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: 15VQ202
# Created Mon Apr 28 01:10:44 2025
# Orbit generated from Bernstein formalism
# Fitting 21 observations of 21
# Arc: 1.44y
# First observation: 2015/08/20
# Last observation: 2017/01/27
Preliminary a, adot, b, bdot, g, gdot:
-0.000114 0.022326 0.000001 0.000936 0.023228 0.000000
# Chi-squared of fit: 6.04 DOF: 36 RMS: 0.09
# Min/Max residuals: -0.26 0.21
# Exact a, adot, b, bdot, g, gdot:
1.483112E-05 2.197372E-02 2.336660E-07 9.252963E-04 2.300474E-02 3.122909E-04
# Covariance matrix:
3.8417E-13 7.2369E-14 -5.4020E-15 2.5800E-14 4.1211E-13 1.8970E-11
7.2369E-14 6.8073E-13 -8.4498E-15 4.2152E-14 5.1054E-13 3.0968E-11
-5.4020E-15 -8.4498E-15 1.5505E-13 -1.6930E-13 -1.1838E-14 -7.4861E-13
2.5800E-14 4.2152E-14 -1.6930E-13 3.3139E-13 5.7911E-14 3.7703E-12
4.1211E-13 5.1054E-13 -1.1838E-14 5.7911E-14 8.0037E-13 4.2561E-11
1.8970E-11 3.0968E-11 -7.4861E-13 3.7703E-12 4.2561E-11 2.7694E-09
# lat0 lon0 xBary yBary zBary JD0
0.193214 54.475417 1.013517 0.000289 -0.046935 2457255.041279
# Heliocentric elements and errors
Epoch: 2457250.5000 = 2015/08/16
Mean Anomaly: 299.42815 +/- 4.964
Argument of Peri: 66.42835 +/- 5.236
Long of Asc Node: 48.58675 +/- 0.003
Inclination: 2.42701 +/- 0.001
Eccentricity: 0.01301619 +/- 0.0021
Semi-Major Axis: 43.80004754 +/- 0.0037
Time of Perihelion: 2475065.2051 +/- 1460.0
Perihelion: 43.22993776 +/- 0.0919
Aphelion: 44.37015731 +/- 0.0919
Period (y) 289.8812 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 26.10586349 +/- 0.0010
Ecliptic Y 34.82714454 +/- 0.0014
Ecliptic Z 0.14662270 +/- 0.0000
Ecliptic XDOT -0.00210899 +/- 0.0000
Ecliptic YDOT 0.00154311 +/- 0.0000
Ecliptic ZDOT 0.00011030 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.52548223 +/- 0.0012
Geocenter to KBO 43.46929770 +/- 0.0017
# Hcoef: 8.32
The following table shows the complete astrometric record for 15VQ202. 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 (15VQ202) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.54049 03 28 14.811 +19 04 35.23 25.2w 15VQ202 568 C~4nAh 2015 09 07.59637 03 28 09.165 +19 04 29.80 24.8w 15VQ202 568 C~4nAh 2015 09 12.44325 03 28 02.595 +19 04 09.93 24.8w 15VQ202 568 C~4nAh 2015 10 09.53094 03 26 50.126 +19 00 11.05 24.9w 15VQ202 568 C~4nAh 2015 11 06.30734 03 24 49.727 +18 53 12.65 24.9r 15VQ202 568 C~4nAh 2015 11 06.37060 03 24 49.420 +18 53 11.57 24.8r 15VQ202 568 C~4nAh 2015 11 06.44142 03 24 49.068 +18 53 10.33 24.8r 15VQ202 568 C~4nAh 2015 11 07.46098 03 24 44.151 +18 52 52.97 25.1w 15VQ202 568 C~4nAh 2015 11 17.48946 03 23 55.221 +18 49 59.68 15VQ202 568 C~4nAh 2015 12 06.30809 03 22 25.639 +18 44 38.34 24.5w 15VQ202 568 C~4nAh 2015 12 06.43481 03 22 25.035 +18 44 36.22 25.3w 15VQ202 568 C~4nAh 2015 12 31.32982 03 20 48.385 +18 38 45.34 25.1w 15VQ202 568 C~4nAh 2016 01 07.35914 03 20 28.507 +18 37 32.94 24.7w 15VQ202 568 C~4nAh 2016 02 05.30505 03 19 52.496 +18 35 25.00 24.4w 15VQ202 568 C~4nAh 2016 02 11.25843 03 19 54.981 +18 35 35.30 25.1w 15VQ202 568 C~4nAh 2016 09 07.61990 03 33 17.388 +19 25 53.01 24.9w 15VQ202 568 C~4nAh 2016 09 27.54346 03 32 38.104 +19 23 54.05 25.0w 15VQ202 568 C~4nAh 2016 10 09.53944 03 31 59.299 +19 21 48.66 25.0w 15VQ202 568 C~4nAh 2016 10 09.61149 03 31 59.040 +19 21 47.77 24.9w 15VQ202 568 C~4nAh 2016 12 29.39711 03 26 01.851 +19 01 20.18 24.8w 15VQ202 568 C~4nAh 2017 01 27.32921 03 25 01.107 +18 57 45.01 25.1w 15VQ202 568 C~4nAh
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 0.06 0.00 0.08
2 0.0494 -78.94 0.00 14.31 -0.01
3 0.0627 -174.11 0.10 17.85 -0.25
4 0.1369 -1228.90 -0.11 38.74 0.10
5 0.2129 -2987.65 0.02 56.83 -0.00
6 0.2131 -2992.14 0.04 56.87 -0.03
7 0.2133 -2997.29 -0.05 56.91 -0.05
8 0.2161 -3069.22 -0.07 57.50 -0.07
9 0.2435 -3785.24 -0.02 63.32 0.12
10 0.2951 -5097.91 0.04 72.27 0.09
11 0.2954 -5106.75 -0.26 72.39 0.11
12 0.3636 -6525.23 0.10 81.30 -0.04
13 0.3828 -6817.20 -0.06 83.33 -0.09
14 0.4621 -7345.44 0.21 90.48 0.17
15 0.4784 -7308.61 0.01 91.40 -0.13
16 1.0516 4467.14 -0.05 207.28 0.04
17 1.1061 3898.81 -0.01 223.99 0.05
18 1.1389 3335.49 -0.01 233.40 0.00
19 1.1391 3331.71 0.12 233.41 -0.05
20 1.3603 -1875.26 0.00 274.88 0.03
21 1.4395 -2763.38 -0.06 280.39 -0.08
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.
15VQ202 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.205 44.220 44.192 ecceobj 0.016 0.015 0.017 incobj 2.417 2.417 2.418 qmin 42.216 42.316 42.069 qmax 45.696 45.601 45.801 amean 43.875 43.888 43.862 amin 43.539 43.556 43.523 amax 44.219 44.227 44.203 emean 0.019 0.017 0.021 emin 0.002 0.000 0.004 emax 0.034 0.031 0.036 imean 1.618 1.615 1.620 imin 0.858 0.864 0.854 imax 2.161 2.146 2.173 excite_mean 0.035 0.034 0.037 fracstop 1.000 1.000 1.000 cjmean 3.098 3.099 3.098 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 159.7 157.2 160.2 kozaiamp 179.9 180.0 179.9