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: 15VL172
# Created Tue Apr 1 01:10:42 2025
# Orbit generated from Bernstein formalism
# Fitting 27 observations of 27
# Arc: 2.01y
# First observation: 2015/09/12
# Last observation: 2017/09/15
Preliminary a, adot, b, bdot, g, gdot:
-0.000154 0.027813 0.000002 0.001791 0.026059 0.000000
# Chi-squared of fit: 13.91 DOF: 48 RMS: 0.13
# Min/Max residuals: -0.29 0.35
# Exact a, adot, b, bdot, g, gdot:
1.700450E-05 2.764284E-02 1.088527E-06 1.787576E-03 2.608525E-02 1.067947E-03
# Covariance matrix:
2.7213E-13 -3.1125E-14 -1.8894E-15 9.5342E-15 2.0679E-13 3.2865E-12
-3.1125E-14 4.2967E-13 -5.2592E-15 2.7013E-14 1.9826E-13 9.2890E-12
-1.8894E-15 -5.2592E-15 1.1630E-13 -1.0776E-13 -4.5314E-15 -1.9969E-13
9.5342E-15 2.7013E-14 -1.0776E-13 1.8702E-13 2.3088E-14 1.0252E-12
2.0679E-13 1.9826E-13 -4.5314E-15 2.3088E-14 3.1972E-13 7.9479E-12
3.2865E-12 9.2890E-12 -1.9969E-13 1.0252E-12 7.9479E-12 3.5255E-10
# lat0 lon0 xBary yBary zBary JD0
0.019446 50.560134 0.885658 0.000310 -0.485405 2457278.009839
# Heliocentric elements and errors
Epoch: 2457270.5000 = 2015/09/05
Mean Anomaly: 6.37532 +/- 0.308
Argument of Peri: 352.28077 +/- 0.388
Long of Asc Node: 48.95968 +/- 0.000
Inclination: 3.70285 +/- 0.001
Eccentricity: 0.10946346 +/- 0.0001
Semi-Major Axis: 43.55917439 +/- 0.0037
Time of Perihelion: 2455410.9101 +/- 89.9
Perihelion: 38.79103625 +/- 0.0069
Aphelion: 48.32731253 +/- 0.0073
Period (y) 287.4933 +/- 0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 25.34179021 +/- 0.0005
Ecliptic Y 29.41844092 +/- 0.0006
Ecliptic Z 0.01306409 +/- 0.0000
Ecliptic XDOT -0.00217134 +/- 0.0000
Ecliptic YDOT 0.00192321 +/- 0.0000
Ecliptic ZDOT 0.00018771 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 38.82848398 +/- 0.0006
Geocenter to KBO 38.33583544 +/- 0.0008
# Hcoef: 9.29
The following table shows the complete astrometric record for 15VL172. 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 (15VL172) followed by the observatory code and reference code for the source of the astrometry.
2015 09 12.50905 03 12 27.967 +17 54 33.55 25.3w 15VL172 568 C~2nwD 2015 10 07.43408 03 11 10.455 +17 49 54.57 25.0w 15VL172 568 C~2nwD 2015 10 08.44583 03 11 06.283 +17 49 39.31 25.2w 15VL172 568 C~2nwD 2015 10 08.50488 03 11 06.030 +17 49 38.09 25.1w 15VL172 568 C~2nwD 2015 11 07.35377 03 08 40.804 +17 40 31.43 24.6r 15VL172 568 C~2nwD 2015 11 07.39585 03 08 40.580 +17 40 30.60 24.9r 15VL172 568 C~2nwD 2015 11 07.43803 03 08 40.353 +17 40 29.69 25.2r 15VL172 568 C~2nwD 2015 11 10.52298 03 08 23.918 +17 39 27.08 24.9w 15VL172 568 C~2nwD 2015 11 17.36965 03 07 47.455 +17 37 07.42 25.7w 15VL172 568 C~2nwD 2015 11 17.41626 03 07 47.201 +17 37 06.72 25.4w 15VL172 568 C~2nwD 2015 12 06.37850 03 06 10.872 +17 30 56.32 25.3w 15VL172 568 C~2nwD 2015 12 13.31287 03 05 39.278 +17 28 54.47 25.6w 15VL172 568 C~2nwD 2015 12 13.37141 03 05 39.045 +17 28 53.55 25.7w 15VL172 568 C~2nwD 2016 01 01.36607 03 04 29.272 +17 24 26.68 25.3w 15VL172 568 C~2nwD 2016 01 07.31283 03 04 13.602 +17 23 28.56 25.8w 15VL172 568 C~2nwD 2016 02 04.28927 03 03 47.561 +17 22 08.33 25.1w 15VL172 568 C~2nwD 2016 02 10.27908 03 03 52.824 +17 22 35.24 25.6w 15VL172 568 C~2nwD 2016 09 06.61138 03 18 54.928 +18 25 42.09 25.1w 15VL172 568 C~2nwD 2016 09 26.60062 03 18 08.325 +18 23 09.57 26.2w 15VL172 568 C~2nwD 2016 10 10.40808 03 17 16.475 +18 20 08.37 25.5w 15VL172 568 C~2nwD 2016 10 10.46643 03 17 16.202 +18 20 07.59 25.7w 15VL172 568 C~2nwD 2016 10 27.50259 03 15 56.073 +18 15 19.65 25.4w 15VL172 568 C~2nwD 2016 11 03.52763 03 15 19.638 +18 13 06.80 25.3w 15VL172 568 C~2nwD 2016 12 29.38063 03 10 53.944 +17 56 41.10 26.2w 15VL172 568 C~2nwD 2017 01 02.38784 03 10 41.608 +17 55 55.92 25.1w 15VL172 568 C~2nwD 2017 01 26.27742 03 10 00.108 +17 53 30.08 25.3w 15VL172 568 C~2nwD 2017 09 15.60695 03 24 59.402 +18 54 47.57 25.4w 15VL172 568 C~2nwD
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 -0.05 0.00 -0.00
2 0.0682 -1140.93 0.21 25.89 -0.14
3 0.0710 -1202.41 0.08 27.11 0.01
4 0.0712 -1206.22 -0.05 26.90 -0.29
5 0.1529 -3351.76 -0.11 58.21 -0.02
6 0.1530 -3355.07 -0.06 58.28 -0.02
7 0.1531 -3358.44 -0.06 58.28 -0.08
8 0.1616 -3601.58 -0.10 61.57 0.01
9 0.1803 -4141.35 -0.05 68.49 -0.04
10 0.1804 -4145.03 -0.01 68.81 0.20
11 0.2324 -5572.18 0.03 87.94 0.26
12 0.2513 -6040.62 -0.20 94.57 0.06
13 0.2515 -6044.08 0.19 94.60 0.01
14 0.3035 -7078.48 -0.19 112.61 -0.29
15 0.3198 -7310.39 0.10 118.63 0.11
16 0.3964 -7691.33 0.15 144.56 0.35
17 0.4128 -7611.37 0.14 149.58 0.01
18 0.9859 5813.19 0.01 362.34 -0.08
19 1.0406 5132.52 0.12 385.82 -0.10
20 1.0784 4372.21 0.09 401.73 -0.03
21 1.0786 4368.25 -0.17 401.99 0.13
22 1.1252 3191.06 0.09 420.83 0.03
23 1.1445 2655.20 -0.03 428.29 -0.04
24 1.2974 -1259.33 -0.11 480.65 -0.20
25 1.3084 -1441.05 -0.02 484.26 0.14
26 1.3738 -2050.84 0.02 502.69 0.01
27 2.0099 11275.37 -0.00 741.25 -0.00
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.
15VL172 quality flag:2 Type: CLASSICAL SCATNEAR CLASSICAL axisobj 44.032 44.048 44.017 ecceobj 0.119 0.120 0.118 incobj 3.690 3.690 3.690 qmin 37.386 37.759 36.934 qmax 50.335 50.231 50.728 amean 43.644 43.780 43.625 amin 43.256 43.300 43.247 amax 44.062 44.210 44.048 emean 0.116 0.112 0.125 emin 0.092 0.091 0.101 emax 0.142 0.136 0.152 imean 1.620 1.877 1.671 imin 0.178 0.580 0.112 imax 3.188 3.189 3.187 excite_mean 0.121 0.117 0.130 fracstop 1.000 1.000 1.000 cjmean 3.079 3.082 3.076 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 176.5 190.2 171.6 kozaiamp 180.0 180.0 180.0