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: 15VK170 # Created Mon Apr 28 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 33 observations of 33 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000101 0.022648 -0.000003 0.000575 0.023480 0.000000 # Chi-squared of fit: 6.43 DOF: 60 RMS: 0.08 # Min/Max residuals: -0.22 0.37 # Exact a, adot, b, bdot, g, gdot: 1.534750E-05 2.248732E-02 4.263775E-07 5.705626E-04 2.343951E-02 1.501228E-03 # Covariance matrix: 1.8861E-13 -4.5440E-14 1.0243E-15 1.1744E-15 1.2472E-13 1.5564E-12 -4.5440E-14 3.2026E-13 -3.8814E-16 6.8848E-15 1.5803E-13 8.1604E-12 1.0243E-15 -3.8814E-16 1.0353E-13 -8.0613E-14 1.0622E-15 -1.2255E-14 1.1744E-15 6.8848E-15 -8.0613E-14 1.0913E-13 5.1840E-15 2.6590E-13 1.2472E-13 1.5803E-13 1.0622E-15 5.1840E-15 2.4041E-13 6.3486E-12 1.5564E-12 8.1604E-12 -1.2255E-14 2.6590E-13 6.3486E-12 3.1558E-10 # lat0 lon0 xBary yBary zBary JD0 -1.718900 53.156854 0.941392 -0.010914 -0.368638 2457273.121609 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 78.91405 +/- 0.064 Argument of Peri: 225.83348 +/- 0.104 Long of Asc Node: 102.24802 +/- 0.017 Inclination: 2.21274 +/- 0.001 Eccentricity: 0.04301205 +/- 0.0008 Semi-Major Axis: 43.31913673 +/- 0.0046 Time of Perihelion: 2434442.3898 +/- 18.3 Perihelion: 41.45589174 +/- 0.0345 Aphelion: 45.18238173 +/- 0.0346 Period (y) 285.1201 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 26.54077217 +/- 0.0005 Ecliptic Y 33.85740477 +/- 0.0007 Ecliptic Z -1.27969181 +/- 0.0000 Ecliptic XDOT -0.00199761 +/- 0.0000 Ecliptic YDOT 0.00171044 +/- 0.0000 Ecliptic ZDOT 0.00006141 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.03921532 +/- 0.0006 Geocenter to KBO 42.66300173 +/- 0.0009 # Hcoef: 7.37
The following table shows the complete astrometric record for 15VK170. 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 (15VK170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62082 03 24 51.554 +16 53 52.87 24.0w 15VK170 568 C~2nw5 2015 09 12.48448 03 24 44.634 +16 53 17.56 24.0w 15VK170 568 C~2nw5 2015 10 07.52687 03 23 38.217 +16 48 29.77 23.9w 15VK170 568 C~2nw5 2015 10 07.58621 03 23 38.005 +16 48 28.88 24.0w 15VK170 568 C~2nw5 2015 10 09.56611 03 23 30.812 +16 47 59.62 23.8w 15VK170 568 C~2nw5 2015 11 06.33883 03 21 29.977 +16 40 08.61 22.9r 15VK170 568 C~2nw5 2015 11 06.40946 03 21 29.640 +16 40 07.37 24.2r 15VK170 568 C~2nw5 2015 11 06.47899 03 21 29.299 +16 40 06.06 23.8r 15VK170 568 C~2nw5 2015 11 07.49597 03 21 24.401 +16 39 47.56 23.9w 15VK170 568 C~2nw5 2015 11 17.47779 03 20 35.856 +16 36 46.46 24.0w 15VK170 568 C~2nw5 2015 11 17.56554 03 20 35.417 +16 36 44.78 23.7w 15VK170 568 C~2nw5 2015 12 06.34344 03 19 06.754 +16 31 24.52 23.8w 15VK170 568 C~2nw5 2015 12 06.48092 03 19 06.143 +16 31 22.69 23.9w 15VK170 568 C~2nw5 2015 12 31.36453 03 17 31.142 +16 26 03.41 23.9w 15VK170 568 C~2nw5 2016 01 07.39390 03 17 11.856 +16 25 05.64 23.7w 15VK170 568 C~2nw5 2016 02 05.29346 03 16 38.395 +16 24 14.86 23.8w 15VK170 568 C~2nw5 2016 02 11.24684 03 16 41.390 +16 24 43.57 24.1w 15VK170 568 C~2nw5 2016 09 07.57941 03 30 01.427 +17 14 40.63 24.2w 15VK170 568 C~2nw5 2016 09 27.51468 03 29 21.096 +17 11 40.17 24.0w 15VK170 568 C~2nw5 2016 09 29.49059 03 29 15.337 +17 11 16.43 24.1w 15VK170 568 C~2nw5 2016 10 05.49370 03 28 56.100 +17 09 58.62 24.1w 15VK170 568 C~2nw5 2016 10 07.49825 03 28 49.132 +17 09 30.92 15VK170 568 C~2nw5 2016 10 07.59395 03 28 48.767 +17 09 29.58 24.2w 15VK170 568 C~2nw5 2016 10 09.49835 03 28 41.913 +17 09 02.43 24.3w 15VK170 568 C~2nw5 2016 10 09.57103 03 28 41.641 +17 09 01.39 23.9w 15VK170 568 C~2nw5 2016 11 02.47368 03 26 59.431 +17 02 33.26 23.8w 15VK170 568 C~2nw5 2016 11 04.44969 03 26 50.036 +17 01 58.64 23.9w 15VK170 568 C~2nw5 2016 12 28.46047 03 22 49.650 +16 48 08.08 24.1w 15VK170 568 C~2nw5 2016 12 29.39076 03 22 46.636 +16 47 58.53 23.3w 15VK170 568 C~2nw5 2017 01 27.30287 03 21 48.313 +16 45 32.87 24.1w 15VK170 568 C~2nw5 2017 09 16.62789 03 34 59.548 +17 33 58.40 23.9w 15VK170 568 C~2nw5 2017 09 23.56691 03 34 44.774 +17 32 55.14 23.9w 15VK170 568 C~2nw5 2017 12 13.38599 03 29 01.065 +17 12 25.26 23.8w 15VK170 568 C~2nw5
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 -0.04 0.00 -0.01
2 0.0133 -104.99 -0.02 -9.43 0.00
3 0.0819 -1100.16 -0.03 -49.60 -0.00
4 0.0820 -1103.33 0.03 -49.70 -0.04
5 0.0875 -1210.66 -0.02 -52.12 -0.05
6 0.1635 -3009.30 -0.10 -70.23 0.01
7 0.1637 -3014.30 0.02 -70.20 0.01
8 0.1639 -3019.38 -0.01 -70.23 -0.03
9 0.1667 -3092.17 -0.03 -70.29 -0.05
10 0.1940 -3813.18 -0.04 -68.25 -0.02
11 0.1942 -3819.71 -0.13 -68.27 -0.08
12 0.2456 -5134.58 0.08 -52.39 -0.02
13 0.2460 -5143.55 0.37 -51.90 0.26
14 0.3142 -6547.31 -0.12 -8.94 0.05
15 0.3334 -6830.59 -0.02 6.95 0.01
16 0.4125 -7309.36 -0.00 82.59 -0.01
17 0.4288 -7260.23 -0.00 99.16 0.02
18 1.0019 4614.47 -0.03 115.97 0.04
19 1.0565 4009.81 0.08 81.51 0.04
20 1.0619 3923.96 0.02 78.60 0.04
21 1.0784 3637.53 -0.02 70.41 -0.02
22 1.0839 3533.89 0.08 67.95 -0.02
23 1.0841 3528.49 -0.16 67.93 0.05
24 1.0893 3426.56 0.06 65.62 -0.02
25 1.0895 3422.53 0.07 65.56 -0.01
26 1.1550 1906.43 0.05 49.21 -0.04
27 1.1604 1767.30 -0.00 48.91 -0.02
28 1.3083 -1780.67 0.02 104.64 0.06
29 1.3108 -1824.96 -0.02 106.30 -0.22
30 1.3900 -2672.30 -0.02 176.79 0.04
31 2.0260 9039.65 0.02 217.14 0.04
32 2.0450 8818.98 -0.02 205.69 0.01
33 2.2663 3742.36 -0.07 195.26 -0.01
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.
15VK170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.746 43.763 43.730 ecceobj 0.050 0.051 0.048 incobj 2.213 2.213 2.213 qmin 40.550 40.464 40.586 qmax 46.539 46.608 46.417 amean 43.414 43.431 43.398 amin 43.077 43.088 43.067 amax 43.761 43.785 43.744 emean 0.047 0.048 0.045 emin 0.028 0.029 0.026 emax 0.064 0.065 0.061 imean 1.097 1.099 1.096 imin 0.000 0.000 0.000 imax 1.782 1.787 1.778 excite_mean 0.051 0.053 0.050 fracstop 1.000 1.000 1.000 cjmean 3.091 3.091 3.091 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 171.0 171.0 170.9 kozaiamp 180.0 179.9 180.0