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: 17FP161 # Created Sat Apr 27 01:18:14 2024 # Orbit generated from Bernstein formalism # Fitting 12 observations of 12 # Arc: 1.23y # First observation: 2017/03/23 # Last observation: 2018/06/14 Preliminary a, adot, b, bdot, g, gdot: -0.000013 0.015933 0.000001 0.000458 0.019414 0.000000 # Chi-squared of fit: 7.94 DOF: 18 RMS: 0.14 # Min/Max residuals: -0.20 0.35 # Exact a, adot, b, bdot, g, gdot: 1.296524E-05 1.591439E-02 5.107094E-07 4.561254E-04 1.941639E-02 -1.981237E-03 # Covariance matrix: 7.2695E-13 6.7068E-13 -2.6791E-14 5.2933E-14 1.6677E-12 9.1469E-11 6.7068E-13 2.4355E-12 -5.2810E-14 1.0021E-13 3.3654E-12 1.9462E-10 -2.6791E-14 -5.2810E-14 2.6915E-13 -2.6598E-13 -9.7835E-14 -5.1107E-12 5.2933E-14 1.0021E-13 -2.6598E-13 4.8236E-13 1.9478E-13 9.5287E-12 1.6677E-12 3.3654E-12 -9.7835E-14 1.9478E-13 6.0620E-12 3.2889E-10 9.1469E-11 1.9462E-10 -5.1107E-12 9.5287E-12 3.2889E-10 1.9422E-08 # lat0 lon0 xBary yBary zBary JD0 15.375274 -152.273953 0.426159 0.238092 -0.865248 2457835.762831 # Heliocentric elements and errors Epoch: 2457830.5000 = 2017/03/18 Mean Anomaly: 243.45630 +/- 2.063 Argument of Peri: 214.85161 +/- 1.882 Long of Asc Node: 123.84937 +/- 0.013 Inclination: 15.20932 +/- 0.000 Eccentricity: 0.15771073 +/- 0.0059 Semi-Major Axis: 48.12865561 +/- 0.0996 Time of Perihelion: 2497311.6992 +/- 688.1 Perihelion: 40.53825006 +/- 0.2951 Aphelion: 55.71906115 +/- 0.3055 Period (y) 333.8980 +/- 1.04 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -44.95325470 +/- 0.0056 Ecliptic Y -23.14920714 +/- 0.0029 Ecliptic Z 13.65549626 +/- 0.0017 Ecliptic XDOT 0.00130103 +/- 0.0000 Ecliptic YDOT -0.00185972 +/- 0.0000 Ecliptic ZDOT -0.00001213 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 52.37512270 +/- 0.0050 Geocenter to KBO 51.50289251 +/- 0.0065 # Hcoef: 7.11
The following table shows the complete astrometric record for 17FP161. 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 (17FP161) followed by the observatory code and reference code for the source of the astrometry.
2017 03 23.26203 14 04 49.699 +03 42 59.68 24.3r 17FP161 807 C~2b81 2017 03 23.32312 14 04 49.516 +03 43 01.64 24.2r 17FP161 807 C~2b81 2017 04 20.20703 14 03 11.584 +03 54 15.86 17FP161 G37 C~2b81 2017 04 20.28797 14 03 11.271 +03 54 17.62 17FP161 G37 C~2b81 2017 04 24.29268 14 02 56.296 +03 55 38.61 17FP161 304 C~2b81 2017 04 25.28043 14 02 52.598 +03 55 57.86 17FP161 304 C~2b81 2018 03 11.36629 14 08 52.408 +03 19 38.64 24.2r 17FP161 304 C~2b81 2018 03 11.40495 14 08 52.305 +03 19 39.69 17FP161 304 C~2b81 2018 03 12.36674 14 08 49.873 +03 20 05.19 17FP161 304 C~2b81 2018 03 12.39202 14 08 49.819 +03 20 05.83 17FP161 304 C~2b81 2018 06 14.18710 14 03 42.433 +03 45 19.22 24.0R 17FP161 G37 C~2kSp 2018 06 14.27693 14 03 42.208 +03 45 19.21 17FP161 G37 C~2kSp
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 -0.00 0.00 -0.03
2 0.0002 -3.25 0.04 0.87 0.35
3 0.0765 -1612.61 0.03 114.92 -0.20
4 0.0767 -1617.62 -0.08 114.92 -0.17
5 0.0877 -1855.90 0.06 111.75 -0.08
6 0.0904 -1914.48 -0.05 110.27 0.04
7 0.9667 3894.86 -0.14 -26.62 0.11
8 0.9669 3893.05 -0.20 -26.18 0.11
9 0.9695 3849.95 0.07 -15.22 0.03
10 0.9696 3848.96 0.26 -14.91 0.06
11 1.2264 -991.37 0.21 -224.54 -0.17
12 1.2266 -994.51 -0.20 -225.74 -0.05
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.
17FP161 quality flag:2 Type: SCATNEAR SCATNEAR 2:1E axisobj 47.554 47.835 47.321 ecceobj 0.166 0.182 0.151 incobj 15.213 15.213 15.214 qmin 38.772 38.319 38.829 qmax 57.288 58.420 57.526 amean 47.799 48.146 47.796 amin 47.318 47.641 47.259 amax 48.323 48.680 48.433 emean 0.103 0.183 0.144 emin 0.002 0.166 0.096 emax 0.186 0.202 0.188 imean 15.179 13.699 14.038 imin 13.143 13.137 12.971 imax 16.483 14.331 15.208 excite_mean 0.285 0.299 0.283 fracstop 1.000 1.000 1.000 cjmean 3.046 3.041 3.049 libcent 0 -180.0 -180.0 180.2 libamp 0 -180.0 -180.0 170.2 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 144.5 182.4 177.4 kozaiamp 160.5 179.9 179.9