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: 15GB57
# Created Sun Nov 24 02:10:17 2024
# Orbit generated from Bernstein formalism
# Fitting 32 observations of 32
# Arc: 2.11y
# First observation: 2015/02/17
# Last observation: 2017/03/29
Preliminary a, adot, b, bdot, g, gdot:
-0.000115 0.020530 0.000000 0.000252 0.022217 0.000000
# Chi-squared of fit: 6.99 DOF: 58 RMS: 0.08
# Min/Max residuals: -0.26 0.27
# Exact a, adot, b, bdot, g, gdot:
1.467351E-05 2.036299E-02 5.609070E-08 2.493800E-04 2.222928E-02 -9.452090E-04
# Covariance matrix:
2.2798E-13 -2.1791E-14 -8.1285E-16 1.4134E-15 1.6245E-13 2.4675E-12
-2.1791E-14 2.6221E-13 -1.4570E-15 4.1926E-15 1.5351E-13 7.1508E-12
-8.1285E-16 -1.4570E-15 1.0540E-13 -7.9712E-14 -1.7166E-15 -6.6195E-14
1.4134E-15 4.1926E-15 -7.9712E-14 1.0609E-13 3.9734E-15 1.9215E-13
1.6245E-13 1.5351E-13 -1.7166E-15 3.9734E-15 2.6102E-13 6.8362E-12
2.4675E-12 7.1508E-12 -6.6195E-14 1.9215E-13 6.8362E-12 3.2762E-10
# lat0 lon0 xBary yBary zBary JD0
1.038319 -155.220685 0.822086 0.009989 -0.543021 2457071.006958
# Heliocentric elements and errors
Epoch: 2457070.5000 = 2015/02/17
Mean Anomaly: 249.85458 +/- 0.331
Argument of Peri: 172.18311 +/- 0.322
Long of Asc Node: 148.78017 +/- 0.035
Inclination: 1.25266 +/- 0.001
Eccentricity: 0.06780711 +/- 0.0008
Semi-Major Axis: 44.33040143 +/- 0.0054
Time of Perihelion: 2490055.3752 +/- 99.0
Perihelion: 41.32448482 +/- 0.0347
Aphelion: 47.33631803 +/- 0.0348
Period (y) 295.1622 +/- 0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.67753305 +/- 0.0009
Ecliptic Y -18.33274906 +/- 0.0004
Ecliptic Z 0.81518775 +/- 0.0000
Ecliptic XDOT 0.00115369 +/- 0.0000
Ecliptic YDOT -0.00223363 +/- 0.0000
Ecliptic ZDOT 0.00002869 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.53867566 +/- 0.0009
Geocenter to KBO 44.98571737 +/- 0.0010
# Hcoef: 7.81
The following table shows the complete astrometric record for 15GB57. 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 (15GB57) followed by the observatory code and reference code for the source of the astrometry.
2015 02 17.50618 13 33 21.355 -08 37 50.48 24.4r 15GB57 568 C~2nvU 2015 02 17.54752 13 33 21.279 -08 37 50.01 24.4r 15GB57 568 C~2nvU 2015 02 20.47836 13 33 15.212 -08 37 10.42 24.4r 15GB57 568 C~2nvU 2015 04 11.41852 13 30 20.963 -08 19 28.29 24.0r 15GB57 568 C~2nvU 2015 04 12.37119 13 30 16.925 -08 19 04.45 24.4r 15GB57 568 C~2nvU 2015 04 12.42087 13 30 16.697 -08 19 03.13 23.8r 15GB57 568 C~2nvU 2015 04 12.45912 13 30 16.522 -08 19 02.21 24.4r 15GB57 568 C~2nvU 2015 04 14.46908 13 30 07.999 -08 18 11.66 24.5r 15GB57 568 C~2nvU 2015 04 18.42971 13 29 51.199 -08 16 32.78 24.1r 15GB57 568 C~2nvU 2015 04 18.47743 13 29 50.998 -08 16 31.46 24.5r 15GB57 568 C~2nvU 2015 05 16.27640 13 28 00.785 -08 05 51.58 24.2r 15GB57 568 C~2nvU 2015 05 25.38047 13 27 30.784 -08 03 01.32 24.7r 15GB57 568 C~2nvU 2015 05 25.43825 13 27 30.605 -08 03 00.36 24.3r 15GB57 568 C~2nvU 2015 06 21.33006 13 26 31.326 -07 57 38.47 24.5r 15GB57 568 C~2nvU 2015 06 22.28659 13 26 30.164 -07 57 32.83 24.5r 15GB57 568 C~2nvU 2015 07 12.28060 13 26 22.097 -07 57 11.03 24.4r 15GB57 568 C~2nvU 2015 07 19.27044 13 26 26.837 -07 57 48.33 24.4r 15GB57 568 C~2nvU 2016 02 04.59812 13 38 05.294 -09 04 39.48 24.9w 15GB57 568 C~2nvU 2016 02 10.61712 13 37 58.813 -09 03 52.65 24.9w 15GB57 568 C~2nvU 2016 03 11.56702 13 36 46.720 -08 56 16.99 24.6w 15GB57 568 C~2nvU 2016 04 03.45744 13 35 19.506 -08 47 34.58 24.4w 15GB57 568 C~2nvU 2016 04 09.43859 13 34 54.401 -08 45 06.72 24.5w 15GB57 568 C~2nvU 2016 05 02.31935 13 33 18.328 -08 35 48.33 24.3w 15GB57 568 C~2nvU 2016 05 06.32911 13 33 02.358 -08 34 16.78 24.4w 15GB57 568 C~2nvU 2016 05 28.30028 13 31 46.068 -08 27 06.16 24.6w 15GB57 568 C~2nvU 2016 06 04.37773 13 31 26.830 -08 25 20.63 24.7w 15GB57 568 C~2nvU 2016 06 27.30147 13 30 48.041 -08 22 00.60 24.7w 15GB57 568 C~2nvU 2016 06 27.30677 13 30 48.022 -08 22 00.58 24.6w 15GB57 568 C~2nvU 2016 07 07.30364 13 30 43.602 -08 21 48.00 24.7w 15GB57 568 C~2nvU 2017 03 29.46871 13 40 10.621 -09 14 39.02 24.3w 15GB57 568 C~2nvU 2017 03 29.47811 13 40 10.570 -09 14 39.12 15GB57 568 C~2nvU 2017 03 29.49962 13 40 10.480 -09 14 38.55 24.4w 15GB57 568 C~2nvU
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 0.03
2 0.0001 -1.22 0.10 0.03 0.01
3 0.0081 -99.44 0.14 4.01 0.07
4 0.1449 -2894.22 0.09 45.58 0.10
5 0.1475 -2958.73 0.08 45.75 0.02
6 0.1476 -2962.36 -0.14 45.74 0.02
7 0.1477 -2965.12 -0.26 45.64 -0.07
8 0.1532 -3101.37 -0.17 46.21 0.09
9 0.1641 -3369.69 0.00 46.59 -0.07
10 0.1642 -3372.95 0.02 46.72 0.07
11 0.2403 -5130.71 -0.02 39.68 -0.06
12 0.2652 -5607.97 -0.02 33.73 0.03
13 0.2654 -5610.80 0.01 33.64 0.00
14 0.3390 -6548.77 -0.00 7.88 -0.00
15 0.3416 -6566.91 0.10 6.75 -0.07
16 0.3964 -6686.46 0.08 -17.27 -0.05
17 0.4155 -6607.16 0.03 -25.93 -0.03
18 0.9640 4506.02 0.07 32.35 -0.01
19 0.9805 4399.53 0.01 41.22 -0.06
20 1.0625 3238.51 -0.17 78.36 -0.12
21 1.1251 1844.23 0.00 94.99 0.05
22 1.1415 1443.75 0.06 97.15 0.01
23 1.2041 -86.41 0.08 97.31 0.01
24 1.2151 -340.35 0.03 95.98 -0.01
25 1.2753 -1551.21 -0.03 82.67 0.06
26 1.2947 -1855.49 -0.03 76.30 0.01
27 1.3574 -2464.42 0.11 51.36 0.02
28 1.3574 -2464.69 -0.09 51.28 -0.05
29 1.3848 -2530.33 -0.08 38.92 -0.11
30 2.1108 6454.54 0.06 144.66 0.27
31 2.1108 6453.87 0.00 144.29 -0.09
32 2.1109 6452.42 -0.05 144.34 -0.05
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.
15GB57 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.937 43.950 43.924 ecceobj 0.074 0.075 0.073 incobj 1.256 1.256 1.256 qmin 40.299 40.217 40.329 qmax 48.393 48.477 48.358 amean 44.225 44.238 44.212 amin 43.878 43.887 43.857 amax 44.598 44.617 44.576 emean 0.071 0.072 0.069 emin 0.055 0.056 0.053 emax 0.086 0.087 0.085 imean 1.766 1.769 1.763 imin 1.042 1.042 1.042 imax 2.411 2.417 2.407 excite_mean 0.077 0.079 0.076 fracstop 1.000 1.000 1.000 cjmean 3.097 3.097 3.097 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 175.6 175.0 175.4 kozaiamp 179.9 179.9 179.9