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: 15VU171 # Created Mon Apr 28 01:10:43 2025 # Orbit generated from Bernstein formalism # Fitting 34 observations of 34 # Arc: 2.12y # First observation: 2015/08/11 # Last observation: 2017/09/22 Preliminary a, adot, b, bdot, g, gdot: -0.000088 0.023067 -0.000002 0.000832 0.023709 0.000000 # Chi-squared of fit: 4.69 DOF: 62 RMS: 0.07 # Min/Max residuals: -0.21 0.14 # Exact a, adot, b, bdot, g, gdot: 1.514140E-05 2.264899E-02 7.177551E-07 8.182584E-04 2.335712E-02 5.875634E-04 # Covariance matrix: 2.1415E-13 -2.5980E-14 2.6302E-15 2.0638E-15 1.5078E-13 2.0290E-12 -2.5980E-14 2.9522E-13 9.2195E-16 7.5266E-15 1.6997E-13 6.7059E-12 2.6302E-15 9.2195E-16 1.0228E-13 -7.8622E-14 3.3570E-15 3.6878E-14 2.0638E-15 7.5266E-15 -7.8622E-14 1.0249E-13 6.6380E-15 2.6150E-13 1.5078E-13 1.6997E-13 3.3570E-15 6.6380E-15 2.6138E-13 6.1178E-12 2.0290E-12 6.7059E-12 3.6878E-14 2.6150E-13 6.1178E-12 2.3338E-10 # lat0 lon0 xBary yBary zBary JD0 -1.631450 51.771572 1.014259 0.001763 0.057646 2457246.064839 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 359.83931 +/- 2.022 Argument of Peri: 321.30315 +/- 2.100 Long of Asc Node: 89.23119 +/- 0.011 Inclination: 2.60450 +/- 0.001 Eccentricity: 0.01872654 +/- 0.0001 Semi-Major Axis: 43.58138271 +/- 0.0028 Time of Perihelion: 2457287.4062 +/- 590.2 Perihelion: 42.76525421 +/- 0.0037 Aphelion: 44.39751120 +/- 0.0037 Period (y) 287.7131 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.23920729 +/- 0.0006 Ecliptic Y 32.94551837 +/- 0.0007 Ecliptic Z -1.21884960 +/- 0.0000 Ecliptic XDOT -0.00204328 +/- 0.0000 Ecliptic YDOT 0.00169269 +/- 0.0000 Ecliptic ZDOT 0.00009397 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.76525680 +/- 0.0007 Geocenter to KBO 42.81349173 +/- 0.0009 # Hcoef: 7.52
The following table shows the complete astrometric record for 15VU171. 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 (15VU171) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.56405 03 19 10.228 +16 37 55.76 24.1w 15VU171 568 C~2nwA 2015 09 06.61072 03 19 09.060 +16 37 01.96 24.0w 15VU171 568 C~2nwA 2015 09 12.50083 03 19 00.212 +16 36 17.74 24.2w 15VU171 568 C~2nwA 2015 10 07.42237 03 17 51.492 +16 31 19.21 24.1w 15VU171 568 C~2nwA 2015 10 08.43421 03 17 47.761 +16 31 03.87 24.1w 15VU171 568 C~2nwA 2015 10 08.49327 03 17 47.539 +16 31 03.03 24.1w 15VU171 568 C~2nwA 2015 11 07.34317 03 15 36.153 +16 22 21.57 23.9r 15VU171 568 C~2nwA 2015 11 07.38533 03 15 35.944 +16 22 20.80 23.9r 15VU171 568 C~2nwA 2015 11 07.42748 03 15 35.737 +16 22 19.90 23.3r 15VU171 568 C~2nwB 2015 11 10.51130 03 15 20.722 +16 21 22.29 23.8w 15VU171 568 C~2nwB 2015 11 17.35801 03 14 47.312 +16 19 15.17 24.0w 15VU171 568 C~2nwB 2015 11 17.40462 03 14 47.077 +16 19 14.30 23.9w 15VU171 568 C~2nwB 2015 12 06.36680 03 13 17.951 +16 13 44.62 24.0w 15VU171 568 C~2nwB 2015 12 06.51621 03 13 17.275 +16 13 42.35 24.1w 15VU171 568 C~2nwB 2015 12 13.30120 03 12 48.362 +16 11 59.01 24.0w 15VU171 568 C~2nwB 2015 12 13.35972 03 12 48.120 +16 11 58.21 24.0w 15VU171 568 C~2nwB 2016 01 01.35451 03 11 41.534 +16 08 14.07 24.1w 15VU171 568 C~2nwB 2016 01 07.30127 03 11 26.074 +16 07 27.31 23.8w 15VU171 568 C~2nwB 2016 02 04.33458 03 10 55.906 +16 06 45.25 24.0w 15VU171 568 C~2nwB 2016 09 07.56206 03 24 21.354 +16 59 31.38 15VU171 568 C~2nwB 2016 09 26.62090 03 23 41.236 +16 56 33.38 24.2w 15VU171 568 C~2nwB 2016 10 10.43747 03 22 54.697 +16 53 24.36 24.1w 15VU171 568 C~2nwB 2016 10 10.49616 03 22 54.463 +16 53 23.48 24.1w 15VU171 568 C~2nwB 2016 10 10.51394 03 22 54.396 +16 53 23.25 24.1w 15VU171 568 C~2nwB 2016 11 02.51995 03 21 13.878 +16 46 55.29 24.0w 15VU171 568 C~2nwB 2016 11 04.39506 03 21 04.901 +16 46 21.45 24.1w 15VU171 568 C~2nwB 2016 12 24.31334 03 17 19.647 +16 32 58.92 24.0w 15VU171 568 C~2nwB 2016 12 24.33186 03 17 19.571 +16 32 58.86 24.1w 15VU171 568 C~2nwB 2017 01 02.41556 03 16 50.924 +16 31 28.56 23.9w 15VU171 568 C~2nwB 2017 01 02.43457 03 16 50.867 +16 31 28.49 24.1w 15VU171 568 C~2nwB 2017 01 27.28684 03 16 07.975 +16 29 47.61 24.1w 15VU171 568 C~2nwB 2017 09 15.58250 03 29 24.845 +17 20 45.44 24.2w 15VU171 568 C~2nwB 2017 09 21.62755 03 29 11.997 +17 19 50.20 24.3w 15VU171 568 C~2nwB 2017 09 22.56874 03 29 09.745 +17 19 40.98 24.0w 15VU171 568 C~2nwB
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 -0.03
2 0.0713 -30.05 -0.06 -47.68 0.03
3 0.0874 -164.32 -0.06 -57.73 -0.04
4 0.1557 -1195.92 -0.02 -91.48 -0.06
5 0.1584 -1251.72 -0.06 -92.42 -0.01
6 0.1586 -1255.02 -0.02 -92.41 0.03
7 0.2403 -3216.01 0.14 -104.79 0.03
8 0.2404 -3219.11 0.12 -104.74 0.05
9 0.2406 -3222.22 0.10 -104.84 -0.07
10 0.2490 -3445.93 -0.08 -103.97 -0.04
11 0.2677 -3943.51 0.04 -100.76 -0.03
12 0.2679 -3947.00 -0.02 -100.71 -0.03
13 0.3198 -5272.51 0.01 -81.26 -0.03
14 0.3202 -5282.51 -0.03 -80.88 0.12
15 0.3388 -5711.77 -0.06 -70.53 -0.06
16 0.3389 -5715.34 -0.01 -70.38 -0.03
17 0.3909 -6700.62 0.02 -32.15 0.00
18 0.4072 -6928.05 -0.05 -17.98 0.03
19 0.4840 -7358.79 -0.02 57.33 0.09
20 1.0760 4650.73 0.05 119.68 -0.01
21 1.1282 4048.64 -0.02 91.82 0.10
22 1.1660 3354.46 0.02 77.10 0.00
23 1.1661 3350.99 -0.05 77.10 0.02
24 1.1662 3350.00 -0.00 77.12 0.05
25 1.2292 1855.40 -0.04 67.46 -0.00
26 1.2343 1722.10 0.02 67.55 -0.01
27 1.3710 -1612.46 0.12 123.35 -0.12
28 1.3710 -1613.53 0.02 123.57 0.06
29 1.3959 -2034.82 -0.07 143.22 -0.03
30 1.3959 -2035.63 -0.08 143.36 0.07
31 1.4640 -2657.57 0.04 206.42 0.01
32 2.0972 9185.50 0.13 278.16 0.05
33 2.1138 8993.24 -0.21 269.53 -0.17
34 2.1164 8959.65 0.08 268.48 0.02
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.
15VU171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.000 44.010 43.991 ecceobj 0.028 0.028 0.028 incobj 2.603 2.603 2.603 qmin 41.489 41.475 41.495 qmax 45.997 46.044 46.008 amean 43.665 43.674 43.655 amin 43.333 43.329 43.321 amax 44.011 44.016 44.001 emean 0.030 0.030 0.030 emin 0.011 0.012 0.010 emax 0.046 0.046 0.046 imean 1.030 1.031 1.030 imin 0.130 0.133 0.128 imax 1.622 1.620 1.623 excite_mean 0.036 0.036 0.035 fracstop 1.000 1.000 1.000 cjmean 3.096 3.096 3.096 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 167.0 168.0 165.9 kozaiamp 180.0 179.9 179.9