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: 15VS169 # Created Tue Apr 1 01:10:40 2025 # Orbit generated from Bernstein formalism # Fitting 29 observations of 30 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000118 0.022534 -0.000001 0.000533 0.023382 0.000000 # Chi-squared of fit: 13.45 DOF: 52 RMS: 0.12 # Min/Max residuals: -0.40 0.30 # Exact a, adot, b, bdot, g, gdot: 1.524422E-05 2.239992E-02 5.322922E-07 5.299144E-04 2.338416E-02 1.407046E-03 # Covariance matrix: 1.9862E-13 -2.0971E-15 -5.8006E-17 2.2752E-15 1.4922E-13 2.2513E-12 -2.0971E-15 3.6609E-13 -1.5718E-15 9.5783E-15 2.3769E-13 9.2462E-12 -5.8006E-17 -1.5718E-15 1.1052E-13 -7.3540E-14 -9.1117E-16 -5.3144E-14 2.2752E-15 9.5783E-15 -7.3540E-14 8.9516E-14 7.9768E-15 3.2020E-13 1.4922E-13 2.3769E-13 -9.1117E-16 7.9768E-15 3.1496E-13 7.7697E-12 2.2513E-12 9.2462E-12 -5.3144E-14 3.2020E-13 7.7697E-12 3.0900E-10 # lat0 lon0 xBary yBary zBary JD0 -0.543122 53.715489 0.945076 -0.003259 -0.359265 2457273.101229 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 80.40314 +/- 0.069 Argument of Peri: 253.31141 +/- 0.101 Long of Asc Node: 74.31169 +/- 0.011 Inclination: 1.44666 +/- 0.001 Eccentricity: 0.03886272 +/- 0.0008 Semi-Major Axis: 43.34728666 +/- 0.0040 Time of Perihelion: 2433988.9540 +/- 19.7 Perihelion: 41.66269302 +/- 0.0342 Aphelion: 45.03188030 +/- 0.0343 Period (y) 285.3981 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.27672403 +/- 0.0006 Ecliptic Y 34.20007355 +/- 0.0008 Ecliptic Z -0.40533311 +/- 0.0000 Ecliptic XDOT -0.00201809 +/- 0.0000 Ecliptic YDOT 0.00167889 +/- 0.0000 Ecliptic ZDOT 0.00006053 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.13091178 +/- 0.0008 Geocenter to KBO 42.76398783 +/- 0.0010 # Hcoef: 8.68
The following table shows the complete astrometric record for 15VS169. 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 (15VS169) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.60044 03 25 54.177 +18 10 32.56 25.7w 15VS169 568 C~2nw3 2015 09 12.44733 03 25 47.372 +18 10 05.63 25.3w 15VS169 568 C~2nw3 2015 10 07.49766 03 24 41.109 +18 05 55.21 25.1w 15VS169 568 C~2nw3 2015 10 07.55607 03 24 40.908 +18 05 54.65 25.6w 15VS169 568 C~2nw3 2015 10 09.53675 03 24 33.696 +18 05 27.74 25.1w 15VS169 568 C~2nw3 2015 11 06.31257 03 22 32.523 +17 57 59.53 24.8r 15VS169 568 C~2nw3 2015 11 06.37589 03 22 32.216 +17 57 58.56 24.4r 15VS169 568 C~2nw3 2015 11 06.44667 03 22 31.862 +17 57 57.16 24.2r 15VS169 568 C~2nw3 2015 11 07.46686 03 22 26.912 +17 57 38.85 25.0w 15VS169 568 C~2nw3 2015 11 17.44798 03 21 38.115 +17 54 39.60 25.1w 15VS169 568 C~2nw3 2015 11 17.49527 03 21 37.888 +17 54 38.29 25.2w 15VS169 568 C~2nw3 2015 12 06.31417 03 20 08.399 +17 49 11.57 25.7w 15VS169 568 C~2nw3 2016 01 07.36493 03 18 12.309 +17 42 17.01 25.1w 15VS169 568 C~2nw3 2016 01 07.41708 03 18 12.215 +17 42 16.84 25.5w 15VS169 568 C~2nw3 2016 02 05.31154 03 17 37.912 +17 40 35.91 24.8w 15VS169 568 C~2nw3 2016 02 11.26421 03 17 40.804 +17 40 53.48 25.2w 15VS169 568 C~2nw3 2016 09 07.61412 03 31 05.321 +18 31 00.88 15VS169 568 C~2nw3 2016 09 27.53935 03 30 25.153 +18 28 32.22 25.3w 15VS169 568 C~2nw3 2016 10 09.53365 03 29 45.917 +18 26 10.23 25.6w 15VS169 568 C~2nw3 2016 10 09.60571 03 29 45.650 +18 26 09.48 25.3w 15VS169 568 C~2nw3 2016 11 02.47946 03 28 03.219 +18 20 02.80 25.1w 15VS169 568 C~2nw3 2016 11 04.45547 03 27 53.787 +18 19 29.17 25.5w 15VS169 568 C~2nw3 2016 12 24.34518 03 24 05.941 +18 06 04.11 24.9w 15VS169 568 C~2nw3 2017 01 27.31434 03 22 49.330 +18 01 52.92 25.4w 15VS169 568 C~2nw3 2017 01 27.31949 03 22 49.321 +18 01 53.00 25.7w 15VS169 568 C~2nw3 2017 09 15.55809 03 36 06.970 +18 50 18.10 15VS169 568 C~2nw3 2017 09 16.60340 03 36 05.119 +18 50 11.43 25.4w 15VS169 568 C~2nw3 2017 09 20.60688 03 35 57.144 +18 49 43.17 25.3w 15VS169 568 C~2nw3 2017 12 13.36234 03 30 05.244 +18 29 29.28 25.4w 15VS169 568 C~2nw3 2017 12 13.40466 03 30 05.067 +18 29 28.79 25.5w 15VS169 568 C~2nw3
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 -0.02 0.00 -0.04
2 0.0133 -100.63 0.10 -2.05 -0.04
3 0.0819 -1077.82 -0.14 -9.75 -0.03
4 0.0820 -1080.74 0.09 -9.58 0.13
5 0.0874 -1187.03 -0.15 -9.98 0.09
6 0.1635 -2972.75 0.22 -10.30 0.11
7 0.1637 -2977.23 0.30 -10.14 0.23
8 0.1639 -2982.48 0.17 -10.22 0.11
9 0.1666 -3055.46 -0.07 -10.12 0.02
10 0.1940 -3774.73 -0.10 -7.49 0.07
11 0.1941 -3778.20 -0.09 -7.93 -0.40
12 0.2456 -5097.51 -0.10 1.01 -0.02
13 0.3334 -6808.13 -0.14 25.76 -0.03
14 0.3335 -6809.48 ( 0.48) 25.94 ( 0.10)
15 0.4126 -7309.71 -0.14 54.99 -0.01
16 0.4289 -7265.19 0.16 61.29 -0.01
17 1.0021 4596.53 -0.04 108.77 -0.11
18 1.0566 4005.89 -0.14 102.38 -0.03
19 1.0895 3429.66 0.02 99.83 -0.20
20 1.0897 3425.80 0.13 100.02 -0.01
21 1.1550 1922.09 -0.08 99.84 -0.02
22 1.1605 1783.64 -0.05 100.14 -0.01
23 1.2970 -1561.15 0.08 124.10 -0.18
24 1.3900 -2681.85 -0.03 155.15 0.05
25 1.3901 -2681.96 -0.08 155.26 0.16
26 2.0232 9040.17 -0.10 215.16 -0.02
27 2.0260 9013.01 -0.03 214.83 -0.06
28 2.0370 8896.10 0.05 213.86 0.10
29 2.2663 3744.79 0.00 226.30 0.01
30 2.2664 3742.23 0.17 226.44 0.11
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.
15VS169 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.771 43.786 43.756 ecceobj 0.046 0.047 0.044 incobj 1.444 1.444 1.445 qmin 40.731 40.715 40.836 qmax 46.335 46.385 46.214 amean 43.444 43.455 43.425 amin 43.111 43.124 43.092 amax 43.794 43.807 43.771 emean 0.042 0.043 0.040 emin 0.022 0.024 0.020 emax 0.058 0.059 0.056 imean 0.862 0.862 0.864 imin 0.309 0.305 0.310 imax 1.267 1.265 1.267 excite_mean 0.045 0.046 0.043 fracstop 1.000 1.000 1.000 cjmean 3.092 3.092 3.092 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 186.8 187.2 187.5 kozaiamp 179.9 180.0 180.0