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: 15VZ170 # Created Tue Apr 1 01:10:41 2025 # Orbit generated from Bernstein formalism # Fitting 34 observations of 34 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000095 0.020782 0.000000 0.001519 0.022427 0.000000 # Chi-squared of fit: 6.40 DOF: 62 RMS: 0.08 # Min/Max residuals: -0.18 0.21 # Exact a, adot, b, bdot, g, gdot: 1.484435E-05 2.066930E-02 1.024860E-06 1.513674E-03 2.242174E-02 2.206578E-03 # Covariance matrix: 1.7907E-13 -3.2135E-14 -1.1358E-15 5.3136E-15 1.1754E-13 1.7720E-12 -3.2135E-14 2.7904E-13 -6.0228E-15 2.4219E-14 1.5435E-13 7.9898E-12 -1.1358E-15 -6.0228E-15 1.0128E-13 -7.4745E-14 -4.7463E-15 -2.5974E-13 5.3136E-15 2.4219E-14 -7.4745E-14 9.6869E-14 1.9986E-14 1.0441E-12 1.1754E-13 1.5435E-13 -4.7463E-15 1.9986E-14 2.2835E-13 6.6166E-12 1.7720E-12 7.9898E-12 -2.5974E-13 1.0441E-12 6.6166E-12 3.4445E-10 # lat0 lon0 xBary yBary zBary JD0 -0.392465 52.570476 0.937512 -0.002444 -0.378535 2457273.129809 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 97.33428 +/- 0.213 Argument of Peri: 247.86499 +/- 0.193 Long of Asc Node: 56.69295 +/- 0.001 Inclination: 4.19418 +/- 0.001 Eccentricity: 0.08479474 +/- 0.0008 Semi-Major Axis: 44.19990606 +/- 0.0074 Time of Perihelion: 2428250.7448 +/- 62.9 Perihelion: 40.45198657 +/- 0.0371 Aphelion: 47.94782556 +/- 0.0374 Period (y) 293.8598 +/- 0.07 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.07677127 +/- 0.0006 Ecliptic Y 35.14632067 +/- 0.0007 Ecliptic Z -0.30544256 +/- 0.0000 Ecliptic XDOT -0.00184155 +/- 0.0000 Ecliptic YDOT 0.00174251 +/- 0.0000 Ecliptic ZDOT 0.00018303 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 44.98513351 +/- 0.0007 Geocenter to KBO 44.59956937 +/- 0.0010 # Hcoef: 8.16
The following table shows the complete astrometric record for 15VZ170. 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 (15VZ170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 21 04.776 +18 02 02.88 24.9w 15VZ170 568 C~2nw7 2015 09 12.49264 03 20 57.546 +18 01 37.47 24.9w 15VZ170 568 C~2nw7 2015 10 07.53854 03 19 50.951 +17 57 38.45 25.2w 15VZ170 568 C~2nw7 2015 10 07.59790 03 19 50.727 +17 57 37.53 23.1w 15VZ170 568 C~2nw7 2015 10 09.57780 03 19 43.629 +17 57 12.04 25.0w 15VZ170 568 C~2nw7 2015 11 07.33264 03 17 40.869 +17 49 45.37 24.8r 15VZ170 568 C~2nw7 2015 11 07.37479 03 17 40.669 +17 49 44.57 24.6r 15VZ170 568 C~2nw7 2015 11 07.41697 03 17 40.462 +17 49 43.75 24.6r 15VZ170 568 C~2nw7 2015 11 10.49950 03 17 25.978 +17 48 50.91 24.9w 15VZ170 568 C~2nw7 2015 11 17.34635 03 16 53.654 +17 46 52.99 24.7w 15VZ170 568 C~2nw8 2015 11 17.39294 03 16 53.429 +17 46 52.13 24.9w 15VZ170 568 C~2nw8 2015 12 06.35508 03 15 26.957 +17 41 37.90 24.7w 15VZ170 568 C~2nw8 2016 01 01.34294 03 13 52.587 +17 36 02.19 25.1w 15VZ170 568 C~2nw8 2016 01 07.40549 03 13 36.992 +17 35 09.12 25.0w 15VZ170 568 C~2nw8 2016 01 08.25043 03 13 35.051 +17 35 02.57 24.9w 15VZ170 568 C~2nw8 2016 02 05.28189 03 13 05.905 +17 33 46.81 25.0w 15VZ170 568 C~2nw8 2016 02 10.30227 03 13 08.303 +17 34 03.00 25.2w 15VZ170 568 C~2nw8 2016 09 07.57363 03 25 47.075 +18 24 48.66 15VZ170 568 C~2nw8 2016 09 27.51061 03 25 05.827 +18 22 28.41 24.8w 15VZ170 568 C~2nw8 2016 09 29.48481 03 25 00.087 +18 22 08.50 25.0w 15VZ170 568 C~2nw8 2016 10 05.48792 03 24 40.957 +18 21 02.14 24.6w 15VZ170 568 C~2nw8 2016 10 07.49247 03 24 34.050 +18 20 38.00 25.5w 15VZ170 568 C~2nw8 2016 10 07.58817 03 24 33.696 +18 20 36.64 25.0w 15VZ170 568 C~2nw8 2016 10 09.49252 03 24 26.907 +18 20 12.97 25.3w 15VZ170 568 C~2nw8 2016 10 09.56525 03 24 26.644 +18 20 12.14 24.7w 15VZ170 568 C~2nw8 2016 11 02.50259 03 22 46.350 +18 14 19.04 24.9w 15VZ170 568 C~2nw8 2016 11 04.47870 03 22 37.218 +18 13 46.79 25.1w 15VZ170 568 C~2nw8 2016 12 28.44773 03 18 45.849 +18 00 12.32 24.9w 15VZ170 568 C~2nw8 2017 01 26.34230 03 17 48.728 +17 57 10.34 25.1w 15VZ170 568 C~2nw8 2017 01 27.27995 03 17 48.105 +17 57 09.01 25.1w 15VZ170 568 C~2nw8 2017 09 15.56413 03 30 18.652 +18 46 28.79 25.1w 15VZ170 568 C~2nw8 2017 09 20.61305 03 30 08.458 +18 45 56.04 25.0w 15VZ170 568 C~2nw8 2017 12 13.39064 03 24 26.430 +18 26 31.17 24.9w 15VZ170 568 C~2nw8 2017 12 13.42791 03 24 26.279 +18 26 30.64 25.0w 15VZ170 568 C~2nw8
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 -0.06 0.00 0.01
2 0.0133 -106.20 0.12 1.65 -0.09
3 0.0819 -1085.81 0.07 12.94 -0.07
4 0.0821 -1089.14 -0.11 12.87 -0.18
5 0.0875 -1193.58 -0.05 14.15 0.03
6 0.1662 -3002.05 0.01 33.48 0.21
7 0.1663 -3005.02 -0.01 33.45 0.12
8 0.1664 -3008.09 -0.12 33.42 0.05
9 0.1749 -3221.60 0.00 35.92 0.00
10 0.1936 -3698.18 0.04 41.76 -0.01
11 0.1937 -3701.50 0.00 41.76 -0.06
12 0.2457 -4976.69 -0.02 60.36 -0.02
13 0.3168 -6367.50 -0.10 90.60 0.09
14 0.3334 -6596.81 0.11 98.21 0.06
15 0.3357 -6625.34 -0.02 99.22 0.01
16 0.4125 -7047.80 0.11 136.30 0.13
17 0.4262 -7010.40 0.00 142.85 -0.03
18 1.0019 4236.78 0.01 311.86 -0.01
19 1.0565 3633.01 -0.11 321.90 -0.05
20 1.0619 3548.89 0.01 322.96 -0.08
21 1.0783 3268.53 0.11 326.59 0.06
22 1.0838 3167.25 0.13 327.75 0.02
23 1.0841 3162.03 -0.06 327.69 -0.13
24 1.0893 3062.50 -0.00 328.91 -0.05
25 1.0895 3058.66 0.12 329.04 0.02
26 1.1550 1587.14 -0.11 345.66 -0.08
27 1.1604 1453.10 0.02 347.25 -0.04
28 1.3082 -1944.12 -0.03 399.98 -0.13
29 1.3873 -2778.58 -0.07 434.35 0.10
30 1.3899 -2787.51 0.05 435.36 -0.01
31 2.0231 8302.55 0.03 626.72 -0.07
32 2.0369 8153.91 -0.05 629.99 0.11
33 2.2663 3150.43 -0.04 696.86 0.06
34 2.2664 3148.22 0.03 696.89 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.
15VZ170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 44.643 44.668 44.619 ecceobj 0.088 0.090 0.086 incobj 4.179 4.179 4.179 qmin 39.801 39.777 39.909 qmax 48.992 49.137 48.925 amean 44.307 44.327 44.283 amin 43.952 43.978 43.925 amax 44.690 44.715 44.653 emean 0.081 0.083 0.079 emin 0.065 0.067 0.063 emax 0.097 0.100 0.096 imean 2.754 2.747 2.755 imin 2.020 2.012 2.022 imax 3.430 3.430 3.430 excite_mean 0.095 0.096 0.093 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 188.7 188.7 188.6 kozaiamp 180.0 180.0 179.9