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: 15VX170
# Created Mon Apr 28 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting 26 observations of 26
# Arc: 2.04y
# First observation: 2015/09/07
# Last observation: 2017/09/20
Preliminary a, adot, b, bdot, g, gdot:
-0.000069 0.021546 0.000001 0.000991 0.022544 0.000000
# Chi-squared of fit: 8.55 DOF: 46 RMS: 0.10
# Min/Max residuals: -0.33 0.26
# Exact a, adot, b, bdot, g, gdot:
1.510823E-05 2.134545E-02 4.328559E-07 9.842029E-04 2.241843E-02 -7.553458E-04
# Covariance matrix:
2.8927E-13 -8.0630E-14 -1.2842E-15 4.6771E-15 1.9812E-13 2.6364E-12
-8.0630E-14 3.7154E-13 -3.7998E-15 1.5669E-14 1.7066E-13 8.8479E-12
-1.2842E-15 -3.7998E-15 1.4764E-13 -1.1993E-13 -3.7445E-15 -1.6022E-13
4.6771E-15 1.5669E-14 -1.1993E-13 1.5665E-13 1.4673E-14 6.5595E-13
1.9812E-13 1.7066E-13 -3.7445E-15 1.4673E-14 3.4265E-13 8.2794E-12
2.6364E-12 8.8479E-12 -1.6022E-13 6.5595E-13 8.2794E-12 3.7036E-10
# lat0 lon0 xBary yBary zBary JD0
0.113662 52.194500 0.935008 0.000912 -0.384686 2457273.129809
# Heliocentric elements and errors
Epoch: 2457270.5000 = 2015/09/05
Mean Anomaly: 304.33919 +/- 0.289
Argument of Peri: 64.84135 +/- 0.384
Long of Asc Node: 48.57309 +/- 0.001
Inclination: 2.65120 +/- 0.001
Eccentricity: 0.06809769 +/- 0.0008
Semi-Major Axis: 46.63351964 +/- 0.0065
Time of Perihelion: 2475254.7655 +/- 93.3
Perihelion: 43.45788486 +/- 0.0385
Aphelion: 49.80915442 +/- 0.0386
Period (y) 318.4604 +/- 0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 28.31320452 +/- 0.0007
Ecliptic Y 34.97366029 +/- 0.0009
Ecliptic Z 0.08851556 +/- 0.0000
Ecliptic XDOT -0.00211819 +/- 0.0000
Ecliptic YDOT 0.00151844 +/- 0.0000
Ecliptic ZDOT 0.00012007 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.99780327 +/- 0.0008
Geocenter to KBO 44.60615788 +/- 0.0012
# Hcoef: 8.56
The following table shows the complete astrometric record for 15VX170. 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 (15VX170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 19 00.237 +18 25 38.40 25.1w 15VX170 568 C~2nw7 2015 10 07.53854 03 17 46.097 +18 21 18.03 25.4w 15VX170 568 C~2nw7 2015 10 07.59790 03 17 45.884 +18 21 17.26 25.4w 15VX170 568 C~2nw7 2015 11 07.33264 03 15 36.207 +18 13 19.89 25.0r 15VX170 568 C~2nw7 2015 11 07.37479 03 15 36.006 +18 13 19.08 25.1r 15VX170 568 C~2nw7 2015 11 07.41697 03 15 35.802 +18 13 18.26 25.4r 15VX170 568 C~2nw7 2015 11 10.49950 03 15 21.349 +18 12 24.33 25.3w 15VX170 568 C~2nw7 2015 11 17.34635 03 14 49.190 +18 10 23.77 25.3w 15VX170 568 C~2nw7 2015 11 17.39294 03 14 48.960 +18 10 22.98 25.0w 15VX170 568 C~2nw7 2016 01 01.34294 03 11 50.064 +17 59 05.88 25.4w 15VX170 568 C~2nw7 2016 01 07.40549 03 11 34.785 +17 58 08.18 25.7w 15VX170 568 C~2nw7 2016 01 08.25043 03 11 32.931 +17 58 01.10 24.9w 15VX170 568 C~2nw7 2016 09 07.57363 03 23 55.186 +18 47 28.72 15VX170 568 C~2nw7 2016 09 27.51061 03 23 13.695 +18 45 11.76 25.6w 15VX170 568 C~2nw7 2016 09 29.48481 03 23 07.944 +18 44 52.03 25.1w 15VX170 568 C~2nw7 2016 10 05.48792 03 22 48.744 +18 43 45.55 25.3w 15VX170 568 C~2nw7 2016 10 07.58817 03 22 41.450 +18 43 20.17 25.2w 15VX170 568 C~2nw7 2016 10 09.49252 03 22 34.663 +18 42 56.54 25.2w 15VX170 568 C~2nw7 2016 10 09.56525 03 22 34.372 +18 42 55.58 25.0w 15VX170 568 C~2nw7 2016 11 02.53154 03 20 53.873 +18 36 57.96 25.3w 15VX170 568 C~2nw7 2016 11 04.40663 03 20 45.213 +18 36 26.62 24.8w 15VX170 568 C~2nw7 2016 12 24.32550 03 17 08.059 +18 23 10.47 25.0w 15VX170 568 C~2nw7 2017 01 02.42780 03 16 40.347 +18 21 27.64 25.3w 15VX170 568 C~2nw7 2017 01 27.27995 03 15 58.740 +18 18 56.23 25.4w 15VX170 568 C~2nw7 2017 09 15.56413 03 28 41.072 +19 08 19.62 25.7w 15VX170 568 C~2nw7 2017 09 20.61305 03 28 30.830 +19 07 47.51 25.6w 15VX170 568 C~2nw7
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 -0.01 0.00 0.05
2 0.0819 -1086.76 -0.06 20.52 -0.00
3 0.0821 -1089.89 -0.04 20.56 -0.01
4 0.1662 -2997.59 0.15 39.98 0.11
5 0.1663 -3000.56 0.11 39.95 0.04
6 0.1664 -3003.59 0.03 39.92 -0.04
7 0.1749 -3216.50 -0.18 41.75 -0.02
8 0.1936 -3690.49 0.07 45.57 -0.05
9 0.1937 -3693.86 -0.02 45.67 0.00
10 0.3168 -6334.66 0.26 67.43 -0.04
11 0.3334 -6560.36 -0.33 69.94 -0.05
12 0.3357 -6587.78 0.03 70.17 -0.13
13 1.0019 4388.82 -0.00 203.69 -0.04
14 1.0565 3783.81 -0.16 218.92 0.06
15 1.0619 3699.76 0.14 220.36 0.04
16 1.0783 3418.98 0.09 224.66 -0.05
17 1.0841 3312.29 -0.20 226.21 -0.04
18 1.0893 3213.00 0.15 227.65 0.08
19 1.0895 3208.75 -0.14 227.76 0.12
20 1.1551 1736.33 0.11 243.62 0.07
21 1.1602 1609.30 0.08 244.65 -0.02
22 1.2969 -1580.66 0.01 269.42 0.04
23 1.3218 -1988.35 -0.06 272.61 -0.13
24 1.3899 -2599.83 -0.01 280.80 0.11
25 2.0231 8632.03 -0.01 413.78 -0.08
26 2.0369 8483.19 0.00 418.05 -0.02
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.
15VX170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 47.086 47.102 47.071 ecceobj 0.069 0.070 0.068 incobj 2.640 2.641 2.640 qmin 42.712 42.652 42.785 qmax 50.945 51.048 50.885 amean 46.712 46.727 46.697 amin 46.339 46.347 46.320 amax 47.105 47.142 47.092 emean 0.069 0.070 0.068 emin 0.057 0.058 0.056 emax 0.082 0.083 0.081 imean 2.021 2.023 2.020 imin 1.661 1.663 1.661 imax 2.368 2.370 2.364 excite_mean 0.078 0.079 0.077 fracstop 1.000 1.000 1.000 cjmean 3.128 3.128 3.128 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 167.1 167.2 166.6 kozaiamp 179.9 179.9 180.0