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: 15GC55
# Created Sun Dec 22 02:10:19 2024
# Orbit generated from Bernstein formalism
# Fitting 34 observations of 35
# Arc: 2.02y
# First observation: 2015/02/17
# Last observation: 2017/02/24
Preliminary a, adot, b, bdot, g, gdot:
-0.000126 0.025480 0.000001 0.000892 0.024895 0.000000
# Chi-squared of fit: 8.58 DOF: 62 RMS: 0.09
# Min/Max residuals: -0.18 0.24
# Exact a, adot, b, bdot, g, gdot:
1.590533E-05 2.540773E-02 9.910045E-07 8.925940E-04 2.496071E-02 1.597781E-03
# Covariance matrix:
1.7600E-13 2.3171E-15 -8.0087E-16 4.3037E-15 1.4697E-13 3.0715E-12
2.3171E-15 3.0213E-13 -1.8395E-15 1.0469E-14 2.0181E-13 7.5107E-12
-8.0087E-16 -1.8395E-15 9.6144E-14 -8.4075E-14 -2.0223E-15 -8.4224E-14
4.3037E-15 1.0469E-14 -8.4075E-14 1.3314E-13 1.1196E-14 4.8459E-13
1.4697E-13 2.0181E-13 -2.0223E-15 1.1196E-14 2.9466E-13 8.0125E-12
3.0715E-12 7.5107E-12 -8.4224E-14 4.8459E-13 8.0125E-12 3.4800E-10
# lat0 lon0 xBary yBary zBary JD0
0.165863 -155.133990 0.822946 0.001716 -0.541805 2457071.002878
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 28.17955 +/- 0.347
Argument of Peri: 331.29175 +/- 0.429
Long of Asc Node: 199.05577 +/- 0.002
Inclination: 2.01893 +/- 0.001
Eccentricity: 0.08669129 +/- 0.0004
Semi-Major Axis: 43.88635182 +/- 0.0041
Time of Perihelion: 2448758.1425 +/- 102.3
Perihelion: 40.08178716 +/- 0.0197
Aphelion: 47.69091647 +/- 0.0199
Period (y) 290.7384 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.18909477 +/- 0.0008
Ecliptic Y -16.32746383 +/- 0.0004
Ecliptic Z 0.11601030 +/- 0.0000
Ecliptic XDOT 0.00100948 +/- 0.0000
Ecliptic YDOT -0.00260766 +/- 0.0000
Ecliptic ZDOT 0.00009850 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.61561649 +/- 0.0007
Geocenter to KBO 40.06295923 +/- 0.0009
# Hcoef: 8.35
The following table shows the complete astrometric record for 15GC55. 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 (15GC55) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.50210 13 32 23.449 -09 28 28.00 24.5r 15GC55 568 C~2lV9 2015 02 17.54344 13 32 23.353 -09 28 27.38 24.5r 15GC55 568 C~2lV9 2015 02 20.47426 13 32 16.756 -09 27 46.67 24.8r 15GC55 568 C~2lV9 2015 03 18.47063 13 30 51.320 -09 19 09.76 24.1r 15GC55 568 C~2lV9 2015 03 18.47537 13 30 51.302 -09 19 09.72 24.7r 15GC55 568 C~2lV9 2015 03 18.52182 13 30 51.102 -09 19 08.61 24.4r 15GC55 568 C~2lV9 2015 03 20.52388 13 30 42.890 -09 18 19.33 24.5r 15GC55 568 C~2lV9 2015 04 11.41445 13 29 04.931 -09 08 32.56 24.1r 15GC55 568 C~2lV9 2015 04 12.36711 13 29 00.484 -09 08 05.62 24.8r 15GC55 568 C~2lV9 2015 04 12.40803 13 29 00.303 -09 08 04.59 24.2r 15GC55 568 C~2lV9 2015 04 12.45503 13 29 00.071 -09 08 03.19 24.2r 15GC55 568 C~2lV9 2015 04 14.46499 13 28 50.674 -09 07 07.21 23.8r 15GC55 568 C~2lV9 2015 04 18.42564 13 28 32.137 -09 05 16.25 24.1r 15GC55 568 C~2lV9 2015 04 18.47335 13 28 31.909 -09 05 15.05 24.0r 15GC55 568 C~2lV9 2015 05 25.37637 13 25 58.370 -08 49 54.69 24.7r 15GC55 568 C~2lV9 2015 05 25.43418 13 25 58.176 -08 49 53.20 24.6r 15GC55 568 C~2lV9 2015 06 21.32593 13 24 55.119 -08 43 32.41 24.7r 15GC55 568 C~2lV9 2015 06 22.28249 13 24 53.941 -08 43 25.11 24.5r 15GC55 568 C~2lV9 2015 07 15.26670 13 24 49.841 -08 42 54.97 24.4r 15GC55 568 C~2lV9 2015 07 19.26636 13 24 53.950 -08 43 18.38 24.9r 15GC55 568 C~2lV9 2016 02 04.60217 13 38 17.014 -09 59 23.87 24.9w 15GC55 568 C~2lV9 2016 02 10.62117 13 38 10.355 -09 58 40.49 24.6w 15GC55 568 C~2lV9 2016 02 11.58524 13 38 08.972 -09 58 31.75 24.7w 15GC55 568 C~2lV9 2016 03 12.48427 13 36 49.008 -09 50 28.18 24.6w 15GC55 568 C~2lV9 2016 04 03.46148 13 35 16.608 -09 41 20.24 24.5w 15GC55 568 C~2lV9 2016 04 09.44264 13 34 48.974 -09 38 36.89 24.4w 15GC55 568 C~2lV9 2016 05 02.32341 13 33 03.314 -09 28 12.63 24.5w 15GC55 568 C~2lVA 2016 05 06.33319 13 32 45.773 -09 26 29.13 24.6w 15GC55 568 C~2lVA 2016 05 28.31243 13 31 22.368 -09 18 15.99 24.5w 15GC55 568 C~2lVA 2016 05 29.31935 13 31 19.197 -09 17 57.12 24.5w 15GC55 568 C~2lVA 2016 06 04.38178 13 31 01.558 -09 16 12.42 24.7w 15GC55 568 C~2lVA 2016 06 27.30147 13 30 20.562 -09 12 08.18 24.7w 15GC55 568 C~2lVA 2016 06 27.30677 13 30 20.544 -09 12 08.34 24.4w 15GC55 568 C~2lVA 2016 07 07.30364 13 30 16.689 -09 11 44.00 24.7w 15GC55 568 C~2lVA 2017 02 24.65166 13 43 16.427 -10 24 15.50 15GC55 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 0.04 0.00 -0.09
2 0.0001 -1.55 -0.05 0.06 -0.04
3 0.0081 -107.28 0.01 2.23 0.01
4 0.0793 -1473.14 0.08 19.87 0.07
5 0.0793 -1473.40 0.13 19.81 0.01
6 0.0795 -1476.56 0.03 19.76 -0.05
7 0.0849 -1607.73 -0.02 20.99 -0.06
8 0.1449 -3172.48 -0.05 33.63 -0.14
9 0.1475 -3243.65 -0.14 34.44 0.14
10 0.1476 -3246.52 0.09 34.41 0.11
11 0.1477 -3250.23 -0.05 34.44 0.15
12 0.1532 -3400.28 0.18 35.25 -0.08
13 0.1641 -3696.48 -0.11 37.29 -0.05
14 0.1642 -3700.07 -0.08 37.16 -0.18
15 0.2652 -6155.55 -0.00 52.51 -0.07
16 0.2654 -6158.77 -0.10 52.83 0.24
17 0.3390 -7169.16 0.06 60.34 -0.05
18 0.3416 -7188.11 0.05 60.65 -0.00
19 0.4046 -7255.82 ( 0.49) 66.11 ( 0.11)
20 0.4155 -7190.48 -0.02 66.95 0.06
21 0.9640 5545.44 -0.03 173.49 0.02
22 0.9805 5437.96 0.05 178.33 0.03
23 0.9831 5415.73 -0.09 179.08 -0.00
24 1.0650 4138.55 -0.11 201.56 -0.07
25 1.1251 2666.48 0.06 215.64 -0.03
26 1.1415 2226.37 -0.03 219.00 -0.00
27 1.2042 543.35 0.17 229.99 0.11
28 1.2151 263.94 0.02 231.45 0.01
29 1.2753 -1065.28 0.03 238.44 -0.08
30 1.2781 -1115.87 -0.02 238.79 0.01
31 1.2947 -1397.21 -0.15 240.45 0.20
32 1.3574 -2051.50 0.11 244.88 0.07
33 1.3574 -2051.69 -0.01 244.63 -0.17
34 1.3848 -2113.73 -0.05 246.31 -0.07
35 2.0209 10213.29 0.02 373.73 -0.04
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.
15GC55 quality flag:3 Type: 7:4EEE 7:4EEE 7:4EEE axisobj 43.455 43.469 43.440 ecceobj 0.078 0.079 0.077 incobj 2.028 2.028 2.027 qmin 39.415 39.409 39.398 qmax 48.320 48.316 48.336 amean 43.727 43.726 43.727 amin 43.349 43.341 43.353 amax 44.122 44.132 44.133 emean 0.082 0.084 0.083 emin 0.068 0.071 0.069 emax 0.096 0.096 0.096 imean 3.153 3.174 3.127 imin 2.328 2.363 2.280 imax 4.134 3.951 4.189 excite_mean 0.099 0.101 0.100 fracstop 1.000 1.000 1.000 cjmean 3.086 3.086 3.086 libcent 0 186.1 180.0 181.9 libamp 0 99.2 130.2 98.6 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 192.7 148.3 178.5 kozaiamp 180.0 180.0 180.0