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: 15VR173 # Created Tue Apr 1 01:10:43 2025 # Orbit generated from Bernstein formalism # Fitting 31 observations of 31 # Arc: 2.11y # First observation: 2015/08/11 # Last observation: 2017/09/21 Preliminary a, adot, b, bdot, g, gdot: -0.000093 0.021137 -0.000006 0.001063 0.022678 0.000000 # Chi-squared of fit: 14.94 DOF: 56 RMS: 0.12 # Min/Max residuals: -0.39 0.26 # Exact a, adot, b, bdot, g, gdot: 1.474705E-05 2.077661E-02 7.330521E-07 1.046482E-03 2.239453E-02 7.526557E-04 # Covariance matrix: 2.2984E-13 -2.8580E-14 5.5041E-15 2.6341E-15 1.6332E-13 2.6574E-12 -2.8580E-14 2.9193E-13 3.4614E-15 8.1480E-15 1.7758E-13 7.3613E-12 5.5041E-15 3.4614E-15 1.1641E-13 -9.2652E-14 8.1325E-15 1.4417E-13 2.6341E-15 8.1480E-15 -9.2652E-14 1.2294E-13 8.0534E-15 3.5478E-13 1.6332E-13 1.7758E-13 8.1325E-15 8.0534E-15 2.8931E-13 7.5742E-12 2.6574E-12 7.3613E-12 1.4417E-13 3.5478E-13 7.5742E-12 3.2011E-10 # lat0 lon0 xBary yBary zBary JD0 -3.132711 50.355284 1.015380 0.001884 0.032180 2457246.085349 # Heliocentric elements and errors Epoch: 2457240.5000 = 2015/08/06 Mean Anomaly: 155.59146 +/- 1.619 Argument of Peri: 154.93547 +/- 1.618 Long of Asc Node: 97.16624 +/- 0.010 Inclination: 4.20676 +/- 0.001 Eccentricity: 0.02756438 +/- 0.0003 Semi-Major Axis: 43.53215923 +/- 0.0029 Time of Perihelion: 2411898.8843 +/- 471.8 Perihelion: 42.33222222 +/- 0.0139 Aphelion: 44.73209623 +/- 0.0140 Period (y) 287.2258 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.20490586 +/- 0.0007 Ecliptic Y 33.66000198 +/- 0.0008 Ecliptic Z -2.44021323 +/- 0.0001 Ecliptic XDOT -0.00189486 +/- 0.0000 Ecliptic YDOT 0.00169040 +/- 0.0000 Ecliptic ZDOT 0.00012277 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.63044813 +/- 0.0008 Geocenter to KBO 44.65375237 +/- 0.0011 # Hcoef: 8.76
The following table shows the complete astrometric record for 15VR173. 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 (15VR173) followed by the observatory code and reference code for the source of the astrometry.
2015 08 11.58456 03 15 06.722 +14 48 53.71 27.8w 15VR173 568 C~2nwI 2015 09 06.63168 03 15 02.223 +14 46 58.46 15VR173 568 C~2nwI 2015 09 12.52133 03 14 53.086 +14 46 01.68 25.1w 15VR173 568 C~2nwI 2015 10 07.45992 03 13 45.128 +14 40 23.42 25.6w 15VR173 568 C~2nwI 2015 10 08.46335 03 13 41.527 +14 40 06.99 25.2w 15VR173 568 C~2nwI 2015 10 08.52236 03 13 41.313 +14 40 05.88 25.5w 15VR173 568 C~2nwI 2015 11 07.36952 03 11 34.648 +14 31 11.80 25.0r 15VR173 568 C~2nwI 2015 11 07.41164 03 11 34.442 +14 31 11.11 24.8r 15VR173 568 C~2nwI 2015 11 07.45387 03 11 34.256 +14 31 10.35 24.9r 15VR173 568 C~2nwI 2015 11 10.54061 03 11 19.898 +14 30 13.78 25.5w 15VR173 568 C~2nwI 2015 11 17.43381 03 10 47.745 +14 28 09.60 25.3w 15VR173 568 C~2nwI 2015 12 06.39596 03 09 23.047 +14 23 01.73 25.6w 15VR173 568 C~2nwI 2015 12 13.33048 03 08 55.044 +14 21 27.49 25.7w 15VR173 568 C~2nwI 2015 12 13.38903 03 08 54.809 +14 21 26.57 25.4w 15VR173 568 C~2nwI 2016 01 01.38342 03 07 52.138 +14 18 21.04 25.8w 15VR173 568 C~2nwI 2016 01 07.33018 03 07 37.720 +14 17 48.22 26.0w 15VR173 568 C~2nwI 2016 02 05.27611 03 07 10.737 +14 18 19.91 25.6w 15VR173 568 C~2nwI 2016 09 06.59818 03 19 45.179 +15 09 05.18 15VR173 568 C~2nwI 2016 09 26.59251 03 19 03.548 +15 05 23.24 25.8w 15VR173 568 C~2nwI 2016 10 10.39652 03 18 18.038 +15 01 55.74 25.2w 15VR173 568 C~2nwI 2016 10 10.45485 03 18 17.816 +15 01 54.85 25.6w 15VR173 568 C~2nwI 2016 11 02.54312 03 16 40.471 +14 55 12.33 25.5w 15VR173 568 C~2nwI 2016 11 02.54892 03 16 40.453 +14 55 12.20 24.2w 15VR173 568 C~2nwI 2016 11 04.41826 03 16 31.851 +14 54 38.46 25.3w 15VR173 568 C~2nwI 2016 11 04.42405 03 16 31.824 +14 54 38.48 25.5w 15VR173 568 C~2nwI 2016 12 29.38526 03 12 42.437 +14 41 29.86 26.1w 15VR173 568 C~2nwI 2017 01 02.39267 03 12 31.361 +14 41 02.28 25.3w 15VR173 568 C~2nwI 2017 01 26.30729 03 11 52.401 +14 40 17.73 25.2w 15VR173 568 C~2nwI 2017 01 26.31474 03 11 52.409 +14 40 17.70 25.1w 15VR173 568 C~2nwI 2017 09 15.57624 03 24 16.072 +15 29 34.96 25.1w 15VR173 568 C~2nwI 2017 09 21.62152 03 24 03.066 +15 28 28.42 25.0w 15VR173 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 -0.02 0.00 0.00
2 0.0713 -93.22 -0.04 -94.08 0.18
3 0.0874 -236.00 -0.30 -114.05 -0.20
4 0.1557 -1276.21 0.05 -180.71 0.03
5 0.1585 -1330.95 0.02 -182.76 -0.03
6 0.1586 -1334.24 0.04 -183.01 -0.18
7 0.2403 -3248.96 0.03 -210.43 -0.03
8 0.2405 -3252.03 -0.05 -210.30 0.08
9 0.2406 -3254.84 0.14 -210.31 0.04
10 0.2490 -3470.93 0.26 -209.29 0.04
11 0.2679 -3954.25 -0.10 -204.38 -0.01
12 0.3198 -5222.80 0.23 -171.43 0.11
13 0.3388 -5640.34 0.04 -152.81 0.05
14 0.3390 -5643.88 -0.06 -152.78 -0.10
15 0.3910 -6571.80 -0.19 -85.83 -0.07
16 0.4072 -6782.66 0.08 -60.77 0.09
17 0.4865 -7152.06 -0.19 75.97 -0.09
18 1.0733 4211.64 -0.04 120.76 -0.04
19 1.1280 3571.73 -0.11 61.75 0.12
20 1.1658 2881.12 0.04 31.80 -0.04
21 1.1660 2877.78 0.03 31.78 0.01
22 1.2292 1410.90 0.11 9.77 -0.06
23 1.2292 1410.61 0.23 9.71 -0.11
24 1.2343 1281.44 -0.01 9.67 -0.06
25 1.2343 1281.06 0.03 9.79 0.06
26 1.3848 -2135.95 -0.39 124.01 0.07
27 1.3958 -2298.24 -0.01 140.04 0.20
28 1.4613 -2855.18 0.03 247.28 0.10
29 1.4613 -2855.07 0.19 247.22 0.00
30 2.0972 8318.55 0.11 310.90 -0.19
31 2.1137 8119.51 -0.16 293.97 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.
15VR173 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.941 43.952 43.931 ecceobj 0.023 0.024 0.022 incobj 4.207 4.207 4.207 qmin 41.904 41.868 41.896 qmax 45.488 45.549 45.506 amean 43.625 43.635 43.615 amin 43.286 43.293 43.277 amax 43.962 43.971 43.951 emean 0.019 0.020 0.019 emin 0.001 0.002 0.002 emax 0.036 0.036 0.036 imean 2.484 2.483 2.485 imin 1.760 1.761 1.757 imax 3.135 3.132 3.138 excite_mean 0.048 0.048 0.048 fracstop 1.000 1.000 1.000 cjmean 3.094 3.094 3.094 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 184.2 183.8 183.9 kozaiamp 179.9 180.0 180.0