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: 15VH172 # Created Tue Apr 1 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 27 observations of 27 # Arc: 2.26y # First observation: 2015/09/12 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000088 0.020476 -0.000003 -0.000258 0.022267 0.000000 # Chi-squared of fit: 6.32 DOF: 48 RMS: 0.09 # Min/Max residuals: -0.13 0.32 # Exact a, adot, b, bdot, g, gdot: 1.463072E-05 2.032422E-02 -2.716252E-07 -2.564847E-04 2.222443E-02 -7.398426E-04 # Covariance matrix: 2.3625E-13 -2.8061E-15 3.4518E-15 -2.9608E-15 1.8626E-13 3.0118E-12 -2.8061E-15 3.5568E-13 4.8645E-15 -9.1742E-15 2.1623E-13 1.0529E-11 3.4518E-15 4.8645E-15 1.1224E-13 -7.7375E-14 6.5773E-15 2.0033E-13 -2.9608E-15 -9.1742E-15 -7.7375E-14 1.0221E-13 -8.1426E-15 -3.8039E-13 1.8626E-13 2.1623E-13 6.5773E-15 -8.1426E-15 3.3178E-13 8.8813E-12 3.0118E-12 1.0529E-11 2.0033E-13 -3.8039E-13 8.8813E-12 4.3684E-10 # lat0 lon0 xBary yBary zBary JD0 -2.800386 51.837025 0.896289 -0.022597 -0.464936 2457278.005699 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 240.89880 +/- 0.466 Argument of Peri: 19.94227 +/- 0.457 Long of Asc Node: 156.50420 +/- 0.017 Inclination: 2.87991 +/- 0.000 Eccentricity: 0.06926706 +/- 0.0008 Semi-Major Axis: 43.83828588 +/- 0.0054 Time of Perihelion: 2492345.0754 +/- 137.2 Perihelion: 40.80173684 +/- 0.0364 Aphelion: 46.87483492 +/- 0.0365 Period (y) 290.2609 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.75778648 +/- 0.0007 Ecliptic Y 35.14768187 +/- 0.0009 Ecliptic Z -2.19832408 +/- 0.0001 Ecliptic XDOT -0.00202764 +/- 0.0000 Ecliptic YDOT 0.00146785 +/- 0.0000 Ecliptic ZDOT -0.00002705 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.46649813 +/- 0.0008 Geocenter to KBO 44.99552253 +/- 0.0012 # Hcoef: 8.54
The following table shows the complete astrometric record for 15VH172. 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 (15VH172) followed by the observatory code and reference code for the source of the astrometry.
2015 09 12.50491 03 20 40.757 +15 31 08.07 25.6w 15VH172 568 C~2nwC 2015 10 07.42821 03 19 36.310 +15 25 42.54 25.0w 15VH172 568 C~2nwC 2015 10 08.44001 03 19 32.828 +15 25 26.79 25.4w 15VH172 568 C~2nwC 2015 10 08.49908 03 19 32.597 +15 25 25.72 25.3w 15VH172 568 C~2nwC 2015 11 07.34843 03 17 29.095 +15 16 40.92 24.9r 15VH172 568 C~2nwC 2015 11 07.39058 03 17 28.896 +15 16 40.24 24.9r 15VH172 568 C~2nwC 2015 11 07.43274 03 17 28.696 +15 16 39.40 24.8r 15VH172 568 C~2nwC 2015 11 10.51713 03 17 14.562 +15 15 43.29 25.4w 15VH172 568 C~2nwC 2015 11 17.36382 03 16 43.062 +15 13 39.60 25.2w 15VH172 568 C~2nwC 2015 11 17.41043 03 16 42.843 +15 13 38.86 25.1w 15VH172 568 C~2nwC 2015 12 13.30706 03 14 50.523 +15 06 45.87 25.7w 15VH172 568 C~2nwC 2015 12 13.36559 03 14 50.291 +15 06 44.93 25.5w 15VH172 568 C~2nwC 2015 12 31.37031 03 13 49.447 +15 03 28.64 25.7w 15VH172 568 C~2nwC 2016 01 07.30705 03 13 31.805 +15 02 40.15 25.2w 15VH172 568 C~2nwC 2016 02 11.22942 03 13 04.596 +15 02 58.66 25.2w 15VH172 568 C~2nwC 2016 09 07.56785 03 25 28.189 +15 48 31.15 15VH172 568 C~2nwC 2016 10 10.44325 03 24 06.569 +15 41 42.22 25.5w 15VH172 568 C~2nwC 2016 10 10.50202 03 24 06.358 +15 41 41.14 25.6w 15VH172 568 C~2nwC 2016 10 10.51973 03 24 06.294 +15 41 40.85 25.5w 15VH172 568 C~2nwC 2016 11 02.51417 03 22 31.753 +15 35 06.28 25.7w 15VH172 568 C~2nwC 2016 11 04.38927 03 22 23.295 +15 34 32.77 25.2w 15VH172 568 C~2nwC 2016 12 28.44224 03 18 37.088 +15 21 08.37 25.5w 15VH172 568 C~2nwC 2017 01 26.34976 03 17 41.524 +15 19 10.09 25.3w 15VH172 568 C~2nwD 2017 09 16.63393 03 29 57.310 +16 03 33.48 25.2w 15VH172 568 C~2nwD 2017 09 23.57295 03 29 42.546 +16 02 16.07 15VH172 568 C~2nwD 2017 12 16.35926 03 24 03.177 +15 40 21.75 25.0w 15VH172 568 C~2nwD 2017 12 16.37785 03 24 03.101 +15 40 21.45 24.8w 15VH172 568 C~2nwD
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 0.02
2 0.0682 -983.94 0.04 -76.49 -0.10
3 0.0710 -1036.64 0.32 -78.81 0.09
4 0.0712 -1040.15 0.00 -78.99 0.04
5 0.1529 -2901.66 0.01 -126.06 -0.09
6 0.1530 -2904.62 -0.02 -125.97 0.01
7 0.1531 -2907.63 -0.10 -126.03 -0.05
8 0.1616 -3119.75 -0.05 -127.30 0.19
9 0.1803 -3592.23 -0.09 -128.59 -0.03
10 0.1804 -3595.49 -0.08 -128.48 0.05
11 0.2513 -5273.80 0.01 -103.53 0.04
12 0.2515 -5277.29 -0.03 -103.56 -0.11
13 0.3008 -6179.84 -0.05 -61.96 -0.06
14 0.3198 -6439.39 0.07 -41.56 0.11
15 0.4154 -6815.14 0.10 80.13 -0.13
16 0.9885 4280.83 0.09 -38.35 -0.03
17 1.0785 3037.26 -0.10 -139.20 0.16
18 1.0787 3034.04 -0.07 -139.48 -0.01
19 1.0788 3033.07 -0.06 -139.53 -0.02
20 1.1417 1611.91 -0.01 -177.09 -0.08
21 1.1468 1485.19 0.01 -178.58 0.01
22 1.2948 -1882.14 -0.10 -121.48 0.11
23 1.3740 -2689.34 0.09 -28.45 -0.12
24 2.0127 8268.95 0.03 -122.96 0.05
25 2.0317 8043.30 -0.02 -145.98 -0.10
26 2.2611 2969.61 0.06 -204.79 0.06
27 2.2611 2968.47 0.00 -204.80 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.
15VH172 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.225 44.237 44.213 ecceobj 0.061 0.062 0.059 incobj 2.874 2.874 2.874 qmin 40.196 40.170 40.247 qmax 47.860 47.946 47.772 amean 43.924 43.937 43.912 amin 43.581 43.591 43.563 amax 44.287 44.304 44.284 emean 0.065 0.066 0.063 emin 0.048 0.050 0.047 emax 0.081 0.082 0.079 imean 2.735 2.732 2.738 imin 1.938 1.932 1.947 imax 3.494 3.491 3.495 excite_mean 0.081 0.082 0.080 fracstop 1.000 1.000 1.000 cjmean 3.093 3.093 3.093 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 175.8 175.9 175.7 kozaiamp 180.0 179.9 179.9