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: 15VM171 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 25 observations of 25 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000073 0.019141 -0.000002 0.000568 0.021531 0.000000 # Chi-squared of fit: 5.18 DOF: 44 RMS: 0.08 # Min/Max residuals: -0.19 0.21 # Exact a, adot, b, bdot, g, gdot: 1.294885E-05 1.900385E-02 3.437973E-07 5.626764E-04 2.148279E-02 -1.070987E-03 # Covariance matrix: 2.2441E-13 2.3664E-14 -8.0833E-17 5.2609E-15 1.9119E-13 5.4865E-12 2.3664E-14 3.5989E-13 -1.8368E-15 1.4889E-14 2.9283E-13 1.5347E-11 -8.0833E-17 -1.8368E-15 1.2339E-13 -9.1439E-14 -1.4438E-15 -1.6038E-13 5.2609E-15 1.4889E-14 -9.1439E-14 1.2834E-13 1.6541E-14 1.0817E-12 1.9119E-13 2.9283E-13 -1.4438E-15 1.6541E-14 4.1747E-13 1.7117E-11 5.4865E-12 1.5347E-11 -1.6038E-13 1.0817E-12 1.7117E-11 1.1120E-09 # lat0 lon0 xBary yBary zBary JD0 -1.180696 52.130664 0.934550 -0.007801 -0.385714 2457273.133899 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 233.83934 +/- 0.636 Argument of Peri: 100.05369 +/- 0.622 Long of Asc Node: 85.92783 +/- 0.017 Inclination: 2.04399 +/- 0.001 Eccentricity: 0.10340817 +/- 0.0012 Semi-Major Axis: 43.97873311 +/- 0.0102 Time of Perihelion: 2494602.7317 +/- 187.8 Perihelion: 39.43097297 +/- 0.0528 Aphelion: 48.52649325 +/- 0.0532 Period (y) 291.6569 +/- 0.10 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.53907780 +/- 0.0009 Ecliptic Y 36.46907533 +/- 0.0011 Ecliptic Z -0.95914339 +/- 0.0000 Ecliptic XDOT -0.00199663 +/- 0.0000 Ecliptic YDOT 0.00137375 +/- 0.0000 Ecliptic ZDOT 0.00007456 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.94113898 +/- 0.0010 Geocenter to KBO 46.54887807 +/- 0.0014 # Hcoef: 8.26
The following table shows the complete astrometric record for 15VM171. 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 (15VM171) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.63311 03 20 08.296 +17 09 35.43 24.9w 15VM171 568 C~2nw9 2015 09 12.49674 03 20 01.180 +17 09 02.79 25.5w 15VM171 568 C~2nw9 2015 10 07.54436 03 18 56.758 +17 04 35.43 25.0w 15VM171 568 C~2nw9 2015 10 07.60373 03 18 56.552 +17 04 34.66 25.7w 15VM171 568 C~2nw9 2015 10 09.58362 03 18 49.725 +17 04 07.22 25.2w 15VM171 568 C~2nw9 2015 11 07.33788 03 16 51.870 +16 56 27.42 25.6r 15VM171 568 C~2nw9 2015 11 07.38006 03 16 51.675 +16 56 26.74 25.0r 15VM171 568 C~2nw9 2015 11 07.42224 03 16 51.488 +16 56 25.97 24.8r 15VM171 568 C~2nw9 2015 11 10.50536 03 16 37.595 +16 55 32.80 25.1w 15VM171 568 C~2nw9 2015 12 06.36096 03 14 43.589 +16 48 25.84 25.1w 15VM171 568 C~2nw9 2015 12 06.49848 03 14 43.033 +16 48 23.99 24.9w 15VM171 568 C~2nw9 2016 01 01.34872 03 13 13.223 +16 43 05.11 25.1w 15VM171 568 C~2nw9 2016 02 05.28768 03 12 28.266 +16 41 10.81 24.8w 15VM171 568 C~2nw9 2016 02 10.30807 03 12 30.511 +16 41 29.28 25.4w 15VM171 568 C~2nw9 2016 09 07.62568 03 24 30.071 +17 27 54.20 15VM171 568 C~2nw9 2016 09 26.58416 03 23 52.384 +17 25 15.98 25.8w 15VM171 568 C~2nw9 2016 10 09.54522 03 23 12.023 +17 22 36.63 25.0w 15VM171 568 C~2nw9 2016 10 09.61729 03 23 11.761 +17 22 35.70 25.3w 15VM171 568 C~2nw9 2016 11 04.40084 03 21 26.925 +17 15 56.49 25.1w 15VM171 568 C~2nw9 2016 12 24.31334 03 17 57.560 +17 03 19.73 25.0w 15VM171 568 C~2nw9 2017 01 02.41556 03 17 30.587 +17 01 49.62 25.2w 15VM171 568 C~2nw9 2017 01 26.32908 03 16 49.884 +16 59 54.23 25.6w 15VM171 568 C~2nw9 2017 01 27.28684 03 16 49.264 +16 59 53.49 24.9w 15VM171 568 C~2nw9 2017 12 16.34929 03 22 51.380 +17 23 41.49 25.1w 15VM171 568 C~2nw9 2017 12 16.36856 03 22 51.305 +17 23 41.45 24.7w 15VM171 568 C~2nw9
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 0.21 0.00 0.01
2 0.0133 -106.95 -0.03 -5.48 -0.14
3 0.0819 -1068.18 -0.05 -27.14 0.08
4 0.0821 -1071.23 -0.04 -27.12 0.12
5 0.0875 -1172.89 0.02 -28.47 0.01
6 0.1662 -2925.01 -0.04 -35.83 -0.04
7 0.1663 -2927.88 -0.07 -35.76 0.00
8 0.1664 -2930.68 -0.00 -35.81 -0.06
9 0.1749 -3137.05 -0.04 -35.37 -0.19
10 0.2457 -4828.93 -0.18 -20.29 0.00
11 0.2460 -4837.12 0.16 -19.99 0.16
12 0.3168 -6166.43 0.00 11.81 -0.06
13 0.4125 -6820.21 0.03 72.46 0.04
14 0.4262 -6784.18 0.07 81.73 -0.03
15 1.0020 3905.20 -0.06 115.31 0.06
16 1.0539 3343.28 -0.03 97.21 0.04
17 1.0894 2743.93 0.09 88.15 -0.04
18 1.0896 2740.06 0.05 88.19 0.03
19 1.1602 1186.53 -0.11 81.50 -0.04
20 1.2969 -1907.94 0.01 118.43 0.10
21 1.3218 -2304.95 -0.08 131.40 0.04
22 1.3873 -2898.82 0.02 171.30 0.03
23 1.3899 -2907.61 0.03 172.90 -0.08
24 2.2744 2474.26 -0.00 225.37 -0.14
25 2.2744 2473.21 0.05 225.61 0.07
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.
15VM171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.348 44.372 44.326 ecceobj 0.094 0.097 0.091 incobj 2.042 2.042 2.042 qmin 38.781 38.671 38.928 qmax 49.649 49.748 49.447 amean 44.066 44.091 44.042 amin 43.714 43.733 43.686 amax 44.447 44.483 44.430 emean 0.098 0.102 0.095 emin 0.081 0.085 0.078 emax 0.117 0.119 0.113 imean 0.765 0.773 0.758 imin 0.474 0.462 0.486 imax 1.098 1.119 1.075 excite_mean 0.099 0.103 0.096 fracstop 1.000 1.000 1.000 cjmean 3.090 3.090 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 193.2 193.1 193.6 kozaiamp 179.9 180.0 179.9