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: 15VP171 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 37 observations of 37 # Arc: 2.35y # First observation: 2015/08/11 # Last observation: 2017/12/16 Preliminary a, adot, b, bdot, g, gdot: -0.000101 0.023708 -0.000004 0.001476 0.024064 0.000000 # Chi-squared of fit: 10.75 DOF: 68 RMS: 0.10 # Min/Max residuals: -0.30 0.19 # Exact a, adot, b, bdot, g, gdot: 1.473889E-05 2.326176E-02 7.371980E-07 1.449851E-03 2.372515E-02 -2.552462E-04 # Covariance matrix: 1.9781E-13 -7.7311E-15 1.5798E-15 4.7838E-15 1.3824E-13 1.9333E-12 -7.7311E-15 2.6667E-13 -1.4022E-15 1.5585E-14 1.6794E-13 6.0255E-12 1.5798E-15 -1.4022E-15 9.4109E-14 -6.5867E-14 7.8249E-16 -4.2693E-14 4.7838E-15 1.5585E-14 -6.5867E-14 7.8835E-14 1.3842E-14 4.9654E-13 1.3824E-13 1.6794E-13 7.8249E-16 1.3842E-14 2.3662E-13 5.4363E-12 1.9333E-12 6.0255E-12 -4.2693E-14 4.9654E-13 5.4363E-12 1.9206E-10 # lat0 lon0 xBary yBary zBary JD0 -1.761067 51.204801 1.014780 0.001585 0.047611 2457246.064839 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 308.87188 +/- 0.382 Argument of Peri: 28.82973 +/- 0.447 Long of Asc Node: 76.35093 +/- 0.004 Inclination: 3.94198 +/- 0.001 Eccentricity: 0.04648273 +/- 0.0005 Semi-Major Axis: 43.31625672 +/- 0.0032 Time of Perihelion: 2472029.2734 +/- 110.4 Perihelion: 41.30279876 +/- 0.0216 Aphelion: 45.32971467 +/- 0.0217 Period (y) 285.0917 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.15279047 +/- 0.0006 Ecliptic Y 32.16230563 +/- 0.0007 Ecliptic Z -1.29525206 +/- 0.0000 Ecliptic XDOT -0.00210946 +/- 0.0000 Ecliptic YDOT 0.00165658 +/- 0.0000 Ecliptic ZDOT 0.00016819 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 42.11134778 +/- 0.0006 Geocenter to KBO 42.14937271 +/- 0.0009 # Hcoef: 8.29
The following table shows the complete astrometric record for 15VP171. 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 (15VP171) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.56405 03 17 01.619 +16 21 38.14 24.6w 15VP171 568 C~2nwA 2015 09 06.61072 03 16 59.185 +16 20 43.12 25.7w 15VP171 568 C~2nwA 2015 09 12.50083 03 16 49.956 +16 19 58.08 25.1w 15VP171 568 C~2nwA 2015 10 07.42237 03 15 39.370 +16 14 53.95 24.5w 15VP171 568 C~2nwA 2015 10 08.43421 03 15 35.548 +16 14 38.29 24.7w 15VP171 568 C~2nwA 2015 10 08.49327 03 15 35.340 +16 14 37.24 23.6w 15VP171 568 C~2nwA 2015 11 07.34317 03 13 21.612 +16 05 49.55 24.3r 15VP171 568 C~2nwA 2015 11 07.38533 03 13 21.412 +16 05 48.73 24.6r 15VP171 568 C~2nwA 2015 11 07.42748 03 13 21.197 +16 05 48.09 24.5r 15VP171 568 C~2nwA 2015 11 10.51130 03 13 05.971 +16 04 49.89 24.6w 15VP171 568 C~2nwA 2015 11 17.35801 03 12 32.113 +16 02 42.09 24.7w 15VP171 568 C~2nwA 2015 11 17.40462 03 12 31.874 +16 02 41.23 24.7w 15VP171 568 C~2nwA 2015 12 06.36680 03 11 01.832 +15 57 11.90 24.7w 15VP171 568 C~2nwA 2015 12 06.51621 03 11 01.159 +15 57 09.45 25.4w 15VP171 568 C~2nwA 2015 12 13.30120 03 10 32.021 +15 55 27.56 24.7w 15VP171 568 C~2nwA 2015 12 13.35972 03 10 31.782 +15 55 26.67 25.0w 15VP171 568 C~2nwA 2016 01 01.35451 03 09 25.015 +15 51 48.66 24.8w 15VP171 568 C~2nwA 2016 01 07.30127 03 09 09.636 +15 51 04.91 25.1w 15VP171 568 C~2nwA 2016 02 04.33458 03 08 40.574 +15 50 41.83 24.9w 15VP171 568 C~2nwA 2016 02 11.22361 03 08 45.164 +15 51 24.71 25.1w 15VP171 568 C~2nwA 2016 09 07.56206 03 22 17.252 +16 46 07.23 15VP171 568 C~2nwA 2016 09 26.62090 03 21 35.782 +16 43 06.65 24.4w 15VP171 568 C~2nwA 2016 10 10.43747 03 20 48.145 +16 39 54.98 24.7w 15VP171 568 C~2nwA 2016 10 10.49616 03 20 47.918 +16 39 54.12 24.8w 15VP171 568 C~2nwA 2016 10 10.51394 03 20 47.843 +16 39 53.92 24.8w 15VP171 568 C~2nwA 2016 11 02.51995 03 19 05.430 +16 33 21.34 24.7w 15VP171 568 C~2nwA 2016 12 24.30148 03 15 08.603 +16 19 26.48 15VP171 568 C~2nwA 2016 12 24.33186 03 15 08.484 +16 19 26.20 23.1w 15VP171 568 C~2nwA 2017 01 02.40371 03 14 39.840 +16 17 59.17 24.8w 15VP171 568 C~2nwA 2017 01 02.43457 03 14 39.761 +16 17 58.98 24.9w 15VP171 568 C~2nwA 2017 01 26.29235 03 13 58.063 +16 16 30.52 24.8w 15VP171 568 C~2nwA 2017 01 26.32220 03 13 58.050 +16 16 30.57 25.0w 15VP171 568 C~2nwA 2017 09 15.58250 03 27 26.851 +17 10 17.47 25.0w 15VP171 568 C~2nwA 2017 09 17.60038 03 27 22.781 +17 10 00.26 24.9w 15VP171 568 C~2nwA 2017 09 21.62755 03 27 13.593 +17 09 21.90 24.9w 15VP171 568 C~2nwA 2017 09 22.56874 03 27 11.259 +17 09 12.49 24.8w 15VP171 568 C~2nwA 2017 12 16.39181 03 21 02.809 +16 47 05.49 24.7w 15VP171 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 0.16 0.00 0.05
2 0.0713 -48.12 -0.17 -44.03 0.06
3 0.0874 -188.11 -0.11 -53.00 0.08
4 0.1557 -1248.55 0.09 -81.71 -0.05
5 0.1584 -1305.77 -0.11 -82.43 -0.04
6 0.1586 -1308.93 0.14 -82.66 -0.25
7 0.2403 -3306.72 0.05 -85.61 0.02
8 0.2404 -3309.72 0.19 -85.64 -0.05
9 0.2406 -3312.88 0.17 -85.44 0.11
10 0.2490 -3539.96 -0.03 -83.60 -0.02
11 0.2677 -4044.60 -0.02 -77.66 0.02
12 0.2679 -4048.15 -0.09 -77.57 0.03
13 0.3198 -5388.00 0.07 -49.83 -0.05
14 0.3202 -5398.01 0.10 -49.60 -0.12
15 0.3388 -5830.55 -0.11 -35.55 0.10
16 0.3389 -5834.11 -0.02 -35.49 0.01
17 0.3909 -6821.45 -0.10 12.63 0.03
18 0.4072 -7047.20 0.01 30.14 0.14
19 0.4840 -7457.80 -0.16 120.86 -0.15
20 0.5028 -7382.37 0.02 144.33 -0.00
21 1.0760 4763.86 0.01 255.53 0.05
22 1.1282 4141.56 -0.30 232.06 0.13
23 1.1660 3430.63 -0.01 221.05 -0.00
24 1.1661 3427.26 0.10 221.06 0.01
25 1.1662 3426.16 0.06 221.14 0.09
26 1.2292 1902.37 -0.00 218.88 -0.03
27 1.3709 -1604.80 0.02 297.25 -0.02
28 1.3710 -1606.53 -0.11 297.43 0.07
29 1.3959 -2027.32 -0.06 321.60 -0.00
30 1.3959 -2028.47 0.09 321.71 0.03
31 1.4613 -2631.05 -0.02 394.24 -0.09
32 1.4614 -2631.21 0.10 394.34 -0.09
33 2.0972 9432.95 0.03 548.43 0.02
34 2.1028 9372.05 0.09 546.16 0.08
35 2.1138 9234.69 -0.11 541.54 -0.17
36 2.1164 9199.88 -0.03 540.69 -0.03
37 2.3486 3744.23 0.09 583.66 0.06
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.
15VP171 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.724 43.732 43.716 ecceobj 0.049 0.049 0.048 incobj 3.936 3.936 3.936 qmin 40.012 39.975 39.977 qmax 47.017 47.063 47.036 amean 43.391 43.399 43.384 amin 43.061 43.056 43.048 amax 43.751 43.751 43.747 emean 0.056 0.057 0.056 emin 0.036 0.036 0.036 emax 0.075 0.076 0.075 imean 2.287 2.289 2.284 imin 1.327 1.328 1.321 imax 3.249 3.250 3.253 excite_mean 0.070 0.070 0.069 fracstop 1.000 1.000 1.000 cjmean 3.088 3.088 3.088 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 168.1 167.8 168.4 kozaiamp 179.9 179.9 180.0