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: 17OK69 # Created Sun Nov 24 02:10:52 2024 # Orbit generated from Bernstein formalism # Fitting 15 observations of 15 # Arc: 4.94y # First observation: 2017/07/26 # Last observation: 2022/07/04 Preliminary a, adot, b, bdot, g, gdot: -0.000117 0.011225 0.000014 -0.003998 0.016471 0.000000 # Chi-squared of fit: 6.34 DOF: 24 RMS: 0.11 # Min/Max residuals: -0.29 0.31 # Exact a, adot, b, bdot, g, gdot: 8.970809E-06 1.104247E-02 -3.318117E-06 -3.953774E-03 1.670399E-02 -2.290104E-03 # Covariance matrix: 4.0814E-13 -7.4084E-13 -3.0350E-14 2.0108E-13 2.7345E-13 -1.0334E-11 -7.4084E-13 2.0267E-12 1.0738E-13 -5.8706E-13 -5.9147E-13 3.0025E-11 -3.0350E-14 1.0738E-13 1.5205E-13 -7.4395E-14 -5.5446E-15 1.7139E-12 2.0108E-13 -5.8706E-13 -7.4395E-14 2.1144E-13 1.5492E-13 -8.9268E-12 2.7345E-13 -5.9147E-13 -5.5446E-15 1.5492E-13 4.0722E-13 -8.1004E-12 -1.0334E-11 3.0025E-11 1.7139E-12 -8.9268E-12 -8.1004E-12 4.5593E-10 # lat0 lon0 xBary yBary zBary JD0 13.505379 -58.035991 -0.027861 0.236494 -0.984323 2457960.790941 # Heliocentric elements and errors Epoch: 2457960.5000 = 2017/07/26 Mean Anomaly: 231.22755 +/- 0.223 Argument of Peri: 293.90648 +/- 0.213 Long of Asc Node: 154.54814 +/- 0.002 Inclination: 23.68237 +/- 0.001 Eccentricity: 0.27874830 +/- 0.0009 Semi-Major Axis: 50.24955214 +/- 0.0119 Time of Perihelion: 2504499.5151 +/- 78.7 Perihelion: 36.24257502 +/- 0.0464 Aphelion: 64.25652927 +/- 0.0481 Period (y) 356.2103 +/- 0.13 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 31.37327146 +/- 0.0012 Ecliptic Y -50.23380789 +/- 0.0019 Ecliptic Z 13.98075984 +/- 0.0005 Ecliptic XDOT 0.00142699 +/- 0.0000 Ecliptic YDOT 0.00113351 +/- 0.0000 Ecliptic ZDOT -0.00071788 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 60.85375307 +/- 0.0017 Geocenter to KBO 59.86594426 +/- 0.0023 # Hcoef: 5.83
The following table shows the complete astrometric record for 17OK69. 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 (17OK69) followed by the observatory code and reference code for the source of the astrometry.
2017 07 26.29014 20 04 49.460 -06 32 18.26 23.5r 17OK69 568 C~31Lz 2017 07 26.48039 20 04 48.792 -06 32 20.79 23.5r 17OK69 568 C~31Lz 2017 09 21.11600 20 02 17.531 -06 48 49.15 23.6r 17OK69 G37 C~31Lz 2017 09 21.12891 20 02 17.514 -06 48 49.33 23.6r 17OK69 G37 C~31Lz 2017 09 21.15699 20 02 17.475 -06 48 49.82 17OK69 G37 C~31Lz 2017 09 21.16423 20 02 17.456 -06 48 50.19 17OK69 G37 C~31Lz 2017 09 21.20540 20 02 17.399 -06 48 50.82 17OK69 G37 C~31Lz 2017 09 21.21292 20 02 17.385 -06 48 50.89 17OK69 G37 C~31Lz 2017 09 22.11356 20 02 16.117 -06 49 07.56 17OK69 G37 C~31Lz 2018 05 16.34986 20 10 38.449 -06 32 54.19 23.5r 17OK69 304 C~31Lz 2018 05 17.38082 20 10 37.258 -06 32 47.69 23.4r 17OK69 304 C~31Lz 2019 06 06.330090 20 12 45.499 -06 36 46.04 23.8G 17OK69 G37 C~36sk 2019 06 06.425150 20 12 45.282 -06 36 46.14 17OK69 G37 C~36sk 2022 07 04.357870 20 19 41.138 -06 53 44.68 23.7G 17OK69 G37 C~5i4a 2022 07 04.423050 20 19 40.943 -06 53 45.47 17OK69 G37 C~5i4a
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 0.31 0.00 -0.09
2 0.0005 -10.26 0.10 -0.36 0.03
3 0.1556 -2421.88 -0.08 -490.18 0.00
4 0.1556 -2422.17 -0.03 -490.31 0.05
5 0.1557 -2422.84 0.02 -490.66 0.08
6 0.1557 -2423.19 -0.15 -490.97 -0.13
7 0.1558 -2424.16 -0.05 -491.40 -0.01
8 0.1558 -2424.37 -0.07 -491.43 0.06
9 0.1583 -2446.35 0.11 -503.75 0.07
10 0.8051 5074.38 -0.07 -1145.02 0.10
11 0.8079 5058.43 -0.29 -1134.86 -0.04
12 1.8618 6874.88 0.14 -1779.53 -0.03
13 1.8621 6871.70 0.06 -1778.93 -0.15
14 4.9393 12711.17 -0.08 -4126.18 0.16
15 4.9394 12708.16 0.07 -4126.32 -0.11
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.
17OK69 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 50.182 50.217 50.148 ecceobj 0.284 0.287 0.282 incobj 23.610 23.611 23.608 qmin 35.170 35.125 35.270 qmax 65.942 66.132 65.844 amean 50.259 50.294 50.242 amin 49.776 49.804 49.778 amax 50.852 50.887 50.833 emean 0.277 0.279 0.275 emin 0.259 0.260 0.257 emax 0.298 0.300 0.296 imean 22.924 22.938 22.905 imin 22.194 22.201 22.177 imax 23.428 23.474 23.393 excite_mean 0.478 0.480 0.477 fracstop 1.000 1.000 1.000 cjmean 2.885 2.884 2.887 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 180.1 178.2 180.4 kozaiamp 180.0 180.0 180.0