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: 17BS236
# Created Thu Oct 31 01:10:31 2024
# Orbit generated from Bernstein formalism
# Fitting 29 observations of 29
# Arc: 0.90y
# First observation: 2016/04/02
# Last observation: 2017/02/23
Preliminary a, adot, b, bdot, g, gdot:
-0.000040 0.021775 0.000002 -0.009512 0.023951 0.000000
# Chi-squared of fit: 10.15 DOF: 52 RMS: 0.10
# Min/Max residuals: -0.28 0.23
# Exact a, adot, b, bdot, g, gdot:
1.381170E-05 2.188354E-02 -6.565451E-06 -9.626887E-03 2.437930E-02 4.064629E-03
# Covariance matrix:
1.9667E-13 7.4330E-13 2.2373E-14 -3.4241E-13 5.3890E-13 3.9022E-11
7.4330E-13 1.0702E-10 1.9887E-12 -3.2652E-11 3.6970E-11 3.7100E-09
2.2373E-14 1.9887E-12 1.6469E-13 -7.7596E-13 7.0925E-13 6.9835E-11
-3.4241E-13 -3.2652E-11 -7.7596E-13 1.0408E-11 -1.1554E-11 -1.1435E-09
5.3890E-13 3.6970E-11 7.0925E-13 -1.1554E-11 1.3633E-11 1.3132E-09
3.9022E-11 3.7100E-09 6.9835E-11 -1.1435E-09 1.3132E-09 1.2995E-07
# lat0 lon0 xBary yBary zBary JD0
2.591305 -174.574619 -0.127464 0.044782 -0.986406 2457480.894196
# Heliocentric elements and errors
Epoch: 2457480.5000 = 2016/04/02
Mean Anomaly: 61.47568 +/- 0.762
Argument of Peri: 92.37939 +/- 0.629
Long of Asc Node: 11.34534 +/- 0.001
Inclination: 23.82343 +/- 0.003
Eccentricity: 0.17990727 +/- 0.0153
Semi-Major Axis: 44.58925646 +/- 0.2635
Time of Perihelion: 2438909.1022 +/- 160.7
Perihelion: 36.56732519 +/- 0.7169
Aphelion: 52.61118774 +/- 0.7509
Period (y) 297.7512 +/- 2.64
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.76756837 +/- 0.0062
Ecliptic Y -4.09716076 +/- 0.0006
Ecliptic Z 1.85425272 +/- 0.0003
Ecliptic XDOT -0.00027015 +/- 0.0000
Ecliptic YDOT -0.00250128 +/- 0.0000
Ecliptic ZDOT -0.00105937 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 42.00898412 +/- 0.0061
Geocenter to KBO 41.01840322 +/- 0.0062
# Hcoef: 7.68
The following table shows the complete astrometric record for 17BS236. 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 (17BS236) followed by the observatory code and reference code for the source of the astrometry.
2016 04 02.393407 12 24 01.59 +00 13 26.4 17BS236 T09 C~83Eq 2016 04 02.525980 12 24 00.96 +00 13 29.6 17BS236 T09 C~83Eq 2016 04 04.34883 12 23 52.49 +00 14 12.5 24.3g 17BS236 T09 C~89UT 2016 04 04.36800 12 23 52.40 +00 14 13.0 24.7g 17BS236 T09 C~89UT 2016 04 04.37012 12 23 52.39 +00 14 13.0 24.5g 17BS236 T09 C~89UT 2016 04 04.38940 12 23 52.30 +00 14 13.6 24.8g 17BS236 T09 C~89UT 2016 04 04.41508 12 23 52.19 +00 14 14.1 24.4g 17BS236 T09 C~89UT 2016 04 04.41948 12 23 52.15 +00 14 14.1 24.3g 17BS236 T09 C~89UT 2016 06 04.25539 12 20 29.23 +00 27 42.8 23.9z 17BS236 T09 C~8COq 2016 06 04.27307 12 20 29.23 +00 27 42.4 24.0z 17BS236 T09 C~8COq 2016 06 04.28926 12 20 29.18 +00 27 42.4 23.7z 17BS236 T09 C~8COq 2016 06 04.34327 12 20 29.13 +00 27 42.6 23.7z 17BS236 T09 C~8COq 2016 06 05.311488 12 20 27.88 +00 27 41.5 17BS236 T09 C~83Eq 2016 06 05.356114 12 20 27.82 +00 27 41.4 17BS236 T09 C~83Eq 2017 01 23.61828 12 31 59.74 -01 08 59.2 23.7i 17BS236 T09 C~81Bp 2017 01 23.64653 12 31 59.68 -01 08 58.9 23.9i 17BS236 T09 C~81Bp 2017 01 23.65191 12 31 59.68 -01 08 58.9 23.7i 17BS236 T09 C~81Bp 2017 01 28.59808 12 31 50.73 -01 08 15.0 23.5z 17BS236 T09 C~81Bp 2017 01 28.61691 12 31 50.70 -01 08 14.7 23.4z 17BS236 T09 C~81Bp 2017 01 28.61959 12 31 50.68 -01 08 14.7 23.5z 17BS236 T09 C~81Bp 2017 01 28.64259 12 31 50.64 -01 08 14.3 23.7z 17BS236 T09 C~81Bp 2017 01 28.64799 12 31 50.63 -01 08 14.5 23.4z 17BS236 T09 C~81Bp 2017 01 28.65336 12 31 50.62 -01 08 14.5 23.8z 17BS236 T09 C~81Bp 2017 02 02.60942 12 31 39.62 -01 07 17.9 23.7i 17BS236 T09 C~81Bp 2017 02 02.62764 12 31 39.59 -01 07 17.9 23.6i 17BS236 T09 C~81Bp 2017 02 02.64454 12 31 39.53 -01 07 17.7 23.5i 17BS236 T09 C~81Bp 2017 02 23.52167 12 30 33.87 -01 01 27.5 23.7r 17BS236 T09 C~81Bp 2017 02 23.56346 12 30 33.70 -01 01 26.7 24.1r 17BS236 T09 C~81Bp 2017 02 23.59748 12 30 33.57 -01 01 26.0 24.3r 17BS236 T09 C~81Bp
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 0.08 0.00 0.07
2 0.0004 -9.94 0.04 -0.80 0.11
3 0.0054 -143.60 -0.04 -11.72 -0.05
4 0.0054 -145.03 -0.05 -11.80 0.00
5 0.0054 -145.17 -0.03 -11.86 -0.04
6 0.0055 -146.65 -0.07 -11.84 0.10
7 0.0055 -148.36 0.12 -12.03 0.07
8 0.0055 -148.91 -0.10 -12.27 -0.14
9 0.1721 -3264.37 -0.26 -474.91 0.07
10 0.1722 -3264.22 0.23 -475.27 -0.13
11 0.1722 -3264.90 -0.14 -475.57 -0.28
12 0.1723 -3265.67 0.12 -475.68 0.10
13 0.1750 -3282.46 0.06 -484.12 0.07
14 0.1751 -3283.25 0.06 -484.57 0.03
15 0.8110 8548.97 0.10 -1702.89 -0.06
16 0.8111 8548.02 -0.11 -1702.97 -0.06
17 0.8111 8548.02 0.03 -1702.97 -0.04
18 0.8247 8407.14 -0.02 -1715.76 -0.08
19 0.8247 8406.61 0.07 -1715.66 0.08
20 0.8247 8406.33 -0.12 -1715.78 -0.03
21 0.8248 8405.62 -0.07 -1715.65 0.17
22 0.8248 8405.56 0.05 -1715.89 -0.05
23 0.8248 8405.43 0.09 -1715.95 -0.09
24 0.8384 8231.24 -0.09 -1729.24 0.22
25 0.8384 8230.83 0.22 -1729.42 0.10
26 0.8385 8229.92 -0.02 -1729.59 -0.02
27 0.8956 7185.51 0.00 -1797.62 0.03
28 0.8957 7182.85 -0.09 -1797.89 -0.07
29 0.8958 7180.78 -0.06 -1798.02 -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.
17BS236 quality flag:2 Type: SCATEXTD SCATNEAR SCATEXTD axisobj 44.122 45.281 43.261 ecceobj 0.175 0.228 0.121 incobj 23.941 23.929 23.953 qmin 36.047 34.403 37.614 qmax 52.898 57.015 49.519 amean 44.296 45.460 43.419 amin 43.902 45.023 43.072 amax 44.720 46.027 43.800 emean 0.168 0.219 0.116 emin 0.152 0.197 0.102 emax 0.185 0.241 0.131 imean 24.035 24.161 23.963 imin 23.519 23.414 23.544 imax 24.398 24.712 24.307 excite_mean 0.441 0.464 0.422 fracstop 1.000 1.000 1.000 cjmean 2.863 2.849 2.873 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 175.6 174.4 175.7 kozaiamp 179.9 180.0 180.0