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: 15VW169 # Created Fri Nov 22 02:10:35 2024 # Orbit generated from Bernstein formalism # Fitting 30 observations of 30 # Arc: 2.32y # First observation: 2015/08/20 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000050 0.016292 0.000007 -0.005275 0.020349 0.000000 # Chi-squared of fit: 3.82 DOF: 54 RMS: 0.06 # Min/Max residuals: -0.13 0.19 # Exact a, adot, b, bdot, g, gdot: 1.299535E-05 1.603183E-02 -4.278760E-06 -5.175904E-03 2.011002E-02 -2.250994E-03 # Covariance matrix: 1.7412E-13 -9.9028E-15 7.2707E-15 -2.8370E-14 1.3234E-13 2.5345E-12 -9.9028E-15 2.6677E-13 2.6408E-14 -1.0804E-13 1.8390E-13 9.5465E-12 7.2707E-15 2.6408E-14 1.0103E-13 -8.2926E-14 2.5943E-14 1.4352E-12 -2.8370E-14 -1.0804E-13 -8.2926E-14 1.5640E-13 -1.0442E-13 -5.8841E-12 1.3234E-13 1.8390E-13 2.5943E-14 -1.0442E-13 2.8251E-13 9.2615E-12 2.5345E-12 9.5465E-12 1.4352E-12 -5.8841E-12 9.2615E-12 5.1967E-10 # lat0 lon0 xBary yBary zBary JD0 -0.295339 54.432150 1.013477 -0.000115 -0.047771 2457255.045359 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 245.68821 +/- 0.266 Argument of Peri: 312.48605 +/- 0.238 Long of Asc Node: 232.35898 +/- 0.000 Inclination: 17.96898 +/- 0.001 Eccentricity: 0.18331833 +/- 0.0009 Semi-Major Axis: 45.25221853 +/- 0.0148 Time of Perihelion: 2492556.3570 +/- 80.2 Perihelion: 36.95665734 +/- 0.0434 Aphelion: 53.54777971 +/- 0.0452 Period (y) 304.4164 +/- 0.15 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 29.77194338 +/- 0.0008 Ecliptic Y 39.89752385 +/- 0.0011 Ecliptic Z -0.25650902 +/- 0.0000 Ecliptic XDOT -0.00195777 +/- 0.0000 Ecliptic YDOT 0.00101096 +/- 0.0000 Ecliptic ZDOT -0.00070302 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 49.78199292 +/- 0.0010 Geocenter to KBO 49.72645056 +/- 0.0013 # Hcoef: 7.21
The following table shows the complete astrometric record for 15VW169. 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 (15VW169) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.54457 03 28 34.442 +18 35 31.69 24.4w 15VW169 568 C~2nw3 2015 08 20.55007 03 28 34.449 +18 35 31.64 24.3w 15VW169 568 C~2nw3 2015 09 07.60044 03 28 28.473 +18 34 08.89 24.7w 15VW169 568 C~2nw3 2015 09 12.44733 03 28 22.472 +18 33 30.96 24.3w 15VW169 568 C~2nw3 2015 10 07.49766 03 27 24.296 +18 28 37.11 24.6w 15VW169 568 C~2nw3 2015 10 07.55607 03 27 24.107 +18 28 36.24 24.4w 15VW169 568 C~2nw3 2015 10 09.53675 03 27 17.796 +18 28 06.93 24.4w 15VW169 568 C~2nw3 2015 11 06.31257 03 25 31.369 +18 20 10.29 24.2r 15VW169 568 C~2nw3 2015 11 06.37589 03 25 31.112 +18 20 09.11 24.6r 15VW169 568 C~2nw3 2015 11 06.44667 03 25 30.797 +18 20 07.76 24.2r 15VW169 568 C~2nw3 2015 11 07.46686 03 25 26.459 +18 19 48.85 24.3w 15VW169 568 C~2nw3 2015 11 17.44798 03 24 43.460 +18 16 40.56 24.3w 15VW169 568 C~2nw3 2015 11 17.49527 03 24 43.260 +18 16 39.57 24.2w 15VW169 568 C~2nw3 2015 12 06.31417 03 23 24.024 +18 10 51.75 24.2w 15VW169 568 C~2nw3 2015 12 31.33561 03 21 57.429 +18 04 20.46 24.4w 15VW169 568 C~2nw3 2016 01 07.36493 03 21 39.529 +18 02 55.18 24.7w 15VW169 568 C~2nw3 2016 01 07.41708 03 21 39.408 +18 02 54.42 24.6w 15VW169 568 C~2nw3 2016 02 11.26421 03 21 07.244 +17 59 25.99 24.4w 15VW169 568 C~2nw3 2016 09 07.61412 03 32 33.185 +18 30 02.45 15VW169 568 C~2nw3 2016 09 27.53935 03 31 57.460 +18 26 42.82 24.5w 15VW169 568 C~2nw3 2016 10 09.53365 03 31 22.811 +18 23 57.46 24.4w 15VW169 568 C~2nw3 2016 10 09.60571 03 31 22.570 +18 23 56.32 23.1w 15VW169 568 C~2nw3 2016 11 02.47946 03 29 52.379 +18 17 14.66 24.4w 15VW169 568 C~2nw3 2016 11 04.45547 03 29 44.073 +18 16 38.63 24.5w 15VW169 568 C~2nw3 2016 12 24.34518 03 26 22.165 +18 02 08.35 24.5w 15VW169 568 C~2nw3 2017 01 27.31949 03 25 11.745 +17 56 33.46 24.1w 15VW169 568 C~2nw3 2017 09 16.60340 03 36 28.099 +18 24 24.68 15VW169 568 C~2nw3 2017 09 23.54254 03 36 14.894 +18 23 11.35 15VW169 568 C~2nw3 2017 12 13.37172 03 31 09.502 +18 00 57.54 24.0w 15VW169 568 C~2nw3 2017 12 13.40930 03 31 09.341 +18 00 56.98 24.9w 15VW169 568 C~2nw3
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 -0.08 0.00 0.04
2 0.0000 0.08 -0.02 -0.07 -0.01
3 0.0494 -102.52 -0.06 -59.57 -0.04
4 0.0627 -194.53 0.19 -75.50 0.07
5 0.1313 -1068.78 -0.02 -157.64 -0.03
6 0.1314 -1071.60 -0.05 -157.82 -0.04
7 0.1369 -1165.84 -0.03 -164.17 0.02
8 0.2129 -2751.55 -0.13 -251.88 -0.02
9 0.2131 -2755.39 0.08 -252.11 -0.08
10 0.2133 -2760.07 -0.05 -252.31 -0.09
11 0.2161 -2824.61 0.05 -255.29 0.04
12 0.2434 -3464.70 -0.01 -285.33 0.09
13 0.2435 -3467.71 0.08 -285.57 -0.02
14 0.2951 -4648.18 0.02 -339.98 0.06
15 0.3636 -5942.26 0.03 -407.67 -0.03
16 0.3828 -6211.04 -0.04 -425.57 0.13
17 0.3830 -6212.90 -0.06 -425.87 -0.04
18 0.4784 -6710.06 0.08 -511.17 -0.01
19 1.0515 3215.53 -0.01 -1139.31 -0.03
20 1.1061 2674.15 0.12 -1211.57 -0.02
21 1.1389 2155.70 -0.01 -1253.77 0.07
22 1.1391 2152.10 -0.05 -1254.05 0.03
23 1.2045 808.89 -0.02 -1333.87 -0.02
24 1.2099 685.38 0.04 -1340.14 -0.00
25 1.3465 -2318.09 0.03 -1479.48 -0.12
26 1.4395 -3374.64 -0.04 -1555.01 0.03
27 2.0755 6385.77 0.06 -2257.48 -0.08
28 2.0945 6185.69 -0.05 -2284.85 -0.01
29 2.3157 1639.73 0.08 -2547.72 0.01
30 2.3159 1637.36 -0.11 -2547.71 0.10
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.
15VW169 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 45.565 45.604 45.528 ecceobj 0.175 0.177 0.172 incobj 17.882 17.883 17.882 qmin 36.388 36.297 36.427 qmax 54.647 54.807 54.558 amean 45.312 45.350 45.305 amin 44.896 44.973 44.906 amax 45.759 45.788 45.752 emean 0.179 0.182 0.177 emin 0.164 0.167 0.162 emax 0.195 0.198 0.193 imean 19.143 19.136 19.131 imin 18.639 18.606 18.597 imax 19.674 19.688 19.690 excite_mean 0.373 0.375 0.373 fracstop 1.000 1.000 1.000 cjmean 2.945 2.944 2.946 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 172.6 172.5 172.4 kozaiamp 179.9 180.0 180.0