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: 15VP173 # Created Mon Apr 28 01:10:44 2025 # Orbit generated from Bernstein formalism # Fitting 30 observations of 30 # Arc: 1.46y # First observation: 2015/08/11 # Last observation: 2017/01/26 Preliminary a, adot, b, bdot, g, gdot: -0.000091 0.019844 -0.000006 0.000583 0.021927 0.000000 # Chi-squared of fit: 5.46 DOF: 54 RMS: 0.08 # Min/Max residuals: -0.17 0.18 # Exact a, adot, b, bdot, g, gdot: 1.374435E-05 1.947480E-02 9.955829E-11 5.738142E-04 2.163890E-02 4.729523E-05 # Covariance matrix: 3.3961E-13 4.0793E-14 1.1319E-14 8.4474E-16 3.6072E-13 1.6360E-11 4.0793E-14 3.0962E-13 8.2761E-15 9.0903E-16 2.8118E-13 1.5210E-11 1.1319E-14 8.2761E-15 1.2441E-13 -1.1723E-13 1.8902E-14 8.5471E-13 8.4474E-16 9.0903E-16 -1.1723E-13 1.7993E-13 1.7658E-15 1.3136E-13 3.6072E-13 2.8118E-13 1.8902E-14 1.7658E-15 6.2365E-13 3.1281E-11 1.6360E-11 1.5210E-11 8.5471E-13 1.3136E-13 3.1281E-11 1.9886E-09 # lat0 lon0 xBary yBary zBary JD0 -3.013631 50.150963 1.015488 0.001627 0.028568 2457246.085349 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 203.62662 +/- 1.996 Argument of Peri: 97.02608 +/- 1.995 Long of Asc Node: 110.66391 +/- 0.018 Inclination: 3.42099 +/- 0.001 Eccentricity: 0.05766040 +/- 0.0008 Semi-Major Axis: 43.85487595 +/- 0.0048 Time of Perihelion: 2503317.6480 +/- 588.0 Perihelion: 41.32618620 +/- 0.0361 Aphelion: 46.38356570 +/- 0.0362 Period (y) 290.4257 +/- 0.05 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 30.32813890 +/- 0.0011 Ecliptic Y 34.75762673 +/- 0.0013 Ecliptic Z -2.42955251 +/- 0.0001 Ecliptic XDOT -0.00188751 +/- 0.0000 Ecliptic YDOT 0.00158004 +/- 0.0000 Ecliptic ZDOT 0.00007224 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 46.19297945 +/- 0.0012 Geocenter to KBO 46.21306538 +/- 0.0017 # Hcoef: 7.77
The following table shows the complete astrometric record for 15VP173. 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 (15VP173) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.58456 03 14 10.070 +14 52 34.03 24.7w 15VP173 568 C~2nwI 2015 09 06.63168 03 14 04.712 +14 50 35.77 25.0w 15VP173 568 C~2nwI 2015 09 12.52133 03 13 55.683 +14 49 39.75 25.0w 15VP173 568 C~2nwI 2015 10 07.45992 03 12 49.184 +14 44 05.06 24.5w 15VP173 568 C~2nwI 2015 10 08.46335 03 12 45.684 +14 43 48.85 24.7w 15VP173 568 C~2nwI 2015 10 08.52236 03 12 45.456 +14 43 48.02 24.8w 15VP173 568 C~2nwI 2015 11 07.36952 03 10 42.402 +14 35 01.26 24.4r 15VP173 568 C~2nwI 2015 11 07.41164 03 10 42.216 +14 35 00.46 24.1r 15VP173 568 C~2nwI 2015 11 07.45387 03 10 42.024 +14 34 59.68 24.2r 15VP173 568 C~2nwI 2015 11 10.54061 03 10 28.073 +14 34 03.82 24.3w 15VP173 568 C~2nwI 2015 11 17.38710 03 09 57.148 +14 32 01.94 24.5w 15VP173 568 C~2nwI 2015 11 17.43381 03 09 56.934 +14 32 01.12 24.6w 15VP173 568 C~2nwI 2015 12 06.39596 03 08 34.857 +14 26 55.78 24.7w 15VP173 568 C~2nwI 2015 12 13.33048 03 08 07.758 +14 25 22.02 24.6w 15VP173 568 C~2nwI 2015 12 13.38903 03 08 07.528 +14 25 21.13 24.5w 15VP173 568 C~2nwI 2016 01 01.38342 03 07 06.856 +14 22 13.79 24.5w 15VP173 568 C~2nwI 2016 01 02.34977 03 07 04.402 +14 22 07.35 24.6w 15VP173 568 C~2nwI 2016 02 10.29646 03 06 29.713 +14 22 32.99 24.9w 15VP173 568 C~2nwI 2016 09 06.59818 03 18 31.430 +15 10 03.22 24.8w 15VP173 568 C~2nwI 2016 09 26.59251 03 17 50.397 +15 06 21.63 24.6w 15VP173 568 C~2nwI 2016 10 10.39652 03 17 05.932 +15 02 55.93 24.6w 15VP173 568 C~2nwI 2016 10 10.45485 03 17 05.713 +15 02 54.97 24.5w 15VP173 568 C~2nwI 2016 11 02.54312 03 15 31.026 +14 56 16.83 24.5w 15VP173 568 C~2nwI 2016 11 02.54892 03 15 31.004 +14 56 16.70 24.7w 15VP173 568 C~2nwI 2016 11 04.41826 03 15 22.665 +14 55 43.38 24.4w 15VP173 568 C~2nwI 2016 11 04.42405 03 15 22.637 +14 55 43.27 24.6w 15VP173 568 C~2nwI 2016 12 29.38526 03 11 40.481 +14 42 38.59 24.8w 15VP173 568 C~2nwI 2017 01 02.39267 03 11 29.743 +14 42 10.19 24.7w 15VP173 568 C~2nwI 2017 01 26.30729 03 10 52.134 +14 41 18.06 24.6w 15VP173 568 C~2nwI 2017 01 26.31474 03 10 52.133 +14 41 18.23 24.6w 15VP173 568 C~2nwI
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 0.10 0.00 0.09
2 0.0713 -106.12 -0.15 -93.58 -0.06
3 0.0874 -247.19 -0.05 -113.07 -0.02
4 0.1557 -1265.86 -0.04 -180.65 0.03
5 0.1585 -1319.12 0.04 -182.82 -0.05
6 0.1586 -1322.53 -0.14 -182.74 0.12
7 0.2403 -3184.30 0.08 -214.88 0.08
8 0.2405 -3187.12 0.16 -214.93 0.02
9 0.2406 -3190.01 0.18 -214.94 0.00
10 0.2490 -3400.16 -0.07 -214.58 0.08
11 0.2678 -3865.54 0.05 -211.70 -0.12
12 0.2679 -3868.75 0.05 -211.65 -0.12
13 0.3198 -5099.53 0.02 -185.17 -0.07
14 0.3388 -5504.14 0.12 -169.20 0.03
15 0.3390 -5507.60 0.00 -169.15 -0.09
16 0.3910 -6407.66 -0.10 -110.88 0.03
17 0.3936 -6443.76 -0.17 -107.40 0.05
18 0.5002 -6922.41 -0.11 54.24 -0.02
19 1.0733 3929.50 -0.05 23.13 -0.01
20 1.1280 3298.03 -0.05 -36.80 0.05
21 1.1658 2622.53 0.01 -67.89 -0.03
22 1.1660 2619.22 -0.05 -67.99 -0.04
23 1.2292 1190.77 0.02 -93.66 -0.01
24 1.2292 1190.43 0.07 -93.70 -0.05
25 1.2343 1065.06 0.03 -94.15 0.01
26 1.2343 1064.64 0.00 -94.15 0.01
27 1.3848 -2249.78 0.07 0.90 -0.03
28 1.3958 -2407.52 -0.06 15.05 0.07
29 1.4613 -2947.41 -0.03 110.48 -0.05
30 1.4613 -2947.38 0.06 110.64 0.09
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.
15VP173 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.247 44.257 44.238 ecceobj 0.048 0.049 0.047 incobj 3.423 3.423 3.423 qmin 40.878 40.809 40.879 qmax 47.206 47.262 47.160 amean 43.944 43.954 43.935 amin 43.603 43.608 43.598 amax 44.299 44.316 44.292 emean 0.050 0.052 0.050 emin 0.034 0.035 0.033 emax 0.066 0.067 0.066 imean 1.901 1.901 1.902 imin 1.176 1.174 1.178 imax 2.564 2.566 2.564 excite_mean 0.061 0.062 0.060 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 188.1 188.2 188.2 kozaiamp 180.0 180.0 179.9