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: 15VT172 # Created Tue Apr 1 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 29 observations of 29 # Arc: 2.35y # First observation: 2015/08/11 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000083 0.022716 0.000000 -0.000386 0.023418 0.000000 # Chi-squared of fit: 12.14 DOF: 52 RMS: 0.11 # Min/Max residuals: -0.32 0.29 # Exact a, adot, b, bdot, g, gdot: 1.544885E-05 2.226271E-02 1.594630E-07 -3.788399E-04 2.305514E-02 -2.367475E-04 # Covariance matrix: 2.5490E-13 -9.4512E-15 9.7529E-16 -2.2887E-15 1.9132E-13 2.8644E-12 -9.4512E-15 3.5677E-13 2.5233E-15 -8.1290E-15 2.2463E-13 9.9951E-12 9.7529E-16 2.5233E-15 1.1568E-13 -9.0667E-14 2.5237E-15 1.0716E-13 -2.2887E-15 -8.1290E-15 -9.0667E-14 1.2288E-13 -7.2589E-15 -3.4980E-13 1.9132E-13 2.2463E-13 2.5237E-15 -7.2589E-15 3.3138E-13 8.9766E-12 2.8644E-12 9.9951E-12 1.0716E-13 -3.4980E-13 8.9766E-12 4.2983E-10 # lat0 lon0 xBary yBary zBary JD0 -0.140649 51.454812 1.014567 0.000249 0.051924 2457246.073039 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 303.42022 +/- 0.563 Argument of Peri: 248.93146 +/- 0.666 Long of Asc Node: 221.93538 +/- 0.008 Inclination: 0.98879 +/- 0.001 Eccentricity: 0.04254430 +/- 0.0008 Semi-Major Axis: 44.31263532 +/- 0.0041 Time of Perihelion: 2474174.0720 +/- 168.6 Perihelion: 42.42738530 +/- 0.0363 Aphelion: 46.19788533 +/- 0.0364 Period (y) 294.9848 +/- 0.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.78491256 +/- 0.0007 Ecliptic Y 33.25079044 +/- 0.0008 Ecliptic Z -0.10643432 +/- 0.0000 Ecliptic XDOT -0.00208737 +/- 0.0000 Ecliptic YDOT 0.00161898 +/- 0.0000 Ecliptic ZDOT -0.00004486 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.33160231 +/- 0.0008 Geocenter to KBO 43.37427505 +/- 0.0011 # Hcoef: 8.64
The following table shows the complete astrometric record for 15VT172. 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 (15VT172) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.57225 03 16 16.350 +17 59 24.89 24.6w 15VT172 568 C~2nwE 2015 09 12.50905 03 16 04.535 +17 58 26.03 25.1w 15VT172 568 C~2nwE 2015 10 07.43408 03 14 55.146 +17 53 47.78 25.2w 15VT172 568 C~2nwE 2015 10 08.44583 03 14 51.408 +17 53 33.01 25.0w 15VT172 568 C~2nwE 2015 10 08.50488 03 14 51.163 +17 53 32.16 25.3w 15VT172 568 C~2nwE 2015 11 07.35377 03 12 40.196 +17 44 51.49 24.8r 15VT172 568 C~2nwE 2015 11 07.39585 03 12 39.987 +17 44 50.73 25.2r 15VT172 568 C~2nwE 2015 11 07.43803 03 12 39.772 +17 44 49.91 24.8r 15VT172 568 C~2nwE 2015 11 10.52298 03 12 24.879 +17 43 50.34 25.1w 15VT172 568 C~2nwE 2015 11 17.36965 03 11 51.749 +17 41 38.36 25.0w 15VT172 568 C~2nwE 2015 11 17.41626 03 11 51.517 +17 41 37.43 25.3w 15VT172 568 C~2nwE 2015 12 06.37850 03 10 23.520 +17 35 45.25 25.5w 15VT172 568 C~2nwE 2015 12 13.31287 03 09 54.427 +17 33 48.39 25.5w 15VT172 568 C~2nwE 2015 12 13.37141 03 09 54.189 +17 33 47.45 25.2w 15VT172 568 C~2nwE 2016 01 01.36607 03 08 49.096 +17 29 25.68 25.4w 15VT172 568 C~2nwE 2016 01 07.31283 03 08 34.142 +17 28 25.06 25.5w 15VT172 568 C~2nwE 2016 02 04.28927 03 08 06.198 +17 26 32.60 25.5w 15VT172 568 C~2nwE 2016 09 26.60062 03 20 46.363 +18 14 49.77 24.8w 15VT172 568 C~2nwE 2016 10 10.40808 03 19 59.634 +18 11 48.85 25.2w 15VT172 568 C~2nwE 2016 10 10.46643 03 19 59.402 +18 11 47.93 25.1w 15VT172 568 C~2nwE 2016 11 02.53154 03 18 18.864 +18 05 19.70 25.1w 15VT172 568 C~2nwE 2016 11 02.53733 03 18 18.829 +18 05 19.63 25.4w 15VT172 568 C~2nwE 2016 11 04.40663 03 18 09.927 +18 04 45.14 25.4w 15VT172 568 C~2nwE 2016 11 04.41248 03 18 09.894 +18 04 45.08 15VT172 568 C~2nwE 2016 12 24.32550 03 14 27.488 +17 50 21.06 15VT172 568 C~2nwE 2017 01 02.42780 03 13 59.517 +17 48 31.81 15VT172 568 C~2nwE 2017 01 26.34230 03 13 19.103 +17 45 53.66 25.6w 15VT172 568 C~2nwE 2017 09 22.57478 03 26 16.494 +18 33 48.05 25.2w 15VT172 568 C~2nwE 2017 12 16.34929 03 20 16.253 +18 11 13.47 24.8w 15VT172 568 C~2nwE
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 -0.09
2 0.0874 -178.08 -0.04 -12.87 0.03
3 0.1557 -1206.66 0.00 -22.37 -0.18
4 0.1584 -1262.03 0.00 -22.62 -0.09
5 0.1586 -1265.62 -0.27 -22.52 0.00
6 0.2403 -3207.22 0.22 -31.26 0.04
7 0.2404 -3210.30 0.19 -31.20 0.09
8 0.2406 -3213.48 0.07 -31.17 0.11
9 0.2490 -3434.49 0.02 -32.13 -0.15
10 0.2678 -3926.09 -0.07 -33.46 0.03
11 0.2679 -3929.54 -0.12 -33.48 0.01
12 0.3198 -5236.41 0.11 -36.70 -0.04
13 0.3388 -5668.83 0.06 -37.58 -0.08
14 0.3389 -5672.36 0.10 -37.57 -0.09
15 0.3909 -6640.39 0.02 -38.76 0.20
16 0.4072 -6863.00 0.02 -39.29 -0.07
17 0.4838 -7278.86 -0.32 -39.28 0.29
18 1.1281 3958.17 0.06 -98.22 -0.14
19 1.1659 3268.05 -0.03 -103.22 0.04
20 1.1660 3264.62 -0.11 -103.26 -0.01
21 1.2292 1779.66 0.13 -110.38 -0.04
22 1.2292 1779.16 0.05 -110.32 0.02
23 1.2343 1647.61 0.06 -110.89 -0.03
24 1.2343 1647.14 0.01 -110.82 0.03
25 1.3710 -1641.97 -0.02 -118.11 0.13
26 1.3959 -2056.10 0.10 -118.36 0.20
27 1.4614 -2654.69 -0.18 -118.51 -0.11
28 2.1164 8796.94 -0.09 -176.09 -0.02
29 2.3485 3488.03 0.07 -197.96 -0.09
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.
15VT172 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.731 44.741 44.721 ecceobj 0.044 0.044 0.043 incobj 0.983 0.983 0.983 qmin 41.518 41.554 41.549 qmax 47.462 47.470 47.416 amean 44.390 44.400 44.380 amin 44.046 44.055 44.040 amax 44.747 44.755 44.741 emean 0.045 0.045 0.045 emin 0.030 0.030 0.030 emax 0.061 0.061 0.060 imean 2.499 2.498 2.500 imin 1.858 1.859 1.859 imax 3.047 3.046 3.050 excite_mean 0.063 0.063 0.063 fracstop 1.000 1.000 1.000 cjmean 3.101 3.101 3.101 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 182.6 182.5 182.8 kozaiamp 179.9 180.0 180.0