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: 15GW58
# Created Sun Nov 24 02:10:18 2024
# Orbit generated from Bernstein formalism
# Fitting 38 observations of 39
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000097 0.020634 0.000011 -0.004389 0.022437 0.000000
# Chi-squared of fit: 10.23 DOF: 70 RMS: 0.09
# Min/Max residuals: -0.23 0.34
# Exact a, adot, b, bdot, g, gdot:
1.468343E-05 2.046259E-02 -2.764537E-06 -4.346798E-03 2.242736E-02 -2.309358E-03
# Covariance matrix:
1.7541E-13 -1.2279E-16 2.3497E-15 -1.8678E-14 1.4383E-13 2.4528E-12
-1.2279E-16 2.3722E-13 8.5070E-15 -4.9540E-14 1.5492E-13 6.4266E-12
2.3497E-15 8.5070E-15 8.1329E-14 -6.5980E-14 7.6001E-15 3.8652E-13
-1.8678E-14 -4.9540E-14 -6.5980E-14 1.1028E-13 -4.9926E-14 -2.2247E-12
1.4383E-13 1.5492E-13 7.6001E-15 -4.9926E-14 2.5305E-13 6.5105E-12
2.4528E-12 6.4266E-12 3.8652E-13 -2.2247E-12 6.5105E-12 2.8845E-10
# lat0 lon0 xBary yBary zBary JD0
2.663650 -155.102617 0.822331 0.025361 -0.542154 2457071.097458
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 281.36941 +/- 0.086
Argument of Peri: 260.50477 +/- 0.026
Long of Asc Node: 36.07655 +/- 0.001
Inclination: 12.24283 +/- 0.001
Eccentricity: 0.12534855 +/- 0.0008
Semi-Major Axis: 45.55968330 +/- 0.0099
Time of Perihelion: 2481603.9436 +/- 25.5
Perihelion: 39.84884317 +/- 0.0378
Aphelion: 51.27052343 +/- 0.0385
Period (y) 307.5242 +/- 0.10
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.24205082 +/- 0.0009
Ecliptic Y -18.23376802 +/- 0.0004
Ecliptic Z 2.07202445 +/- 0.0000
Ecliptic XDOT 0.00128106 +/- 0.0000
Ecliptic YDOT -0.00216324 +/- 0.0000
Ecliptic ZDOT -0.00054308 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.14056199 +/- 0.0008
Geocenter to KBO 44.58839511 +/- 0.0010
# Hcoef: 7.92
The following table shows the complete astrometric record for 15GW58. 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 (15GW58) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.59668 13 36 11.509 -07 09 36.53 23.9r 15GW58 568 C~2nvb 2015 02 17.63771 13 36 11.438 -07 09 36.05 23.3r 15GW58 568 C~2nvb 2015 02 20.63083 13 36 05.127 -07 08 57.31 24.6r 15GW58 568 C~2nvb 2015 03 18.57516 13 34 46.186 -07 01 18.72 24.3r 15GW58 568 C~2nvb 2015 03 18.62254 13 34 46.008 -07 01 17.65 24.1r 15GW58 568 C~2nvb 2015 03 20.57938 13 34 38.598 -07 00 36.12 24.0r 15GW58 568 C~2nvb 2015 04 11.51365 13 33 07.903 -06 52 22.01 24.3r 15GW58 568 C~2nvb 2015 04 13.37789 13 32 59.839 -06 51 39.27 24.2r 15GW58 568 C~2nvb 2015 04 13.41891 13 32 59.661 -06 51 38.31 24.4r 15GW58 568 C~2nvb 2015 04 13.42365 13 32 59.647 -06 51 38.21 24.5r 15GW58 568 C~2nvb 2015 04 13.42846 13 32 59.620 -06 51 37.95 24.4r 15GW58 568 C~2nvb 2015 04 13.43331 13 32 59.593 -06 51 37.99 24.4r 15GW58 568 C~2nvb 2015 04 13.43815 13 32 59.575 -06 51 37.93 24.6r 15GW58 568 C~2nvb 2015 04 13.52145 13 32 59.212 -06 51 35.97 24.5r 15GW58 568 C~2nvb 2015 04 19.48929 13 32 33.310 -06 49 20.32 24.4r 15GW58 568 C~2nvb 2015 04 19.53630 13 32 33.129 -06 49 19.04 24.7r 15GW58 568 C~2nvb 2015 04 19.56015 13 32 33.010 -06 49 19.17 24.8r 15GW58 568 C~2nvb 2015 05 18.34130 13 30 36.949 -06 39 49.02 24.2r 15GW58 568 C~2nvb 2015 06 20.29133 13 29 11.709 -06 34 26.99 24.6r 15GW58 568 C~2nvb 2015 06 20.33212 13 29 11.641 -06 34 27.22 24.3r 15GW58 568 C~2nvb 2015 06 22.33610 13 29 08.859 -06 34 22.95 24.6r 15GW58 568 C~2nvb 2015 07 14.28829 13 28 59.007 -06 35 41.70 24.7r 15GW58 568 C~2nvb 2015 07 20.28135 13 29 03.080 -06 36 43.16 24.6r 15GW58 568 C~2nvb 2016 02 10.57151 13 40 27.146 -07 50 23.56 24.7w 15GW58 568 C~2nvb 2016 02 10.61301 13 40 27.082 -07 50 23.34 24.8w 15GW58 568 C~2nvb 2016 03 11.56297 13 39 13.799 -07 43 18.19 25.8w 15GW58 568 C~2nvb 2016 04 03.45339 13 37 44.873 -07 35 12.58 24.6w 15GW58 568 C~2nvb 2016 04 09.43453 13 37 19.219 -07 32 56.60 24.6w 15GW58 568 C~2nvb 2016 05 02.32746 13 35 40.639 -07 24 33.33 25.1w 15GW58 568 C~2nvb 2016 05 06.33724 13 35 24.205 -07 23 13.08 24.1w 15GW58 568 C~2nvb 2016 05 28.29624 13 34 05.240 -07 17 11.60 24.6w 15GW58 568 C~2nvb 2016 05 28.30839 13 34 05.203 -07 17 11.43 24.9w 15GW58 568 C~2nvb 2016 05 29.31531 13 34 02.150 -07 16 58.67 24.7w 15GW58 568 C~2nvb 2016 06 04.37369 13 33 45.088 -07 15 50.45 24.6w 15GW58 568 C~2nvb 2016 06 27.34232 13 33 03.339 -07 13 55.33 24.2w 15GW58 568 C~2nvb 2016 07 07.33209 13 32 57.731 -07 14 21.51 25.1w 15GW58 568 C~2nvb 2017 02 24.64707 13 44 05.198 -08 27 18.80 15GW58 568 C~2nvb 2017 03 29.46871 13 42 14.601 -08 17 15.82 24.0w 15GW58 568 C~2nvb 2017 03 29.47339 13 42 14.573 -08 17 15.57 15GW58 568 C~2nvb
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 -0.05 0.00 -0.06
2 0.0001 -1.16 0.15 0.06 -0.01
3 0.0083 -102.74 0.02 1.99 0.03
4 0.0793 -1364.15 0.01 1.36 -0.10
5 0.0795 -1367.01 0.02 1.39 -0.02
6 0.0848 -1484.88 -0.13 -0.14 -0.07
7 0.1449 -2922.69 -0.10 -32.72 -0.08
8 0.1500 -3050.12 -0.05 -36.79 -0.03
9 0.1501 -3052.94 -0.02 -36.86 0.00
10 0.1501 -3053.17 0.08 -36.84 0.03
11 0.1501 -3053.64 -0.05 -36.75 0.14
12 0.1501 -3054.00 -0.08 -36.93 -0.03
13 0.1501 -3054.27 -0.01 -36.98 -0.06
14 0.1504 -3060.02 0.03 -37.13 0.02
15 0.1667 -3468.78 -0.18 -51.79 0.24
16 0.1668 -3471.76 ( 0.10) -51.58 ( 0.59)
17 0.1669 -3473.36 0.14 -52.35 -0.11
18 0.2457 -5291.79 0.11 -154.39 0.08
19 0.3359 -6592.57 -0.02 -320.63 0.34
20 0.3360 -6593.43 0.03 -321.22 -0.01
21 0.3415 -6633.60 0.12 -332.47 -0.00
22 0.4016 -6741.36 0.07 -459.68 -0.20
23 0.4180 -6662.27 -0.11 -494.59 -0.05
24 0.9801 4430.94 0.03 -902.46 0.09
25 0.9802 4429.97 0.01 -902.60 -0.06
26 1.0622 3260.39 0.07 -900.14 -0.00
27 1.1249 1852.03 0.01 -926.66 -0.02
28 1.1412 1447.20 0.04 -938.40 0.02
29 1.2039 -101.61 -0.15 -1002.45 -0.08
30 1.2149 -358.51 -0.07 -1016.69 -0.10
31 1.2750 -1584.29 0.09 -1108.15 -0.00
32 1.2750 -1584.86 0.10 -1108.19 0.01
33 1.2778 -1631.81 0.03 -1112.88 0.03
34 1.2944 -1893.10 0.01 -1141.99 0.02
35 1.3573 -2513.57 0.07 -1261.63 -0.00
36 1.3846 -2581.70 -0.23 -1316.49 0.03
37 2.0207 8253.32 -0.12 -1803.04 0.01
38 2.1105 6502.69 0.14 -1830.74 -0.04
39 2.1105 6502.22 -0.03 -1830.66 0.06
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.
15GW58 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.151 45.175 45.127 ecceobj 0.128 0.130 0.126 incobj 12.293 12.294 12.293 qmin 39.162 38.993 39.230 qmax 52.042 52.373 51.943 amean 45.456 45.493 45.432 amin 45.084 45.095 45.058 amax 45.872 45.935 45.844 emean 0.122 0.126 0.121 emin 0.111 0.114 0.109 emax 0.135 0.140 0.133 imean 11.544 11.535 11.540 imin 11.110 11.098 11.110 imax 12.038 12.072 12.031 excite_mean 0.235 0.236 0.234 fracstop 1.000 1.000 1.000 cjmean 3.052 3.051 3.052 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 178.8 178.7 179.0 kozaiamp 180.0 179.9 180.0