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: 15VN171 # Created Tue Apr 1 01:10:41 2025 # Orbit generated by ELGB # -->Covariance matrix from a Bernstein fit # Fitting 41 observations of 41 # Arc: 9.23y # First observation: 2015/08/11 # Last observation: 2024/11/01 # Chi-squared of fit: 7.92 DOF: 76 RMS: 0.08 # Min/Max residuals: -0.18 0.35 # Exact a, adot, b, bdot, g, gdot: 1.540002E-05 2.042752E-02 6.927140E-07 7.613716E-04 2.217395E-02 4.051436E-04 # Covariance matrix: 1.6772E-13 -7.0512E-14 3.1410E-15 -2.1777E-15 7.8163E-14 -3.2545E-13 -7.0512E-14 1.0253E-13 -2.3091E-15 3.6075E-15 1.0176E-14 5.3935E-13 3.1410E-15 -2.3091E-15 4.8316E-14 -9.4301E-15 1.5118E-15 -1.2587E-14 -2.1777E-15 3.6075E-15 -9.4301E-15 6.5201E-15 5.0512E-16 2.0263E-14 7.8163E-14 1.0176E-14 1.5118E-15 5.0512E-16 8.9980E-14 7.5663E-14 -3.2545E-13 5.3935E-13 -1.2587E-14 2.0263E-14 7.5663E-14 3.0295E-12 # lat0 lon0 xBary yBary zBary JD0 -1.584492 51.066204 1.014905 0.001359 0.044671 2457246.093519 # Heliocentric elements and errors Epoch: 2457246.5000 = 2015/08/12 Mean Anomaly: 189.45473 +/- 0.139 Argument of Peri: 134.02862 +/- 0.138 Long of Asc Node: 86.84497 +/- 0.003 Inclination: 2.62964 +/- 0.000 Eccentricity: 0.03185339 +/- 0.0001 Semi-Major Axis: 43.68820788 +/- 0.0025 Time of Perihelion: 2507213.3474 +/- 41.0 Perihelion: 42.29659020 +/- 0.0035 Aphelion: 45.07982555 +/- 0.0036 Period (y) 288.7716 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.08703106 +/- 0.0004 Ecliptic Y 34.39447311 +/- 0.0005 Ecliptic Z -1.24694482 +/- 0.0000 Ecliptic XDOT -0.00193096 +/- 0.0000 Ecliptic YDOT 0.00161959 +/- 0.0000 Ecliptic ZDOT 0.00009264 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 45.06207194 +/- 0.0004 Geocenter to KBO 45.09796634 +/- 0.0006 # Hcoef: 7.82
The following table shows the complete astrometric record for 15VN171. 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 (15VN171) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.59273 03 16 16.652 +16 29 42.13 24.7w 15VN171 568 C~2nw9 2015 09 06.62350 03 16 12.806 +16 28 41.66 24.4w 15VN171 568 C~2nw9 2015 09 12.51312 03 16 03.794 +16 27 57.50 24.6w 15VN171 568 C~2nw9 2015 10 07.43992 03 14 56.407 +16 23 03.02 24.5w 15VN171 568 C~2nw9 2015 10 07.44703 03 14 56.377 +16 23 02.84 24.8w 15VN171 568 C~2nw9 2015 10 08.45165 03 14 52.783 +16 22 48.05 24.4w 15VN171 568 C~2nw9 2015 10 08.51072 03 14 52.569 +16 22 47.14 24.2w 15VN171 568 C~2nw9 2015 11 07.34317 03 12 46.329 +16 14 19.73 24.2r 15VN171 568 C~2nw9 2015 11 07.38533 03 12 46.134 +16 14 18.95 24.2r 15VN171 568 C~2nw9 2015 11 07.42748 03 12 45.942 +16 14 18.10 24.5r 15VN171 568 C~2nw9 2015 11 10.51130 03 12 31.597 +16 13 22.20 24.4w 15VN171 568 C~2nw9 2015 11 17.37547 03 11 59.612 +16 11 18.70 24.5w 15VN171 568 C~2nw9 2015 11 17.42215 03 11 59.393 +16 11 17.81 24.5w 15VN171 568 C~2nw9 2015 12 06.36680 03 10 34.644 +16 05 59.13 24.5w 15VN171 568 C~2nw9 2015 12 06.51621 03 10 33.992 +16 05 56.83 24.5w 15VN171 568 C~2nw9 2015 12 13.30120 03 10 06.556 +16 04 17.20 24.6w 15VN171 568 C~2nw9 2015 12 13.35972 03 10 06.323 +16 04 16.40 24.4w 15VN171 568 C~2nw9 2016 01 01.35451 03 09 03.281 +16 00 40.04 24.4w 15VN171 568 C~2nw9 2016 01 07.30127 03 08 48.700 +15 59 54.85 24.5w 15VN171 568 C~2nw9 2016 02 04.33458 03 08 20.564 +15 59 13.45 24.6w 15VN171 568 C~2nw9 2016 02 11.22361 03 08 24.611 +15 59 48.50 24.6w 15VN171 568 C~2nw9 2016 09 06.60560 03 20 54.578 +16 49 25.79 24.6w 15VN171 568 C~2nw9 2016 09 26.59656 03 20 13.378 +16 46 21.59 24.6w 15VN171 568 C~2nw9 2016 10 10.40230 03 19 28.093 +16 43 15.48 24.6w 15VN171 568 C~2nw9 2016 10 10.46065 03 19 27.867 +16 43 14.58 24.4w 15VN171 568 C~2nw9 2016 10 27.49679 03 18 18.049 +16 38 39.00 24.6w 15VN171 568 C~2nw9 2016 11 02.60285 03 17 50.521 +16 36 52.82 24.6w 15VN171 568 C~2nw9 2016 11 03.52184 03 17 46.306 +16 36 36.58 24.6w 15VN171 568 C~2nw9 2016 12 24.29598 03 14 08.179 +16 23 23.00 24.6w 15VN171 568 C~2nw9 2016 12 24.30148 03 14 08.164 +16 23 22.97 24.8w 15VN171 568 C~2nw9 2017 01 02.39822 03 13 41.109 +16 21 55.71 24.5w 15VN171 568 C~2nw9 2017 01 02.40371 03 13 41.088 +16 21 55.52 24.6w 15VN171 568 C~2nw9 2017 01 26.29235 03 13 01.547 +16 20 17.96 24.6w 15VN171 568 C~2nw9 2017 09 16.60944 03 25 22.740 +17 08 38.51 24.6w 15VN171 568 C~2nw9 2017 09 17.60038 03 25 20.753 +17 08 29.95 24.7w 15VN171 568 C~2nw9 2017 09 23.54857 03 25 07.190 +17 07 32.12 15VN171 568 C~2nw9 2017 09 24.59522 03 25 04.513 +17 07 20.94 24.9w 15VN171 568 C~2nw9 2017 12 16.39181 03 19 22.008 +16 46 08.87 24.5w 15VN171 568 C~2nw9 2024 11 01.392110 03 56 44.668 +19 12 34.18 25.0G 15VN171 G37 C~8SY2 2024 11 01.439010 03 56 44.462 +19 12 33.41 15VN171 G37 C~8SY2 2024 11 01.487070 03 56 44.248 +19 12 32.78 15VN171 G37 C~8SY2
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 -0.16 0.00 -0.07
2 0.0713 0.00 0.35 0.00 -0.16
3 0.0874 0.00 -0.07 0.00 0.02
4 0.1556 0.00 0.10 0.00 -0.00
5 0.1557 0.00 0.04 0.00 -0.08
6 0.1584 0.00 -0.09 0.00 0.07
7 0.1586 0.00 -0.04 0.00 0.04
8 0.2402 0.00 -0.08 0.00 0.14
9 0.2404 0.00 -0.03 0.00 0.12
10 0.2405 0.00 0.07 0.00 0.03
11 0.2489 0.00 0.00 0.00 -0.01
12 0.2677 0.00 -0.02 0.00 0.03
13 0.2678 0.00 0.01 0.00 -0.03
14 0.3197 0.00 0.04 0.00 -0.09
15 0.3201 0.00 -0.18 0.00 -0.06
16 0.3387 0.00 -0.01 0.00 -0.04
17 0.3389 0.00 -0.02 0.00 -0.02
18 0.3909 0.00 0.01 0.00 0.08
19 0.4071 0.00 0.05 0.00 0.05
20 0.4839 0.00 0.06 0.00 -0.00
21 0.5028 0.00 0.12 0.00 0.08
22 1.0733 0.00 0.06 0.00 0.07
23 1.1280 0.00 -0.06 0.00 -0.01
24 1.1658 0.00 -0.01 0.00 0.03
25 1.1660 0.00 -0.10 0.00 -0.01
26 1.2126 0.00 0.04 0.00 0.01
27 1.2293 0.00 0.08 0.00 0.05
28 1.2318 0.00 -0.01 0.00 -0.05
29 1.3709 0.00 0.01 0.00 -0.00
30 1.3709 0.00 0.06 0.00 0.03
31 1.3958 0.00 -0.03 0.00 0.01
32 1.3958 0.00 -0.12 0.00 -0.13
33 1.4612 0.00 -0.06 0.00 0.02
34 2.1000 0.00 -0.05 0.00 -0.01
35 2.1027 0.00 -0.02 0.00 0.10
36 2.1190 0.00 0.09 0.00 -0.01
37 2.1218 0.00 0.05 0.00 -0.06
38 2.3485 0.00 0.12 0.00 -0.06
39 9.2260 0.00 -0.06 0.00 0.10
40 9.2261 0.00 0.00 0.00 -0.05
41 9.2263 0.00 0.02 0.00 -0.04
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.
15VN171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.090 44.090 44.090 ecceobj 0.023 0.023 0.023 incobj 2.628 2.628 2.628 qmin 41.860 41.860 41.862 qmax 45.879 45.876 45.881 amean 43.778 43.778 43.777 amin 43.438 43.440 43.437 amax 44.125 44.124 44.126 emean 0.024 0.024 0.024 emin 0.007 0.007 0.008 emax 0.040 0.040 0.040 imean 0.963 0.963 0.963 imin 0.158 0.158 0.158 imax 1.489 1.489 1.489 excite_mean 0.030 0.030 0.030 fracstop 1.000 1.000 1.000 cjmean 3.098 3.098 3.098 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 208.0 208.1 207.9 kozaiamp 179.9 179.9 179.9