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: 15GW55
# Created Sun Nov 24 02:10:16 2024
# Orbit generated from Bernstein formalism
# Fitting 38 observations of 39
# Arc: 2.25y
# First observation: 2015/02/17
# Last observation: 2017/05/18
Preliminary a, adot, b, bdot, g, gdot:
-0.000149 0.013453 -0.000005 -0.003359 0.017302 0.000000
# Chi-squared of fit: 7.05 DOF: 70 RMS: 0.08
# Min/Max residuals: -0.24 0.20
# Exact a, adot, b, bdot, g, gdot:
1.148573E-05 1.345883E-02 -3.161230E-06 -3.397958E-03 1.746861E-02 9.166036E-03
# Covariance matrix:
2.6643E-13 -7.2078E-15 1.4090E-14 -7.9374E-14 2.6984E-13 1.4940E-11
-7.2078E-15 1.6971E-13 8.7380E-15 -4.7355E-14 1.3117E-13 8.8774E-12
1.4090E-14 8.7380E-15 9.8162E-14 -9.6858E-14 2.5308E-14 2.0960E-12
-7.9374E-14 -4.7355E-14 -9.6858E-14 1.8771E-13 -1.4008E-13 -1.1093E-11
2.6984E-13 1.3117E-13 2.5308E-14 -1.4008E-13 4.3657E-13 2.6319E-11
1.4940E-11 8.8774E-12 2.0960E-12 -1.1093E-11 2.6319E-11 2.0742E-09
# lat0 lon0 xBary yBary zBary JD0
2.778540 -155.195309 0.821054 0.026538 -0.544028 2457071.138488
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 27.58299 +/- 0.253
Argument of Peri: 73.47410 +/- 0.029
Long of Asc Node: 34.91486 +/- 0.001
Inclination: 14.22917 +/- 0.001
Eccentricity: 0.60904365 +/- 0.0030
Semi-Major Axis: 86.74644968 +/- 0.5080
Time of Perihelion: 2434459.7570 +/- 59.4
Perihelion: 33.91407537 +/- 0.3293
Aphelion: 139.57882399 +/- 0.8586
Period (y) 807.9524 +/- 7.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -52.74478965 +/- 0.0020
Ecliptic Y -23.47098418 +/- 0.0009
Ecliptic Z 2.77484223 +/- 0.0001
Ecliptic XDOT -0.00044466 +/- 0.0000
Ecliptic YDOT -0.00253317 +/- 0.0000
Ecliptic ZDOT -0.00046220 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 57.79792110 +/- 0.0018
Geocenter to KBO 57.24554231 +/- 0.0022
# Hcoef: 6.71
The following table shows the complete astrometric record for 15GW55. 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 (15GW55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.63771 13 36 00.757 -07 01 10.02 23.2r 15GW55 568 C~2lVC 2015 03 18.57516 13 34 51.925 -06 54 25.98 24.1r 15GW55 568 C~2lVC 2015 03 18.62254 13 34 51.775 -06 54 25.13 24.2r 15GW55 568 C~2lVC 2015 03 20.57938 13 34 45.861 -06 53 51.92 24.4r 15GW55 568 C~2lVC 2015 04 11.51365 13 33 33.642 -06 47 17.07 23.8r 15GW55 568 C~2lVC 2015 04 13.37789 13 33 27.229 -06 46 43.13 24.9r 15GW55 568 C~2lVC 2015 04 13.41891 13 33 27.095 -06 46 42.43 24.5r 15GW55 568 C~2lVC 2015 04 13.42365 13 33 27.075 -06 46 42.30 24.3r 15GW55 568 C~2lVC 2015 04 13.42846 13 33 27.047 -06 46 42.31 24.4r 15GW55 568 C~2lVC 2015 04 13.43331 13 33 27.031 -06 46 42.11 24.4r 15GW55 568 C~2lVC 2015 04 13.43815 13 33 27.020 -06 46 41.95 24.3r 15GW55 568 C~2lVC 2015 04 13.52145 13 33 26.728 -06 46 40.38 23.9r 15GW55 568 C~2lVC 2015 04 19.48929 13 33 06.158 -06 44 52.57 24.3r 15GW55 568 C~2lVC 2015 04 19.53630 13 33 05.982 -06 44 51.82 24.7r 15GW55 568 C~2lVC 2015 05 18.34130 13 31 33.428 -06 37 17.05 24.4r 15GW55 568 C~2lVC 2015 06 20.29133 13 30 24.238 -06 32 53.73 24.5r 15GW55 568 C~2lVC 2015 06 20.33212 13 30 24.190 -06 32 53.55 24.6r 15GW55 568 C~2lVC 2015 06 22.33610 13 30 21.838 -06 32 49.40 24.3r 15GW55 568 C~2lVC 2015 07 14.28829 13 30 12.053 -06 33 41.23 24.4r 15GW55 568 C~2lVC 2015 07 20.28135 13 30 14.659 -06 34 26.72 25.2r 15GW55 568 C~2lVC 2016 02 04.56733 13 38 52.299 -07 30 19.11 23.9w 15GW55 568 C~2lVC 2016 02 04.57962 13 38 52.295 -07 30 19.07 24.0w 15GW55 568 C~2lVC 2016 02 10.55526 13 38 46.549 -07 29 41.38 24.7w 15GW55 568 C~2lVC 2016 02 10.56746 13 38 46.517 -07 29 41.24 24.6w 15GW55 568 C~2lVC 2016 02 10.60492 13 38 46.518 -07 29 41.08 24.7w 15GW55 568 C~2lVC 2016 02 11.57713 13 38 45.340 -07 29 33.71 25.2w 15GW55 568 C~2lVC 2016 03 11.55250 13 37 46.787 -07 23 48.63 24.6w 15GW55 568 C~2lVC 2016 03 12.47618 13 37 44.253 -07 23 34.18 24.3w 15GW55 568 C~2lVC 2016 04 03.45339 13 36 36.281 -07 17 19.47 24.4w 15GW55 568 C~2lVC 2016 04 09.43453 13 36 16.066 -07 15 31.43 24.3w 15GW55 568 C~2lVC 2016 05 02.32746 13 34 58.602 -07 08 53.73 24.4w 15GW55 568 C~2lVC 2016 05 06.33724 13 34 45.680 -07 07 50.35 24.4w 15GW55 568 C~2lVC 2016 05 28.29624 13 33 43.434 -07 03 04.83 24.4w 15GW55 568 C~2lVC 2016 05 28.30839 13 33 43.403 -07 03 04.68 24.3w 15GW55 568 C~2lVC 2016 05 29.31531 13 33 40.989 -07 02 54.61 24.9w 15GW55 568 C~2lVC 2016 06 04.37369 13 33 27.434 -07 02 00.37 25.0w 15GW55 568 C~2lVC 2016 06 27.34232 13 32 53.623 -07 00 25.17 24.4w 15GW55 568 C~2lVC 2016 07 07.33209 13 32 48.564 -07 00 42.55 24.7w 15GW55 568 C~2lVC 2017 05 18.26658 13 36 46.420 -07 32 24.62 24.1w 15GW55 568 C~2lVC
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 0.14 0.00 0.02
2 0.0792 -1101.64 -0.04 3.17 -0.03
3 0.0794 -1104.03 -0.14 3.14 -0.02
4 0.0847 -1198.15 -0.11 1.98 -0.13
5 0.1448 -2343.72 -0.02 -22.64 0.04
6 0.1499 -2445.06 0.01 -25.91 -0.03
7 0.1500 -2447.17 0.16 -25.99 -0.02
8 0.1500 -2447.49 0.10 -25.98 -0.00
9 0.1500 -2447.88 -0.02 -26.14 -0.15
10 0.1500 -2448.17 -0.04 -26.04 -0.04
11 0.1500 -2448.38 0.01 -25.95 0.06
12 0.1503 -2453.01 -0.00 -26.08 0.10
13 0.1666 -2777.67 0.15 -37.59 0.20
14 0.1667 -2780.39 0.02 -37.85 0.05
15 0.2456 -4230.49 0.08 -118.69 -0.08
16 0.3358 -5286.87 -0.06 -251.29 -0.07
17 0.3359 -5287.60 -0.02 -251.38 0.03
18 0.3414 -5321.76 0.05 -260.37 0.04
19 0.4015 -5438.50 -0.21 -362.08 0.04
20 0.4179 -5385.66 -0.04 -390.18 0.06
21 0.9635 3013.58 -0.07 -703.03 -0.00
22 0.9636 3013.51 0.02 -703.01 0.01
23 0.9799 2920.19 0.02 -698.84 -0.02
24 0.9800 2919.69 -0.24 -698.89 -0.06
25 0.9801 2919.65 ( 0.45) -698.73 ( 0.08)
26 0.9827 2900.64 0.05 -698.21 -0.02
27 1.0621 1963.76 0.09 -692.43 -0.04
28 1.0646 1923.39 -0.07 -692.65 0.03
29 1.1248 845.07 0.07 -710.81 -0.01
30 1.1411 525.58 -0.03 -719.53 0.06
31 1.2038 -692.90 0.07 -768.73 -0.00
32 1.2148 -895.10 0.00 -779.79 0.02
33 1.2749 -1862.02 0.03 -851.85 -0.00
34 1.2749 -1862.50 0.01 -851.88 0.02
35 1.2777 -1899.64 0.04 -855.62 0.00
36 1.2943 -2107.33 -0.01 -878.79 -0.11
37 1.3572 -2610.76 -0.07 -974.02 -0.07
38 1.3845 -2674.54 0.00 -1017.72 0.12
39 2.2468 1314.58 0.05 -1499.28 0.01
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.
15GW55 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 85.228 86.644 83.877 ecceobj 0.605 0.613 0.597 incobj 14.292 14.292 14.292 qmin 33.046 32.893 33.270 qmax 143.055 148.314 144.098 amean 84.637 88.035 85.646 amin 81.545 85.820 82.483 amax 88.642 91.106 89.171 emean 0.593 0.613 0.595 emin 0.569 0.593 0.574 emax 0.616 0.629 0.616 imean 15.037 14.659 15.238 imin 13.716 13.501 13.736 imax 16.551 16.663 16.800 excite_mean 0.648 0.663 0.650 fracstop 1.000 1.000 1.000 cjmean 2.962 2.955 2.967 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 163.2 158.6 169.9 kozaiamp 180.0 180.0 179.9