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: 15GW57
# Created Sun Nov 24 02:10:18 2024
# Orbit generated from Bernstein formalism
# Fitting 34 observations of 34
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000110 0.021174 0.000001 0.000836 0.022449 0.000000
# Chi-squared of fit: 7.50 DOF: 62 RMS: 0.08
# Min/Max residuals: -0.16 0.25
# Exact a, adot, b, bdot, g, gdot:
1.509066E-05 2.104448E-02 4.457614E-07 8.290019E-04 2.251001E-02 -6.855785E-04
# Covariance matrix:
1.8984E-13 -1.1491E-14 -1.8666E-15 3.7840E-15 1.4359E-13 2.1085E-12
-1.1491E-14 2.8364E-13 -4.4866E-15 1.4457E-14 1.7251E-13 7.7821E-12
-1.8666E-15 -4.4866E-15 9.2947E-14 -7.1060E-14 -4.6899E-15 -1.8806E-13
3.7840E-15 1.4457E-14 -7.1060E-14 1.0124E-13 1.2594E-14 6.1752E-13
1.4359E-13 1.7251E-13 -4.6899E-15 1.2594E-14 2.6139E-13 6.8602E-12
2.1085E-12 7.7821E-12 -1.8806E-13 6.1752E-13 6.8602E-12 3.3204E-10
# lat0 lon0 xBary yBary zBary JD0
3.100246 -158.217013 0.791884 0.031848 -0.585412 2457071.072988
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 275.35394 +/- 0.087
Argument of Peri: 143.21615 +/- 0.067
Long of Asc Node: 147.76376 +/- 0.010
Inclination: 3.82811 +/- 0.001
Eccentricity: 0.04802675 +/- 0.0009
Semi-Major Axis: 45.11822760 +/- 0.0046
Time of Perihelion: 2483097.8952 +/- 26.3
Perihelion: 42.95134591 +/- 0.0393
Aphelion: 47.28510929 +/- 0.0393
Period (y) 303.0653 +/- 0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -42.03325256 +/- 0.0009
Ecliptic Y -15.94376507 +/- 0.0004
Ecliptic Z 2.40264491 +/- 0.0001
Ecliptic XDOT 0.00102858 +/- 0.0000
Ecliptic YDOT -0.00234948 +/- 0.0000
Ecliptic ZDOT 0.00009627 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.01966979 +/- 0.0009
Geocenter to KBO 44.42467556 +/- 0.0010
# Hcoef: 8.03
The following table shows the complete astrometric record for 15GW57. 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 (15GW57) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.57221 13 25 11.620 -05 36 39.95 24.5r 15GW57 568 C~2nvX 2015 02 17.61316 13 25 11.535 -05 36 39.32 24.8r 15GW57 568 C~2nvX 2015 02 20.60593 13 25 04.894 -05 35 46.99 24.7r 15GW57 568 C~2nvX 2015 03 18.55062 13 23 44.235 -05 26 16.93 24.4r 15GW57 568 C~2nvX 2015 03 18.59161 13 23 44.073 -05 26 15.83 24.2r 15GW57 568 C~2nvX 2015 03 20.55443 13 23 36.637 -05 25 26.49 24.6r 15GW57 568 C~2nvX 2015 04 11.48904 13 22 06.831 -05 15 55.59 24.3r 15GW57 568 C~2nvX 2015 04 13.35330 13 21 58.943 -05 15 07.07 24.2r 15GW57 568 C~2nvX 2015 04 13.39426 13 21 58.761 -05 15 05.95 24.2r 15GW57 568 C~2nvX 2015 04 13.46376 13 21 58.475 -05 15 04.20 24.4r 15GW57 568 C~2nvX 2015 04 13.46849 13 21 58.449 -05 15 04.07 24.2r 15GW57 568 C~2nvX 2015 04 19.39411 13 21 33.414 -05 12 32.69 24.1r 15GW57 568 C~2nvX 2015 04 19.50579 13 21 32.932 -05 12 29.71 24.8r 15GW57 568 C~2nvX 2015 05 18.26844 13 19 42.295 -05 01 57.26 25.0r 15GW57 568 C~2nvX 2015 06 20.26671 13 18 26.308 -04 55 59.32 24.4r 15GW57 568 C~2nvX 2015 06 20.30767 13 18 26.257 -04 55 59.25 24.5r 15GW57 568 C~2nvX 2015 06 22.31136 13 18 24.108 -04 55 53.69 24.7r 15GW57 568 C~2nvX 2015 07 14.26266 13 18 21.394 -04 57 03.43 24.4r 15GW57 568 C~2nvX 2015 07 20.25407 13 18 27.388 -04 58 03.19 25.1r 15GW57 568 C~2nvX 2016 02 04.54303 13 30 06.909 -06 03 53.44 25.0w 15GW57 568 C~2nvX 2016 02 10.53099 13 29 59.600 -06 02 41.60 25.6w 15GW57 568 C~2nvX 2016 03 11.52813 13 28 43.760 -05 53 13.91 24.6w 15GW57 568 C~2nvX 2016 04 03.41700 13 27 15.181 -05 43 37.78 24.6w 15GW57 568 C~2nvX 2016 05 01.34835 13 25 18.331 -05 31 58.41 24.4w 15GW57 568 C~2nvX 2016 05 01.39731 13 25 18.137 -05 31 57.58 24.7w 15GW57 568 C~2nvX 2016 05 02.29095 13 25 14.589 -05 31 37.15 24.8w 15GW57 568 C~2nvX 2016 05 06.30070 13 24 58.921 -05 30 08.64 24.4w 15GW57 568 C~2nvX 2016 05 28.26386 13 23 45.123 -05 23 34.61 24.8w 15GW57 568 C~2nvX 2016 06 04.34531 13 23 26.919 -05 22 07.09 24.8w 15GW57 568 C~2nvX 2016 06 27.27676 13 22 52.117 -05 20 01.62 25.0w 15GW57 568 C~2nvX 2016 07 06.31265 13 22 49.514 -05 20 22.20 24.8w 15GW57 568 C~2nvX 2017 03 28.56025 13 32 18.839 -06 10 41.15 15GW57 568 C~2nvX 2017 03 28.57906 13 32 18.794 -06 10 40.56 15GW57 568 C~2nvX 2017 03 29.44051 13 32 15.293 -06 10 18.37 24.5w 15GW57 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 -0.06 0.00 0.03
2 0.0001 -1.41 0.02 0.11 -0.00
3 0.0083 -112.89 0.07 11.91 0.01
4 0.0793 -1442.78 -0.05 93.84 -0.03
5 0.0795 -1445.44 -0.15 93.96 0.01
6 0.0848 -1566.87 -0.01 98.49 0.05
7 0.1449 -3024.41 -0.03 129.40 -0.10
8 0.1500 -3151.85 -0.03 130.56 0.02
9 0.1501 -3154.79 -0.13 130.59 0.04
10 0.1503 -3159.41 0.09 130.62 0.07
11 0.1503 -3159.82 0.01 130.59 0.05
12 0.1665 -3563.36 0.12 131.80 -0.10
13 0.1668 -3571.16 -0.00 131.88 0.03
14 0.2456 -5341.54 0.00 102.37 -0.00
15 0.3359 -6529.55 -0.01 10.34 0.04
16 0.3360 -6530.28 0.01 10.12 -0.02
17 0.3415 -6562.18 -0.01 3.28 0.03
18 0.4016 -6573.75 0.20 -76.61 -0.09
19 0.4180 -6468.23 -0.07 -98.58 0.06
20 0.9636 4698.82 -0.04 113.57 0.04
21 0.9800 4570.92 0.18 140.10 -0.05
22 1.0622 3309.33 0.05 249.63 -0.15
23 1.1248 1867.87 -0.02 295.73 0.02
24 1.2013 -11.45 -0.12 298.62 0.14
25 1.2014 -14.45 0.06 298.31 -0.09
26 1.2039 -71.22 0.02 297.62 0.05
27 1.2149 -321.30 -0.00 292.98 0.03
28 1.2750 -1490.81 0.01 249.46 0.04
29 1.2944 -1775.74 -0.03 229.64 -0.01
30 1.3572 -2304.92 -0.01 152.79 -0.11
31 1.3819 -2333.36 0.01 119.22 -0.12
32 2.1081 6679.73 -0.16 460.15 -0.13
33 2.1082 6678.89 0.25 460.45 0.15
34 2.1105 6622.12 -0.13 461.85 0.11
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.
15GW57 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.699 44.710 44.688 ecceobj 0.050 0.052 0.049 incobj 3.839 3.839 3.839 qmin 42.083 42.003 42.117 qmax 48.101 48.179 48.024 amean 44.990 45.002 44.979 amin 44.629 44.647 44.626 amax 45.351 45.376 45.350 emean 0.048 0.050 0.047 emin 0.033 0.035 0.032 emax 0.061 0.062 0.059 imean 3.230 3.230 3.229 imin 2.741 2.742 2.744 imax 3.728 3.732 3.728 excite_mean 0.074 0.075 0.073 fracstop 1.000 1.000 1.000 cjmean 3.107 3.107 3.107 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 183.1 183.2 183.3 kozaiamp 180.0 180.0 179.9