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: 15VQ169
# Created Mon Apr 28 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting 28 observations of 28
# Arc: 1.44y
# First observation: 2015/08/20
# Last observation: 2017/01/27
Preliminary a, adot, b, bdot, g, gdot:
-0.000106 0.021233 0.000001 0.000258 0.022648 0.000000
# Chi-squared of fit: 3.66 DOF: 50 RMS: 0.06
# Min/Max residuals: -0.11 0.20
# Exact a, adot, b, bdot, g, gdot:
1.460724E-05 2.089640E-02 7.101155E-07 2.545483E-04 2.243241E-02 1.034028E-03
# Covariance matrix:
3.0378E-13 5.9039E-14 -1.4718E-15 6.1144E-15 3.3597E-13 1.5348E-11
5.9039E-14 4.2777E-13 -1.8861E-15 8.4066E-15 3.6863E-13 2.1080E-11
-1.4718E-15 -1.8861E-15 1.2204E-13 -1.2147E-13 -3.0832E-15 -1.8466E-13
6.1144E-15 8.4066E-15 -1.2147E-13 2.0785E-13 1.3296E-14 8.4829E-13
3.3597E-13 3.6863E-13 -3.0832E-15 1.3296E-14 6.5097E-13 3.3357E-11
1.5348E-11 2.1080E-11 -1.8466E-13 8.4829E-13 3.3357E-11 2.1263E-09
# lat0 lon0 xBary yBary zBary JD0
0.118659 54.788180 1.013758 0.000216 -0.041402 2457255.041279
# Heliocentric elements and errors
Epoch: 2457250.5000 = 2015/08/16
Mean Anomaly: 125.48705 +/- 2.600
Argument of Peri: 241.30809 +/- 2.591
Long of Asc Node: 43.90381 +/- 0.018
Inclination: 0.71208 +/- 0.001
Eccentricity: 0.03043921 +/- 0.0017
Semi-Major Axis: 43.82777260 +/- 0.0059
Time of Perihelion: 2420308.6237 +/- 765.3
Perihelion: 42.49369002 +/- 0.0734
Aphelion: 45.16185518 +/- 0.0734
Period (y) 290.1565 +/- 0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 26.55192931 +/- 0.0009
Ecliptic Y 35.87074202 +/- 0.0013
Ecliptic Z 0.09237797 +/- 0.0000
Ecliptic XDOT -0.00201299 +/- 0.0000
Ecliptic YDOT 0.00156724 +/- 0.0000
Ecliptic ZDOT 0.00003138 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 44.62873084 +/- 0.0012
Geocenter to KBO 44.57835022 +/- 0.0016
# Hcoef: 7.47
The following table shows the complete astrometric record for 15VQ169. 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 (15VQ169) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.54049 03 29 36.456 +19 04 49.23 24.5w 15VQ169 568 C~2nw2 2015 09 07.59637 03 29 31.236 +19 04 36.59 24.3w 15VQ169 568 C~2nw2 2015 09 12.44325 03 29 24.908 +19 04 15.56 24.4w 15VQ169 568 C~2nw2 2015 10 07.49180 03 28 21.667 +19 00 37.61 24.2w 15VQ169 568 C~2nw2 2015 10 07.55020 03 28 21.462 +19 00 36.90 24.2w 15VQ169 568 C~2nw2 2015 10 09.53094 03 28 14.536 +19 00 12.65 24.3w 15VQ169 568 C~2nw2 2015 11 06.30734 03 26 17.107 +18 53 16.23 23.6r 15VQ169 568 C~2nw2 2015 11 06.37060 03 26 16.808 +18 53 15.23 24.2r 15VQ169 568 C~2nw2 2015 11 06.44142 03 26 16.461 +18 53 14.16 24.0r 15VQ169 568 C~2nw2 2015 11 07.46098 03 26 11.666 +18 52 56.83 24.0w 15VQ169 568 C~2nw2 2015 11 17.44217 03 25 24.076 +18 50 05.61 23.9w 15VQ169 568 C~2nw2 2015 11 17.48946 03 25 23.838 +18 50 04.73 24.0w 15VQ169 568 C~2nw2 2015 12 06.30809 03 23 56.102 +18 44 46.05 24.2w 15VQ169 568 C~2nw2 2015 12 06.43481 03 23 55.516 +18 44 43.99 23.6w 15VQ169 568 C~2nw2 2015 12 31.32982 03 22 20.417 +18 38 54.08 24.3w 15VQ169 568 C~2nw2 2016 01 07.35914 03 22 00.742 +18 37 41.25 24.2w 15VQ169 568 C~2nw2 2016 02 05.30505 03 21 24.276 +18 35 24.64 24.4w 15VQ169 568 C~2nw2 2016 02 11.25843 03 21 26.417 +18 35 32.44 24.3w 15VQ169 568 C~2nw2 2016 09 07.61990 03 34 26.366 +19 22 41.93 15VQ169 568 C~2nw2 2016 09 27.54346 03 33 48.253 +19 20 37.01 24.1w 15VQ169 568 C~2nw2 2016 10 09.53944 03 33 10.508 +19 18 30.02 24.2w 15VQ169 568 C~2nw2 2016 10 09.61149 03 33 10.251 +19 18 29.15 24.2w 15VQ169 568 C~2nw2 2016 10 31.51783 03 31 40.056 +19 13 20.64 24.7w 15VQ169 568 C~2nw2 2016 11 02.46775 03 31 31.104 +19 12 49.46 24.1w 15VQ169 568 C~2nw2 2016 11 04.44390 03 31 21.932 +19 12 17.65 24.1w 15VQ169 568 C~2nw2 2016 12 29.39711 03 27 21.049 +18 58 07.49 24.2w 15VQ169 568 C~2nw2 2017 01 27.32921 03 26 20.711 +18 54 29.05 24.0w 15VQ169 568 C~2nw2 2017 01 27.33784 03 26 20.701 +18 54 29.06 24.0w 15VQ169 568 C~2nw2
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 -0.11
2 0.0494 -74.85 -0.10 5.70 0.01
3 0.0627 -166.98 0.16 7.09 -0.02
4 0.1313 -1089.79 -0.04 14.23 -0.01
5 0.1314 -1092.78 -0.04 14.25 -0.02
6 0.1369 -1193.96 0.01 14.75 -0.03
7 0.2129 -2911.39 -0.02 20.83 -0.03
8 0.2131 -2915.75 0.02 20.91 0.01
9 0.2133 -2920.79 -0.07 21.09 0.15
10 0.2161 -2991.03 -0.01 21.13 -0.00
11 0.2434 -3688.10 0.09 22.74 -0.03
12 0.2435 -3691.59 -0.03 22.73 -0.06
13 0.2951 -4978.17 0.08 24.95 -0.00
14 0.2954 -4986.75 -0.11 25.04 0.04
15 0.3636 -6383.59 0.03 26.28 0.02
16 0.3828 -6672.86 -0.07 26.53 0.16
17 0.4621 -7209.56 0.05 25.78 -0.05
18 0.4784 -7178.10 0.03 25.60 -0.01
19 1.0516 4244.02 -0.01 58.83 0.01
20 1.1061 3690.20 -0.06 64.96 -0.01
21 1.1389 3140.91 -0.00 68.36 0.00
22 1.1391 3137.16 0.06 68.38 -0.01
23 1.1991 1823.08 0.01 73.76 0.20
24 1.2045 1692.50 -0.00 73.91 -0.02
25 1.2099 1558.74 0.05 74.23 -0.07
26 1.3603 -1960.19 -0.06 79.43 -0.08
27 1.4395 -2843.82 0.02 78.75 -0.05
28 1.4396 -2843.95 -0.00 78.80 -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.
15VQ169 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.235 44.262 44.211 ecceobj 0.031 0.036 0.026 incobj 0.710 0.710 0.710 qmin 41.902 41.679 42.041 qmax 46.119 46.350 45.918 amean 43.911 43.936 43.889 amin 43.573 43.591 43.553 amax 44.259 44.291 44.238 emean 0.027 0.032 0.023 emin 0.011 0.015 0.006 emax 0.043 0.047 0.038 imean 1.455 1.456 1.454 imin 0.721 0.724 0.717 imax 1.988 1.989 1.988 excite_mean 0.038 0.041 0.035 fracstop 1.000 1.000 1.000 cjmean 3.099 3.099 3.099 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 180.5 182.2 178.7 kozaiamp 180.0 180.0 179.9