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: 15VS171 # Created Mon Apr 28 01:10:43 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: -0.000113 0.021380 -0.000004 0.000943 0.022739 0.000000 # Chi-squared of fit: 4.47 DOF: 52 RMS: 0.07 # Min/Max residuals: -0.23 0.15 # Exact a, adot, b, bdot, g, gdot: 1.470787E-05 2.101821E-02 -5.819622E-08 9.297361E-04 2.248764E-02 2.099379E-03 # Covariance matrix: 2.2643E-13 2.4017E-14 1.4723E-15 7.6995E-15 1.9699E-13 5.9271E-12 2.4017E-14 4.1522E-13 -1.3815E-15 2.2846E-14 3.0726E-13 1.7407E-11 1.4723E-15 -1.3815E-15 1.0984E-13 -9.5065E-14 3.7973E-16 -1.4994E-13 7.6995E-15 2.2846E-14 -9.5065E-14 1.5037E-13 2.3964E-14 1.5610E-12 1.9699E-13 3.0726E-13 3.7973E-16 2.3964E-14 4.1047E-13 1.8316E-11 5.9271E-12 1.7407E-11 -1.4994E-13 1.5610E-12 1.8316E-11 1.1876E-09 # lat0 lon0 xBary yBary zBary JD0 -1.578453 51.368058 1.014640 0.001513 0.050506 2457246.064839 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 91.42960 +/- 0.291 Argument of Peri: 227.65709 +/- 0.255 Long of Asc Node: 82.41945 +/- 0.011 Inclination: 2.95018 +/- 0.001 Eccentricity: 0.07468169 +/- 0.0016 Semi-Major Axis: 44.09987279 +/- 0.0120 Time of Perihelion: 2430073.6831 +/- 85.8 Perihelion: 40.80641991 +/- 0.0706 Aphelion: 47.39332566 +/- 0.0709 Period (y) 292.8628 +/- 0.12 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.50909158 +/- 0.0008 Ecliptic Y 34.05170390 +/- 0.0010 Ecliptic Z -1.22489568 +/- 0.0000 Ecliptic XDOT -0.00183958 +/- 0.0000 Ecliptic YDOT 0.00179327 +/- 0.0000 Ecliptic ZDOT 0.00010617 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.42732504 +/- 0.0009 Geocenter to KBO 44.46887560 +/- 0.0013 # Hcoef: 8.37
The following table shows the complete astrometric record for 15VS171. 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 (15VS171) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.56405 03 17 29.205 +16 34 45.45 24.6w 15VS171 568 C~2nwA 2015 09 06.61072 03 17 26.286 +16 33 50.72 25.5w 15VS171 568 C~2nwA 2015 09 12.50083 03 17 17.370 +16 33 07.35 25.2w 15VS171 568 C~2nwA 2015 10 07.42237 03 16 09.794 +16 28 15.83 25.3w 15VS171 568 C~2nwA 2015 10 08.43421 03 16 06.145 +16 28 00.79 25.0w 15VS171 568 C~2nwA 2015 10 08.49327 03 16 05.933 +16 28 00.01 25.0w 15VS171 568 C~2nwA 2015 11 07.34317 03 13 58.356 +16 19 32.87 24.8r 15VS171 568 C~2nwA 2015 11 07.38533 03 13 58.142 +16 19 32.30 24.5r 15VS171 568 C~2nwA 2015 11 07.42748 03 13 57.948 +16 19 31.49 24.9r 15VS171 568 C~2nwA 2015 11 10.51130 03 13 43.427 +16 18 35.77 24.8w 15VS171 568 C~2nwA 2015 11 17.35801 03 13 11.123 +16 16 32.29 25.1w 15VS171 568 C~2nwA 2015 11 17.40462 03 13 10.889 +16 16 31.39 24.9w 15VS171 568 C~2nwA 2015 12 06.36680 03 11 44.865 +16 11 11.80 25.1w 15VS171 568 C~2nwA 2015 12 13.30120 03 11 16.351 +16 09 29.54 24.8w 15VS171 568 C~2nwA 2015 12 13.35972 03 11 16.126 +16 09 28.68 25.0w 15VS171 568 C~2nwA 2016 01 01.35451 03 10 12.029 +16 05 51.56 25.2w 15VS171 568 C~2nwA 2016 01 07.30127 03 09 57.174 +16 05 06.37 24.9w 15VS171 568 C~2nwA 2016 02 04.33458 03 09 28.267 +16 04 25.67 25.2w 15VS171 568 C~2nwA 2016 02 11.22361 03 09 32.265 +16 05 01.13 25.2w 15VS171 568 C~2nwA 2016 09 07.56206 03 22 14.319 +16 55 24.78 15VS171 568 C~2nwA 2016 10 10.43747 03 20 48.868 +16 49 25.36 24.9w 15VS171 568 C~2nwA 2016 10 10.49616 03 20 48.636 +16 49 24.51 25.2w 15VS171 568 C~2nwA 2016 10 10.51394 03 20 48.565 +16 49 24.35 25.1w 15VS171 568 C~2nwA 2016 11 02.51995 03 19 10.984 +16 43 06.55 24.9w 15VS171 568 C~2nwA 2016 11 04.39506 03 19 02.297 +16 42 33.56 24.9w 15VS171 568 C~2nwA 2016 12 24.33186 03 15 25.279 +16 29 34.96 25.5w 15VS171 568 C~2nwA 2017 01 26.32220 03 14 17.395 +16 26 29.77 25.4w 15VS171 568 C~2nwA 2017 01 27.28684 03 14 16.832 +16 26 30.17 25.0w 15VS171 568 C~2nwA 2017 12 16.39181 03 20 46.839 +16 53 15.95 15VS171 568 C~2nwA
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 0.01 0.00 0.15
2 0.0713 -54.72 0.09 -41.99 0.05
3 0.0874 -189.77 -0.06 -50.64 0.07
4 0.1557 -1204.00 0.07 -79.43 -0.03
5 0.1584 -1258.59 -0.11 -80.26 -0.06
6 0.1586 -1261.74 0.00 -80.22 0.01
7 0.2403 -3166.55 0.13 -88.58 -0.23
8 0.2404 -3169.67 -0.00 -88.32 0.00
9 0.2406 -3172.58 0.08 -88.37 -0.07
10 0.2490 -3388.97 0.06 -87.05 0.13
11 0.2677 -3870.32 0.10 -83.40 0.01
12 0.2679 -3873.80 -0.07 -83.38 -0.02
13 0.3198 -5153.75 -0.10 -63.12 0.04
14 0.3388 -5577.22 -0.13 -52.33 0.06
15 0.3389 -5580.57 0.01 -52.30 -0.02
16 0.3909 -6529.44 -0.04 -14.81 -0.04
17 0.4072 -6748.05 0.00 -0.98 0.02
18 0.4840 -7160.80 0.04 71.64 -0.01
19 0.5028 -7095.69 -0.03 90.33 -0.02
20 1.0760 4276.66 0.02 148.64 -0.01
21 1.1660 2998.61 0.05 112.82 -0.06
22 1.1661 2995.17 -0.07 112.85 -0.01
23 1.1662 2994.14 -0.09 112.96 0.10
24 1.2292 1542.49 -0.07 106.62 0.01
25 1.2343 1413.39 -0.06 106.84 -0.08
26 1.3710 -1801.43 0.05 164.17 0.02
27 1.4614 -2792.44 0.01 241.57 -0.05
28 1.4640 -2800.15 0.02 244.08 -0.03
29 2.3486 3029.27 0.07 343.24 0.08
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.
15VS171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.541 44.582 44.501 ecceobj 0.079 0.083 0.075 incobj 2.947 2.947 2.947 qmin 40.074 39.982 40.267 qmax 48.508 48.809 48.252 amean 44.202 44.242 44.164 amin 43.847 43.882 43.815 amax 44.572 44.624 44.529 emean 0.073 0.077 0.069 emin 0.057 0.061 0.052 emax 0.089 0.094 0.084 imean 1.188 1.183 1.193 imin 0.425 0.414 0.433 imax 1.735 1.731 1.740 excite_mean 0.076 0.080 0.072 fracstop 1.000 1.000 1.000 cjmean 3.097 3.097 3.097 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 189.2 188.8 188.9 kozaiamp 179.9 180.0 180.0