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: 15FS345
# Created Tue Apr 1 01:10:21 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 20 observations of 20
# Arc: 9.94y
# First observation: 2015/03/17
# Last observation: 2025/02/23
# Chi-squared of fit: 37.51 DOF: 34 RMS: 0.24
# Min/Max residuals: -0.72 0.61
# Exact a, adot, b, bdot, g, gdot:
1.632466E-05 2.593777E-02 1.330131E-07 7.084852E-04 2.498661E-02 -1.041629E-03
# Covariance matrix:
2.2272E-13 -6.3192E-14 2.6026E-15 -1.1125E-15 1.4420E-13 -1.3759E-13
-6.3192E-14 5.9159E-14 -1.1604E-15 1.4399E-15 -2.6117E-15 2.1550E-13
2.6026E-15 -1.1604E-15 1.5522E-13 -2.0837E-14 7.0623E-15 -3.0713E-15
-1.1125E-15 1.4399E-15 -2.0837E-14 5.2520E-15 8.4472E-18 5.7698E-15
1.4420E-13 -2.6117E-15 7.0623E-15 8.4472E-18 5.8910E-13 1.2106E-13
-1.3759E-13 2.1550E-13 -3.0713E-15 5.7698E-15 1.2106E-13 8.9026E-13
# lat0 lon0 xBary yBary zBary JD0
3.205590 161.752043 -0.246781 0.053862 -0.959099 2457098.786648
# Heliocentric elements and errors
Epoch: 2457098.5000 = 2015/03/17
Mean Anomaly: 347.18206 +/- 0.016
Argument of Peri: 80.60797 +/- 0.021
Long of Asc Node: 98.29627 +/- 0.002
Inclination: 3.48770 +/- 0.000
Eccentricity: 0.13077805 +/- 0.0001
Semi-Major Axis: 46.91898227 +/- 0.0070
Time of Perihelion: 2461278.1227 +/- 26.0
Perihelion: 40.78300949 +/- 0.0078
Aphelion: 53.05495506 +/- 0.0093
Period (y) 321.3891 +/- 0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -38.94220162 +/- 0.0012
Ecliptic Y 12.57854874 +/- 0.0004
Ecliptic Z 2.23795910 +/- 0.0001
Ecliptic XDOT -0.00078102 +/- 0.0000
Ecliptic YDOT -0.00274195 +/- 0.0000
Ecliptic ZDOT 0.00007122 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.98445096 +/- 0.0011
Geocenter to KBO 40.02149979 +/- 0.0012
# Hcoef: 7.04
The following table shows the complete astrometric record for 15FS345. 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 (15FS345) followed by the observatory code and reference code for the source of the astrometry.
2015 03 17.28587 10 57 38.027 +10 07 02.63 22.9R 15FS345 568 C~1w1E 2015 03 17.38040 10 57 37.591 +10 07 05.27 15FS345 568 C~1w1E 2015 03 17.49595 10 57 37.066 +10 07 08.23 15FS345 568 C~1w1E 2015 04 20.04979 10 55 28.351 +10 19 01.86 22.8R 15FS345 304 C~1w1E 2015 04 20.08039 10 55 28.279 +10 19 02.58 15FS345 304 C~1w1E 2015 05 21.97379 10 54 36.490 +10 22 06.21 15FS345 304 C~1w1E 2015 05 23.04214 10 54 36.230 +10 22 02.99 15FS345 304 C~1w1E 2016 03 08.18049 11 03 55.408 +09 30 52.12 15FS345 304 C~1w1E 2016 03 09.26111 11 03 50.400 +09 31 22.86 15FS345 304 C~1w1E 2018 04 10.16709 11 12 50.882 +08 39 12.19 22.3R 15FS345 G37 C~2bHP 2018 04 10.21273 11 12 50.760 +08 39 12.93 15FS345 G37 C~2bHP 2021 02 15.354790 11 33 32.193 +06 33 46.22 23.1G 15FS345 G37 C~4ZH8 2021 02 15.438680 11 33 31.847 +06 33 48.83 15FS345 G37 C~4ZH8 2021 02 15.505630 11 33 31.578 +06 33 50.62 15FS345 G37 C~4ZH8 2022 04 08.154950 11 35 18.226 +06 24 23.05 23.0G 15FS345 G37 C~5ZbD 2022 04 08.189930 11 35 18.085 +06 24 23.89 15FS345 G37 C~5ZbD 2022 04 08.224870 11 35 17.948 +06 24 24.43 15FS345 G37 C~5ZbD 2025 02 23.399100 11 55 11.534 +04 19 52.84 23.2G 15FS345 G37 C~8iaX 2025 02 23.446620 11 55 11.337 +04 19 54.35 15FS345 G37 C~8iaX 2025 02 23.498570 11 55 11.096 +04 19 56.36 15FS345 G37 C~8iaX
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 0.05
2 0.0003 0.00 0.03 0.00 0.14
3 0.0006 0.00 0.13 0.00 -0.00
4 0.0924 0.00 0.06 0.00 0.19
5 0.0925 0.00 0.35 0.00 0.48
6 0.1798 0.00 0.17 0.00 -0.25
7 0.1828 0.00 -0.31 0.00 0.08
8 0.9771 0.00 -0.20 0.00 0.28
9 0.9801 0.00 0.09 0.00 -0.11
10 3.0661 0.00 -0.72 0.00 -0.26
11 3.0662 0.00 0.06 0.00 -0.48
12 5.9194 0.00 -0.03 0.00 -0.26
13 5.9197 0.00 -0.04 0.00 -0.06
14 5.9198 0.00 0.05 0.00 -0.19
15 7.0606 0.00 -0.04 0.00 0.00
16 7.0607 0.00 0.03 0.00 -0.00
17 7.0608 0.00 0.16 0.00 -0.31
18 9.9414 0.00 0.17 0.00 -0.01
19 9.9416 0.00 0.19 0.00 0.11
20 9.9417 0.00 -0.18 0.00 0.61
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.
15FS345 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.506 46.506 46.506 ecceobj 0.122 0.122 0.122 incobj 3.487 3.487 3.487 qmin 40.130 40.092 40.140 qmax 53.482 53.460 53.519 amean 46.629 46.629 46.629 amin 46.240 46.239 46.239 amax 47.077 47.058 47.062 emean 0.123 0.123 0.123 emin 0.111 0.110 0.111 emax 0.137 0.136 0.137 imean 1.819 1.819 1.819 imin 1.399 1.399 1.398 imax 2.250 2.251 2.250 excite_mean 0.127 0.127 0.127 fracstop 1.000 1.000 1.000 cjmean 3.114 3.114 3.114 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 185.7 185.7 185.7 kozaiamp 179.9 179.9 179.9