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: 15VW170
# Created Sun Apr 27 01:10:42 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 39 observations of 39
# Arc: 9.32y
# First observation: 2015/09/07
# Last observation: 2024/12/31
# Chi-squared of fit: 7.24 DOF: 72 RMS: 0.08
# Min/Max residuals: -0.19 0.28
# Exact a, adot, b, bdot, g, gdot:
1.496218E-05 2.081714E-02 -2.240503E-07 -3.774953E-04 2.224333E-02 1.230202E-03
# Covariance matrix:
1.6078E-13 -8.1995E-14 -1.2297E-15 1.7419E-15 6.7296E-14 -4.8106E-13
-8.1995E-14 1.0982E-13 1.6067E-15 -2.2862E-15 8.8597E-15 6.3516E-13
-1.2297E-15 1.6067E-15 5.3062E-14 -1.0323E-14 -5.1740E-18 9.9699E-15
1.7419E-15 -2.2862E-15 -1.0323E-14 6.7209E-15 -2.7318E-18 -1.4181E-14
6.7296E-14 8.8597E-15 -5.1740E-18 -2.7318E-18 9.3956E-14 4.4071E-15
-4.8106E-13 6.3516E-13 9.9699E-15 -1.4181E-14 4.4071E-15 3.9379E-12
# lat0 lon0 xBary yBary zBary JD0
0.021993 51.956457 0.933402 0.000298 -0.388568 2457273.129809
# Heliocentric elements and errors
Epoch: 2457272.5000 = 2015/09/07
Mean Anomaly: 75.66910 +/- 0.064
Argument of Peri: 98.97493 +/- 0.066
Long of Asc Node: 231.98494 +/- 0.001
Inclination: 1.03743 +/- 0.000
Eccentricity: 0.03698250 +/- 0.0001
Semi-Major Axis: 45.71163011 +/- 0.0031
Time of Perihelion: 2433544.8580 +/- 20.1
Perihelion: 44.02109991 +/- 0.0055
Aphelion: 47.40216031 +/- 0.0056
Period (y) 309.0639 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 28.67583395 +/- 0.0004
Ecliptic Y 35.13635696 +/- 0.0005
Ecliptic Z 0.01725453 +/- 0.0000
Ecliptic XDOT -0.00192647 +/- 0.0000
Ecliptic YDOT 0.00169189 +/- 0.0000
Ecliptic ZDOT -0.00004635 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 45.35267528 +/- 0.0004
Geocenter to KBO 44.95728258 +/- 0.0006
# Hcoef: 7.71
The following table shows the complete astrometric record for 15VW170. 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 (15VW170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 18 08.047 +18 16 38.79 24.4w 15VW170 568 C~2nw7 2015 09 12.49264 03 18 00.718 +18 16 09.88 24.6w 15VW170 568 C~2nw7 2015 10 07.53854 03 16 54.127 +18 11 50.63 24.5w 15VW170 568 C~2nw7 2015 10 07.59790 03 16 53.913 +18 11 49.81 24.3w 15VW170 568 C~2nw7 2015 10 09.57780 03 16 46.851 +18 11 22.40 24.4w 15VW170 568 C~2nw7 2015 11 07.33264 03 14 45.261 +18 03 27.00 23.9r 15VW170 568 C~2nw7 2015 11 07.37479 03 14 45.063 +18 03 26.29 24.1r 15VW170 568 C~2nw7 2015 11 07.41697 03 14 44.869 +18 03 25.55 24.2r 15VW170 568 C~2nw7 2015 11 10.49950 03 14 30.550 +18 02 29.22 24.4w 15VW170 568 C~2nw7 2015 11 17.34635 03 13 58.705 +18 00 23.74 24.6w 15VW170 568 C~2nw7 2015 11 17.39294 03 13 58.484 +18 00 22.96 24.5w 15VW170 568 C~2nw7 2015 12 06.35508 03 12 33.591 +17 54 46.32 24.4w 15VW170 568 C~2nw7 2016 01 01.34294 03 11 01.801 +17 48 37.94 24.5w 15VW170 568 C~2nw7 2016 01 08.25043 03 10 44.977 +17 47 29.53 24.4w 15VW170 568 C~2nw7 2016 02 05.28189 03 10 18.614 +17 45 38.00 24.7w 15VW170 568 C~2nw7 2016 02 10.30227 03 10 21.464 +17 45 48.10 24.0w 15VW170 568 C~2nw7 2016 09 07.57363 03 22 59.585 +18 33 32.14 15VW170 568 C~2nw7 2016 09 27.51061 03 22 18.199 +18 30 54.42 24.6w 15VW170 568 C~2nw7 2016 09 29.48481 03 22 12.465 +18 30 32.60 24.7w 15VW170 568 C~2nw7 2016 10 05.48792 03 21 53.408 +18 29 20.30 24.6w 15VW170 568 C~2nw7 2016 10 07.49247 03 21 46.526 +18 28 54.17 24.5w 15VW170 568 C~2nw7 2016 10 07.58817 03 21 46.169 +18 28 53.00 24.5w 15VW170 568 C~2nw7 2016 10 09.49252 03 21 39.414 +18 28 27.47 24.7w 15VW170 568 C~2nw7 2016 10 09.56525 03 21 39.146 +18 28 26.47 24.6w 15VW170 568 C~2nw7 2016 11 02.53154 03 19 59.596 +18 22 08.25 24.6w 15VW170 568 C~2nw7 2016 11 04.40663 03 19 51.037 +18 21 35.49 24.6w 15VW170 568 C~2nw7 2016 12 24.32550 03 16 16.822 +18 07 48.74 24.4w 15VW170 568 C~2nw7 2017 01 02.42780 03 15 49.572 +18 06 01.79 24.6w 15VW170 568 C~2nw7 2017 01 26.34230 03 15 09.495 +18 03 21.79 24.5w 15VW170 568 C~2nw7 2017 01 27.27995 03 15 08.947 +18 03 19.55 24.4w 15VW170 568 C~2nw7 2017 09 15.56413 03 27 40.560 +18 49 14.33 15VW170 568 C~2nw7 2017 09 15.58856 03 27 40.507 +18 49 14.05 24.4w 15VW170 568 C~2nw7 2017 09 20.61305 03 27 30.334 +18 48 36.45 15VW170 568 C~2nw7 2017 09 22.57478 03 27 25.834 +18 48 19.60 24.3w 15VW170 568 C~2nw7 2017 12 13.39064 03 21 52.206 +18 27 39.63 24.6w 15VW170 568 C~2nw7 2017 12 13.42791 03 21 52.042 +18 27 39.17 24.7w 15VW170 568 C~2nw7 2024 12 31.109150 03 55 22.857 +20 10 23.58 24.3G 15VW170 G37 C~8cQu 2024 12 31.160370 03 55 22.675 +20 10 22.92 15VW170 G37 C~8cQu 2024 12 31.211110 03 55 22.488 +20 10 22.45 15VW170 G37 C~8cQu
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 -0.02
2 0.0133 0.00 0.03 0.00 -0.05
3 0.0819 0.00 -0.05 0.00 0.00
4 0.0821 0.00 -0.07 0.00 0.00
5 0.0875 0.00 -0.07 0.00 0.07
6 0.1662 0.00 0.07 0.00 -0.01
7 0.1663 0.00 0.06 0.00 0.04
8 0.1664 0.00 0.13 0.00 0.06
9 0.1749 0.00 -0.15 0.00 -0.08
10 0.1936 0.00 0.01 0.00 -0.01
11 0.1937 0.00 -0.00 0.00 0.06
12 0.2457 0.00 0.04 0.00 0.04
13 0.3168 0.00 -0.03 0.00 0.03
14 0.3357 0.00 -0.01 0.00 0.03
15 0.4125 0.00 -0.00 0.00 0.01
16 0.4262 0.00 -0.10 0.00 -0.04
17 1.0019 0.00 -0.04 0.00 0.02
18 1.0565 0.00 0.03 0.00 0.04
19 1.0619 0.00 0.09 0.00 -0.03
20 1.0783 0.00 0.28 0.00 -0.10
21 1.0838 0.00 0.21 0.00 -0.19
22 1.0841 0.00 -0.02 0.00 -0.09
23 1.0893 0.00 -0.00 0.00 0.01
24 1.0895 0.00 0.00 0.00 0.00
25 1.1551 0.00 -0.03 0.00 0.05
26 1.1602 0.00 0.04 0.00 -0.00
27 1.2969 0.00 0.18 0.00 0.02
28 1.3218 0.00 -0.13 0.00 -0.06
29 1.3873 0.00 0.04 0.00 -0.01
30 1.3899 0.00 -0.01 0.00 0.06
31 2.0231 0.00 -0.01 0.00 0.04
32 2.0232 0.00 -0.11 0.00 -0.07
33 2.0369 0.00 -0.14 0.00 0.09
34 2.0423 0.00 0.03 0.00 -0.05
35 2.2663 0.00 0.07 0.00 0.02
36 2.2664 0.00 -0.10 0.00 0.13
37 9.3155 0.00 -0.02 0.00 0.06
38 9.3156 0.00 0.03 0.00 -0.07
39 9.3158 0.00 -0.03 0.00 -0.00
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.
15VW170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.176 46.176 46.176 ecceobj 0.044 0.044 0.044 incobj 1.032 1.032 1.032 qmin 43.269 43.268 43.266 qmax 48.608 48.609 48.606 amean 45.818 45.819 45.819 amin 45.460 45.454 45.462 amax 46.200 46.200 46.199 emean 0.039 0.040 0.039 emin 0.026 0.026 0.026 emax 0.052 0.052 0.052 imean 2.560 2.560 2.560 imin 2.156 2.156 2.156 imax 2.903 2.903 2.903 excite_mean 0.060 0.060 0.060 fracstop 1.000 1.000 1.000 cjmean 3.119 3.120 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 179.7 179.7 179.9 kozaiamp 180.0 179.9 180.0