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: 15GT55
# Created Tue Apr 1 01:10:24 2025
# Orbit generated from Bernstein formalism
# Fitting 34 observations of 34
# Arc: 2.35y
# First observation: 2015/02/17
# Last observation: 2017/06/25
Preliminary a, adot, b, bdot, g, gdot:
-0.000073 0.033406 0.000011 -0.006919 0.028844 0.000000
# Chi-squared of fit: 11.21 DOF: 62 RMS: 0.10
# Min/Max residuals: -0.31 0.31
# Exact a, adot, b, bdot, g, gdot:
1.861804E-05 3.320181E-02 -3.965681E-06 -6.850307E-03 2.885219E-02 -2.193337E-03
# Covariance matrix:
1.7041E-13 -4.5199E-14 -2.2437E-17 -1.2255E-15 9.0497E-14 8.8497E-14
-4.5199E-14 4.1076E-13 3.3317E-14 -1.2350E-13 1.9097E-13 8.4038E-12
-2.2437E-17 3.3317E-14 1.0309E-13 -8.2699E-14 1.6757E-14 8.8062E-13
-1.2255E-15 -1.2350E-13 -8.2699E-14 1.3323E-13 -6.3559E-14 -3.2540E-12
9.0497E-14 1.9097E-13 1.6757E-14 -6.3559E-14 1.9603E-13 4.3306E-12
8.8497E-14 8.4038E-12 8.8062E-13 -3.2540E-12 4.3306E-12 2.2138E-10
# lat0 lon0 xBary yBary zBary JD0
1.571373 -153.944003 0.833175 0.014561 -0.525747 2457071.093388
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 345.50519 +/- 0.064
Argument of Peri: 197.15503 +/- 0.114
Long of Asc Node: 32.16926 +/- 0.000
Inclination: 11.73300 +/- 0.000
Eccentricity: 0.25252341 +/- 0.0002
Semi-Major Axis: 46.21397826 +/- 0.0052
Time of Perihelion: 2461690.7808 +/- 20.3
Perihelion: 34.54386683 +/- 0.0101
Aphelion: 57.88408969 +/- 0.0114
Period (y) 314.1725 +/- 0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -31.96630693 +/- 0.0005
Ecliptic Y -14.70090901 +/- 0.0002
Ecliptic Z 0.95030253 +/- 0.0000
Ecliptic XDOT 0.00155114 +/- 0.0000
Ecliptic YDOT -0.00275240 +/- 0.0000
Ecliptic ZDOT -0.00065541 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 35.19750814 +/- 0.0004
Geocenter to KBO 34.65941183 +/- 0.0005
# Hcoef: 9.34
The following table shows the complete astrometric record for 15GT55. 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 (15GT55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.59261 13 38 57.013 -08 35 52.27 25.2r 15GT55 568 C~2lVC 2015 02 17.63360 13 38 56.921 -08 35 51.91 24.9r 15GT55 568 C~2lVC 2015 02 20.48657 13 38 50.036 -08 35 16.79 24.9r 15GT55 568 C~2lVC 2015 03 18.57107 13 37 14.840 -08 27 04.58 24.9r 15GT55 568 C~2lVC 2015 03 18.61845 13 37 14.628 -08 27 03.43 24.6r 15GT55 568 C~2lVC 2015 04 11.50958 13 35 13.537 -08 16 42.04 24.9r 15GT55 568 C~2lVC 2015 04 13.37381 13 35 03.538 -08 15 51.20 26.0r 15GT55 568 C~2lVC 2015 04 13.41479 13 35 03.303 -08 15 50.12 25.0r 15GT55 568 C~2lVC 2015 04 13.51735 13 35 02.744 -08 15 47.25 24.4r 15GT55 568 C~2lVC 2015 05 16.28656 13 32 15.157 -08 02 10.66 24.5r 15GT55 568 C~2lVC 2015 05 18.33721 13 32 06.017 -08 01 29.18 24.4r 15GT55 568 C~2lVC 2015 06 20.28725 13 30 22.337 -07 54 46.48 25.1r 15GT55 568 C~2lVC 2015 06 20.32802 13 30 22.267 -07 54 46.24 24.8r 15GT55 568 C~2lVC 2015 06 22.29486 13 30 19.116 -07 54 40.69 24.9r 15GT55 568 C~2lVC 2015 07 12.28879 13 30 09.256 -07 55 56.37 24.8r 15GT55 568 C~2lVC 2015 07 15.27909 13 30 11.348 -07 56 28.53 24.3r 15GT55 568 C~2lVC 2015 07 19.27863 13 30 15.602 -07 57 20.27 25.0r 15GT55 568 C~2lVC 2016 02 04.61431 13 45 54.673 -09 40 22.63 25.1w 15GT55 568 C~2lVC 2016 02 11.59753 13 45 47.085 -09 39 53.97 25.3w 15GT55 568 C~2lVC 2016 03 11.60487 13 44 24.000 -09 33 14.87 24.1w 15GT55 568 C~2lVC 2016 04 03.47362 13 42 35.469 -09 24 13.66 24.7w 15GT55 568 C~2lVC 2016 04 03.47768 13 42 35.439 -09 24 13.52 25.0w 15GT55 568 C~2lVC 2016 04 09.45477 13 42 03.704 -09 21 35.67 24.8w 15GT55 568 C~2lVC 2016 04 09.45883 13 42 03.685 -09 21 35.58 24.8w 15GT55 568 C~2lVC 2016 05 01.46556 13 40 05.415 -09 11 56.26 23.8w 15GT55 568 C~2lVC 2016 05 02.33963 13 40 00.893 -09 11 34.14 25.3w 15GT55 568 C~2lVC 2016 05 07.34298 13 39 35.322 -09 09 32.20 25.4w 15GT55 568 C~2lVC 2016 05 29.32744 13 37 57.777 -09 02 08.32 24.9w 15GT55 568 C~2lVC 2016 06 04.38987 13 37 36.547 -09 00 40.34 25.3w 15GT55 568 C~2lVC 2016 07 07.31590 13 36 39.640 -08 58 26.67 25.2w 15GT55 568 C~2lVC 2017 03 30.49241 13 49 45.298 -10 30 05.56 24.8w 15GT55 568 C~2lVC 2017 05 24.25622 13 45 03.184 -10 07 46.50 24.8w 15GT55 568 C~2lVC 2017 06 25.27303 13 43 27.507 -10 01 31.42 25.2w 15GT55 568 C~2lVC 2017 06 25.28243 13 43 27.483 -10 01 31.58 25.2w 15GT55 568 C~2lVC
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 0.04
2 0.0001 -1.40 0.03 -0.16 -0.03
3 0.0079 -109.31 -0.01 -4.32 -0.00
4 0.0793 -1603.93 -0.14 -56.64 -0.12
5 0.0795 -1607.28 -0.02 -56.71 -0.05
6 0.1449 -3507.61 -0.01 -130.12 -0.02
7 0.1500 -3664.41 0.20 -136.75 0.16
8 0.1501 -3668.05 0.07 -137.01 0.07
9 0.1504 -3676.83 0.09 -137.35 0.16
10 0.2401 -6293.25 0.31 -284.18 0.17
11 0.2457 -6434.91 0.11 -295.18 -0.11
12 0.3359 -8017.59 -0.12 -484.18 -0.18
13 0.3360 -8018.65 -0.11 -484.33 -0.07
14 0.3414 -8064.31 -0.12 -496.34 -0.06
15 0.3962 -8173.04 -0.13 -620.54 -0.08
16 0.4043 -8132.28 -0.06 -639.08 0.05
17 0.4153 -8054.40 -0.02 -664.07 -0.03
18 0.9638 7165.76 -0.31 -1390.81 0.02
19 0.9829 7050.58 0.04 -1404.09 -0.02
20 1.0623 5759.04 0.08 -1470.48 0.02
21 1.1249 4065.01 0.09 -1540.79 0.03
22 1.1249 4064.55 -0.03 -1540.82 0.01
23 1.1413 3569.35 0.05 -1562.21 0.06
24 1.1413 3569.06 0.11 -1562.22 0.06
25 1.2016 1726.70 -0.07 -1652.10 -0.14
26 1.2040 1656.26 0.06 -1655.62 0.18
27 1.2177 1259.08 0.03 -1678.53 0.05
28 1.2779 -248.51 0.11 -1786.98 -0.09
29 1.2944 -573.55 -0.06 -1818.87 -0.09
30 1.3846 -1407.82 -0.09 -1999.99 -0.00
31 2.1133 11419.01 -0.08 -2970.83 0.00
32 2.2633 7042.38 0.09 -3199.28 0.04
33 2.3509 5587.21 0.02 -3354.53 0.09
34 2.3510 5586.94 -0.03 -3354.80 -0.14
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.
15GT55 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 45.696 45.705 45.688 ecceobj 0.245 0.245 0.245 incobj 11.772 11.772 11.772 qmin 33.036 33.596 33.563 qmax 61.260 59.840 60.174 amean 46.269 46.032 46.082 amin 45.061 45.278 45.564 amax 47.508 47.053 47.238 emean 0.261 0.249 0.250 emin 0.235 0.228 0.233 emax 0.293 0.272 0.274 imean 10.421 11.068 10.944 imin 8.510 9.544 10.033 imax 12.342 12.633 11.934 excite_mean 0.318 0.315 0.314 fracstop 1.000 1.000 1.000 cjmean 3.005 3.004 3.005 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 185.5 179.3 180.1 kozaiamp 180.0 180.0 180.0