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: 15VG170 # Created Mon Apr 28 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 33 observations of 33 # Arc: 2.32y # First observation: 2015/08/20 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000157 0.026815 -0.000001 0.000138 0.025738 0.000000 # Chi-squared of fit: 5.69 DOF: 60 RMS: 0.07 # Min/Max residuals: -0.19 0.18 # Exact a, adot, b, bdot, g, gdot: 1.585882E-05 2.632629E-02 2.457021E-07 1.349615E-04 2.546422E-02 -3.551524E-04 # Covariance matrix: 2.1288E-13 -4.7391E-14 5.5959E-16 1.4105E-16 1.2939E-13 1.0218E-12 -4.7391E-14 3.9801E-13 1.3391E-16 1.5340E-15 1.7823E-13 8.8722E-12 5.5959E-16 1.3391E-16 9.9075E-14 -7.2261E-14 6.4202E-16 5.3599E-15 1.4105E-16 1.5340E-15 -7.2261E-14 9.3134E-14 9.1306E-16 4.4680E-14 1.2939E-13 1.7823E-13 6.4202E-16 9.1306E-16 2.2219E-13 5.4927E-12 1.0218E-12 8.8722E-12 5.3599E-15 4.4680E-14 5.4927E-12 2.5897E-10 # lat0 lon0 xBary yBary zBary JD0 -0.419624 53.369948 1.012371 -0.000357 -0.067084 2457255.076589 # Heliocentric elements and errors Epoch: 2457250.5000 = 2015/08/16 Mean Anomaly: 329.52826 +/- 0.345 Argument of Peri: 339.37628 +/- 0.420 Long of Asc Node: 107.79005 +/- 0.061 Inclination: 0.50576 +/- 0.000 Eccentricity: 0.07616355 +/- 0.0003 Semi-Major Axis: 42.03902431 +/- 0.0031 Time of Perihelion: 2465677.4819 +/- 95.4 Perihelion: 38.83718280 +/- 0.0149 Aphelion: 45.24086582 +/- 0.0150 Period (y) 272.5757 +/- 0.03 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 24.27854121 +/- 0.0004 Ecliptic Y 30.96380175 +/- 0.0006 Ecliptic Z -0.28757883 +/- 0.0000 Ecliptic XDOT -0.00229623 +/- 0.0000 Ecliptic YDOT 0.00165190 +/- 0.0000 Ecliptic ZDOT 0.00001485 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 39.34828184 +/- 0.0005 Geocenter to KBO 39.27078198 +/- 0.0007 # Hcoef: 8.12
The following table shows the complete astrometric record for 15VG170. 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 (15VG170) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.57580 03 24 21.869 +18 12 33.68 24.2w 15VG170 568 C~2nw5 2015 10 07.52101 03 22 56.446 +18 06 53.83 24.3w 15VG170 568 C~2nw5 2015 10 07.58040 03 22 56.214 +18 06 52.89 24.4w 15VG170 568 C~2nw5 2015 10 09.56029 03 22 48.415 +18 06 23.34 24.3w 15VG170 568 C~2nw5 2015 11 06.33360 03 20 36.995 +17 58 07.00 23.9r 15VG170 568 C~2nw5 2015 11 06.39716 03 20 36.640 +17 58 05.85 24.0r 15VG170 568 C~2nw5 2015 11 06.40423 03 20 36.609 +17 58 05.55 24.0r 15VG170 568 C~2nw5 2015 11 06.47375 03 20 36.251 +17 58 04.18 24.5r 15VG170 568 C~2nw5 2015 11 07.49015 03 20 30.919 +17 57 44.21 24.0w 15VG170 568 C~2nw5 2015 11 17.47136 03 19 38.097 +17 54 25.56 24.0w 15VG170 568 C~2nw5 2015 11 17.55969 03 19 37.616 +17 54 23.74 24.5w 15VG170 568 C~2nw5 2015 12 06.33759 03 18 01.283 +17 48 22.03 24.2w 15VG170 568 C~2nw5 2015 12 06.47504 03 18 00.598 +17 48 19.63 24.3w 15VG170 568 C~2nw5 2015 12 31.35875 03 16 18.140 +17 41 58.26 24.2w 15VG170 568 C~2nw5 2016 01 07.38812 03 15 57.555 +17 40 43.39 24.4w 15VG170 568 C~2nw5 2016 01 07.42286 03 15 57.463 +17 40 42.93 24.5w 15VG170 568 C~2nw5 2016 01 08.24465 03 15 55.369 +17 40 35.40 24.2w 15VG170 568 C~2nw5 2016 02 04.37827 03 15 23.423 +17 38 51.37 24.1w 15VG170 568 C~2nw5 2016 02 11.24103 03 15 27.645 +17 39 12.91 24.6w 15VG170 568 C~2nw5 2016 09 07.59099 03 30 26.455 +18 34 47.79 24.4w 15VG170 568 C~2nw5 2016 09 27.52301 03 29 43.625 +18 32 05.94 24.2w 15VG170 568 C~2nw5 2016 10 05.50531 03 29 16.654 +18 30 26.59 24.2w 15VG170 568 C~2nw5 2016 10 07.50982 03 29 09.101 +18 29 59.03 24.4w 15VG170 568 C~2nw5 2016 10 07.60551 03 29 08.736 +18 29 57.67 24.2w 15VG170 568 C~2nw5 2016 10 09.51019 03 29 01.300 +18 29 30.49 24.4w 15VG170 568 C~2nw5 2016 10 09.58259 03 29 01.001 +18 29 29.27 24.3w 15VG170 568 C~2nw5 2016 11 02.47946 03 27 09.890 +18 22 45.26 24.5w 15VG170 568 C~2nw5 2016 12 28.44773 03 22 37.971 +18 06 23.47 24.2w 15VG170 568 C~2nw5 2017 01 27.31434 03 21 32.565 +18 02 39.63 23.9w 15VG170 568 C~2nw5 2017 09 15.55809 03 36 29.234 +18 56 13.06 24.5w 15VG170 568 C~2nw5 2017 09 20.60688 03 36 18.856 +18 55 35.29 24.2w 15VG170 568 C~2nw5 2017 12 13.36234 03 29 57.706 +18 33 22.97 24.2w 15VG170 568 C~2nw5 2017 12 13.40466 03 29 57.496 +18 33 22.38 24.4w 15VG170 568 C~2nw5
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 0.10 0.00 -0.03
2 0.1313 -1263.84 0.01 -23.66 0.03
3 0.1314 -1267.28 0.04 -23.74 -0.04
4 0.1369 -1382.33 0.08 -24.34 0.03
5 0.2129 -3321.61 0.06 -29.65 -0.05
6 0.2131 -3326.80 -0.15 -29.47 0.10
7 0.2131 -3327.31 -0.10 -29.65 -0.08
8 0.2133 -3332.60 0.06 -29.67 -0.12
9 0.2161 -3411.28 0.02 -29.59 -0.03
10 0.2434 -4191.11 0.08 -29.08 0.05
11 0.2436 -4198.21 -0.01 -29.08 0.03
12 0.2950 -5621.17 0.00 -25.04 0.05
13 0.2954 -5631.25 -0.06 -24.84 0.18
14 0.3635 -7145.22 0.09 -13.73 -0.05
15 0.3828 -7449.12 -0.04 -9.36 0.10
16 0.3829 -7450.51 -0.06 -9.46 -0.02
17 0.3851 -7481.41 0.02 -8.93 0.03
18 0.4594 -7949.99 -0.17 9.91 0.02
19 0.4782 -7886.01 0.11 14.93 -0.00
20 1.0514 5359.26 0.09 17.61 0.02
21 1.1059 4728.77 0.03 8.10 0.00
22 1.1278 4332.33 -0.10 4.94 -0.11
23 1.1333 4221.36 -0.19 4.36 -0.01
24 1.1336 4215.99 -0.03 4.30 -0.06
25 1.1388 4106.74 0.03 3.70 -0.02
26 1.1390 4102.31 -0.06 3.56 -0.16
27 1.2044 2469.96 0.00 -0.95 0.01
28 1.3576 -1526.40 -0.03 13.31 -0.03
29 1.4394 -2485.46 0.09 32.56 0.08
30 2.0725 10678.02 0.00 41.69 0.04
31 2.0863 10525.62 -0.01 39.36 0.03
32 2.3156 4941.84 0.09 34.27 -0.04
33 2.3158 4938.80 0.01 34.42 0.08
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.
15VG170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 42.436 42.445 42.428 ecceobj 0.081 0.081 0.081 incobj 0.506 0.506 0.506 qmin 37.319 37.531 37.120 qmax 47.183 47.038 47.383 amean 42.117 42.126 42.108 amin 41.758 41.764 41.754 amax 42.486 42.495 42.467 emean 0.084 0.081 0.087 emin 0.051 0.048 0.054 emax 0.111 0.107 0.116 imean 2.591 2.463 2.754 imin 0.736 0.501 0.943 imax 4.050 4.000 4.100 excite_mean 0.097 0.093 0.100 fracstop 1.000 1.000 1.000 cjmean 3.068 3.069 3.067 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 172.5 180.9 174.8 kozaiamp 179.9 180.0 180.0