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: 15FW392
# Created Wed Dec 25 02:10:14 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 18 observations of 18
# Arc: 6.94y
# First observation: 2015/03/23
# Last observation: 2022/03/02
# Chi-squared of fit: 11.67 DOF: 30 RMS: 0.14
# Min/Max residuals: -0.42 0.19
# Exact a, adot, b, bdot, g, gdot:
1.588026E-05 2.541640E-02 -1.350951E-06 -7.081656E-04 2.492051E-02 4.007828E-04
# Covariance matrix:
1.6498E-13 -5.2585E-14 1.4363E-15 4.5914E-17 2.9790E-13 -8.0956E-14
-5.2585E-14 2.2175E-13 2.0141E-15 -5.9159E-15 1.4400E-13 1.2389E-12
1.4363E-15 2.0141E-15 1.1758E-13 -2.0487E-14 1.4496E-14 1.6331E-14
4.5914E-17 -5.9159E-15 -2.0487E-14 1.1744E-14 -1.0519E-14 -3.7069E-14
2.9790E-13 1.4400E-13 1.4496E-14 -1.0519E-14 2.5040E-12 1.6666E-12
-8.0956E-14 1.2389E-12 1.6331E-14 -3.7069E-14 1.6666E-12 7.5807E-12
# lat0 lon0 xBary yBary zBary JD0
2.692500 157.244507 -0.416130 0.042507 -0.901099 2457104.651598
# Heliocentric elements and errors
Epoch: 2457104.5000 = 2015/03/23
Mean Anomaly: 15.13210 +/- 0.071
Argument of Peri: 103.34234 +/- 0.086
Long of Asc Node: 36.24955 +/- 0.004
Inclination: 3.08976 +/- 0.000
Eccentricity: 0.09131732 +/- 0.0002
Semi-Major Axis: 44.96853665 +/- 0.0126
Time of Perihelion: 2452474.7428 +/- 21.7
Perihelion: 40.86213032 +/- 0.0143
Aphelion: 49.07494298 +/- 0.0162
Period (y) 301.5583 +/- 0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -37.95959244 +/- 0.0023
Ecliptic Y 15.46920236 +/- 0.0010
Ecliptic Z 1.88498144 +/- 0.0001
Ecliptic XDOT -0.00112738 +/- 0.0000
Ecliptic YDOT -0.00256236 +/- 0.0000
Ecliptic ZDOT -0.00007556 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 41.03387189 +/- 0.0022
Geocenter to KBO 40.12761320 +/- 0.0025
# Hcoef: 7.34
The following table shows the complete astrometric record for 15FW392. 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 (15FW392) followed by the observatory code and reference code for the source of the astrometry.
2015 03 23.15082 10 39 52.96 +11 20 57.4 23.0R 15FW392 695 C~1zQ0 2015 03 23.15697 10 39 52.92 +11 20 57.4 22.9R 15FW392 695 C~1zQ0 2015 03 23.21731 10 39 52.66 +11 20 58.7 15FW392 695 C~1zQ0 2015 03 23.22247 10 39 52.62 +11 20 59.0 15FW392 695 C~1zQ0 2015 03 23.27719 10 39 52.41 +11 21 00.2 15FW392 695 C~1zQ0 2015 03 23.28187 10 39 52.39 +11 21 00.3 15FW392 695 C~1zQ0 2015 04 15.19942 10 38 28.27 +11 28 09.9 23.0R 15FW392 695 C~1zQ0 2015 04 15.27604 10 38 28.04 +11 28 11.0 15FW392 695 C~1zQ0 2015 04 15.34908 10 38 27.82 +11 28 12.0 15FW392 695 C~1zQ0 2015 04 24.16408 10 38 04.68 +11 29 55.0 23.0R 15FW392 G37 C~1zQ0 2015 04 24.26513 10 38 04.43 +11 29 55.8 15FW392 G37 C~1zQ0 2016 03 13.17699 10 46 00.88 +10 41 55.8 23.3R 15FW392 G37 C~1zQ0 2016 03 13.21732 10 46 00.69 +10 41 56.9 15FW392 G37 C~1zQ0 2019 04 05.176000 11 00 35.335 +09 03 37.86 23.4G 15FW392 G37 C~34c8 2019 04 05.249470 11 00 35.073 +09 03 40.04 15FW392 G37 C~34c8 2022 03 02.261810 11 18 57.092 +06 59 47.71 23.7G 15FW392 G37 C~5S5Z 2022 03 02.318470 11 18 56.845 +06 59 49.55 15FW392 G37 C~5S5Z 2022 03 02.370940 11 18 56.597 +06 59 50.87 15FW392 G37 C~5S5Z
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 0.12 0.00 0.15
2 0.0000 0.00 -0.08 0.00 0.01
3 0.0002 0.00 -0.06 0.00 -0.09
4 0.0002 0.00 -0.32 0.00 0.10
5 0.0003 0.00 0.09 0.00 0.03
6 0.0004 0.00 0.10 0.00 0.03
7 0.0631 0.00 -0.12 0.00 -0.06
8 0.0633 0.00 -0.07 0.00 -0.02
9 0.0635 0.00 -0.07 0.00 -0.02
10 0.0876 0.00 0.19 0.00 -0.01
11 0.0879 0.00 0.01 0.00 -0.16
12 0.9747 0.00 0.13 0.00 0.08
13 0.9749 0.00 0.09 0.00 0.12
14 4.0357 0.00 -0.30 0.00 -0.42
15 4.0359 0.00 0.13 0.00 0.19
16 6.9435 0.00 -0.11 0.00 -0.03
17 6.9436 0.00 0.13 0.00 0.16
18 6.9438 0.00 0.08 0.00 -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.
15FW392 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.640 44.640 44.640 ecceobj 0.085 0.085 0.085 incobj 3.093 3.093 3.093 qmin 39.907 39.908 39.907 qmax 49.769 49.766 49.767 amean 44.702 44.702 44.702 amin 44.349 44.348 44.348 amax 45.091 45.090 45.090 emean 0.089 0.089 0.089 emin 0.074 0.074 0.074 emax 0.104 0.104 0.104 imean 2.631 2.631 2.631 imin 1.897 1.897 1.897 imax 3.209 3.209 3.209 excite_mean 0.100 0.100 0.100 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.098 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 174.8 174.8 174.8 kozaiamp 180.0 180.0 180.0