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: 15GY56
# Created Wed May 8 01:17:04 2024
# Orbit generated from Bernstein formalism
# Fitting 36 observations of 36
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000095 0.020605 0.000000 -0.000273 0.022372 0.000000
# Chi-squared of fit: 19.43 DOF: 66 RMS: 0.13
# Min/Max residuals: -0.34 0.37
# Exact a, adot, b, bdot, g, gdot:
1.427962E-05 2.050064E-02 -4.899573E-07 -2.710935E-04 2.239979E-02 -8.765946E-05
# Covariance matrix:
1.7110E-13 -2.0158E-14 1.7678E-16 -1.3734E-15 1.3620E-13 3.3652E-12
-2.0158E-14 2.7582E-13 5.9300E-16 -3.7436E-15 1.6675E-13 9.1332E-12
1.7678E-16 5.9300E-16 9.3130E-14 -8.3544E-14 5.8265E-16 3.8887E-14
-1.3734E-15 -3.7436E-15 -8.3544E-14 1.3244E-13 -4.0003E-15 -2.4205E-13
1.3620E-13 1.6675E-13 5.8265E-16 -4.0003E-15 2.7209E-13 9.7779E-12
3.3652E-12 9.1332E-12 3.8887E-14 -2.4205E-13 9.7779E-12 5.9033E-10
# lat0 lon0 xBary yBary zBary JD0
0.153334 -154.560991 0.828323 0.001575 -0.533548 2457071.002878
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 209.07238 +/- 1.325
Argument of Peri: 321.85066 +/- 1.324
Long of Asc Node: 35.77094 +/- 0.014
Inclination: 0.76728 +/- 0.001
Eccentricity: 0.04346040 +/- 0.0005
Semi-Major Axis: 43.51565210 +/- 0.0031
Time of Perihelion: 2501027.9909 +/- 385.7
Perihelion: 41.62444437 +/- 0.0235
Aphelion: 45.40685982 +/- 0.0236
Period (y) 287.0625 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.15502291 +/- 0.0009
Ecliptic Y -18.65760174 +/- 0.0004
Ecliptic Z 0.11944568 +/- 0.0000
Ecliptic XDOT 0.00108228 +/- 0.0000
Ecliptic YDOT -0.00226378 +/- 0.0000
Ecliptic ZDOT -0.00003307 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.18690386 +/- 0.0009
Geocenter to KBO 44.64326872 +/- 0.0010
# Hcoef: 8.03
The following table shows the complete astrometric record for 15GY56. 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 (15GY56) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.50210 13 34 32.171 -09 41 43.23 24.8r 15GY56 568 C~2nvU 2015 02 17.54344 13 34 32.090 -09 41 42.84 24.9r 15GY56 568 C~2nvU 2015 02 20.47426 13 34 25.985 -09 41 07.42 24.0r 15GY56 568 C~2nvU 2015 03 18.47063 13 33 07.615 -09 33 33.31 24.8r 15GY56 568 C~2nvU 2015 03 18.47537 13 33 07.584 -09 33 33.36 24.9r 15GY56 568 C~2nvU 2015 03 18.52182 13 33 07.390 -09 33 32.31 25.0r 15GY56 568 C~2nvU 2015 03 20.52388 13 32 59.886 -09 32 48.81 25.0r 15GY56 568 C~2nvU 2015 04 11.41445 13 31 30.078 -09 24 08.70 24.7r 15GY56 568 C~2nvU 2015 04 12.36711 13 31 25.982 -09 23 44.83 24.6r 15GY56 568 C~2nvU 2015 04 12.40803 13 31 25.816 -09 23 43.88 24.5r 15GY56 568 C~2nvU 2015 04 12.45503 13 31 25.598 -09 23 42.82 24.4r 15GY56 568 C~2nvU 2015 04 14.46499 13 31 16.980 -09 22 52.68 24.7r 15GY56 568 C~2nvU 2015 04 18.42564 13 30 59.927 -09 21 13.97 24.6r 15GY56 568 C~2nvU 2015 04 18.47335 13 30 59.733 -09 21 12.90 24.1r 15GY56 568 C~2nvU 2015 05 25.37637 13 28 37.355 -09 07 28.60 24.2r 15GY56 568 C~2nvU 2015 05 25.43418 13 28 37.170 -09 07 27.48 25.1r 15GY56 568 C~2nvU 2015 06 21.32593 13 27 36.509 -09 01 40.08 24.7r 15GY56 568 C~2nvU 2015 06 22.28249 13 27 35.301 -09 01 33.29 24.4r 15GY56 568 C~2nvU 2015 07 12.27649 13 27 26.527 -09 00 49.16 24.5r 15GY56 568 C~2nvU 2015 07 15.26670 13 27 28.028 -09 00 58.65 24.1r 15GY56 568 C~2nvU 2016 02 04.60217 13 39 15.933 -10 09 55.65 24.8w 15GY56 568 C~2nvU 2016 02 10.62117 13 39 09.493 -10 09 18.44 24.9w 15GY56 568 C~2nvU 2016 02 11.58524 13 39 08.183 -10 09 11.10 25.1w 15GY56 568 C~2nvU 2016 03 11.58783 13 37 56.958 -10 02 23.69 23.8w 15GY56 568 C~2nvU 2016 03 11.63454 13 37 56.807 -10 02 22.58 25.2w 15GY56 568 C~2nvU 2016 03 12.48427 13 37 53.901 -10 02 06.43 23.5w 15GY56 568 C~2nvU 2016 04 03.46148 13 36 28.950 -09 53 59.78 24.9w 15GY56 568 C~2nvU 2016 04 09.44264 13 36 03.550 -09 51 34.28 24.7w 15GY56 568 C~2nvU 2016 05 02.32341 13 34 26.245 -09 42 16.26 24.5w 15GY56 568 C~2nvU 2016 05 02.35991 13 34 26.095 -09 42 15.36 24.3w 15GY56 568 C~2nvU 2016 05 07.36327 13 34 05.956 -09 40 20.21 24.8w 15GY56 568 C~2nvU 2016 05 28.31243 13 32 52.484 -09 33 19.46 24.7w 15GY56 568 C~2nvU 2016 05 29.31935 13 32 49.503 -09 33 02.68 25.3w 15GY56 568 C~2nvU 2016 06 04.38178 13 32 32.886 -09 31 28.00 24.9w 15GY56 568 C~2nvU 2016 06 27.29699 13 31 53.027 -09 27 43.60 24.7w 15GY56 568 C~2nvU 2017 03 29.46402 13 41 19.954 -10 22 45.18 15GY56 568 C~2nvU
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 0.04 0.00 0.06
2 0.0001 -1.26 0.11 -0.07 0.01
3 0.0081 -98.23 -0.07 0.01 0.00
4 0.0793 -1343.04 0.26 -0.15 0.21
5 0.0793 -1343.45 0.13 -0.37 -0.00
6 0.0795 -1346.51 -0.13 -0.44 -0.05
7 0.0849 -1465.73 0.08 -0.51 0.00
8 0.1449 -2892.80 0.01 -2.75 -0.14
9 0.1475 -2957.96 -0.21 -2.75 -0.03
10 0.1476 -2960.60 -0.01 -2.77 -0.02
11 0.1477 -2963.99 -0.14 -2.96 -0.19
12 0.1532 -3101.06 0.14 -3.06 0.01
13 0.1641 -3372.12 -0.27 -3.78 -0.09
14 0.1642 -3375.19 -0.02 -3.84 -0.13
15 0.2652 -5639.68 -0.01 -12.07 -0.06
16 0.2654 -5642.64 -0.05 -12.04 0.01
17 0.3390 -6606.80 -0.07 -20.37 0.00
18 0.3416 -6625.95 -0.06 -20.66 0.01
19 0.3964 -6763.19 -0.02 -27.62 -0.09
20 0.4046 -6739.00 0.37 -28.23 0.33
21 0.9640 4521.72 0.10 -56.17 0.01
22 0.9805 4419.57 0.03 -55.81 0.26
23 0.9831 4398.87 0.06 -55.95 0.09
24 1.0625 3270.50 -0.12 -56.47 -0.08
25 1.0626 3268.02 -0.06 -56.24 0.16
26 1.0650 3222.15 -0.30 -56.72 -0.34
27 1.1251 1875.86 0.09 -58.23 -0.05
28 1.1415 1473.27 -0.02 -58.99 -0.05
29 1.2042 -69.56 0.02 -62.69 0.16
30 1.2043 -71.95 0.03 -62.66 0.21
31 1.2180 -391.21 0.01 -64.01 -0.03
32 1.2753 -1556.45 0.05 -69.06 0.16
33 1.2781 -1603.63 0.04 -69.56 -0.06
34 1.2947 -1867.05 0.04 -71.32 -0.05
35 1.3574 -2498.04 -0.13 -78.31 -0.01
36 2.1108 6507.97 0.06 -114.41 -0.20
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.
15GY56 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.134 43.142 43.126 ecceobj 0.053 0.053 0.053 incobj 0.771 0.771 0.771 qmin 40.190 40.220 40.214 qmax 46.817 46.821 46.792 amean 43.410 43.419 43.402 amin 43.077 43.078 43.067 amax 43.760 43.776 43.751 emean 0.053 0.053 0.053 emin 0.033 0.033 0.033 emax 0.070 0.070 0.070 imean 1.516 1.515 1.518 imin 0.458 0.462 0.452 imax 2.250 2.248 2.251 excite_mean 0.060 0.060 0.060 fracstop 1.000 1.000 1.000 cjmean 3.090 3.090 3.090 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 191.5 191.8 191.4 kozaiamp 180.0 180.0 180.0