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: 15VH171 # Created Mon Apr 28 01:10:43 2025 # Orbit generated from Bernstein formalism # Fitting 28 observations of 28 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000150 0.024982 -0.000003 0.001023 0.024475 0.000000 # Chi-squared of fit: 3.55 DOF: 50 RMS: 0.06 # Min/Max residuals: -0.19 0.13 # Exact a, adot, b, bdot, g, gdot: 1.624488E-05 2.476836E-02 7.083949E-07 1.011449E-03 2.442747E-02 -9.473930E-04 # Covariance matrix: 2.9017E-13 2.9702E-14 -5.4467E-16 6.0526E-15 2.1957E-13 3.2037E-12 2.9702E-14 3.4300E-13 -4.0070E-15 2.0031E-14 2.3451E-13 1.0450E-11 -5.4467E-16 -4.0070E-15 1.1112E-13 -8.5023E-14 -2.9762E-15 -2.1532E-13 6.0526E-15 2.0031E-14 -8.5023E-14 1.2238E-13 1.7619E-14 1.0166E-12 2.1957E-13 2.3451E-13 -2.9762E-15 1.7619E-14 3.2868E-13 9.2299E-12 3.2037E-12 1.0450E-11 -2.1532E-13 1.0166E-12 9.2299E-12 5.2953E-10 # lat0 lon0 xBary yBary zBary JD0 -0.818356 51.950682 0.933334 -0.005403 -0.388689 2457273.133899 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 324.81988 +/- 0.332 Argument of Peri: 23.28581 +/- 0.434 Long of Asc Node: 69.87131 +/- 0.006 Inclination: 2.46176 +/- 0.001 Eccentricity: 0.10016400 +/- 0.0007 Semi-Major Axis: 44.83564817 +/- 0.0062 Time of Perihelion: 2467986.3929 +/- 101.0 Perihelion: 40.34473027 +/- 0.0298 Aphelion: 49.32656607 +/- 0.0301 Period (y) 300.2226 +/- 0.06 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.19931168 +/- 0.0006 Ecliptic Y 31.96485325 +/- 0.0007 Ecliptic Z -0.58465468 +/- 0.0000 Ecliptic XDOT -0.00225240 +/- 0.0000 Ecliptic YDOT 0.00162224 +/- 0.0000 Ecliptic ZDOT 0.00011492 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 41.33397630 +/- 0.0007 Geocenter to KBO 40.93752191 +/- 0.0010 # Hcoef: 7.66
The following table shows the complete astrometric record for 15VH171. 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 (15VH171) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.63311 03 19 01.224 +17 27 50.26 24.2w 15VH171 568 C~2nw9 2015 09 12.49674 03 18 53.585 +17 27 18.44 24.2w 15VH171 568 C~2nw9 2015 10 09.58362 03 17 34.748 +17 22 07.49 24.3w 15VH171 568 C~2nw9 2015 11 07.33788 03 15 23.455 +17 13 44.64 23.5r 15VH171 568 C~2nw9 2015 11 07.38006 03 15 23.243 +17 13 43.86 23.8r 15VH171 568 C~2nw9 2015 11 07.42224 03 15 23.021 +17 13 43.04 23.8r 15VH171 568 C~2nw9 2015 11 10.50536 03 15 07.539 +17 12 44.41 23.7w 15VH171 568 C~2nw9 2015 11 17.35218 03 14 33.034 +17 10 34.05 24.2w 15VH171 568 C~2nw9 2015 11 17.39878 03 14 32.793 +17 10 33.19 23.9w 15VH171 568 C~2nw9 2015 12 06.36096 03 13 00.833 +17 04 49.76 24.0w 15VH171 568 C~2nw9 2015 12 06.49848 03 13 00.186 +17 04 47.51 24.0w 15VH171 568 C~2nw9 2016 01 01.34872 03 11 21.629 +16 58 52.85 24.2w 15VH171 568 C~2nw9 2016 01 07.41130 03 11 05.519 +16 57 58.45 24.0w 15VH171 568 C~2nw9 2016 01 07.42868 03 11 05.495 +16 57 58.46 24.2w 15VH171 568 C~2nw9 2016 01 08.25624 03 11 03.550 +16 57 52.22 24.1w 15VH171 568 C~2nw9 2016 02 05.28768 03 10 36.047 +16 56 52.10 24.0w 15VH171 568 C~2nw9 2016 02 10.30807 03 10 39.395 +16 57 14.64 24.2w 15VH171 568 C~2nw9 2016 09 07.62568 03 24 42.309 +17 52 42.55 15VH171 568 C~2nw9 2016 11 02.52573 03 21 29.596 +17 40 39.83 24.1w 15VH171 568 C~2nw9 2016 11 04.40084 03 21 20.315 +17 40 05.69 23.9w 15VH171 568 C~2nw9 2016 12 24.31334 03 17 27.463 +17 26 08.04 15VH171 568 C~2nw9 2016 12 25.28177 03 17 24.026 +17 25 56.16 24.0w 15VH171 568 C~2nw9 2016 12 28.42845 03 17 13.300 +17 25 19.36 24.0w 15VH171 568 C~2nw9 2017 01 02.41556 03 16 57.872 +17 24 27.51 24.0w 15VH171 568 C~2nw9 2017 01 26.32908 03 16 14.609 +17 22 19.70 23.9w 15VH171 568 C~2nw9 2017 01 26.34230 03 16 14.606 +17 22 19.61 24.1w 15VH171 568 C~2nw9 2017 12 13.39064 03 23 57.950 +17 54 03.47 23.9w 15VH171 568 C~2nw9 2017 12 13.42791 03 23 57.781 +17 54 02.87 24.0w 15VH171 568 C~2nw9
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 -0.01
2 0.0133 -113.81 -0.01 -2.65 -0.02
3 0.0875 -1284.22 -0.08 -11.95 0.03
4 0.1662 -3230.85 0.10 -8.21 0.03
5 0.1663 -3233.99 0.13 -8.17 0.03
6 0.1664 -3237.27 0.03 -8.13 0.04
7 0.1749 -3466.77 0.07 -6.66 0.04
8 0.1936 -3978.26 -0.01 -2.78 0.00
9 0.1937 -3981.82 -0.03 -2.70 0.03
10 0.2457 -5344.65 0.02 13.47 -0.07
11 0.2460 -5354.20 -0.09 13.75 0.05
12 0.3168 -6812.43 -0.01 47.21 -0.00
13 0.3334 -7049.95 -0.19 56.43 -0.15
14 0.3335 -7050.28 0.11 56.54 -0.07
15 0.3357 -7078.88 0.03 57.97 0.08
16 0.4125 -7475.70 0.07 105.52 -0.03
17 0.4262 -7423.31 -0.09 114.39 0.02
18 1.0020 5094.91 -0.04 208.41 -0.03
19 1.1551 2248.02 0.02 202.07 0.01
20 1.1602 2111.04 0.05 202.73 -0.01
21 1.2969 -1322.66 -0.05 247.40 0.08
22 1.2995 -1373.25 0.02 248.67 0.05
23 1.3081 -1531.05 0.07 252.91 -0.07
24 1.3218 -1757.77 -0.14 260.13 0.02
25 1.3873 -2389.05 0.01 297.77 0.03
26 1.3873 -2389.11 0.08 297.70 -0.07
27 2.2663 4501.76 0.02 445.24 0.02
28 2.2664 4499.28 -0.02 445.26 -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.
15VH171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 45.281 45.293 45.270 ecceobj 0.104 0.105 0.103 incobj 2.457 2.457 2.457 qmin 39.343 39.291 39.360 qmax 50.786 50.819 50.736 amean 44.910 44.917 44.895 amin 44.548 44.539 44.536 amax 45.309 45.320 45.306 emean 0.105 0.106 0.105 emin 0.091 0.092 0.089 emax 0.121 0.122 0.120 imean 1.196 1.207 1.201 imin 0.414 0.415 0.415 imax 1.775 1.803 1.788 excite_mean 0.108 0.109 0.107 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 159.7 158.8 159.0 kozaiamp 180.0 180.0 180.0