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: 15GY55
# Created Wed Dec 25 02:10:15 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 48 observations of 48
# Arc: 6.24y
# First observation: 2015/02/17
# Last observation: 2021/05/14
# Chi-squared of fit: 7.63 DOF: 90 RMS: 0.07
# Min/Max residuals: -0.18 0.28
# Exact a, adot, b, bdot, g, gdot:
2.114949E-05 3.728807E-02 -1.495784E-06 -2.580355E-03 2.797947E-02 -1.712508E-03
# Covariance matrix:
1.3670E-13 -6.6897E-14 -2.7500E-15 4.8773E-15 7.4459E-14 -2.9075E-13
-6.6897E-14 1.8287E-13 5.4364E-15 -1.3866E-14 2.8220E-14 8.2263E-13
-2.7500E-15 5.4364E-15 4.8930E-14 -9.7552E-15 -3.3793E-16 2.5443E-14
4.8773E-15 -1.3866E-14 -9.7552E-15 5.6474E-15 -1.7123E-15 -6.4118E-14
7.4459E-14 2.8220E-14 -3.3793E-16 -1.7123E-15 1.0515E-13 9.9921E-14
-2.9075E-13 8.2263E-13 2.5443E-14 -6.4118E-14 9.9921E-14 3.8045E-12
# lat0 lon0 xBary yBary zBary JD0
2.786980 -153.135906 0.840398 0.025145 -0.513714 2457071.105668
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 358.39465 +/- 0.001
Argument of Peri: 154.62354 +/- 0.008
Long of Asc Node: 60.62778 +/- 0.001
Inclination: 4.76963 +/- 0.000
Eccentricity: 0.64767171 +/- 0.0001
Semi-Major Axis: 102.34170409 +/- 0.0179
Time of Perihelion: 2458756.8341 +/- 98.8
Perihelion: 36.05787768 +/- 0.0086
Aphelion: 168.62553049 +/- 0.0301
Period (y) 1035.3500 +/- 0.27
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -32.68695511 +/- 0.0004
Ecliptic Y -15.61394467 +/- 0.0002
Ecliptic Z 1.73775354 +/- 0.0000
Ecliptic XDOT 0.00178347 +/- 0.0000
Ecliptic YDOT -0.00319044 +/- 0.0000
Ecliptic ZDOT -0.00026025 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 36.26645508 +/- 0.0003
Geocenter to KBO 35.74054668 +/- 0.0004
# Hcoef: 7.23
The following table shows the complete astrometric record for 15GY55. 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 (15GY55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.60489 13 43 45.734 -07 45 14.94 22.7r 15GY55 568 C~2lVD 2015 02 17.64586 13 43 45.654 -07 45 14.36 22.8r 15GY55 568 C~2lVD 2015 02 20.63905 13 43 39.681 -07 44 31.82 22.8r 15GY55 568 C~2lVD 2015 03 18.58338 13 42 16.497 -07 35 45.01 22.8r 15GY55 568 C~2lVD 2015 03 18.63265 13 42 16.288 -07 35 43.81 22.8r 15GY55 568 C~2lVD 2015 03 20.58759 13 42 08.122 -07 34 55.12 22.8r 15GY55 568 C~2lVD 2015 04 11.52247 13 40 25.780 -07 25 08.98 22.6r 15GY55 568 C~2lVD 2015 04 13.38609 13 40 16.551 -07 24 17.90 22.7r 15GY55 568 C~2lVD 2015 04 13.44737 13 40 16.241 -07 24 16.20 22.5r 15GY55 568 C~2lVD 2015 04 13.45145 13 40 16.224 -07 24 16.07 22.6r 15GY55 568 C~2lVD 2015 04 13.45555 13 40 16.199 -07 24 15.95 22.6r 15GY55 568 C~2lVD 2015 04 13.52960 13 40 15.821 -07 24 13.93 22.7r 15GY55 568 C~2lVD 2015 04 19.29039 13 39 47.11 -07 21 36.8 23.3V 15GY55 W84 C~2zsP 2015 04 19.49744 13 39 46.088 -07 21 31.62 22.5r 15GY55 568 C~2lVD 2015 04 19.54452 13 39 45.848 -07 21 30.51 22.8r 15GY55 568 C~2lVD 2015 04 19.55519 13 39 45.794 -07 21 30.23 22.8r 15GY55 568 C~2lVD 2015 04 21.29129 13 39 37.18 -07 20 43.2 15GY55 W84 C~2zsP 2015 04 22.29094 13 39 32.20 -07 20 16.5 15GY55 W84 C~2zsP 2015 05 18.34948 13 37 31.705 -07 10 02.66 22.7r 15GY55 568 C~2lVD 2015 06 20.29948 13 35 55.374 -07 03 35.37 22.8r 15GY55 568 C~2lVD 2015 06 20.34029 13 35 55.305 -07 03 35.23 22.9r 15GY55 568 C~2lVD 2015 06 22.34439 13 35 52.387 -07 03 30.29 22.7r 15GY55 568 C~2lVD 2015 07 14.29673 13 35 46.034 -07 05 11.00 22.8r 15GY55 568 C~2lVD 2015 07 20.28959 13 35 52.705 -07 06 27.98 22.9r 15GY55 568 C~2lVD 2016 02 04.52611 13 51 51.577 -08 41 10.66 23.2w 15GY55 568 C~2lVD 2016 02 04.53313 13 51 51.575 -08 41 10.64 23.1w 15GY55 568 C~2lVD 2016 02 04.58829 13 51 51.551 -08 41 10.36 23.1w 15GY55 568 C~2lVD 2016 02 04.64815 13 51 51.523 -08 41 10.04 23.0w 15GY55 568 C~2lVD 2016 03 11.61299 13 50 37.441 -08 32 48.55 23.0w 15GY55 568 C~2lVD 2016 05 02.35180 13 46 37.081 -08 10 47.00 22.9w 15GY55 568 C~2lVD 2016 05 29.33555 13 44 42.015 -08 01 37.20 23.0w 15GY55 568 C~2lVD 2016 06 04.39796 13 44 22.112 -08 00 13.72 22.9w 15GY55 568 C~2lVD 2016 06 27.32960 13 43 34.576 -07 57 50.57 23.2w 15GY55 568 C~2lVD 2016 07 07.31994 13 43 29.284 -07 58 20.64 23.1w 15GY55 568 C~2lVD 2017 03 30.52059 13 57 21.923 -09 19 48.42 23.0w 15GY55 568 C~2lVD 2017 03 31.45585 13 57 17.628 -09 19 24.75 22.9w 15GY55 568 C~2lVD 2021 05 13.98821 14 26 24.77 -12 33 53.0 23.2V 15GY55 W84 C~4n9b 2021 05 14.00889 14 26 24.66 -12 33 52.5 15GY55 W84 C~4n9b 2021 05 14.01234 14 26 24.65 -12 33 52.5 15GY55 W84 C~4n9b 2021 05 14.01580 14 26 24.63 -12 33 52.3 15GY55 W84 C~4n9b 2021 05 14.03998 14 26 24.50 -12 33 51.8 15GY55 W84 C~4n9b 2021 05 14.04345 14 26 24.49 -12 33 51.8 15GY55 W84 C~4n9b 2021 05 14.06415 14 26 24.39 -12 33 51.4 15GY55 W84 C~4n9b 2021 05 14.06763 14 26 24.37 -12 33 51.3 15GY55 W84 C~4n9b 2021 05 14.07110 14 26 24.35 -12 33 51.1 15GY55 W84 C~4n9b 2021 05 14.09866 14 26 24.21 -12 33 50.6 15GY55 W84 C~4n9b 2021 05 14.12281 14 26 24.09 -12 33 50.1 15GY55 W84 C~4n9b 2021 05 14.14690 14 26 23.97 -12 33 49.6 15GY55 W84 C~4n9b
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 -0.01 0.00 0.01
2 0.0001 0.00 -0.02 0.00 0.04
3 0.0083 0.00 -0.04 0.00 -0.00
4 0.0793 0.00 -0.01 0.00 -0.00
5 0.0795 0.00 -0.03 0.00 -0.02
6 0.0848 0.00 -0.02 0.00 -0.00
7 0.1449 0.00 0.00 0.00 -0.04
8 0.1500 0.00 0.01 0.00 -0.03
9 0.1502 0.00 0.02 0.00 -0.01
10 0.1502 0.00 0.07 0.00 0.01
11 0.1502 0.00 0.01 0.00 0.02
12 0.1504 0.00 -0.04 0.00 0.00
13 0.1661 0.00 -0.18 0.00 0.26
14 0.1667 0.00 -0.06 0.00 0.07
15 0.1668 0.00 -0.08 0.00 -0.09
16 0.1669 0.00 -0.08 0.00 -0.10
17 0.1716 0.00 0.28 0.00 0.16
18 0.1744 0.00 0.06 0.00 0.22
19 0.2457 0.00 0.05 0.00 0.02
20 0.3359 0.00 0.06 0.00 -0.04
21 0.3360 0.00 0.03 0.00 -0.03
22 0.3415 0.00 0.04 0.00 0.02
23 0.4016 0.00 -0.03 0.00 0.04
24 0.4180 0.00 0.02 0.00 -0.03
25 0.9635 0.00 0.07 0.00 -0.03
26 0.9635 0.00 0.08 0.00 -0.04
27 0.9637 0.00 0.02 0.00 -0.01
28 0.9638 0.00 -0.06 0.00 0.03
29 1.0623 0.00 -0.08 0.00 -0.06
30 1.2040 0.00 0.05 0.00 -0.04
31 1.2778 0.00 -0.06 0.00 -0.06
32 1.2944 0.00 -0.05 0.00 -0.03
33 1.3572 0.00 -0.11 0.00 -0.10
34 1.3846 0.00 -0.09 0.00 -0.04
35 2.1134 0.00 -0.04 0.00 -0.07
36 2.1160 0.00 -0.03 0.00 -0.01
37 6.2351 0.00 0.06 0.00 -0.01
38 6.2352 0.00 -0.04 0.00 0.04
39 6.2352 0.00 0.07 0.00 -0.03
40 6.2352 0.00 0.03 0.00 0.09
41 6.2353 0.00 -0.10 0.00 0.07
42 6.2353 0.00 0.01 0.00 -0.00
43 6.2353 0.00 0.07 0.00 -0.05
44 6.2354 0.00 0.03 0.00 -0.03
45 6.2354 0.00 -0.01 0.00 0.10
46 6.2354 0.00 -0.03 0.00 -0.00
47 6.2355 0.00 -0.01 0.00 -0.03
48 6.2356 0.00 0.01 0.00 -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.
15GY55 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 99.408 99.407 99.410 ecceobj 0.637 0.637 0.637 incobj 4.775 4.775 4.775 qmin 35.040 35.003 35.008 qmax 177.232 178.507 178.366 amean 101.965 102.585 102.159 amin 98.769 98.746 98.562 amax 106.676 107.237 107.201 emean 0.646 0.649 0.647 emin 0.632 0.631 0.631 emax 0.663 0.665 0.664 imean 3.502 3.449 3.486 imin 3.070 3.175 3.175 imax 3.904 3.906 3.967 excite_mean 0.649 0.651 0.650 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.099 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 196.7 165.4 187.4 kozaiamp 179.9 180.0 179.9