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: 15VU170
# Created Mon Apr 28 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting 29 observations of 29
# Arc: 2.02y
# First observation: 2015/09/12
# Last observation: 2017/09/20
Preliminary a, adot, b, bdot, g, gdot:
-0.000074 0.022611 0.000001 0.000726 0.023548 0.000000
# Chi-squared of fit: 8.67 DOF: 52 RMS: 0.10
# Min/Max residuals: -0.28 0.24
# Exact a, adot, b, bdot, g, gdot:
1.496728E-05 2.247857E-02 5.480298E-07 7.232810E-04 2.352597E-02 -2.394344E-04
# Covariance matrix:
2.4663E-13 -5.4702E-14 -7.9804E-16 3.2978E-15 1.6673E-13 2.6053E-12
-5.4702E-14 3.1865E-13 -2.1282E-15 9.2817E-15 1.6369E-13 7.3313E-12
-7.9804E-16 -2.1282E-15 1.3068E-13 -1.0740E-13 -2.1710E-15 -8.9393E-14
3.2978E-15 9.2817E-15 -1.0740E-13 1.4329E-13 9.2535E-15 3.8911E-13
1.6673E-13 1.6369E-13 -2.1710E-15 9.2535E-15 2.9075E-13 7.3096E-12
2.6053E-12 7.3313E-12 -8.9393E-14 3.8911E-13 7.3096E-12 3.0735E-10
# lat0 lon0 xBary yBary zBary JD0
0.058248 51.932655 0.897166 0.000615 -0.463801 2457277.993429
# Heliocentric elements and errors
Epoch: 2457270.5000 = 2015/09/05
Mean Anomaly: 260.46671 +/- 0.295
Argument of Peri: 105.16262 +/- 0.286
Long of Asc Node: 48.95420 +/- 0.001
Inclination: 1.84900 +/- 0.001
Eccentricity: 0.03449958 +/- 0.0008
Semi-Major Axis: 42.68440303 +/- 0.0037
Time of Perihelion: 2485432.7982 +/- 83.3
Perihelion: 41.21180885 +/- 0.0325
Aphelion: 44.15699720 +/- 0.0325
Period (y) 278.8766 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 27.19699427 +/- 0.0006
Ecliptic Y 33.27624540 +/- 0.0008
Ecliptic Z 0.04324826 +/- 0.0000
Ecliptic XDOT -0.00207858 +/- 0.0000
Ecliptic YDOT 0.00158453 +/- 0.0000
Ecliptic ZDOT 0.00008420 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.97658521 +/- 0.0007
Geocenter to KBO 42.50621442 +/- 0.0010
# Hcoef: 8.88
The following table shows the complete astrometric record for 15VU170. 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 (15VU170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 12.49264 03 17 59.868 +18 18 22.75 25.4w 15VU170 568 C~2nw7 2015 10 07.53854 03 16 49.644 +18 14 06.89 25.4w 15VU170 568 C~2nw7 2015 10 07.59790 03 16 49.428 +18 14 06.11 25.2w 15VU170 568 C~2nw7 2015 10 09.57780 03 16 41.975 +18 13 38.49 25.5w 15VU170 568 C~2nw7 2015 11 07.33264 03 14 33.599 +18 05 36.10 25.1r 15VU170 568 C~2nw7 2015 11 07.37479 03 14 33.390 +18 05 35.38 25.0r 15VU170 568 C~2nw7 2015 11 07.41697 03 14 33.175 +18 05 34.35 24.6r 15VU170 568 C~2nw7 2015 11 17.34635 03 13 44.430 +18 02 29.09 25.2w 15VU170 568 C~2nw7 2015 11 17.39294 03 13 44.194 +18 02 28.31 25.3w 15VU170 568 C~2nw7 2015 12 06.35508 03 12 14.586 +17 56 44.77 25.5w 15VU170 568 C~2nw7 2016 01 01.34294 03 10 37.828 +17 50 31.63 25.5w 15VU170 568 C~2nw7 2016 01 08.25043 03 10 20.141 +17 49 23.68 25.9w 15VU170 568 C~2nw7 2016 02 05.28189 03 09 52.679 +17 47 43.23 25.7w 15VU170 568 C~2nw7 2016 02 10.30227 03 09 55.751 +17 47 57.11 25.0w 15VU170 568 C~2nw7 2016 09 07.57363 03 23 18.327 +18 40 48.55 25.6w 15VU170 568 C~2nw7 2016 09 29.48481 03 22 28.740 +18 37 57.31 25.2w 15VU170 568 C~2nw7 2016 10 05.48792 03 22 08.627 +18 36 45.84 25.8w 15VU170 568 C~2nw7 2016 10 07.49247 03 22 01.386 +18 36 19.66 25.1w 15VU170 568 C~2nw7 2016 10 07.58817 03 22 00.989 +18 36 18.69 25.6w 15VU170 568 C~2nw7 2016 10 09.49252 03 21 53.871 +18 35 53.13 25.8w 15VU170 568 C~2nw7 2016 10 09.56525 03 21 53.595 +18 35 52.24 25.5w 15VU170 568 C~2nw7 2016 11 04.40663 03 19 59.312 +18 28 57.15 25.1w 15VU170 568 C~2nw7 2016 12 24.30698 03 16 12.798 +18 14 54.26 25.2w 15VU170 568 C~2nw7 2016 12 24.32550 03 16 12.721 +18 14 53.97 25.3w 15VU170 568 C~2nw7 2017 01 02.40920 03 15 43.999 +18 13 06.22 26.2w 15VU170 568 C~2nw7 2017 01 02.42780 03 15 43.950 +18 13 06.11 25.2w 15VU170 568 C~2nw7 2017 01 27.27995 03 15 01.122 +18 10 27.18 25.5w 15VU170 568 C~2nw7 2017 09 15.56413 03 28 19.302 +19 01 39.97 25.7w 15VU170 568 C~2nw7 2017 09 20.61305 03 28 08.583 +19 01 04.59 25.6w 15VU170 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 0.03 0.00 -0.01
2 0.0686 -1032.40 -0.15 12.06 0.00
3 0.0687 -1035.57 -0.02 12.10 0.01
4 0.0742 -1145.29 -0.03 13.04 0.01
5 0.1529 -3037.69 0.12 25.83 -0.05
6 0.1530 -3040.76 0.14 25.92 0.00
7 0.1531 -3043.99 -0.01 25.73 -0.22
8 0.1803 -3763.56 -0.05 30.11 0.01
9 0.1804 -3767.01 -0.08 30.24 0.11
10 0.2323 -5091.34 -0.01 37.64 0.06
11 0.3035 -6523.13 -0.12 46.70 -0.03
12 0.3224 -6784.93 0.02 48.97 -0.00
13 0.3991 -7190.16 0.17 57.57 0.00
14 0.4129 -7144.11 -0.02 59.14 0.11
15 0.9886 4724.40 -0.06 147.10 0.01
16 1.0486 3998.95 -0.03 158.82 0.09
17 1.0650 3704.16 0.05 161.88 0.04
18 1.0705 3597.92 0.24 162.58 -0.28
19 1.0708 3592.21 -0.18 163.07 0.13
20 1.0760 3487.81 0.03 163.95 0.08
21 1.0762 3483.79 0.16 164.08 0.15
22 1.1469 1806.10 -0.09 176.13 0.01
23 1.2835 -1526.91 0.10 194.43 -0.16
24 1.2836 -1528.04 -0.06 194.43 -0.16
25 1.3085 -1951.21 -0.08 197.23 -0.01
26 1.3085 -1951.91 0.01 197.30 0.06
27 1.3766 -2582.61 -0.03 203.70 0.02
28 2.0098 9178.87 -0.03 300.87 0.08
29 2.0236 9022.52 -0.00 303.73 -0.05
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.
15VU170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.076 43.085 43.067 ecceobj 0.029 0.029 0.029 incobj 1.842 1.842 1.842 qmin 40.072 40.077 40.093 qmax 45.608 45.673 45.655 amean 42.768 42.777 42.759 amin 42.433 42.444 42.429 amax 43.100 43.120 43.102 emean 0.037 0.037 0.037 emin 0.017 0.017 0.016 emax 0.059 0.060 0.059 imean 1.329 1.325 1.335 imin 0.052 0.028 0.084 imax 2.006 2.005 2.009 excite_mean 0.045 0.046 0.045 fracstop 1.000 1.000 1.000 cjmean 3.084 3.085 3.084 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 172.2 171.7 172.6 kozaiamp 180.0 180.0 180.0