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: 17BV236
# Created Mon Apr 28 01:11:03 2025
# Orbit generated from Bernstein formalism
# Fitting 26 observations of 26
# Arc: 3.00y
# First observation: 2016/04/02
# Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
-0.000065 0.022555 -0.000023 0.002456 0.022865 0.000000
# Chi-squared of fit: 15.68 DOF: 46 RMS: 0.14
# Min/Max residuals: -0.35 0.36
# Exact a, adot, b, bdot, g, gdot:
1.415172E-05 2.222993E-02 1.556731E-06 2.419195E-03 2.329639E-02 -4.063071E-03
# Covariance matrix:
1.9907E-13 -5.5462E-13 1.9866E-14 -5.4788E-14 5.7104E-14 -7.2023E-12
-5.5462E-13 3.5052E-12 -1.4067E-13 3.7675E-13 -8.4031E-13 4.9413E-11
1.9866E-14 -1.4067E-13 1.1183E-13 -6.9474E-14 3.6111E-14 -2.0164E-12
-5.4788E-14 3.7675E-13 -6.9474E-14 1.0031E-13 -9.1656E-14 5.4023E-12
5.7104E-14 -8.4031E-13 3.6111E-14 -9.1656E-14 4.1268E-13 -1.1969E-11
-7.2023E-12 4.9413E-11 -2.0164E-12 5.4023E-12 -1.1969E-11 7.0857E-10
# lat0 lon0 xBary yBary zBary JD0
2.190646 -174.394857 -0.124366 0.037898 -0.987090 2457480.894196
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 300.13858 +/- 0.027
Argument of Peri: 99.47898 +/- 0.132
Long of Asc Node: 166.72099 +/- 0.002
Inclination: 6.53521 +/- 0.001
Eccentricity: 0.18638678 +/- 0.0011
Semi-Major Axis: 46.92366275 +/- 0.0105
Time of Perihelion: 2477002.7909 +/- 5.7
Perihelion: 38.17771213 +/- 0.0544
Aphelion: 55.66961337 +/- 0.0551
Period (y) 321.4371 +/- 0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -43.66329122 +/- 0.0012
Ecliptic Y -4.41242916 +/- 0.0001
Ecliptic Z 1.64088774 +/- 0.0000
Ecliptic XDOT 0.00074096 +/- 0.0000
Ecliptic YDOT -0.00255934 +/- 0.0000
Ecliptic ZDOT 0.00026586 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.91634142 +/- 0.0012
Geocenter to KBO 42.92509701 +/- 0.0012
# Hcoef: 8.82
The following table shows the complete astrometric record for 17BV236. 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 (17BV236) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.393407 12 24 03.10 -00 12 54.1 17BV236 T09 C~86uj 2016 04 02.515196 12 24 02.57 -00 12 50.7 17BV236 T09 C~86uj 2016 04 04.34883 12 23 54.83 -00 11 58.3 25.9g 17BV236 T09 C~89UT 2016 04 04.38940 12 23 54.65 -00 11 57.4 25.6g 17BV236 T09 C~89UT 2016 04 04.40648 12 23 54.56 -00 11 57.1 26.1g 17BV236 T09 C~89UT 2016 04 04.41508 12 23 54.55 -00 11 56.7 26.1g 17BV236 T09 C~89UT 2016 04 04.41735 12 23 54.53 -00 11 56.6 25.9g 17BV236 T09 C~89UT 2016 06 05.311488 12 20 52.21 +00 07 09.2 17BV236 T09 C~86uj 2016 06 05.356114 12 20 52.17 +00 07 09.4 17BV236 T09 C~86uj 2017 01 28.59808 12 32 39.98 -01 02 40.6 24.9z 17BV236 T09 C~81Bp 2017 01 28.64259 12 32 39.92 -01 02 39.5 25.1z 17BV236 T09 C~81Bp 2017 01 28.64528 12 32 39.90 -01 02 39.4 24.3z 17BV236 T09 C~81Bp 2017 01 28.64799 12 32 39.91 -01 02 39.4 24.4z 17BV236 T09 C~81Bp 2017 02 02.60942 12 32 30.52 -01 01 17.1 24.8i 17BV236 T09 C~81Bp 2017 02 02.61925 12 32 30.50 -01 01 16.7 24.8i 17BV236 T09 C~81Bp 2017 02 02.62764 12 32 30.48 -01 01 16.7 24.3i 17BV236 T09 C~81Bp 2017 02 02.63614 12 32 30.45 -01 01 16.4 24.6i 17BV236 T09 C~81Bp 2017 02 23.52446 12 31 32.29 -00 53 39.1 25.1r 17BV236 T09 C~81Bp 2017 02 23.56346 12 31 32.17 -00 53 38.2 25.5r 17BV236 T09 C~81Bp 2017 02 23.56555 12 31 32.16 -00 53 37.7 25.9r 17BV236 T09 C~81Bp 2017 02 23.59748 12 31 32.06 -00 53 37.4 25.0r 17BV236 T09 C~81Bp 2017 02 23.63774 12 31 31.93 -00 53 36.4 25.4r 17BV236 T09 C~81Bp 2019 04 03.44005 12 38 56.36 -01 21 33.3 25.1i 17BV236 T09 C~86uj 2019 04 03.44273 12 38 56.35 -01 21 33.1 25.0i 17BV236 T09 C~86uj 2019 04 03.46423 12 38 56.26 -01 21 32.5 25.0i 17BV236 T09 C~86uj 2019 04 03.47225 12 38 56.21 -01 21 32.3 25.2i 17BV236 T09 C~86uj
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 0.19 0.00 0.02
2 0.0003 -8.65 0.15 -0.02 -0.08
3 0.0054 -136.00 -0.09 2.13 0.25
4 0.0055 -138.84 -0.07 1.89 -0.01
5 0.0055 -140.20 -0.23 1.63 -0.28
6 0.0055 -140.50 0.08 1.94 0.03
7 0.0055 -140.81 -0.08 1.91 -0.00
8 0.1750 -3106.01 -0.03 -28.58 -0.01
9 0.1751 -3106.64 0.08 -28.64 0.03
10 0.8247 8306.13 0.02 325.43 -0.35
11 0.8248 8304.87 0.12 326.09 0.15
12 0.8248 8304.55 -0.11 326.06 0.11
13 0.8248 8304.69 0.11 326.12 0.16
14 0.8384 8142.54 0.09 346.02 -0.16
15 0.8384 8142.10 0.01 346.27 0.05
16 0.8384 8141.83 0.05 346.15 -0.09
17 0.8384 8141.29 -0.17 346.25 -0.03
18 0.8956 7157.92 -0.27 421.24 -0.05
19 0.8957 7155.91 -0.02 421.36 -0.03
20 0.8957 7155.57 -0.23 421.76 0.36
21 0.8958 7154.07 0.13 421.44 -0.04
22 0.8959 7151.88 0.28 421.59 -0.01
23 3.0008 13955.59 0.03 1518.69 -0.07
24 3.0008 13955.37 0.01 1518.82 0.05
25 3.0009 13953.89 0.08 1518.83 0.06
26 3.0009 13953.11 -0.12 1518.72 -0.06
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.
17BV236 quality flag:3 Type: CLASSICAL CLASSICAL CLASSICAL axisobj 46.368 46.389 46.349 ecceobj 0.183 0.185 0.181 incobj 6.569 6.569 6.569 qmin 37.550 37.425 37.603 qmax 56.186 56.307 56.088 amean 46.651 46.671 46.633 amin 46.236 46.275 46.216 amax 47.139 47.159 47.112 emean 0.179 0.182 0.177 emin 0.165 0.168 0.163 emax 0.193 0.195 0.191 imean 6.421 6.442 6.428 imin 5.840 5.831 5.866 imax 7.037 7.062 7.015 excite_mean 0.211 0.214 0.210 fracstop 1.000 1.000 1.000 cjmean 3.079 3.078 3.080 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 179.3 180.0 179.1 kozaiamp 180.0 180.0 179.9