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: 15VQ172
# Created Tue Apr 1 01:10:42 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting 30 observations of 30
# Arc: 9.23y
# First observation: 2015/08/11
# Last observation: 2024/11/01
# Chi-squared of fit: 4.22 DOF: 54 RMS: 0.07
# Min/Max residuals: -0.18 0.13
# Exact a, adot, b, bdot, g, gdot:
1.470901E-05 2.156130E-02 6.084986E-07 3.612991E-04 2.275805E-02 -2.524414E-04
# Covariance matrix:
2.5272E-13 -8.3480E-14 6.9007E-16 -1.2966E-15 1.3836E-13 -3.4657E-13
-8.3480E-14 2.3876E-13 -2.4749E-15 4.2787E-15 7.6749E-14 1.1952E-12
6.9007E-16 -2.4749E-15 6.3180E-14 -1.0398E-14 -9.0547E-16 -1.2757E-14
-1.2966E-15 4.2787E-15 -1.0398E-14 6.6706E-15 1.4643E-15 2.2036E-14
1.3836E-13 7.6749E-14 -9.0547E-16 1.4643E-15 1.8400E-13 4.2427E-13
-3.4657E-13 1.1952E-12 -1.2757E-14 2.2036E-14 4.2427E-13 6.1583E-12
# lat0 lon0 xBary yBary zBary JD0
0.009345 51.099460 1.014870 0.000114 0.045631 2457246.073039
# Heliocentric elements and errors
Epoch: 2457246.5000 = 2015/08/12
Mean Anomaly: 267.35635 +/- 0.094
Argument of Peri: 97.46126 +/- 0.085
Long of Asc Node: 49.21791 +/- 0.001
Inclination: 0.96299 +/- 0.000
Eccentricity: 0.03728602 +/- 0.0001
Semi-Major Axis: 43.76814187 +/- 0.0031
Time of Perihelion: 2484464.0337 +/- 28.9
Perihelion: 42.13620219 +/- 0.0059
Aphelion: 45.40008156 +/- 0.0060
Period (y) 289.5645 +/- 0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 28.35046482 +/- 0.0005
Ecliptic Y 33.52326000 +/- 0.0006
Ecliptic Z 0.00722621 +/- 0.0000
Ecliptic XDOT -0.00203979 +/- 0.0000
Ecliptic YDOT 0.00159889 +/- 0.0000
Ecliptic ZDOT 0.00004352 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.90398625 +/- 0.0006
Geocenter to KBO 43.94053279 +/- 0.0008
# Hcoef: 7.34
The following table shows the complete astrometric record for 15VQ172. 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 (15VQ172) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.57225 03 14 39.888 +18 02 31.32 24.1w 15VQ172 568 C~2nwE 2015 09 06.61892 03 14 35.633 +18 02 21.03 23.8w 15VQ172 568 C~2nwE 2015 10 07.43408 03 13 16.522 +17 57 19.53 24.1w 15VQ172 568 C~2nwE 2015 10 08.44583 03 13 12.785 +17 57 05.16 24.0w 15VQ172 568 C~2nwE 2015 10 08.50488 03 13 12.564 +17 57 04.33 23.9w 15VQ172 568 C~2nwE 2015 11 07.35377 03 11 02.221 +17 48 37.52 23.7r 15VQ172 568 C~2nwE 2015 11 07.39585 03 11 02.014 +17 48 36.80 23.8r 15VQ172 568 C~2nwE 2015 11 07.43803 03 11 01.810 +17 48 36.00 23.6r 15VQ172 568 C~2nwE 2015 11 10.52298 03 10 47.030 +17 47 38.08 23.8w 15VQ172 568 C~2nwE 2015 11 17.36965 03 10 14.203 +17 45 29.08 23.8w 15VQ172 568 C~2nwE 2015 11 17.41626 03 10 13.976 +17 45 28.15 23.8w 15VQ172 568 C~2nwE 2015 12 13.31287 03 08 18.149 +17 37 50.09 23.9w 15VQ172 568 C~2nwE 2015 12 13.37141 03 08 17.920 +17 37 49.18 23.8w 15VQ172 568 C~2nwE 2016 01 01.36607 03 07 13.732 +17 33 33.91 24.0w 15VQ172 568 C~2nwE 2016 02 04.28927 03 06 31.810 +17 30 50.40 24.0w 15VQ172 568 C~2nwE 2016 02 10.27908 03 06 35.570 +17 31 06.67 23.9w 15VQ172 568 C~2nwE 2016 10 10.40808 03 18 08.024 +18 17 24.38 23.9w 15VQ172 568 C~2nwE 2016 10 10.46643 03 18 07.793 +18 17 23.53 24.0w 15VQ172 568 C~2nwE 2016 10 27.50259 03 16 55.675 +18 12 52.27 23.4w 15VQ172 568 C~2nwE 2016 11 02.53733 03 16 27.613 +18 11 05.96 23.8w 15VQ172 568 C~2nwE 2016 11 02.60863 03 16 27.261 +18 11 04.65 23.8w 15VQ172 568 C~2nwE 2016 11 03.52763 03 16 22.934 +18 10 48.20 24.9w 15VQ172 568 C~2nwE 2016 11 04.41248 03 16 18.744 +18 10 32.29 23.9w 15VQ172 568 C~2nwE 2016 12 24.30698 03 12 38.818 +17 56 27.56 24.0w 15VQ172 568 C~2nwE 2016 12 29.38063 03 12 22.701 +17 55 25.03 24.1w 15VQ172 568 C~2nwE 2017 01 02.38784 03 12 11.334 +17 54 41.02 24.0w 15VQ172 568 C~2nwE 2017 01 02.40920 03 12 11.262 +17 54 40.83 24.0w 15VQ172 568 C~2nwE 2024 11 01.398960 03 58 24.970 +20 42 44.83 23.8G 15VQ172 G37 C~8SY2 2024 11 01.445810 03 58 24.738 +20 42 44.04 15VQ172 G37 C~8SY2 2024 11 01.493790 03 58 24.525 +20 42 43.36 15VQ172 G37 C~8SY2
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 0.08 0.00 -0.06
2 0.0713 0.00 -0.18 0.00 0.08
3 0.1557 0.00 -0.00 0.00 0.01
4 0.1584 0.00 -0.05 0.00 0.01
5 0.1586 0.00 0.00 0.00 0.02
6 0.2403 0.00 0.11 0.00 -0.03
7 0.2404 0.00 0.07 0.00 0.03
8 0.2406 0.00 0.08 0.00 0.02
9 0.2490 0.00 -0.00 0.00 -0.01
10 0.2678 0.00 0.03 0.00 0.01
11 0.2679 0.00 0.02 0.00 -0.04
12 0.3388 0.00 -0.03 0.00 -0.02
13 0.3389 0.00 0.10 0.00 -0.00
14 0.3909 0.00 -0.11 0.00 -0.11
15 0.4838 0.00 -0.01 0.00 0.01
16 0.5002 0.00 0.00 0.00 -0.06
17 1.1659 0.00 0.08 0.00 0.01
18 1.1660 0.00 0.03 0.00 -0.02
19 1.2127 0.00 -0.03 0.00 0.02
20 1.2292 0.00 -0.00 0.00 -0.00
21 1.2294 0.00 -0.17 0.00 -0.02
22 1.2319 0.00 0.05 0.00 0.01
23 1.2343 0.00 0.04 0.00 0.04
24 1.3709 0.00 0.08 0.00 0.07
25 1.3848 0.00 0.03 0.00 -0.03
26 1.3958 0.00 0.07 0.00 0.03
27 1.3959 0.00 -0.13 0.00 0.07
28 9.2261 0.00 0.10 0.00 0.13
29 9.2262 0.00 -0.13 0.00 -0.05
30 9.2263 0.00 -0.00 0.00 -0.10
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.
15VQ172 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.172 44.172 44.172 ecceobj 0.033 0.033 0.033 incobj 0.960 0.960 0.960 qmin 41.279 41.276 41.275 qmax 46.618 46.614 46.634 amean 43.851 43.851 43.851 amin 43.509 43.505 43.515 amax 44.203 44.200 44.205 emean 0.039 0.039 0.039 emin 0.022 0.022 0.022 emax 0.055 0.055 0.055 imean 1.256 1.256 1.256 imin 0.467 0.467 0.467 imax 1.808 1.808 1.808 excite_mean 0.046 0.046 0.046 fracstop 1.000 1.000 1.000 cjmean 3.097 3.097 3.097 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 164.5 164.9 164.4 kozaiamp 180.0 180.0 180.0