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: 15VN172
# Created Wed Dec 25 02:10:33 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 27 observations of 27
# Arc: 6.24y
# First observation: 2015/09/06
# Last observation: 2021/12/01
# Chi-squared of fit: 6.55 DOF: 48 RMS: 0.09
# Min/Max residuals: -0.14 0.23
# Exact a, adot, b, bdot, g, gdot:
1.423403E-05 1.908397E-02 7.679396E-07 6.740545E-04 2.131858E-02 1.056500E-03
# Covariance matrix:
3.2802E-13 -6.3920E-14 1.1603E-15 -2.2487E-15 1.9208E-13 -5.0364E-13
-6.3920E-14 1.8390E-13 -4.1588E-15 7.5093E-15 6.7645E-14 1.7373E-12
1.1603E-15 -4.1588E-15 8.3923E-14 -2.2120E-14 -1.5666E-15 -4.3046E-14
-2.2487E-15 7.5093E-15 -2.2120E-14 1.6252E-14 2.6914E-15 7.7771E-14
1.9208E-13 6.7645E-14 -1.5666E-15 2.6914E-15 2.1412E-13 6.3750E-13
-5.0364E-13 1.7373E-12 -4.3046E-14 7.7771E-14 6.3750E-13 1.7988E-11
# lat0 lon0 xBary yBary zBary JD0
0.040967 50.888314 0.932990 0.000426 -0.390133 2457272.119709
# Heliocentric elements and errors
Epoch: 2457272.5000 = 2015/09/07
Mean Anomaly: 136.94844 +/- 0.217
Argument of Peri: 220.43997 +/- 0.213
Long of Asc Node: 48.61181 +/- 0.001
Inclination: 2.02587 +/- 0.000
Eccentricity: 0.05036306 +/- 0.0001
Semi-Major Axis: 45.57570978 +/- 0.0039
Time of Perihelion: 2414520.8193 +/- 67.9
Perihelion: 43.28037760 +/- 0.0066
Aphelion: 47.87104196 +/- 0.0068
Period (y) 307.6864 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 30.55674379 +/- 0.0007
Ecliptic Y 36.11024599 +/- 0.0008
Ecliptic Z 0.03358427 +/- 0.0000
Ecliptic XDOT -0.00181799 +/- 0.0000
Ecliptic YDOT 0.00164491 +/- 0.0000
Ecliptic ZDOT 0.00008672 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 47.30394809 +/- 0.0007
Geocenter to KBO 46.90743058 +/- 0.0010
# Hcoef: 7.39
The following table shows the complete astrometric record for 15VN172. 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 (15VN172) followed by the observatory code and reference code for the source of the astrometry.
2015 09 06.61892 03 13 46.375 +18 01 01.01 24.3w 15VN172 568 C~2nwD 2015 11 07.35377 03 10 25.222 +17 48 15.71 24.0r 15VN172 568 C~2nwD 2015 11 07.39585 03 10 25.026 +17 48 14.99 24.1r 15VN172 568 C~2nwD 2015 11 07.43803 03 10 24.835 +17 48 14.27 24.1r 15VN172 568 C~2nwD 2015 11 10.52298 03 10 11.016 +17 47 20.21 15VN172 568 C~2nwD 2015 11 17.36965 03 09 40.306 +17 45 20.55 24.3w 15VN172 568 C~2nwD 2015 11 17.41626 03 09 40.093 +17 45 19.75 24.2w 15VN172 568 C~2nwD 2015 12 06.37850 03 08 18.632 +17 40 00.61 24.5w 15VN172 568 C~2nwD 2015 12 13.31287 03 07 51.736 +17 38 14.76 24.2w 15VN172 568 C~2nwD 2015 12 13.37141 03 07 51.517 +17 38 13.89 24.3w 15VN172 568 C~2nwD 2016 01 01.36607 03 06 51.328 +17 34 17.22 24.5w 15VN172 568 C~2nwD 2016 01 07.31283 03 06 37.468 +17 33 22.93 24.6w 15VN172 568 C~2nwD 2016 02 04.28927 03 06 11.210 +17 31 45.41 24.2w 15VN172 568 C~2nwD 2016 09 06.61138 03 18 08.885 +18 20 16.82 15VN172 568 C~2nwD 2016 09 26.60062 03 17 27.961 +18 17 50.66 24.0w 15VN172 568 C~2nwD 2016 10 27.50259 03 15 35.805 +18 10 54.14 24.3w 15VN172 568 C~2nwD 2016 11 02.60863 03 15 09.206 +18 09 13.95 24.3w 15VN172 568 C~2nwD 2016 11 03.52763 03 15 05.160 +18 08 58.65 24.3w 15VN172 568 C~2nwD 2016 12 29.38063 03 11 20.904 +17 54 41.06 24.4w 15VN172 568 C~2nwD 2017 01 02.38784 03 11 10.267 +17 54 00.24 24.6w 15VN172 568 C~2nwD 2017 01 26.27742 03 10 33.056 +17 51 39.22 24.3w 15VN172 568 C~2nwD 2017 01 26.29981 03 10 33.042 +17 51 39.16 24.5w 15VN172 568 C~2nwD 2017 12 13.37637 03 16 39.994 +18 17 44.09 24.2w 15VN172 568 C~2nwD 2017 12 13.41395 03 16 39.840 +18 17 43.39 24.3w 15VN172 568 C~2nwD 2021 12 01.260670 03 35 21.313 +19 34 59.12 24.2G 15VN172 G37 C~5J85 2021 12 01.310190 03 35 21.108 +19 34 58.06 15VN172 G37 C~5J85 2021 12 01.385990 03 35 20.759 +19 34 57.05 15VN172 G37 C~5J85
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 -0.00 0.00 -0.06
2 0.1690 0.00 -0.03 0.00 0.21
3 0.1691 0.00 -0.10 0.00 0.22
4 0.1693 0.00 -0.09 0.00 0.23
5 0.1777 0.00 0.01 0.00 -0.10
6 0.1964 0.00 0.04 0.00 -0.03
7 0.1966 0.00 0.03 0.00 -0.02
8 0.2485 0.00 -0.01 0.00 0.01
9 0.2675 0.00 -0.02 0.00 -0.07
10 0.2676 0.00 0.03 0.00 -0.08
11 0.3196 0.00 0.03 0.00 -0.05
12 0.3359 0.00 0.05 0.00 -0.12
13 0.4125 0.00 0.01 0.00 0.06
14 1.0020 0.00 0.06 0.00 -0.05
15 1.0568 0.00 0.05 0.00 0.01
16 1.1414 0.00 0.06 0.00 -0.02
17 1.1581 0.00 -0.12 0.00 -0.05
18 1.1606 0.00 0.11 0.00 -0.02
19 1.3135 0.00 0.02 0.00 -0.04
20 1.3245 0.00 -0.11 0.00 0.01
21 1.3899 0.00 0.10 0.00 -0.03
22 1.3900 0.00 0.10 0.00 -0.04
23 2.2690 0.00 0.03 0.00 0.09
24 2.2691 0.00 -0.09 0.00 -0.07
25 6.2358 0.00 -0.14 0.00 0.18
26 6.2360 0.00 0.13 0.00 -0.14
27 6.2362 0.00 0.00 0.00 -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.
15VN172 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.020 46.020 46.020 ecceobj 0.047 0.047 0.047 incobj 2.017 2.017 2.017 qmin 42.789 42.780 42.784 qmax 48.795 48.796 48.793 amean 45.687 45.687 45.687 amin 45.324 45.323 45.326 amax 46.061 46.062 46.059 emean 0.047 0.047 0.047 emin 0.034 0.034 0.034 emax 0.060 0.060 0.060 imean 1.480 1.480 1.480 imin 1.066 1.066 1.066 imax 1.869 1.869 1.868 excite_mean 0.054 0.054 0.054 fracstop 1.000 1.000 1.000 cjmean 3.119 3.119 3.119 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 210.7 210.7 210.7 kozaiamp 179.9 180.0 180.0