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: 15GU57
# Created Sun Nov 24 02:10:18 2024
# Orbit generated from Bernstein formalism
# Fitting 35 observations of 35
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000115 0.025605 0.000004 -0.000703 0.024829 0.000000
# Chi-squared of fit: 4.52 DOF: 64 RMS: 0.06
# Min/Max residuals: -0.15 0.16
# Exact a, adot, b, bdot, g, gdot:
1.660347E-05 2.554069E-02 -2.332774E-07 -6.997913E-04 2.495855E-02 7.775534E-04
# Covariance matrix:
1.9236E-13 -1.8209E-14 -1.8527E-17 -2.0389E-15 1.3567E-13 1.8060E-12
-1.8209E-14 2.9886E-13 9.2542E-16 -7.2361E-15 1.7624E-13 6.3887E-12
-1.8527E-17 9.2542E-16 1.0028E-13 -7.7845E-14 5.0144E-16 3.0851E-14
-2.0389E-15 -7.2361E-15 -7.7845E-14 1.0379E-13 -6.3412E-15 -2.3699E-13
1.3567E-13 1.7624E-13 5.0144E-16 -6.3412E-15 2.4978E-13 5.6052E-12
1.8060E-12 6.3887E-12 3.0851E-14 -2.3699E-13 5.6052E-12 2.0923E-10
# lat0 lon0 xBary yBary zBary JD0
1.847981 -157.647552 0.797714 0.018790 -0.578015 2457071.068908
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 7.91969 +/- 0.343
Argument of Peri: 120.64683 +/- 0.410
Long of Asc Node: 71.14907 +/- 0.013
Inclination: 2.37954 +/- 0.000
Eccentricity: 0.08423926 +/- 0.0001
Semi-Major Axis: 44.34826473 +/- 0.0029
Time of Perihelion: 2454697.3847 +/- 102.8
Perihelion: 40.61239969 +/- 0.0060
Aphelion: 48.08412976 +/- 0.0062
Period (y) 295.3406 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.87765323 +/- 0.0007
Ecliptic Y -14.71163385 +/- 0.0003
Ecliptic Z 1.29204374 +/- 0.0000
Ecliptic XDOT 0.00098071 +/- 0.0000
Ecliptic YDOT -0.00263013 +/- 0.0000
Ecliptic ZDOT -0.00007388 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.65486640 +/- 0.0007
Geocenter to KBO 40.06642904 +/- 0.0008
# Hcoef: 7.78
The following table shows the complete astrometric record for 15GU57. 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 (15GU57) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.56813 13 25 27.050 -06 59 06.19 23.8r 15GU57 568 C~2nvX 2015 02 17.60905 13 25 26.956 -06 59 05.57 23.8r 15GU57 568 C~2nvX 2015 02 20.60184 13 25 19.750 -06 58 16.55 23.8r 15GU57 568 C~2nvX 2015 03 18.54653 13 23 51.580 -06 48 52.69 24.0r 15GU57 568 C~2nvX 2015 03 18.58746 13 23 51.404 -06 48 51.59 23.6r 15GU57 568 C~2nvX 2015 03 20.55033 13 23 43.237 -06 48 01.28 23.8r 15GU57 568 C~2nvX 2015 04 11.48481 13 22 04.555 -06 38 06.40 23.6r 15GU57 568 C~2nvX 2015 04 13.34921 13 21 55.886 -06 37 15.21 23.5r 15GU57 568 C~2nvX 2015 04 13.39016 13 21 55.697 -06 37 14.09 23.8r 15GU57 568 C~2nvX 2015 04 13.45967 13 21 55.370 -06 37 12.15 24.0r 15GU57 568 C~2nvX 2015 04 19.39003 13 21 27.811 -06 34 30.85 23.6r 15GU57 568 C~2nvX 2015 04 19.50158 13 21 27.278 -06 34 27.94 23.6r 15GU57 568 C~2nvX 2015 06 20.26264 13 18 03.503 -06 16 16.72 23.8r 15GU57 568 C~2nvX 2015 06 20.30355 13 18 03.456 -06 16 16.59 24.1r 15GU57 568 C~2nvX 2015 06 22.30724 13 18 01.197 -06 16 09.29 24.1r 15GU57 568 C~2nvX 2015 07 14.25857 13 17 59.580 -06 17 11.74 24.1r 15GU57 568 C~2nvX 2015 07 20.24993 13 18 06.629 -06 18 14.14 23.9r 15GU57 568 C~2nvX 2015 07 20.26062 13 18 06.643 -06 18 14.28 23.8r 15GU57 568 C~2nvX 2016 02 04.55115 13 31 14.131 -07 36 22.25 24.2w 15GU57 568 C~2nvX 2016 02 10.53908 13 31 06.477 -07 35 23.47 24.3w 15GU57 568 C~2nvX 2016 03 11.54027 13 29 44.424 -07 26 27.31 24.0w 15GU57 568 C~2nvX 2016 04 03.42104 13 28 07.446 -07 16 39.94 24.1w 15GU57 568 C~2nvX 2016 04 09.40077 13 27 39.782 -07 13 56.76 24.0w 15GU57 568 C~2nvX 2016 05 01.35644 13 25 59.025 -07 04 17.35 24.0w 15GU57 568 C~2nvX 2016 05 02.29905 13 25 54.898 -07 03 54.29 24.1w 15GU57 568 C~2nvX 2016 05 06.30882 13 25 37.693 -07 02 18.25 24.1w 15GU57 568 C~2nvX 2016 05 28.26791 13 24 16.743 -06 55 02.40 24.0w 15GU57 568 C~2nvX 2016 05 28.27599 13 24 16.717 -06 55 02.24 24.0w 15GU57 568 C~2nvX 2016 05 28.28814 13 24 16.681 -06 55 02.07 24.0w 15GU57 568 C~2nvX 2016 06 04.35749 13 23 56.828 -06 53 22.46 24.1w 15GU57 568 C~2nvX 2016 06 27.26867 13 23 19.263 -06 50 46.88 24.2w 15GU57 568 C~2nvX 2016 07 06.30443 13 23 16.755 -06 51 01.41 24.3w 15GU57 568 C~2nvX 2017 02 24.62769 13 36 01.613 -08 06 15.38 15GU57 568 C~2nvX 2017 02 24.63851 13 36 01.596 -08 06 15.11 15GU57 568 C~2nvX 2017 03 29.45461 13 34 00.721 -07 53 54.75 24.1w 15GU57 568 C~2nvX
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 -0.09 0.00 -0.04
2 0.0001 -1.53 -0.04 0.06 -0.05
3 0.0083 -119.35 -0.05 5.82 -0.01
4 0.0793 -1547.86 0.02 42.23 0.04
5 0.0795 -1550.70 -0.05 42.27 0.07
6 0.0848 -1682.33 0.05 43.80 -0.02
7 0.1449 -3268.43 -0.05 49.34 0.02
8 0.1500 -3407.40 0.06 48.77 0.00
9 0.1501 -3410.43 0.13 48.76 0.03
10 0.1503 -3415.68 0.16 48.74 0.07
11 0.1665 -3857.00 -0.01 45.50 -0.01
12 0.1668 -3865.45 -0.09 45.24 -0.15
13 0.3359 -7093.00 -0.05 -76.45 -0.00
14 0.3360 -7093.70 0.05 -76.59 -0.01
15 0.3415 -7127.71 0.01 -82.43 0.03
16 0.4016 -7126.71 -0.10 -149.40 0.09
17 0.4180 -7005.75 0.00 -167.96 0.01
18 0.4180 -7005.51 -0.00 -168.01 -0.01
19 0.9637 5626.14 0.05 -171.73 0.02
20 0.9801 5498.61 0.03 -158.91 -0.01
21 1.0622 4165.96 -0.06 -109.52 -0.03
22 1.1249 2607.92 0.06 -95.74 -0.01
23 1.1412 2165.06 0.04 -96.17 0.06
24 1.2013 557.43 -0.06 -112.65 0.13
25 1.2039 491.82 -0.12 -113.98 -0.02
26 1.2149 218.35 0.06 -119.66 -0.07
27 1.2750 -1062.61 0.04 -161.91 -0.06
28 1.2750 -1063.03 0.02 -161.91 -0.03
29 1.2751 -1063.59 0.05 -161.95 -0.04
30 1.2944 -1375.09 -0.01 -179.23 -0.10
31 1.3572 -1952.32 0.00 -242.63 0.13
32 1.3819 -1981.60 -0.04 -270.00 -0.10
33 2.0207 10264.89 -0.08 -275.43 -0.01
34 2.0207 10264.56 0.06 -275.27 0.13
35 2.1106 8318.75 -0.00 -242.45 -0.05
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.
15GU57 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.907 43.917 43.897 ecceobj 0.075 0.075 0.074 incobj 2.381 2.381 2.381 qmin 39.935 39.909 39.949 qmax 48.690 48.733 48.705 amean 44.186 44.198 44.180 amin 43.833 43.860 43.836 amax 44.562 44.572 44.557 emean 0.077 0.077 0.076 emin 0.060 0.061 0.060 emax 0.093 0.093 0.093 imean 1.041 1.037 1.032 imin 0.176 0.177 0.172 imax 1.639 1.623 1.618 excite_mean 0.079 0.080 0.079 fracstop 1.000 1.000 1.000 cjmean 3.096 3.096 3.096 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 180.7 182.7 183.6 kozaiamp 179.9 180.0 180.0