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: 15GU55
# Created Thu Apr 25 01:17:04 2024
# Orbit generated from Bernstein formalism
# Fitting 50 observations of 50
# Arc: 3.33y
# First observation: 2015/02/16
# Last observation: 2018/06/18
Preliminary a, adot, b, bdot, g, gdot:
-0.000141 0.034503 -0.000040 0.015848 0.028282 0.000000
# Chi-squared of fit: 8.05 DOF: 94 RMS: 0.07
# Min/Max residuals: -0.19 0.21
# Exact a, adot, b, bdot, g, gdot:
1.953465E-05 3.412286E-02 8.248809E-06 1.559440E-02 2.827620E-02 -4.251062E-03
# Covariance matrix:
1.0377E-13 -6.3197E-14 1.2037E-14 -4.1771E-14 5.2635E-14 -7.9886E-13
-6.3197E-14 2.5205E-13 -4.8562E-14 1.6688E-13 4.8189E-14 3.1874E-12
1.2037E-14 -4.8562E-14 6.1262E-14 -5.7339E-14 -5.7109E-15 -6.8566E-13
-4.1771E-14 1.6688E-13 -5.7339E-14 1.4434E-13 1.9075E-14 2.3582E-12
5.2635E-14 4.8189E-14 -5.7109E-15 1.9075E-14 9.2915E-14 3.6298E-13
-7.9886E-13 3.1874E-12 -6.8566E-13 2.3582E-12 3.6298E-13 4.5047E-11
# lat0 lon0 xBary yBary zBary JD0
0.122426 -156.821158 0.816199 0.001326 -0.551588 2457070.018798
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 356.55806 +/- 0.004
Argument of Peri: 19.83025 +/- 0.026
Long of Asc Node: 201.61133 +/- 0.000
Inclination: 24.60695 +/- 0.000
Eccentricity: 0.63359356 +/- 0.0001
Semi-Major Axis: 95.86712163 +/- 0.0145
Time of Perihelion: 2460348.4633 +/- 4.1
Perihelion: 35.12633051 +/- 0.0082
Aphelion: 156.60791275 +/- 0.0245
Period (y) 938.6696 +/- 0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -33.34175988 +/- 0.0004
Ecliptic Y -13.38671262 +/- 0.0001
Ecliptic Z 0.07585298 +/- 0.0000
Ecliptic XDOT 0.00167814 +/- 0.0000
Ecliptic YDOT -0.00287954 +/- 0.0000
Ecliptic ZDOT 0.00150914 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.92885721 +/- 0.0003
Geocenter to KBO 35.36543606 +/- 0.0004
# Hcoef: 7.61
The following table shows the complete astrometric record for 15GU55. 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 (15GU55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 16.51802 13 25 58.172 -08 53 38.06 23.5r 15GU55 568 C~2lVC 2015 02 16.52314 13 25 58.153 -08 53 37.99 23.4r 15GU55 568 C~2lVC 2015 02 17.48578 13 25 56.129 -08 53 16.64 23.1r 15GU55 568 C~2lVC 2015 02 17.52702 13 25 56.032 -08 53 15.75 23.1r 15GU55 568 C~2lVC 2015 02 20.45766 13 25 49.276 -08 52 07.51 23.3r 15GU55 568 C~2lVC 2015 03 17.43316 13 24 24.206 -08 39 40.93 23.4r 15GU55 568 C~2lVC 2015 03 18.45231 13 24 19.870 -08 39 05.45 23.1r 15GU55 568 C~2lVC 2015 03 18.50553 13 24 19.636 -08 39 03.57 22.9r 15GU55 568 C~2lVC 2015 04 11.37454 13 22 28.031 -08 24 08.68 23.2r 15GU55 568 C~2lVC 2015 04 11.39801 13 22 27.898 -08 24 07.89 22.9r 15GU55 568 C~2lVC 2015 04 12.35069 13 22 23.247 -08 23 31.05 22.9r 15GU55 568 C~2lVC 2015 04 12.39167 13 22 23.041 -08 23 29.41 22.8r 15GU55 568 C~2lVC 2015 04 12.43732 13 22 22.809 -08 23 27.68 22.7r 15GU55 568 C~2lVC 2015 04 13.10868 13 22 19.53 -08 23 01.3 23.4V 15GU55 W84 C~3jdt 2015 04 13.20115 13 22 19.06 -08 22 57.8 15GU55 W84 C~3jdt 2015 04 13.29683 13 22 18.59 -08 22 54.0 15GU55 W84 C~3jdt 2015 04 14.44843 13 22 12.946 -08 22 09.51 23.3r 15GU55 568 C~2lVC 2015 04 16.38638 13 22 03.474 -08 20 54.43 22.8r 15GU55 568 C~2lVC 2015 04 18.40224 13 21 53.629 -08 19 36.50 22.8r 15GU55 568 C~2lVC 2015 04 18.45015 13 21 53.388 -08 19 34.63 22.9r 15GU55 568 C~2lVC 2015 05 16.24826 13 19 49.282 -08 02 51.23 23.0r 15GU55 568 C~2lVC 2015 05 25.35722 13 19 17.000 -07 58 14.25 23.0r 15GU55 568 C~2lVC 2015 05 25.40100 13 19 16.853 -07 58 12.99 22.9r 15GU55 568 C~2lVC 2015 06 21.30955 13 18 20.120 -07 48 32.11 23.4r 15GU55 568 C~2lVC 2015 06 22.26586 13 18 19.327 -07 48 18.95 23.4r 15GU55 568 C~2lVC 2015 07 12.25999 13 18 23.490 -07 45 51.48 23.1r 15GU55 568 C~2lVC 2015 07 19.24937 13 18 34.498 -07 45 58.08 23.0r 15GU55 568 C~2lVC 2015 07 19.29173 13 18 34.579 -07 45 58.21 23.2r 15GU55 568 C~2lVC 2016 02 04.57138 13 34 57.803 -08 50 41.08 23.6w 15GU55 568 C~2lVC 2016 02 10.55937 13 34 52.170 -08 49 01.22 23.3w 15GU55 568 C~2lVC 2016 02 10.60896 13 34 52.101 -08 49 00.29 23.2w 15GU55 568 C~2lVC 2016 02 11.58117 13 34 50.829 -08 48 41.99 23.3w 15GU55 568 C~2lVC 2016 03 12.48022 13 33 29.902 -08 35 21.74 23.3w 15GU55 568 C~2lVC 2016 04 03.44126 13 31 53.006 -08 22 07.17 23.1w 15GU55 568 C~2lVC 2016 04 09.42106 13 31 23.935 -08 18 17.46 23.0w 15GU55 568 C~2lVC 2016 05 01.36857 13 29 37.578 -08 04 26.36 23.4w 15GU55 568 C~2lVC 2016 05 02.31122 13 29 33.229 -08 03 52.34 23.1w 15GU55 568 C~2lVC 2016 05 06.32100 13 29 15.048 -08 01 29.84 23.5w 15GU55 568 C~2lVC 2017 02 24.64707 13 43 13.057 -08 35 56.82 15GU55 568 C~2lVC 2017 03 29.46871 13 41 12.124 -08 17 58.55 23.3w 15GU55 568 C~2lVC 2017 03 29.47339 13 41 12.102 -08 17 58.20 15GU55 568 C~2lVC 2017 05 18.26658 13 37 17.805 -07 47 48.23 23.6w 15GU55 568 C~2lVC 2018 06 16.98780 13 44 40.58 -07 28 11.0 23.7V 15GU55 W84 C~30Ln 2018 06 17.01195 13 44 40.53 -07 28 10.7 23.6V 15GU55 W84 C~30Ln 2018 06 17.06445 13 44 40.43 -07 28 09.7 15GU55 W84 C~30Ln 2018 06 17.07999 13 44 40.39 -07 28 09.6 15GU55 W84 C~30Ln 2018 06 17.98569 13 44 38.67 -07 27 55.5 15GU55 W84 C~30Ln 2018 06 18.00494 13 44 38.64 -07 27 55.1 15GU55 W84 C~30Ln 2018 06 18.09717 13 44 38.45 -07 27 53.9 15GU55 W84 C~30Ln 2018 06 18.11648 13 44 38.41 -07 27 53.6 15GU55 W84 C~30Ln
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 0.10
2 0.0000 -0.29 -0.19 -0.04 0.02
3 0.0026 -36.05 0.03 8.69 0.08
4 0.0028 -37.72 -0.01 8.99 0.02
5 0.0108 -155.99 -0.08 35.32 -0.05
6 0.0792 -1604.07 0.02 261.28 0.09
7 0.0820 -1676.94 -0.05 270.36 -0.04
8 0.0821 -1680.86 -0.07 270.82 -0.03
9 0.1475 -3550.77 0.20 486.27 0.18
10 0.1475 -3552.89 0.02 486.27 -0.02
11 0.1501 -3630.69 0.21 494.77 -0.07
12 0.1502 -3634.14 0.17 495.15 -0.02
13 0.1504 -3637.98 0.14 495.48 -0.08
14 0.1522 -3692.98 0.11 501.84 0.04
15 0.1525 -3700.76 0.02 502.50 -0.09
16 0.1527 -3708.65 0.09 503.43 0.03
17 0.1559 -3802.98 -0.07 513.53 0.01
18 0.1612 -3961.46 -0.01 530.86 0.02
19 0.1667 -4126.15 -0.13 548.76 -0.02
20 0.1668 -4130.17 -0.17 549.16 -0.01
21 0.2429 -6215.47 -0.02 792.58 -0.02
22 0.2679 -6764.32 -0.01 870.23 -0.01
23 0.2680 -6766.82 -0.04 870.58 -0.01
24 0.3417 -7767.19 -0.08 1093.90 0.03
25 0.3443 -7783.07 -0.03 1101.69 0.04
26 0.3990 -7780.96 -0.01 1261.72 -0.05
27 0.4182 -7626.58 -0.07 1316.90 -0.00
28 0.4183 -7625.41 -0.04 1317.23 0.01
29 0.9666 7377.33 0.00 3103.74 -0.02
30 0.9830 7263.04 0.07 3166.32 -0.04
31 0.9831 7261.75 0.04 3166.81 -0.04
32 0.9858 7237.49 -0.03 3176.98 -0.03
33 1.0677 5826.71 -0.01 3483.87 -0.01
34 1.1278 4196.92 -0.02 3696.95 -0.04
35 1.1442 3711.04 -0.02 3752.41 -0.02
36 1.2042 1936.42 0.03 3945.12 0.03
37 1.2068 1863.83 0.10 3952.99 -0.01
38 1.2178 1560.23 0.06 3986.08 -0.03
39 2.0236 13924.25 -0.07 6596.80 -0.05
40 2.1135 11853.20 0.05 6955.43 -0.08
41 2.1135 11852.77 -0.01 6955.64 0.09
42 2.2498 7942.57 0.00 7380.21 0.01
43 3.3305 13680.93 -0.04 10875.13 0.03
44 3.3306 13680.12 -0.01 10875.14 -0.05
45 3.3307 13678.37 0.03 10875.54 0.15
46 3.3308 13677.77 -0.03 10875.42 -0.03
47 3.3332 13648.67 -0.01 10879.35 0.02
48 3.3333 13648.11 0.06 10879.57 0.16
49 3.3336 13645.02 -0.00 10879.67 -0.09
50 3.3336 13644.36 -0.04 10879.73 -0.10
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.
15GU55 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 93.533 93.568 93.498 ecceobj 0.625 0.625 0.625 incobj 24.690 24.690 24.689 qmin 33.742 32.908 33.293 qmax 162.408 165.974 161.012 amean 95.642 95.790 94.898 amin 93.298 93.004 92.873 amax 98.519 100.124 98.076 emean 0.637 0.640 0.633 emin 0.621 0.621 0.615 emax 0.649 0.660 0.650 imean 24.191 23.851 24.370 imin 23.916 22.636 23.204 imax 25.006 25.197 25.832 excite_mean 0.757 0.757 0.755 fracstop 1.000 1.000 1.000 cjmean 2.821 2.821 2.821 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 91.7 129.0 121.5 kozaiamp 67.2 109.4 105.8