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: 15GJ55
# Created Sun Dec 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 28 observations of 28
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/30
Preliminary a, adot, b, bdot, g, gdot:
-0.000152 0.030629 0.000003 -0.001928 0.027472 0.000000
# Chi-squared of fit: 5.18 DOF: 50 RMS: 0.08
# Min/Max residuals: -0.17 0.27
# Exact a, adot, b, bdot, g, gdot:
1.726634E-05 3.049751E-02 -1.304209E-06 -1.926034E-03 2.752681E-02 2.670951E-03
# Covariance matrix:
1.9109E-13 1.2514E-14 3.5470E-17 -6.3649E-15 1.6095E-13 2.1239E-12
1.2514E-14 4.8113E-13 2.8812E-15 -2.8501E-14 3.4064E-13 9.1800E-12
3.5470E-17 2.8812E-15 1.1756E-13 -9.0869E-14 1.6196E-15 8.4171E-14
-6.3649E-15 -2.8501E-14 -9.0869E-14 1.2772E-13 -2.4588E-14 -7.5871E-13
1.6095E-13 3.4064E-13 1.6196E-15 -2.4588E-14 4.1479E-13 8.0249E-12
2.1239E-12 9.1800E-12 8.4171E-14 -7.5871E-13 8.0249E-12 2.4347E-10
# lat0 lon0 xBary yBary zBary JD0
1.626491 -154.230850 0.830532 0.015185 -0.529895 2457071.093388
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 18.17092 +/- 0.114
Argument of Peri: 129.73679 +/- 0.171
Long of Asc Node: 48.64238 +/- 0.004
Inclination: 3.90937 +/- 0.001
Eccentricity: 0.17546403 +/- 0.0003
Semi-Major Axis: 44.03808156 +/- 0.0048
Time of Perihelion: 2451682.6521 +/- 33.7
Perihelion: 36.31098208 +/- 0.0124
Aphelion: 51.76518104 +/- 0.0131
Period (y) 292.2475 +/- 0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -33.54351889 +/- 0.0008
Ecliptic Y -15.26968744 +/- 0.0004
Ecliptic Z 1.03108887 +/- 0.0000
Ecliptic XDOT 0.00107104 +/- 0.0000
Ecliptic YDOT -0.00285505 +/- 0.0000
Ecliptic ZDOT -0.00018386 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 36.86996282 +/- 0.0007
Geocenter to KBO 36.32821678 +/- 0.0008
# Hcoef: 8.29
The following table shows the complete astrometric record for 15GJ55. 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 (15GJ55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.59261 13 37 56.981 -08 26 33.84 24.0r 15GJ55 568 C~2lVA 2015 02 17.63360 13 37 56.884 -08 26 33.27 23.9r 15GJ55 568 C~2lVA 2015 02 20.62674 13 37 49.959 -08 25 49.24 24.0r 15GJ55 568 C~2lVA 2015 03 18.57107 13 36 19.712 -08 16 46.58 24.1r 15GJ55 568 C~2lVA 2015 03 18.61845 13 36 19.505 -08 16 45.37 24.3r 15GJ55 568 C~2lVA 2015 03 20.57526 13 36 10.895 -08 15 54.96 23.7r 15GJ55 568 C~2lVA 2015 04 11.50958 13 34 24.579 -08 05 46.08 23.9r 15GJ55 568 C~2lVA 2015 04 13.37381 13 34 15.097 -08 04 52.69 24.5r 15GJ55 568 C~2lVA 2015 04 13.41479 13 34 14.880 -08 04 51.47 23.8r 15GJ55 568 C~2lVA 2015 04 13.51735 13 34 14.345 -08 04 48.57 23.8r 15GJ55 568 C~2lVA 2015 04 19.41451 13 33 44.243 -08 02 00.21 23.7r 15GJ55 568 C~2lVA 2015 04 19.54875 13 33 43.555 -08 01 56.55 22.7r 15GJ55 568 C~2lVA 2015 05 18.33721 13 31 27.230 -07 49 39.60 23.9r 15GJ55 568 C~2lVA 2015 07 20.27721 13 29 46.032 -07 43 30.06 24.0r 15GJ55 568 C~2lVA 2016 02 04.61026 13 44 40.949 -09 12 27.55 24.5w 15GJ55 568 C~2lVA 2016 02 11.59334 13 44 33.613 -09 11 36.10 24.0w 15GJ55 568 C~2lVA 2016 03 11.60487 13 43 14.557 -09 03 38.98 24.3w 15GJ55 568 C~2lVA 2016 04 03.47362 13 41 31.893 -08 53 53.94 24.2w 15GJ55 568 C~2lVA 2016 04 09.45477 13 41 01.909 -08 51 06.66 24.3w 15GJ55 568 C~2lVA 2016 05 02.33963 13 39 06.197 -08 40 34.67 24.3w 15GJ55 568 C~2lVA 2016 05 07.34298 13 38 42.139 -08 38 26.41 24.0w 15GJ55 568 C~2lVA 2016 05 29.32744 13 37 10.598 -08 30 35.56 23.5w 15GJ55 568 C~2lVA 2016 06 04.38987 13 36 50.745 -08 28 59.65 24.2w 15GJ55 568 C~2lVA 2016 06 27.32010 13 36 03.520 -08 25 44.89 24.2w 15GJ55 568 C~2lVA 2016 06 27.32513 13 36 03.519 -08 25 45.04 24.6w 15GJ55 568 C~2lVA 2016 07 07.31590 13 35 58.240 -08 25 51.05 24.3w 15GJ55 568 C~2lVA 2017 02 27.64150 13 50 23.966 -09 51 15.36 15GJ55 568 C~2lVA 2017 03 30.49709 13 48 22.953 -09 39 50.47 24.2w 15GJ55 568 C~2lVA
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 0.05 0.00 0.04
2 0.0001 -1.55 -0.00 0.01 0.02
3 0.0083 -113.27 -0.04 3.84 0.11
4 0.0793 -1558.26 -0.03 23.83 -0.04
5 0.0795 -1561.56 0.02 23.84 -0.03
6 0.0848 -1698.96 0.01 24.40 0.06
7 0.1449 -3391.08 -0.17 17.47 -0.06
8 0.1500 -3541.71 0.00 15.90 -0.07
9 0.1501 -3545.16 -0.07 15.86 -0.05
10 0.1504 -3553.62 -0.08 15.67 -0.10
11 0.1665 -4031.46 0.10 9.51 0.01
12 0.1669 -4042.32 0.27 9.19 -0.09
13 0.2457 -6198.22 -0.08 -44.53 0.07
14 0.4180 -7734.81 -0.01 -251.82 0.02
15 0.9638 6579.87 0.02 -413.12 0.05
16 0.9829 6459.91 0.03 -403.96 -0.00
17 1.0623 5194.85 -0.15 -378.17 0.07
18 1.1249 3564.38 -0.04 -378.88 0.08
19 1.1413 3089.46 0.00 -382.84 0.03
20 1.2040 1261.35 0.23 -412.43 -0.02
21 1.2177 882.34 0.00 -421.84 0.06
22 1.2779 -553.78 0.07 -474.66 0.02
23 1.2944 -863.04 -0.02 -492.11 -0.05
24 1.3572 -1586.65 -0.09 -565.02 0.05
25 1.3572 -1586.61 0.04 -565.16 -0.07
26 1.3846 -1657.41 -0.07 -599.22 -0.00
27 2.0289 12162.24 0.00 -782.60 -0.08
28 2.1134 10241.02 -0.01 -776.71 -0.01
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.
15GJ55 quality flag:2 Type: 7:4EEE SCATNEAR 7:4EEE axisobj 43.571 43.590 43.553 ecceobj 0.166 0.167 0.166 incobj 3.918 3.918 3.918 qmin 35.857 35.967 35.820 qmax 52.218 52.209 52.268 amean 43.726 43.702 43.727 amin 43.216 43.236 43.240 amax 44.277 44.289 44.259 emean 0.167 0.129 0.167 emin 0.154 0.071 0.152 emax 0.180 0.179 0.181 imean 2.323 2.134 2.685 imin 1.178 0.433 1.811 imax 3.390 3.390 3.618 excite_mean 0.172 0.135 0.174 fracstop 1.000 1.000 1.000 cjmean 3.062 3.075 3.062 libcent 0 182.1 -180.0 180.2 libamp 0 136.0 -180.0 125.4 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 154.3 180.0 186.9 kozaiamp 179.9 179.9 180.0