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: 15VP170 # Created Mon Apr 28 01:10:42 2025 # Orbit generated from Bernstein formalism # Fitting 31 observations of 31 # Arc: 2.27y # First observation: 2015/09/07 # Last observation: 2017/12/13 Preliminary a, adot, b, bdot, g, gdot: -0.000081 0.022985 -0.000007 0.002106 0.023410 0.000000 # Chi-squared of fit: 6.19 DOF: 56 RMS: 0.08 # Min/Max residuals: -0.22 0.20 # Exact a, adot, b, bdot, g, gdot: 1.593013E-05 2.273564E-02 1.408626E-06 2.079026E-03 2.330470E-02 -2.116580E-03 # Covariance matrix: 2.0871E-13 5.9891E-15 -9.7967E-16 1.7122E-14 1.7658E-13 5.5073E-12 5.9891E-15 4.5974E-13 -8.9242E-15 5.8131E-14 2.9489E-13 1.8550E-11 -9.7967E-16 -8.9242E-15 1.1088E-13 -9.8908E-14 -5.9918E-15 -5.4889E-13 1.7122E-14 5.8131E-14 -9.8908E-14 1.5822E-13 5.2305E-14 3.4716E-12 1.7658E-13 2.9489E-13 -5.9918E-15 5.2305E-14 3.7623E-13 1.6745E-11 5.5073E-12 1.8550E-11 -5.4889E-13 3.4716E-12 1.6745E-11 1.1074E-09 # lat0 lon0 xBary yBary zBary JD0 -2.918588 52.583703 0.937628 -0.019112 -0.377779 2457273.125689 # Heliocentric elements and errors Epoch: 2457270.5000 = 2015/09/05 Mean Anomaly: 304.06803 +/- 0.122 Argument of Peri: 40.16980 +/- 0.258 Long of Asc Node: 80.46763 +/- 0.004 Inclination: 5.92723 +/- 0.001 Eccentricity: 0.13049691 +/- 0.0014 Semi-Major Axis: 46.06520221 +/- 0.0164 Time of Perihelion: 2475013.0289 +/- 37.5 Perihelion: 40.05383569 +/- 0.0667 Aphelion: 52.07656872 +/- 0.0677 Period (y) 312.6567 +/- 0.17 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 27.00867262 +/- 0.0007 Ecliptic Y 33.76706255 +/- 0.0009 Ecliptic Z -2.18476801 +/- 0.0001 Ecliptic XDOT -0.00226662 +/- 0.0000 Ecliptic YDOT 0.00142912 +/- 0.0000 Ecliptic ZDOT 0.00025664 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 43.29498956 +/- 0.0008 Geocenter to KBO 42.90979962 +/- 0.0011 # Hcoef: 8.11
The following table shows the complete astrometric record for 15VP170. 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 (15VP170) followed by the observatory code and reference code for the source of the astrometry.
2015 09 07.62490 03 23 47.948 +15 35 35.64 24.6w 15VP170 568 C~2nw6 2015 09 12.48855 03 23 41.004 +15 34 56.49 24.9w 15VP170 568 C~2nw6 2015 10 07.53269 03 22 34.904 +15 29 55.12 24.6w 15VP170 568 C~2nw6 2015 10 07.59208 03 22 34.687 +15 29 54.22 25.0w 15VP170 568 C~2nw6 2015 10 09.57195 03 22 27.554 +15 29 24.49 24.5w 15VP170 568 C~2nw6 2015 11 06.34408 03 20 27.887 +15 21 38.63 24.3r 15VP170 568 C~2nw6 2015 11 06.41470 03 20 27.550 +15 21 37.43 24.1r 15VP170 568 C~2nw6 2015 11 06.48426 03 20 27.220 +15 21 36.24 24.9r 15VP170 568 C~2nw6 2015 11 07.50182 03 20 22.371 +15 21 18.56 24.4w 15VP170 568 C~2nw6 2015 11 17.48361 03 19 34.379 +15 18 25.77 24.8w 15VP170 568 C~2nw6 2015 11 17.57138 03 19 33.963 +15 18 24.39 24.5w 15VP170 568 C~2nw6 2015 12 06.34926 03 18 06.376 +15 13 28.87 24.4w 15VP170 568 C~2nw6 2015 12 06.48675 03 18 05.778 +15 13 26.84 24.9w 15VP170 568 C~2nw6 2015 12 31.37031 03 16 32.141 +15 08 57.02 24.7w 15VP170 568 C~2nw6 2016 01 07.39971 03 16 13.179 +15 08 15.76 24.8w 15VP170 568 C~2nw6 2016 02 05.29926 03 15 40.565 +15 08 39.44 24.7w 15VP170 568 C~2nw6 2016 02 11.25262 03 15 43.639 +15 09 24.08 24.8w 15VP170 568 C~2nw6 2016 09 07.58521 03 28 54.838 +16 01 50.80 24.5w 15VP170 568 C~2nw6 2016 09 27.51883 03 28 14.460 +15 58 38.30 25.1w 15VP170 568 C~2nw6 2016 09 29.49637 03 28 08.717 +15 58 13.72 24.3w 15VP170 568 C~2nw6 2016 10 05.49953 03 27 49.545 +15 56 53.84 24.8w 15VP170 568 C~2nw6 2016 10 07.50403 03 27 42.599 +15 56 25.69 24.7w 15VP170 568 C~2nw6 2016 10 07.59973 03 27 42.240 +15 56 24.26 25.0w 15VP170 568 C~2nw6 2016 10 09.50422 03 27 35.405 +15 55 56.62 25.0w 15VP170 568 C~2nw6 2016 10 09.57681 03 27 35.138 +15 55 55.70 24.5w 15VP170 568 C~2nw6 2016 11 02.49102 03 25 53.503 +15 49 30.33 24.4w 15VP170 568 C~2nw6 2016 11 04.46713 03 25 44.181 +15 48 56.62 24.3w 15VP170 568 C~2nw6 2016 12 28.44224 03 21 46.229 +15 36 19.36 24.8w 15VP170 568 C~2nw6 2016 12 28.45409 03 21 46.211 +15 36 19.29 24.6w 15VP170 568 C~2nw6 2017 01 27.30860 03 20 45.895 +15 34 54.11 24.7w 15VP170 568 C~2nw6 2017 12 13.36708 03 27 55.238 +16 05 45.62 24.7w 15VP170 568 C~2nw6
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 0.00
2 0.0133 -106.94 -0.02 -12.72 0.04
3 0.0819 -1107.31 0.04 -63.97 0.05
4 0.0820 -1110.57 0.01 -64.05 0.04
5 0.0875 -1217.84 0.01 -66.79 0.03
6 0.1635 -3009.96 -0.18 -78.68 -0.12
7 0.1637 -3014.98 -0.12 -78.60 -0.11
8 0.1639 -3019.90 -0.02 -78.53 -0.10
9 0.1667 -3092.25 -0.03 -77.76 0.05
10 0.1940 -3807.82 -0.07 -67.63 -0.02
11 0.1942 -3813.99 0.14 -67.43 0.06
12 0.2457 -5115.45 -0.04 -27.96 0.11
13 0.2460 -5124.34 0.20 -27.69 -0.04
14 0.3142 -6504.65 -0.07 61.65 0.02
15 0.3334 -6780.80 0.10 92.99 -0.01
16 0.4125 -7231.20 -0.02 238.58 -0.02
17 0.4288 -7176.55 0.09 270.13 0.05
18 1.0019 4682.23 -0.01 427.62 0.03
19 1.0565 4070.31 0.09 383.87 -0.06
20 1.0619 3983.96 0.13 380.40 -0.05
21 1.0784 3696.21 0.07 371.03 -0.08
22 1.0839 3592.15 0.10 368.42 0.02
23 1.0841 3586.78 -0.10 368.31 0.01
24 1.0893 3484.39 -0.07 365.83 -0.10
25 1.0895 3480.43 0.03 365.88 0.02
26 1.1550 1964.04 0.02 355.50 0.03
27 1.1604 1825.34 0.02 356.29 -0.04
28 1.3082 -1690.77 -0.22 485.61 0.12
29 1.3082 -1691.03 0.08 485.60 0.07
30 1.3900 -2555.66 0.04 624.40 0.02
31 2.2662 3906.79 -0.11 866.32 -0.02
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.
15VP170 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.495 46.532 46.460 ecceobj 0.130 0.134 0.127 incobj 5.919 5.919 5.918 qmin 39.238 39.164 39.348 qmax 53.302 53.530 53.114 amean 46.118 46.154 46.084 amin 45.725 45.770 45.698 amax 46.554 46.588 46.520 emean 0.132 0.136 0.129 emin 0.119 0.123 0.115 emax 0.145 0.149 0.143 imean 4.389 4.393 4.386 imin 3.857 3.855 3.865 imax 4.942 4.965 4.921 excite_mean 0.153 0.156 0.150 fracstop 1.000 1.000 1.000 cjmean 3.099 3.098 3.100 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 172.2 172.2 172.0 kozaiamp 180.0 180.0 180.0