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: 15VG172 # Created Mon Apr 28 01:10:43 2025 # Orbit generated from Bernstein formalism # Fitting 26 observations of 26 # Arc: 2.35y # First observation: 2015/08/11 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000112 0.019803 -0.000008 0.000464 0.021923 0.000000 # Chi-squared of fit: 8.55 DOF: 46 RMS: 0.10 # Min/Max residuals: -0.29 0.18 # Exact a, adot, b, bdot, g, gdot: 1.420336E-05 1.946210E-02 2.362995E-07 4.542748E-04 2.165446E-02 1.850668E-03 # Covariance matrix: 3.1257E-13 4.3009E-14 1.1434E-14 -1.2973E-15 2.9157E-13 9.6187E-12 4.3009E-14 5.8570E-13 1.3416E-14 -4.0387E-15 4.3256E-13 2.9644E-11 1.1434E-14 1.3416E-14 1.2525E-13 -1.0969E-13 2.0523E-14 8.9640E-13 -1.2973E-15 -4.0387E-15 -1.0969E-13 1.7179E-13 -4.0285E-15 -2.9112E-13 2.9157E-13 4.3256E-13 2.0523E-14 -4.0285E-15 5.8444E-13 2.9666E-11 9.6187E-12 2.9644E-11 8.9640E-13 -2.9112E-13 2.9666E-11 2.1359E-09 # lat0 lon0 xBary yBary zBary JD0 -3.184042 51.747545 1.014308 0.003269 0.056512 2457246.102289 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 120.96932 +/- 1.008 Argument of Peri: 162.59100 +/- 0.980 Long of Asc Node: 118.91216 +/- 0.019 Inclination: 3.42695 +/- 0.000 Eccentricity: 0.08582171 +/- 0.0017 Semi-Major Axis: 43.96677438 +/- 0.0155 Time of Perihelion: 2421459.0380 +/- 297.5 Perihelion: 40.19347058 +/- 0.0759 Aphelion: 47.74007818 +/- 0.0764 Period (y) 291.5380 +/- 0.15 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.30453314 +/- 0.0010 Ecliptic Y 35.53612678 +/- 0.0013 Ecliptic Z -2.56494636 +/- 0.0001 Ecliptic XDOT -0.00178777 +/- 0.0000 Ecliptic YDOT 0.00170308 +/- 0.0000 Ecliptic ZDOT 0.00004441 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.13188614 +/- 0.0012 Geocenter to KBO 46.17986205 +/- 0.0016 # Hcoef: 8.53
The following table shows the complete astrometric record for 15VG172. 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 (15VG172) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.60150 03 20 43.611 +15 07 30.54 25.3w 15VG172 568 C~2nwC 2015 10 07.42821 03 19 29.745 +14 59 21.97 25.0w 15VG172 568 C~2nwC 2015 10 08.44001 03 19 26.285 +14 59 05.83 25.3w 15VG172 568 C~2nwC 2015 10 08.49908 03 19 26.073 +14 59 05.00 25.6w 15VG172 568 C~2nwC 2015 11 07.34843 03 17 24.082 +14 50 32.26 25.1r 15VG172 568 C~2nwC 2015 11 07.39058 03 17 23.889 +14 50 31.63 25.4r 15VG172 568 C~2nwC 2015 11 07.43274 03 17 23.686 +14 50 30.85 24.9r 15VG172 568 C~2nwC 2015 11 10.51713 03 17 09.748 +14 49 36.03 25.1w 15VG172 568 C~2nwC 2015 11 10.54648 03 17 09.618 +14 49 35.74 24.9w 15VG172 568 C~2nwC 2015 11 17.36382 03 16 38.668 +14 47 37.05 25.3w 15VG172 568 C~2nwC 2015 11 17.41043 03 16 38.450 +14 47 36.21 25.5w 15VG172 568 C~2nwC 2015 12 06.37266 03 15 15.325 +14 42 36.18 25.3w 15VG172 568 C~2nwC 2015 12 13.30706 03 14 47.626 +14 41 03.12 25.5w 15VG172 568 C~2nwC 2015 12 13.36559 03 14 47.397 +14 41 02.67 25.3w 15VG172 568 C~2nwC 2016 01 01.36029 03 13 44.603 +14 37 55.22 25.5w 15VG172 568 C~2nwC 2016 01 07.30705 03 13 29.850 +14 37 20.04 25.3w 15VG172 568 C~2nwC 2016 02 11.22942 03 13 02.541 +14 38 09.32 25.8w 15VG172 568 C~2nwC 2016 09 07.56785 03 25 08.365 +15 23 56.95 15VG172 568 C~2nwC 2016 09 25.60501 03 24 33.459 +15 20 44.11 26.1w 15VG172 568 C~2nwC 2016 10 10.53987 03 23 47.102 +15 17 10.31 25.5w 15VG172 568 C~2nwC 2016 10 10.58850 03 23 46.914 +15 17 09.50 25.4w 15VG172 568 C~2nwC 2016 11 02.50837 03 22 13.955 +15 10 45.60 25.2w 15VG172 568 C~2nwC 2016 11 04.48449 03 22 05.182 +15 10 11.40 25.8w 15VG172 568 C~2nwC 2016 12 25.28594 03 18 32.720 +14 57 56.61 25.1w 15VG172 568 C~2nwC 2016 12 28.43907 03 18 22.938 +14 57 29.66 25.2w 15VG172 568 C~2nwC 2017 12 16.34460 03 23 34.902 +15 18 18.96 25.1w 15VG172 568 C~2nwC
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 0.00 0.00 0.02
2 0.1556 -1159.34 0.14 -198.64 0.05
3 0.1584 -1211.94 0.05 -201.38 -0.29
4 0.1585 -1215.12 0.02 -201.39 -0.19
5 0.2402 -3055.96 -0.03 -241.28 -0.01
6 0.2404 -3058.83 -0.01 -241.17 0.10
7 0.2405 -3061.88 -0.15 -241.16 0.11
8 0.2489 -3271.33 -0.09 -241.79 -0.17
9 0.2490 -3273.23 0.04 -241.58 0.03
10 0.2677 -3737.61 0.00 -239.85 -0.01
11 0.2678 -3740.88 -0.05 -239.84 -0.05
12 0.3197 -4983.75 0.03 -215.66 0.12
13 0.3387 -5396.26 0.06 -200.48 -0.11
14 0.3388 -5399.58 0.14 -200.04 0.16
15 0.3909 -6328.86 0.01 -142.08 -0.00
16 0.4071 -6544.92 -0.03 -119.74 0.12
17 0.5027 -6914.72 -0.08 32.19 0.02
18 1.0759 3956.65 -0.01 -13.63 -0.02
19 1.1253 3419.41 -0.08 -73.85 -0.09
20 1.1662 2716.38 0.07 -112.26 0.02
21 1.1663 2713.55 -0.11 -112.35 0.02
22 1.2290 1314.67 -0.10 -143.97 0.04
23 1.2345 1183.14 0.18 -144.85 0.11
24 1.3735 -1979.89 -0.16 -68.78 0.12
25 1.3822 -2123.81 0.14 -58.31 0.12
26 2.3484 2562.82 0.04 -1.36 -0.20
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.
15VG172 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.385 44.439 44.335 ecceobj 0.085 0.090 0.080 incobj 3.429 3.429 3.429 qmin 39.673 39.491 39.822 qmax 48.746 49.001 48.465 amean 44.068 44.119 44.019 amin 43.713 43.757 43.665 amax 44.448 44.497 44.385 emean 0.080 0.085 0.076 emin 0.063 0.069 0.059 emax 0.097 0.102 0.092 imean 2.173 2.177 2.172 imin 1.450 1.446 1.451 imax 2.849 2.863 2.845 excite_mean 0.089 0.094 0.085 fracstop 1.000 1.000 1.000 cjmean 3.093 3.092 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 177.5 177.5 177.8 kozaiamp 180.0 180.0 179.9