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: 15VT164 # Created Fri Nov 22 02:10:31 2024 # Orbit generated from Bernstein formalism # Fitting 25 observations of 26 # Arc: 1.44y # First observation: 2015/08/20 # Last observation: 2017/01/27 Preliminary a, adot, b, bdot, g, gdot: -0.000185 0.030553 -0.000004 0.003483 0.028612 0.000000 # Chi-squared of fit: 11.48 DOF: 44 RMS: 0.12 # Min/Max residuals: -0.53 0.20 # Exact a, adot, b, bdot, g, gdot: 1.675414E-05 3.003385E-02 1.474963E-06 3.449611E-03 2.832357E-02 8.453946E-03 # Covariance matrix: 3.3676E-13 1.5482E-13 2.9837E-16 5.7328E-14 3.9016E-13 1.4465E-11 1.5482E-13 9.8197E-13 -9.9062E-15 1.5504E-13 7.3679E-13 3.9128E-11 2.9837E-16 -9.9062E-15 1.3207E-13 -1.3971E-13 -5.4006E-15 -5.9017E-13 5.7328E-14 1.5504E-13 -1.3971E-13 2.8584E-13 1.5146E-13 8.3835E-12 3.9016E-13 7.3679E-13 -5.4006E-15 1.5146E-13 8.4686E-13 3.8221E-11 1.4465E-11 3.9128E-11 -5.9017E-13 8.3835E-12 3.8221E-11 2.1158E-09 # lat0 lon0 xBary yBary zBary JD0 -2.886368 54.093507 1.013154 -0.002591 -0.054020 2457255.064109 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 54.01351 +/- 0.095 Argument of Peri: 253.46493 +/- 0.036 Long of Asc Node: 76.52592 +/- 0.003 Inclination: 7.03371 +/- 0.001 Eccentricity: 0.25824438 +/- 0.0016 Semi-Major Axis: 39.21067087 +/- 0.0348 Time of Perihelion: 2443794.8491 +/- 15.4 Perihelion: 29.08473538 +/- 0.0661 Aphelion: 49.33660635 +/- 0.0749 Period (y) 245.5357 +/- 0.33 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 21.52792929 +/- 0.0007 Ecliptic Y 28.01039001 +/- 0.0009 Ecliptic Z -1.77778461 +/- 0.0001 Ecliptic XDOT -0.00186500 +/- 0.0000 Ecliptic YDOT 0.00237090 +/- 0.0000 Ecliptic ZDOT 0.00029193 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 35.37222365 +/- 0.0008 Geocenter to KBO 35.30628145 +/- 0.0011 # Hcoef: 9.22
The following table shows the complete astrometric record for 15VT164. 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 (15VT164) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.56332 03 29 50.419 +15 59 47.86 25.3w 15VT164 568 C~2lVY 2015 09 07.60859 03 29 46.004 +15 58 37.12 24.9w 15VT164 568 C~2lVY 2015 09 12.45964 03 29 38.675 +15 57 56.79 25.1w 15VT164 568 C~2lVY 2015 10 07.50935 03 28 22.860 +15 52 29.43 23.4w 15VT164 568 C~2lVY 2015 10 07.56783 03 28 22.576 +15 52 28.52 24.9w 15VT164 568 C~2lVY 2015 10 09.54866 03 28 14.171 +15 51 55.28 24.9w 15VT164 568 C~2lVY 2015 11 06.32308 03 25 51.033 +15 43 08.36 24.5r 15VT164 568 C~2lVY 2015 11 06.38643 03 25 50.671 +15 43 07.02 24.9r 15VT164 568 C~2lVY 2015 11 06.45719 03 25 50.235 +15 43 05.71 24.9r 15VT164 568 C~2lVY 2015 11 07.47849 03 25 44.377 +15 42 45.23 24.9w 15VT164 568 C~2lVY 2015 11 17.45967 03 24 46.250 +15 39 27.47 25.0w 15VT164 568 C~2lVY 2015 11 17.54796 03 24 45.731 +15 39 25.61 24.3w 15VT164 568 C~2lVY 2015 12 06.32589 03 22 59.095 +15 33 46.06 24.9w 15VT164 568 C~2lVY 2015 12 06.45961 03 22 58.348 +15 33 43.99 25.1w 15VT164 568 C~2lVY 2015 12 31.34718 03 21 03.667 +15 28 35.96 24.8w 15VT164 568 C~2lVY 2016 01 07.37652 03 20 40.339 +15 27 49.50 25.0w 15VT164 568 C~2lVY 2016 01 08.23883 03 20 37.812 +15 27 45.81 25.4w 15VT164 568 C~2lVY 2016 02 11.27580 03 20 03.323 +15 29 27.91 25.0w 15VT164 568 C~2lVY 2016 09 25.61718 03 35 52.648 +16 31 48.97 25.0w 15VT164 568 C~2lVY 2016 10 10.55675 03 34 57.259 +16 28 15.03 25.1w 15VT164 568 C~2lVY 2016 10 10.60523 03 34 57.043 +16 28 14.22 24.9w 15VT164 568 C~2lVY 2016 10 28.47637 03 33 29.094 +16 23 00.91 25.1w 15VT164 568 C~2lVY 2016 10 29.53828 03 33 23.322 +16 22 41.13 24.8w 15VT164 568 C~2lVY 2016 11 02.59127 03 33 00.848 +16 21 24.59 25.0w 15VT164 568 C~2lVY 2016 12 24.35153 03 28 18.848 +16 07 13.63 25.5w 15VT164 568 C~2lVY 2017 01 27.33320 03 26 46.490 +16 04 59.71 25.2w 15VT164 568 C~2lVY
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 0.00 0.00 0.09
2 0.0494 -78.93 -0.09 -53.17 0.09
3 0.0627 -191.25 0.00 -66.63 -0.19
4 0.1313 -1331.68 ( 0.56) -117.68 ( -0.10)
5 0.1314 -1335.87 0.09 -117.56 0.08
6 0.1369 -1461.60 0.09 -120.14 -0.03
7 0.2129 -3594.10 0.04 -122.81 0.04
8 0.2131 -3599.49 0.11 -122.82 -0.07
9 0.2133 -3605.92 -0.18 -122.53 0.11
10 0.2161 -3692.97 0.04 -121.45 0.01
11 0.2434 -4555.57 -0.08 -104.88 0.11
12 0.2436 -4563.30 -0.04 -104.82 -0.03
13 0.2950 -6140.91 0.01 -49.17 -0.05
14 0.2954 -6151.88 -0.15 -48.47 0.10
15 0.3635 -7835.50 0.04 70.61 0.20
16 0.3828 -8174.03 0.06 111.01 -0.53
17 0.3851 -8210.37 0.06 116.70 -0.03
18 0.4783 -8667.53 -0.01 342.08 0.05
19 1.1008 5525.37 0.10 618.28 0.10
20 1.1417 4700.25 0.08 598.41 -0.08
21 1.1418 4697.04 0.06 598.36 -0.10
22 1.1907 3392.94 -0.07 594.51 -0.02
23 1.1936 3307.53 0.06 595.10 0.02
24 1.2047 2975.09 -0.32 597.98 -0.00
25 1.3464 -1171.66 0.09 753.86 0.07
26 1.4395 -2494.97 -0.00 950.66 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.
15VT164 quality flag:3 Type: 3:2E 3:2E 3:2E axisobj 39.667 39.776 39.560 ecceobj 0.265 0.269 0.262 incobj 7.025 7.025 7.025 qmin 28.674 28.382 28.658 qmax 50.925 50.975 51.079 amean 39.455 39.455 39.456 amin 38.985 39.063 38.900 amax 40.011 39.908 40.110 emean 0.228 0.250 0.258 emin 0.192 0.205 0.243 emax 0.273 0.279 0.275 imean 8.830 7.114 5.693 imin 5.623 4.691 5.265 imax 10.995 10.839 6.270 excite_mean 0.277 0.281 0.277 fracstop 1.000 1.000 1.000 cjmean 2.964 2.961 2.964 libcent 0 180.3 180.4 178.8 libamp 0 85.7 43.3 122.8 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 224.8 272.4 172.9 kozaiamp 179.9 56.0 179.9