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: 15GD55
# Created Sun Nov 24 02:10:16 2024
# Orbit generated from Bernstein formalism
# Fitting 25 observations of 25
# Arc: 2.35y
# First observation: 2015/02/17
# Last observation: 2017/06/25
Preliminary a, adot, b, bdot, g, gdot:
-0.000135 0.027840 0.000004 0.002709 0.026140 0.000000
# Chi-squared of fit: 10.07 DOF: 44 RMS: 0.11
# Min/Max residuals: -0.22 0.24
# Exact a, adot, b, bdot, g, gdot:
1.708094E-05 2.771625E-02 1.646007E-06 2.703382E-03 2.617703E-02 1.049401E-03
# Covariance matrix:
3.0010E-13 2.6172E-14 -4.7755E-15 1.6841E-14 2.4161E-13 3.0122E-12
2.6172E-14 4.3523E-13 -1.3351E-14 5.2303E-14 2.9058E-13 9.3939E-12
-4.7755E-15 -1.3351E-14 1.3216E-13 -9.5578E-14 -1.1970E-14 -3.9733E-13
1.6841E-14 5.2303E-14 -9.5578E-14 1.2737E-13 4.4899E-14 1.5646E-12
2.4161E-13 2.9058E-13 -1.1970E-14 4.4899E-14 4.0771E-13 8.0507E-12
3.0122E-12 9.3939E-12 -3.9733E-13 1.5646E-12 8.0507E-12 2.8107E-10
# lat0 lon0 xBary yBary zBary JD0
0.657716 -154.234205 0.830848 0.006222 -0.529580 2457071.056568
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 7.88837 +/- 0.253
Argument of Peri: 356.61882 +/- 0.323
Long of Asc Node: 197.92062 +/- 0.001
Inclination: 5.61319 +/- 0.001
Eccentricity: 0.11642824 +/- 0.0001
Semi-Major Axis: 43.77765129 +/- 0.0036
Time of Perihelion: 2454752.2404 +/- 74.3
Perihelion: 38.68069651 +/- 0.0069
Aphelion: 48.87460606 +/- 0.0073
Period (y) 289.6589 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -35.24198343 +/- 0.0008
Ecliptic Y -16.08678792 +/- 0.0004
Ecliptic Z 0.43857882 +/- 0.0000
Ecliptic XDOT 0.00116054 +/- 0.0000
Ecliptic YDOT -0.00266250 +/- 0.0000
Ecliptic ZDOT 0.00028408 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 38.74241207 +/- 0.0008
Geocenter to KBO 38.20143305 +/- 0.0009
# Hcoef: 8.91
The following table shows the complete astrometric record for 15GD55. 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 (15GD55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.55579 13 36 30.891 -09 20 39.72 24.7r 15GD55 568 C~2lVA 2015 03 18.49249 13 34 58.208 -09 10 33.58 24.6r 15GD55 568 C~2lVA 2015 03 18.53407 13 34 58.047 -09 10 32.44 24.7r 15GD55 568 C~2lVA 2015 04 11.47256 13 33 08.563 -08 59 09.12 24.5r 15GD55 568 C~2lVA 2015 04 12.37938 13 33 04.170 -08 58 41.98 24.2r 15GD55 568 C~2lVA 2015 04 12.42509 13 33 03.942 -08 58 40.63 24.1r 15GD55 568 C~2lVA 2015 04 12.46730 13 33 03.758 -08 58 39.45 24.4r 15GD55 568 C~2lVA 2015 04 18.43790 13 32 34.799 -08 55 41.09 24.7r 15GD55 568 C~2lVA 2015 04 18.48560 13 32 34.545 -08 55 39.53 24.6r 15GD55 568 C~2lVA 2015 05 25.38864 13 29 54.195 -08 39 17.00 24.7r 15GD55 568 C~2lVA 2015 06 21.33827 13 28 47.252 -08 32 25.06 24.7r 15GD55 568 C~2lVA 2015 06 22.29486 13 28 45.979 -08 32 17.15 25.2r 15GD55 568 C~2lVA 2015 07 15.27909 13 28 40.832 -08 31 36.22 24.9r 15GD55 568 C~2lVA 2016 02 04.61431 13 43 02.653 -09 48 42.89 25.3w 15GD55 568 C~2lVA 2016 04 03.47768 13 40 01.754 -09 29 00.85 24.5w 15GD55 568 C~2lVA 2016 04 09.45884 13 39 33.220 -09 26 06.10 24.8w 15GD55 568 C~2lVA 2016 05 02.33963 13 37 43.368 -09 15 00.33 25.7w 15GD55 568 C~2lVA 2016 05 07.34298 13 37 20.583 -09 12 43.09 25.1w 15GD55 568 C~2lVA 2016 05 07.36327 13 37 20.489 -09 12 42.28 24.9w 15GD55 568 C~2lVA 2016 05 29.32744 13 35 54.074 -09 04 04.65 25.4w 15GD55 568 C~2lVA 2016 06 04.38987 13 35 35.369 -09 02 13.03 25.1w 15GD55 568 C~2lVA 2016 07 07.31590 13 34 46.784 -08 57 20.90 25.1w 15GD55 568 C~2lVA 2017 02 27.64150 13 48 36.149 -10 08 59.26 15GD55 568 C~2lVA 2017 03 29.48748 13 46 44.970 -09 57 18.12 15GD55 568 C~2lVA 2017 06 25.27303 13 41 06.279 -09 23 51.78 25.5w 15GD55 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 -0.07 0.00 -0.00
2 0.0792 -1498.63 -0.08 65.82 -0.13
3 0.0793 -1501.26 0.10 66.02 -0.00
4 0.1449 -3260.70 0.03 110.96 0.09
5 0.1474 -3331.22 -0.16 112.45 0.04
6 0.1475 -3334.86 -0.19 112.47 0.01
7 0.1476 -3337.83 0.17 112.57 0.07
8 0.1639 -3802.56 0.16 121.80 -0.12
9 0.1641 -3806.63 -0.15 121.87 -0.09
10 0.2651 -6379.92 0.08 165.12 -0.08
11 0.3389 -7455.91 -0.05 183.28 0.14
12 0.3415 -7476.41 -0.10 183.69 0.04
13 0.4044 -7562.58 0.24 193.66 0.05
14 0.9639 6013.16 0.02 521.36 -0.03
15 1.1250 3090.45 0.19 662.08 0.09
16 1.1414 2633.56 0.05 672.69 0.10
17 1.2041 876.77 0.06 705.37 -0.13
18 1.2178 512.61 -0.03 711.03 -0.00
19 1.2178 511.02 -0.14 711.28 0.24
20 1.2780 -869.37 0.14 729.09 -0.05
21 1.2945 -1168.08 -0.22 732.34 -0.13
22 1.3847 -1944.89 -0.00 742.50 -0.07
23 2.0290 11058.66 0.14 1143.26 -0.04
24 2.1107 9270.24 -0.20 1214.89 0.01
25 2.3510 3869.95 0.02 1294.58 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.
15GD55 quality flag:2 Type: SCATNEAR 7:4EEE SCATNEAR axisobj 43.337 43.350 43.324 ecceobj 0.107 0.108 0.107 incobj 5.637 5.637 5.637 qmin 38.033 37.984 37.503 qmax 49.885 49.837 50.438 amean 43.702 43.726 43.724 amin 43.292 43.303 43.280 amax 44.184 44.178 44.204 emean 0.098 0.115 0.118 emin 0.068 0.102 0.093 emax 0.129 0.129 0.142 imean 6.817 6.680 6.783 imin 5.831 5.818 5.438 imax 7.769 7.535 7.763 excite_mean 0.154 0.164 0.167 fracstop 1.000 1.000 1.000 cjmean 3.069 3.066 3.064 libcent 0 -180.0 183.3 -180.0 libamp 0 -180.0 154.3 -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 172.4 171.3 176.4 kozaiamp 180.0 180.0 180.0