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: 15VS170
# Created Sun Dec 22 02:10:36 2024
# Orbit generated from Bernstein formalism
# Fitting 25 observations of 25
# Arc: 2.27y
# First observation: 2015/09/07
# Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
-0.000142 0.023494 0.000002 0.007713 0.024775 0.000000
# Chi-squared of fit: 4.92 DOF: 44 RMS: 0.08
# Min/Max residuals: -0.25 0.17
# Exact a, adot, b, bdot, g, gdot:
1.513075E-05 2.333658E-02 4.882270E-06 7.666784E-03 2.476738E-02 8.825293E-04
# Covariance matrix:
2.7712E-13 4.6588E-14 -1.2493E-14 6.0388E-14 2.3519E-13 3.8595E-12
4.6588E-14 4.0670E-13 -3.1680E-14 1.5497E-13 2.6849E-13 9.8603E-12
-1.2493E-14 -3.1680E-14 1.1043E-13 -9.3763E-14 -2.8502E-14 -1.0916E-12
6.0388E-14 1.5497E-13 -9.3763E-14 2.0361E-13 1.3869E-13 5.3425E-12
2.3519E-13 2.6849E-13 -2.8502E-14 1.3869E-13 3.7379E-13 8.8417E-12
3.8595E-12 9.8603E-12 -1.0916E-12 5.3425E-12 8.8417E-12 3.3986E-10
# lat0 lon0 xBary yBary zBary JD0
0.104826 51.903275 0.933041 0.000861 -0.389433 2457273.129809
# Heliocentric elements and errors
Epoch: 2457270.5000 = 2015/09/05
Mean Anomaly: 37.35711 +/- 1.623
Argument of Peri: 321.58780 +/- 1.708
Long of Asc Node: 50.27964 +/- 0.000
Inclination: 18.19802 +/- 0.001
Eccentricity: 0.01944282 +/- 0.0005
Semi-Major Axis: 41.40697141 +/- 0.0029
Time of Perihelion: 2447171.4766 +/- 438.8
Perihelion: 40.60190308 +/- 0.0208
Aphelion: 42.21203975 +/- 0.0208
Period (y) 266.4516 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 25.88189163 +/- 0.0006
Ecliptic Y 31.50495730 +/- 0.0008
Ecliptic Z 0.07407448 +/- 0.0000
Ecliptic XDOT -0.00197277 +/- 0.0000
Ecliptic YDOT 0.00166078 +/- 0.0000
Ecliptic ZDOT 0.00084774 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 40.77303197 +/- 0.0007
Geocenter to KBO 40.37569428 +/- 0.0010
# Hcoef: 8.49
The following table shows the complete astrometric record for 15VS170. 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 (15VS170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 17 49.649 +18 20 37.40 24.9w 15VS170 568 C~2nw6 2015 09 12.49264 03 17 41.082 +18 20 27.15 25.0w 15VS170 568 C~2nw6 2015 10 07.53854 03 16 24.715 +18 17 31.83 24.6w 15VS170 568 C~2nw6 2015 10 07.59790 03 16 24.470 +18 17 31.16 24.5w 15VS170 568 C~2nw6 2015 10 09.57780 03 16 16.428 +18 17 09.55 25.0w 15VS170 568 C~2nw6 2015 11 07.33264 03 13 58.374 +18 10 28.59 24.8r 15VS170 568 C~2nw6 2015 11 07.37479 03 13 58.141 +18 10 27.87 24.6r 15VS170 568 C~2nw6 2015 11 07.41697 03 13 57.917 +18 10 27.34 24.5r 15VS170 568 C~2nw6 2015 11 10.49950 03 13 41.707 +18 09 38.16 24.6w 15VS170 568 C~2nw6 2015 11 17.34635 03 13 05.624 +18 07 48.36 24.7w 15VS170 568 C~2nw6 2015 11 17.39294 03 13 05.377 +18 07 47.58 24.8w 15VS170 568 C~2nw6 2015 12 06.35508 03 11 29.260 +18 02 54.55 24.6w 15VS170 568 C~2nw6 2016 01 01.34294 03 09 45.302 +17 57 54.11 25.0w 15VS170 568 C~2nw6 2016 01 07.40549 03 09 28.248 +17 57 11.73 24.7w 15VS170 568 C~2nw6 2016 01 08.25043 03 09 26.167 +17 57 06.79 25.1w 15VS170 568 C~2nw6 2016 02 05.28189 03 08 55.455 +17 56 58.42 24.5w 15VS170 568 C~2nw6 2016 02 10.30227 03 08 58.413 +17 57 30.27 24.6w 15VS170 568 C~2nw6 2016 11 02.53154 03 19 21.270 +18 58 27.14 15VS170 568 C~2nw7 2016 11 04.40663 03 19 11.523 +18 57 59.31 15VS170 568 C~2nw7 2016 12 24.30698 03 15 08.278 +18 46 03.69 24.8w 15VS170 568 C~2nw7 2017 01 02.40920 03 14 37.281 +18 44 37.87 24.8w 15VS170 568 C~2nw7 2017 01 26.29981 03 13 51.261 +18 43 02.65 25.5w 15VS170 568 C~2nw7 2017 09 15.60695 03 27 34.260 +19 51 46.77 24.9w 15VS170 568 C~2nw7 2017 09 22.59291 03 27 17.240 +19 51 26.62 24.8w 15VS170 568 C~2nw7 2017 12 16.36391 03 20 43.110 +19 34 13.66 24.7w 15VS170 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 -0.05 0.00 0.00
2 0.0133 -120.48 0.08 21.65 -0.12
3 0.0819 -1216.19 -0.05 134.64 -0.01
4 0.0821 -1219.73 -0.10 134.91 -0.03
5 0.0875 -1335.95 -0.05 143.88 0.01
6 0.1662 -3339.42 0.17 272.56 0.02
7 0.1663 -3342.81 0.03 272.74 -0.01
8 0.1664 -3346.03 0.07 273.07 0.12
9 0.1749 -3581.92 -0.04 286.59 -0.03
10 0.1936 -4107.16 0.01 316.70 0.02
11 0.1937 -4110.76 0.03 316.88 -0.02
12 0.2457 -5510.61 -0.04 398.80 -0.01
13 0.3168 -7021.27 0.14 506.93 -0.08
14 0.3334 -7267.34 -0.25 531.69 0.13
15 0.3357 -7297.30 0.02 534.94 0.00
16 0.4125 -7722.12 0.01 645.26 0.07
17 0.4262 -7672.81 0.04 664.53 0.03
18 1.1551 1842.80 0.11 1857.94 -0.09
19 1.1602 1702.01 -0.03 1866.52 -0.02
20 1.2969 -1818.31 -0.03 2071.23 -0.04
21 1.3218 -2265.73 -0.12 2104.02 0.08
22 1.3872 -2921.61 0.03 2184.40 -0.07
23 2.0232 9403.78 0.04 3207.91 -0.01
24 2.0423 9165.56 -0.10 3247.24 0.16
25 2.2744 3512.28 0.07 3637.67 -0.09
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.
15VS170 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 41.787 41.799 41.776 ecceobj 0.029 0.030 0.028 incobj 18.127 18.127 18.127 qmin 39.974 39.968 39.995 qmax 43.155 43.168 43.109 amean 41.491 41.502 41.481 amin 41.186 41.198 41.177 amax 41.805 41.810 41.796 emean 0.021 0.022 0.020 emin 0.010 0.011 0.009 emax 0.033 0.033 0.032 imean 16.880 16.882 16.879 imin 16.234 16.242 16.232 imax 17.462 17.460 17.457 excite_mean 0.291 0.291 0.291 fracstop 1.000 1.000 1.000 cjmean 2.971 2.971 2.971 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 177.7 178.4 177.2 kozaiamp 180.0 179.9 180.0