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: 15VB208 # Created Sat Apr 27 01:17:55 2024 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 3.89y # First observation: 2015/01/13 # Last observation: 2018/12/02 Preliminary a, adot, b, bdot, g, gdot: 0.000476 0.034173 0.000310 0.005483 0.028284 0.000000 # Chi-squared of fit: 4.71 DOF: 16 RMS: 0.12 # Min/Max residuals: -0.17 0.31 # Exact a, adot, b, bdot, g, gdot: 2.044755E-05 3.459469E-02 3.992585E-06 5.439271E-03 2.719767E-02 6.944580E-03 # Covariance matrix: 1.2051E-12 -1.3075E-12 -1.1748E-13 -1.0379E-13 -5.9649E-13 -7.5284E-12 -1.3075E-12 1.9534E-12 -8.6070E-15 1.4921E-13 4.4353E-13 1.1716E-11 -1.1748E-13 -8.6070E-15 5.0907E-13 -1.0537E-13 3.9105E-13 1.4245E-13 -1.0379E-13 1.4921E-13 -1.0537E-13 7.3561E-14 6.6713E-14 9.3954E-13 -5.9649E-13 4.4353E-13 3.9105E-13 6.6713E-14 1.1194E-12 3.2514E-12 -7.5284E-12 1.1716E-11 1.4245E-13 9.3954E-13 3.2514E-12 7.2784E-11 # lat0 lon0 xBary yBary zBary JD0 -34.295262 14.949654 -0.973832 0.070105 0.102430 2457035.600258 # Heliocentric elements and errors Epoch: 2457030.5000 = 2015/01/08 Mean Anomaly: 6.35296 +/- 0.008 Argument of Peri: 250.97049 +/- 0.027 Long of Asc Node: 89.43427 +/- 0.001 Inclination: 35.64857 +/- 0.000 Eccentricity: 0.62157131 +/- 0.0003 Semi-Major Axis: 90.82251032 +/- 0.0624 Time of Perihelion: 2451451.4259 +/- 3.5 Perihelion: 34.36984390 +/- 0.0352 Aphelion: 147.27517673 +/- 0.1045 Period (y) 865.5625 +/- 0.89 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 28.97330615 +/- 0.0011 Ecliptic Y 8.74638246 +/- 0.0003 Ecliptic Z -20.71707384 +/- 0.0008 Ecliptic XDOT -0.00004621 +/- 0.0000 Ecliptic YDOT 0.00358786 +/- 0.0000 Ecliptic ZDOT 0.00005855 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 36.67627059 +/- 0.0010 Geocenter to KBO 36.76785492 +/- 0.0014 # Hcoef: 8.06
The following table shows the complete astrometric record for 15VB208. 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 (15VB208) followed by the observatory code and reference code for the source of the astrometry.
2015 01 13.09948 01 50 56.236 -25 36 23.34 24.6g 15VB208 W84 C~55XG 2015 11 06.14817 02 01 52.882 -25 07 02.76 23.6i 15VB208 W84 C~55XG 2015 11 06.14954 02 01 52.846 -25 07 02.98 24.1r 15VB208 W84 C~55XG 2015 11 21.09974 02 00 34.194 -25 05 39.62 23.3z 15VB208 W84 C~55XG 2015 11 21.10387 02 00 34.161 -25 05 39.93 23.3i 15VB208 W84 C~55XG 2015 12 05.13114 01 59 31.382 -25 00 29.87 23.7r 15VB208 W84 C~55XG 2016 11 09.28325 02 08 39.308 -23 56 46.76 23.6r 15VB208 W84 C~55XG 2018 09 19.36104 02 26 27.352 -21 13 18.07 23.6r 15VB208 W84 C~55XG 2018 11 26.17092 02 20 47.463 -21 34 45.67 23.5i 15VB208 W84 C~55XG 2018 11 29.22642 02 20 33.128 -21 33 58.31 23.9r 15VB208 W84 C~55XG 2018 12 02.19152 02 20 19.747 -21 33 03.01 24.6g 15VB208 W84 C~55XG
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 -0.07 0.00 -0.17
2 0.8133 8784.39 0.31 -2292.05 0.05
3 0.8133 8783.86 -0.13 -2292.03 0.03
4 0.8542 7861.66 0.15 -1742.85 0.18
5 0.8542 7861.12 -0.17 -1742.93 -0.07
6 0.8926 7231.61 -0.02 -1087.54 0.05
7 1.8239 15658.82 -0.08 -1021.80 -0.03
8 3.6831 33582.49 0.01 725.87 -0.16
9 3.8688 28687.53 -0.06 1869.12 0.02
10 3.8771 28530.81 0.00 2006.58 0.10
11 3.8853 28389.84 0.06 2144.70 -0.01
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.
15VB208 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 93.230 93.447 93.015 ecceobj 0.631 0.632 0.630 incobj 35.664 35.664 35.664 qmin 33.377 32.085 33.404 qmax 153.551 155.568 153.268 amean 91.505 91.923 91.361 amin 90.015 90.266 89.767 amax 93.915 94.406 93.742 emean 0.615 0.632 0.618 emin 0.596 0.617 0.606 emax 0.636 0.652 0.635 imean 34.915 33.586 34.558 imin 33.805 32.228 33.850 imax 36.163 34.352 35.335 excite_mean 0.840 0.840 0.839 fracstop 1.000 1.000 1.000 cjmean 2.584 2.583 2.584 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 239.8 286.5 280.6 kozaiamp 180.0 32.8 180.0