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: 15GX55
# Created Fri Nov 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 35 observations of 35
# Arc: 2.35y
# First observation: 2015/02/17
# Last observation: 2017/06/24
Preliminary a, adot, b, bdot, g, gdot:
-0.000594 0.020380 -0.000440 -0.027320 0.032138 0.000000
# Chi-squared of fit: 7.98 DOF: 64 RMS: 0.08
# Min/Max residuals: -0.27 0.28
# Exact a, adot, b, bdot, g, gdot:
9.652194E-06 2.063055E-02 -1.416624E-05 -2.907886E-02 3.315772E-02 3.640941E-02
# Covariance matrix:
1.6549E-13 -3.5848E-14 1.8902E-14 -8.5257E-14 1.1864E-13 1.5861E-12
-3.5848E-14 1.1774E-13 1.9494E-14 -8.6153E-14 7.4271E-14 1.5967E-12
1.8902E-14 1.9494E-14 1.2386E-13 -1.7292E-13 4.8252E-14 1.8536E-12
-8.5257E-14 -8.6153E-14 -1.7292E-13 5.2953E-13 -2.1489E-13 -8.0788E-12
1.1864E-13 7.4271E-14 4.8252E-14 -2.1489E-13 2.2821E-13 3.9882E-12
1.5861E-12 1.5967E-12 1.8536E-12 -8.0788E-12 3.9882E-12 1.4932E-10
# lat0 lon0 xBary yBary zBary JD0
2.379410 -153.067931 0.841045 0.021447 -0.512822 2457071.101558
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 2.54631 +/- 0.015
Argument of Peri: 82.65209 +/- 0.003
Long of Asc Node: 27.10341 +/- 0.000
Inclination: 53.26059 +/- 0.001
Eccentricity: 0.92313932 +/- 0.0003
Semi-Major Axis: 192.79368273 +/- 0.7372
Time of Perihelion: 2450154.6441 +/- 1.5
Perihelion: 14.81825382 +/- 0.0817
Aphelion: 370.76911164 +/- 1.4191
Period (y) 2676.9940 +/- 15.36
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -27.70624268 +/- 0.0004
Ecliptic Y -13.13051882 +/- 0.0002
Ecliptic Z 1.25167165 +/- 0.0000
Ecliptic XDOT -0.00199894 +/- 0.0000
Ecliptic YDOT -0.00292994 +/- 0.0000
Ecliptic ZDOT -0.00227408 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 30.68571475 +/- 0.0004
Geocenter to KBO 30.15888596 +/- 0.0004
# Hcoef: 9.41
The following table shows the complete astrometric record for 15GX55. 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 (15GX55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.60078 13 43 25.720 -08 09 32.40 24.4r 15GX55 568 C~2lVC 2015 02 17.64179 13 43 25.566 -08 09 32.16 24.5r 15GX55 568 C~2lVC 2015 02 20.63493 13 43 14.896 -08 09 10.73 24.4r 15GX55 568 C~2lVC 2015 03 18.57924 13 41 04.944 -08 02 55.49 24.2r 15GX55 568 C~2lVC 2015 03 18.62665 13 41 04.649 -08 02 54.52 24.3r 15GX55 568 C~2lVC 2015 03 20.58351 13 40 52.609 -08 02 15.39 24.2r 15GX55 568 C~2lVC 2015 04 11.51839 13 38 25.268 -07 54 05.68 24.1r 15GX55 568 C~2lVD 2015 04 13.38199 13 38 12.160 -07 53 22.35 24.1r 15GX55 568 C~2lVD 2015 04 13.44320 13 38 11.727 -07 53 20.93 23.9r 15GX55 568 C~2lVD 2015 04 13.52553 13 38 11.140 -07 53 19.00 24.2r 15GX55 568 C~2lVD 2015 04 19.49336 13 37 29.034 -07 51 01.20 24.0r 15GX55 568 C~2lVD 2015 04 19.54045 13 37 28.711 -07 50 59.98 24.1r 15GX55 568 C~2lVD 2015 05 18.33721 13 34 18.158 -07 41 39.38 24.1r 15GX55 568 C~2lVD 2015 06 20.28725 13 31 51.048 -07 38 30.92 24.6r 15GX55 568 C~2lVD 2015 06 20.32802 13 31 50.932 -07 38 31.02 24.5r 15GX55 568 C~2lVD 2015 07 20.27721 13 31 19.159 -07 45 40.62 24.2r 15GX55 568 C~2lVD 2016 02 04.61430 13 45 58.544 -10 03 59.55 25.0w 15GX55 568 C~2lVD 2016 02 04.62644 13 45 58.521 -10 04 00.03 25.2w 15GX55 568 C~2lVD 2016 02 04.63139 13 45 58.506 -10 03 59.65 25.1w 15GX55 568 C~2lVD 2016 02 11.59752 13 45 43.858 -10 04 19.66 25.1w 15GX55 568 C~2lVD 2016 03 11.60894 13 43 45.584 -10 00 32.19 24.4w 15GX55 568 C~2lVD 2016 04 03.47768 13 41 25.002 -09 53 17.77 24.6w 15GX55 568 C~2lVD 2016 04 09.45883 13 40 44.616 -09 51 04.89 24.4w 15GX55 568 C~2lVD 2016 05 02.34368 13 38 09.399 -09 42 35.04 24.8w 15GX55 568 C~2lVD 2016 05 02.35991 13 38 09.301 -09 42 34.72 25.1w 15GX55 568 C~2lVD 2016 05 07.34704 13 37 37.055 -09 40 52.89 24.7w 15GX55 568 C~2lVD 2016 05 07.36327 13 37 36.960 -09 40 52.64 24.7w 15GX55 568 C~2lVD 2016 05 28.31649 13 35 37.073 -09 35 12.61 24.4w 15GX55 568 C~2lVD 2016 05 29.32340 13 35 32.111 -09 35 00.78 24.9w 15GX55 568 C~2lVD 2016 06 27.31141 13 33 51.230 -09 33 17.67 24.5w 15GX55 568 C~2lVD 2016 07 07.30770 13 33 37.432 -09 34 40.45 24.8w 15GX55 568 C~2lVD 2017 03 29.48279 13 44 00.543 -11 43 32.90 24.7w 15GX55 568 C~2lVD 2017 03 29.50431 13 44 00.393 -11 43 32.44 23.8w 15GX55 568 C~2lVD 2017 05 24.25153 13 38 08.898 -11 24 19.28 24.9w 15GX55 568 C~2lVD 2017 06 24.29454 13 36 09.032 -11 19 45.76 24.8w 15GX55 568 C~2lVD
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 -2.22 -0.09 -0.60 -0.01
3 0.0083 -157.81 0.07 -37.36 -0.05
4 0.0793 -2093.78 -0.10 -379.93 -0.04
5 0.0795 -2098.22 -0.13 -380.60 -0.02
6 0.0848 -2279.17 -0.05 -408.41 -0.02
7 0.1449 -4497.97 -0.09 -740.59 0.04
8 0.1500 -4695.33 -0.09 -770.54 -0.04
9 0.1502 -4701.85 -0.01 -771.54 -0.02
10 0.1504 -4710.68 0.02 -772.90 0.01
11 0.1667 -5344.22 0.14 -870.60 -0.00
12 0.1668 -5349.14 0.28 -871.20 0.20
13 0.2457 -8194.96 -0.02 -1375.93 -0.12
14 0.3359 -10304.85 -0.01 -1997.64 -0.02
15 0.3360 -10306.42 -0.00 -1998.36 0.06
16 0.4180 -10590.29 -0.06 -2571.57 0.02
17 0.9638 4570.44 -0.01 -5606.63 0.13
18 0.9638 4570.29 0.12 -5607.20 -0.27
19 0.9638 4569.95 -0.11 -5606.92 0.08
20 0.9829 4374.84 0.09 -5702.82 -0.01
21 1.0623 2660.88 -0.13 -6114.74 -0.00
22 1.1249 565.22 -0.00 -6454.56 -0.00
23 1.1413 -39.75 -0.03 -6545.37 0.05
24 1.2040 -2364.95 0.02 -6898.26 -0.01
25 1.2040 -2366.42 0.17 -6898.48 0.02
26 1.2176 -2848.11 -0.02 -6976.23 -0.04
27 1.2177 -2849.51 0.15 -6976.50 -0.06
28 1.2751 -4626.87 0.04 -7303.39 0.05
29 1.2778 -4699.64 -0.02 -7319.08 0.07
30 1.3572 -6129.25 -0.04 -7767.23 -0.08
31 1.3846 -6289.50 -0.05 -7919.05 -0.05
32 2.1106 5084.69 0.10 -11820.21 0.04
33 2.1106 5082.46 -0.08 -11820.57 0.02
34 2.2632 -161.72 -0.05 -12604.67 0.08
35 2.3482 -1907.12 -0.06 -12990.68 -0.08
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.
15GX55 quality flag:2 Type: CENTAURR CENTAURS CENTAURR axisobj 189.534 191.714 187.412 ecceobj 0.922 0.923 0.921 incobj 53.342 53.342 53.342 qmin 13.792 13.799 13.927 qmax 399.188 469.043 360.032 amean 176.073 205.458 182.596 amin 156.995 174.321 176.820 amax 207.191 243.496 187.412 emean 0.905 0.915 0.919 emin 0.885 0.886 0.914 emax 0.929 0.931 0.923 imean 54.906 56.132 53.085 imin 52.691 52.743 52.777 imax 57.278 59.483 53.455 excite_mean 1.220 1.235 1.218 fracstop 0.562 1.000 0.006 cjmean 1.349 1.317 1.314 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 78.9 75.6 82.4 kozaiamp 4.7 7.9 1.1