C~2lV6 2015 03 18.47063 13 31 12.546 -09 18 51.71 24.8r 15GH54 568 C~2lV6 2015 03 18.47537 13 31 12.506 -09 18 51.71 24.4r 15GH54 568 C~2lV6 2015 03 18.52182 13 31 12.243 -09 18 50.72 24.5r 15GH54 568 C~2lV6 2015 03 20.52388 13 31 00.926 -09 18 01.17 24.2r 15GH54 568 C~2lV6 2015 04 11.41445 13 28 45.543 -09 07 53.92 24.2r 15GH54 568 C~2lV6 2015 04 12.36711 13 28 39.377 -09 07 25.75 24.0r 15GH54 568 C~2lV6 2015 04 12.40803 13 28 39.125 -09 07 24.69 24.2r 15GH54 568 C~2lV6 2015 04 12.45503 13 28 38.802 -09 07 23.22 24.1r 15GH54 568 C~2lV6 2015 04 14.46499 13 28 25.804 -09 06 24.15 24.3r 15GH54 568 C~2lV6 2015 04 18.42564 13 28 00.165 -09 04 27.71 24.0r 15GH54 568 C~2lV6 2015 04 18.47335 13 27 59.859 -09 04 26.26 23.8r 15GH54 568 C~2lV6 2015 05 25.36747 13 24 28.295 -08 48 56.64 24.7r 15GH54 568 C~2lV6 2015 05 25.40947 13 24 28.090 -08 48 55.79 24.2r 15GH54 568 C~2lV6 2015 05 25.41889 13 24 28.033 -08 48 55.62 25.0r 15GH54 568 C~2lV6 2015 05 25.42508 13 24 28.008 -08 48 55.51 24.3r 15GH54 568 C~2lV6 2015 06 21.31770 13 23 02.856 -08 44 19.55 24.5r 15GH54 568 C~2lV6 2015 06 22.27415 13 23 01.315 -08 44 18.48 24.3r 15GH54 568 C~2lV6 2015 07 12.26825 13 22 54.712 -08 46 25.39 24.4r 15GH54 568 C~2lV6 2015 07 19.25818 13 23 04.149 -08 48 18.82 24.2r 15GH54 568 C~2lV6 2016 02 04.61835 13 41 49.935 -11 05 17.63 24.8w 15GH54 568 C~2lV6 2016 02 11.60157 13 41 39.983 -11 05 27.58 24.6w 15GH54 568 C~2lV6 2016 03 11.59247 13 39 57.174 -11 00 17.88 24.4w 15GH54 568 C~2lV6 2016 04 03.46553 13 37 45.180 -10 51 13.78 24.3w 15GH54 568 C~2lV6 2016 04 09.44668 13 37 06.802 -10 48 27.08 24.2w 15GH54 568 C~2lV6 2016 06 27.29699 13 30 53.131 -10 22 35.22 24.6w 15GH54 568 C~2lV6 2016 07 07.29960 13 30 48.050 -10 23 12.03 24.0w 15GH54 568 C~2lV6
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 -0.03
2 0.0001 -1.75 0.05 -0.44 -0.13
3 0.0081 -135.39 -0.16 -21.87 0.03
4 0.0793 -1919.15 0.15 -218.54 0.11
5 0.0793 -1919.70 0.02 -218.76 -0.07
6 0.0795 -1923.68 0.10 -219.26 -0.18
7 0.0849 -2097.72 0.03 -234.60 -0.01
8 0.1449 -4185.65 0.01 -406.60 -0.01
9 0.1475 -4280.96 -0.20 -414.04 0.09
10 0.1476 -4284.82 0.10 -414.43 0.06
11 0.1477 -4289.82 -0.12 -414.83 0.07
12 0.1532 -4490.64 0.14 -430.84 0.08
13 0.1641 -4886.78 -0.07 -462.59 -0.07
14 0.1642 -4891.53 0.02 -462.91 0.02
15 0.2652 -8151.27 0.17 -758.96 0.00
16 0.2653 -8154.42 0.00 -759.30 0.02
17 0.2653 -8155.26 -0.18 -759.46 -0.06
18 0.2654 -8155.65 -0.13 -759.49 -0.04
19 0.3390 -9432.52 0.01 -972.41 0.03
20 0.3416 -9454.18 -0.02 -979.93 -0.03
21 0.3963 -9497.96 -0.06 -1134.31 0.17
22 0.4155 -9325.56 0.20 -1187.61 0.05
23 0.9640 9173.04 -0.11 -2755.32 -0.01
24 0.9832 9039.64 0.10 -2817.25 -0.09
25 1.0625 7513.48 0.03 -3072.75 -0.12
26 1.1252 5502.01 -0.00 -3267.38 0.08
27 1.1415 4914.17 -0.03 -3316.77 0.01
28 1.3574 -783.57 0.05 -3881.30 0.07
29 1.3848 -839.81 -0.06 -3943.08 -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.
15GH54 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.197 39.218 39.176 ecceobj 0.256 0.256 0.256 incobj 18.083 18.083 18.083 qmin 27.316 27.295 27.424 qmax 52.096 52.073 52.226 amean 39.455 39.455 39.455 amin 39.008 38.999 38.971 amax 39.989 39.992 40.001 emean 0.231 0.232 0.230 emin 0.165 0.166 0.166 emax 0.306 0.306 0.306 imean 18.961 18.934 18.987 imin 15.594 15.525 15.693 imax 21.028 21.052 20.994 excite_mean 0.401 0.401 0.401 fracstop 1.000 1.000 1.000 cjmean 2.867 2.867 2.867 libcent 0 179.5 178.8 180.7 libamp 0 97.2 94.1 100.1 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 238.5 238.6 241.2 kozaiamp 179.9 180.0 180.0