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: 15VY170
# Created Mon Apr 28 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting 32 observations of 32
# Arc: 2.04y
# First observation: 2015/09/07
# Last observation: 2017/09/20
Preliminary a, adot, b, bdot, g, gdot:
-0.000111 0.023176 0.000001 0.000705 0.023752 0.000000
# Chi-squared of fit: 4.19 DOF: 58 RMS: 0.06
# Min/Max residuals: -0.18 0.15
# Exact a, adot, b, bdot, g, gdot:
1.596189E-05 2.298629E-02 1.382566E-07 7.017522E-04 2.371159E-02 8.301000E-04
# Covariance matrix:
2.1841E-13 -8.3004E-14 -5.8998E-16 1.7232E-15 1.3897E-13 1.3627E-12
-8.3004E-14 3.7543E-13 -2.4954E-15 1.0765E-14 1.3067E-13 8.6057E-12
-5.8998E-16 -2.4954E-15 1.0537E-13 -9.0910E-14 -1.9752E-15 -9.4973E-14
1.7232E-15 1.0765E-14 -9.0910E-14 1.3759E-13 7.5394E-15 4.0183E-13
1.3897E-13 1.3067E-13 -1.9752E-15 7.5394E-15 2.3248E-13 6.0093E-12
1.3627E-12 8.6057E-12 -9.4973E-14 4.0183E-13 6.0093E-12 3.2108E-10
# lat0 lon0 xBary yBary zBary JD0
0.232380 52.596703 0.937685 0.001682 -0.378110 2457273.129809
# Heliocentric elements and errors
Epoch: 2457270.5000 = 2015/09/05
Mean Anomaly: 40.73588 +/- 1.722
Argument of Peri: 325.36846 +/- 1.809
Long of Asc Node: 43.87009 +/- 0.004
Inclination: 1.77122 +/- 0.001
Eccentricity: 0.01785659 +/- 0.0006
Semi-Major Axis: 43.13676063 +/- 0.0037
Time of Perihelion: 2445560.8379 +/- 495.0
Perihelion: 42.36648512 +/- 0.0243
Aphelion: 43.90703614 +/- 0.0243
Period (y) 283.3215 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 26.58730424 +/- 0.0005
Ecliptic Y 33.23203841 +/- 0.0007
Ecliptic Z 0.17105988 +/- 0.0000
Ecliptic XDOT -0.00205221 +/- 0.0000
Ecliptic YDOT 0.00168162 +/- 0.0000
Ecliptic ZDOT 0.00008147 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.55916335 +/- 0.0006
Geocenter to KBO 42.17346463 +/- 0.0009
# Hcoef: 7.46
The following table shows the complete astrometric record for 15VY170. 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 (15VY170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62902 03 20 30.961 +18 38 42.22 23.6w 15VY170 568 C~2nw7 2015 09 12.49264 03 20 23.485 +18 38 17.61 24.1w 15VY170 568 C~2nw7 2015 10 07.53854 03 19 13.837 +18 34 12.78 24.0w 15VY170 568 C~2nw7 2015 10 07.59790 03 19 13.606 +18 34 11.94 24.1w 15VY170 568 C~2nw7 2015 10 09.57780 03 19 06.155 +18 33 45.09 24.0w 15VY170 568 C~2nw7 2015 11 07.33264 03 16 57.148 +18 25 50.25 23.7r 15VY170 568 C~2nw7 2015 11 07.37479 03 16 56.937 +18 25 49.46 23.6r 15VY170 568 C~2nw7 2015 11 07.41697 03 16 56.725 +18 25 48.75 23.8r 15VY170 568 C~2nw7 2015 11 10.49950 03 16 41.481 +18 24 51.73 23.9w 15VY170 568 C~2nw7 2015 11 17.34635 03 16 07.512 +18 22 44.07 23.9w 15VY170 568 C~2nw7 2015 11 17.39294 03 16 07.280 +18 22 43.24 23.8w 15VY170 568 C~2nw7 2015 12 06.35508 03 14 36.529 +18 16 59.00 23.9w 15VY170 568 C~2nw7 2015 12 06.49265 03 14 35.901 +18 16 56.62 24.0w 15VY170 568 C~2nw7 2016 01 01.34294 03 12 58.009 +18 10 40.01 24.1w 15VY170 568 C~2nw7 2016 01 07.40549 03 12 41.854 +18 09 37.46 24.2w 15VY170 568 C~2nw7 2016 01 08.25043 03 12 39.868 +18 09 29.66 24.0w 15VY170 568 C~2nw7 2016 02 05.28189 03 12 10.943 +18 07 37.50 24.2w 15VY170 568 C~2nw7 2016 02 10.30227 03 12 13.866 +18 07 49.12 24.1w 15VY170 568 C~2nw7 2016 09 07.57363 03 25 50.129 +19 00 49.13 15VY170 568 C~2nw7 2016 09 27.51061 03 25 07.375 +18 58 28.83 24.0w 15VY170 568 C~2nw7 2016 09 29.48481 03 25 01.382 +18 58 08.32 23.8w 15VY170 568 C~2nw7 2016 10 05.48792 03 24 41.356 +18 56 59.59 24.1w 15VY170 568 C~2nw7 2016 10 07.49247 03 24 34.110 +18 56 34.38 23.2w 15VY170 568 C~2nw7 2016 10 07.58817 03 24 33.735 +18 56 33.25 24.1w 15VY170 568 C~2nw7 2016 10 09.49252 03 24 26.625 +18 56 08.48 23.8w 15VY170 568 C~2nw7 2016 10 09.56525 03 24 26.348 +18 56 07.49 24.1w 15VY170 568 C~2nw7 2016 11 02.50259 03 22 40.959 +18 49 53.96 23.9w 15VY170 568 C~2nw7 2016 11 04.47870 03 22 31.341 +18 49 19.33 24.0w 15VY170 568 C~2nw7 2016 12 28.43500 03 18 28.238 +18 34 23.80 15VY170 568 C~2nw7 2017 01 27.27995 03 17 28.550 +18 30 37.60 24.1w 15VY170 568 C~2nw7 2017 09 15.56413 03 30 59.283 +19 21 47.23 24.1w 15VY170 568 C~2nw7 2017 09 20.61305 03 30 48.787 +19 21 14.56 23.9w 15VY170 568 C~2nw7
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 -0.13 0.00 0.07
2 0.0133 -109.02 0.08 3.31 -0.03
3 0.0819 -1128.84 0.02 20.06 -0.01
4 0.0821 -1132.23 -0.08 20.09 -0.03
5 0.0875 -1241.53 -0.08 21.35 0.01
6 0.1662 -3137.27 0.09 36.73 0.06
7 0.1663 -3140.37 0.08 36.75 0.04
8 0.1664 -3143.47 0.09 36.84 0.10
9 0.1749 -3367.83 -0.06 38.18 0.04
10 0.1936 -3868.05 -0.03 40.88 -0.02
11 0.1937 -3871.45 0.02 40.94 0.00
12 0.2457 -5209.35 0.03 47.13 0.01
13 0.2460 -5218.61 0.07 47.18 0.00
14 0.3168 -6664.44 -0.05 52.10 -0.01
15 0.3334 -6903.28 -0.11 52.86 0.05
16 0.3357 -6932.68 -0.03 52.85 -0.01
17 0.4125 -7360.47 -0.05 54.30 -0.11
18 0.4262 -7317.16 0.11 54.42 -0.12
19 1.0019 4720.17 0.00 145.20 0.00
20 1.0565 4097.64 -0.02 159.82 -0.03
21 1.0619 4010.17 0.15 161.10 -0.11
22 1.0783 3717.81 0.11 165.30 -0.00
23 1.0838 3611.93 -0.01 166.53 -0.10
24 1.0841 3606.50 -0.18 166.76 0.05
25 1.0893 3502.60 -0.04 167.95 0.03
26 1.0895 3498.55 0.04 167.97 -0.01
27 1.1550 1956.64 0.00 181.62 0.02
28 1.1604 1815.76 -0.00 182.54 0.00
29 1.3082 -1752.59 -0.01 197.50 0.01
30 1.3899 -2631.15 -0.01 198.35 -0.01
31 2.0231 9279.89 -0.02 295.96 0.03
32 2.0369 9127.55 -0.00 300.00 0.07
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.
15VY170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 43.556 43.569 43.542 ecceobj 0.028 0.029 0.027 incobj 1.764 1.764 1.764 qmin 41.192 41.203 41.180 qmax 45.437 45.439 45.393 amean 43.226 43.239 43.213 amin 42.897 42.913 42.879 amax 43.561 43.572 43.548 emean 0.027 0.028 0.027 emin 0.006 0.007 0.005 emax 0.044 0.044 0.043 imean 1.243 1.242 1.244 imin 0.226 0.229 0.225 imax 2.000 1.997 2.000 excite_mean 0.036 0.037 0.036 fracstop 1.000 1.000 1.000 cjmean 3.091 3.091 3.091 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 182.9 182.0 183.1 kozaiamp 180.0 180.0 179.9