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: 15VA164
# Created Sun Dec 22 02:10:32 2024
# Orbit generated from Bernstein formalism
# Fitting 29 observations of 29
# Arc: 2.32y
# First observation: 2015/08/20
# Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
-0.000076 0.017767 -0.000004 -0.008188 0.021531 0.000000
# Chi-squared of fit: 3.61 DOF: 52 RMS: 0.06
# Min/Max residuals: -0.21 0.17
# Exact a, adot, b, bdot, g, gdot:
1.302359E-05 1.756887E-02 -6.106123E-06 -8.091600E-03 2.138125E-02 1.710090E-03
# Covariance matrix:
2.0483E-13 -3.4749E-14 9.9179E-15 -3.5203E-14 1.3323E-13 2.0551E-12
-3.4749E-14 2.6265E-13 3.9678E-14 -1.4117E-13 1.7764E-13 8.1276E-12
9.9179E-15 3.9678E-14 1.3341E-13 -1.1962E-13 4.0063E-14 1.9728E-12
-3.5203E-14 -1.4117E-13 -1.1962E-13 2.1990E-13 -1.4244E-13 -7.0197E-12
1.3323E-13 1.7764E-13 4.0063E-14 -1.4244E-13 2.8604E-13 8.2347E-12
2.0551E-12 8.1276E-12 1.9728E-12 -7.0197E-12 8.2347E-12 4.0395E-10
# lat0 lon0 xBary yBary zBary JD0
0.107764 54.766655 1.013743 0.000209 -0.041783 2457255.041279
# Heliocentric elements and errors
Epoch: 2457250.5000 = 2015/08/16
Mean Anomaly: 105.93845 +/- 0.373
Argument of Peri: 66.26477 +/- 0.357
Long of Asc Node: 233.76320 +/- 0.000
Inclination: 24.70607 +/- 0.001
Eccentricity: 0.07015176 +/- 0.0009
Semi-Major Axis: 45.73669097 +/- 0.0073
Time of Perihelion: 2424003.9448 +/- 116.6
Perihelion: 42.52818176 +/- 0.0422
Aphelion: 48.94520017 +/- 0.0424
Period (y) 309.3181 +/- 0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 27.83000244 +/- 0.0007
Ecliptic Y 37.65118691 +/- 0.0009
Ecliptic Z 0.08770590 +/- 0.0000
Ecliptic XDOT -0.00171210 +/- 0.0000
Ecliptic YDOT 0.00147194 +/- 0.0000
Ecliptic ZDOT -0.00103565 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 46.82017305 +/- 0.0009
Geocenter to KBO 46.76994761 +/- 0.0012
# Hcoef: 7.12
The following table shows the complete astrometric record for 15VA164. 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 (15VA164) followed by the observatory code and reference code for the source of the astrometry.
2015 08 20.54049 03 29 31.825 +19 03 52.37 24.1w 15VA164 568 C~2fCN 2015 09 07.59637 03 29 26.652 +19 02 11.09 24.1w 15VA164 568 C~2fCN 2015 09 12.44325 03 29 20.533 +19 01 26.83 24.3w 15VA164 568 C~2fCN 2015 10 07.49180 03 28 20.081 +18 55 53.66 24.1w 15VA164 568 C~2fCN 2015 10 07.55020 03 28 19.881 +18 55 52.76 24.0w 15VA164 568 C~2fCN 2015 11 06.30734 03 26 21.294 +18 46 23.52 22.7r 15VA164 568 C~2fCN 2015 11 06.37060 03 26 20.996 +18 46 22.38 23.9r 15VA164 568 C~2fCN 2015 11 06.44142 03 26 20.665 +18 46 20.88 24.0r 15VA164 568 C~2fCN 2015 11 07.46098 03 26 16.092 +18 45 59.33 23.9w 15VA164 568 C~2fCN 2015 11 17.44217 03 25 30.735 +18 42 26.54 23.7w 15VA164 568 C~2fCN 2015 12 31.32982 03 22 35.640 +18 28 13.47 24.1w 15VA164 568 C~2fCN 2016 01 07.35914 03 22 16.857 +18 26 30.74 24.1w 15VA164 568 C~2fCN 2016 02 05.30505 03 21 41.829 +18 22 06.12 24.2w 15VA164 568 C~2fCN 2016 02 11.25843 03 21 43.793 +18 21 46.19 24.1w 15VA164 568 C~2fCN 2016 09 07.61412 03 34 02.997 +18 49 28.26 15VA164 568 C~2fCN 2016 09 27.53935 03 33 26.444 +18 45 38.09 24.1w 15VA164 568 C~2fCN 2016 10 09.53365 03 32 50.450 +18 42 31.12 24.0w 15VA164 568 C~2fCN 2016 10 09.60571 03 32 50.206 +18 42 29.91 23.9w 15VA164 568 C~2fCN 2016 10 28.47058 03 31 37.458 +18 36 39.93 15VA164 568 C~2fCN 2016 10 28.49380 03 31 37.365 +18 36 39.45 23.9w 15VA164 568 C~2fCN 2016 10 29.53251 03 31 32.927 +18 36 18.70 24.2w 15VA164 568 C~2fCN 2016 11 02.58549 03 31 15.329 +18 34 56.60 24.0w 15VA164 568 C~2fCN 2016 12 24.34518 03 27 34.756 +18 17 50.78 23.9w 15VA164 568 C~2fCN 2016 12 24.36175 03 27 34.697 +18 17 50.54 24.1w 15VA164 568 C~2fCN 2017 01 27.31949 03 26 20.968 +18 11 03.30 24.3w 15VA164 568 C~2fCN 2017 09 15.55809 03 38 28.698 +18 35 11.48 24.1w 15VA164 568 C~2fCN 2017 09 20.60688 03 38 19.723 +18 34 12.39 24.3w 15VA164 568 C~2fCN 2017 12 13.37172 03 32 54.980 +18 08 34.27 24.2w 15VA164 568 C~2fCN 2017 12 13.40930 03 32 54.822 +18 08 33.49 24.2w 15VA164 568 C~2fCN
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 -0.01 0.00 0.03
2 0.0494 -95.75 0.05 -80.44 0.05
3 0.0627 -190.67 -0.21 -102.29 0.06
4 0.1313 -1103.52 0.02 -216.39 -0.06
5 0.1314 -1106.49 -0.02 -216.57 0.01
6 0.2129 -2878.32 0.17 -354.59 -0.16
7 0.2131 -2882.71 0.06 -354.64 0.04
8 0.2133 -2887.63 -0.06 -354.94 0.06
9 0.2161 -2955.91 -0.03 -359.76 -0.03
10 0.2434 -3633.01 0.03 -406.28 -0.07
11 0.3636 -6258.25 -0.05 -609.32 -0.01
12 0.3828 -6543.06 -0.06 -641.28 0.05
13 0.4621 -7092.94 0.07 -771.25 0.07
14 0.4784 -7070.92 -0.02 -797.63 0.04
15 1.0515 3528.42 0.07 -1761.26 -0.01
16 1.1061 2969.43 -0.07 -1861.83 -0.03
17 1.1389 2428.22 0.01 -1921.80 -0.02
18 1.1391 2424.57 0.08 -1922.15 -0.03
19 1.1908 1336.87 -0.07 -2014.75 0.03
20 1.1908 1335.47 0.03 -2014.90 -0.01
21 1.1937 1269.24 -0.00 -2019.90 -0.01
22 1.2048 1006.63 -0.01 -2039.48 -0.11
23 1.3465 -2287.55 0.04 -2272.10 0.02
24 1.3465 -2288.42 0.03 -2272.13 0.06
25 1.4395 -3407.02 0.00 -2408.27 -0.05
26 2.0726 7001.80 -0.02 -3477.49 0.05
27 2.0864 6863.84 0.07 -3505.53 0.08
28 2.3158 2005.63 -0.02 -3915.86 0.01
29 2.3159 2003.25 -0.09 -3916.08 -0.07
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.
15VA164 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 46.147 46.172 46.123 ecceobj 0.072 0.075 0.070 incobj 24.606 24.606 24.606 qmin 41.893 41.791 41.960 qmax 49.978 50.149 49.839 amean 45.827 45.852 45.804 amin 45.472 45.492 45.450 amax 46.206 46.236 46.174 emean 0.071 0.073 0.069 emin 0.061 0.062 0.058 emax 0.082 0.085 0.080 imean 25.785 25.787 25.784 imin 25.524 25.522 25.520 imax 26.015 26.017 26.013 excite_mean 0.441 0.441 0.440 fracstop 1.000 1.000 1.000 cjmean 2.872 2.872 2.872 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 172.1 172.3 172.0 kozaiamp 180.0 180.0 180.0