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: 17RZ137 # Created Wed Dec 25 02:10:57 2024 # Orbit generated from Bernstein formalism # Fitting 11 observations of 11 # Arc: 4.14y # First observation: 2017/09/14 # Last observation: 2021/11/05 Preliminary a, adot, b, bdot, g, gdot: 0.000067 0.030007 0.000001 -0.000767 0.027184 0.000000 # Chi-squared of fit: 4.23 DOF: 16 RMS: 0.11 # Min/Max residuals: -0.20 0.23 # Exact a, adot, b, bdot, g, gdot: 1.825686E-05 3.027451E-02 4.086204E-07 -7.636800E-04 2.729142E-02 3.565580E-03 # Covariance matrix: 5.0752E-13 -3.2477E-13 -8.9000E-15 9.6921E-15 2.4936E-13 -2.5032E-12 -3.2477E-13 1.0741E-12 9.9384E-15 -3.0850E-14 4.1154E-13 9.0923E-12 -8.9000E-15 9.9384E-15 2.5678E-13 -7.8565E-14 -7.8347E-15 9.8899E-14 9.6921E-15 -3.0850E-14 -7.8565E-14 5.1205E-14 -8.2875E-15 -2.7767E-13 2.4936E-13 4.1154E-13 -7.8347E-15 -8.2875E-15 7.9899E-13 3.0848E-12 -2.5032E-12 9.0923E-12 9.8899E-14 -2.7767E-13 3.0848E-12 8.1256E-11 # lat0 lon0 xBary yBary zBary JD0 -17.215904 19.498934 0.467727 -0.263933 -0.852342 2458010.878281 # Heliocentric elements and errors Epoch: 2458010.5000 = 2017/09/14 Mean Anomaly: 23.91889 +/- 0.041 Argument of Peri: 227.93813 +/- 0.072 Long of Asc Node: 114.59840 +/- 0.002 Inclination: 16.89589 +/- 0.000 Eccentricity: 0.20820949 +/- 0.0003 Semi-Major Axis: 45.75595197 +/- 0.0092 Time of Perihelion: 2450499.3158 +/- 12.8 Perihelion: 36.22912853 +/- 0.0138 Aphelion: 55.28277541 +/- 0.0161 Period (y) 309.5135 +/- 0.09 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X 33.98716587 +/- 0.0011 Ecliptic Y 11.53459801 +/- 0.0004 Ecliptic Z -10.84493326 +/- 0.0004 Ecliptic XDOT -0.00070811 +/- 0.0000 Ecliptic YDOT 0.00296376 +/- 0.0000 Ecliptic ZDOT -0.00017916 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 37.49382579 +/- 0.0010 Geocenter to KBO 36.64155735 +/- 0.0012 # Hcoef: 7.69
The following table shows the complete astrometric record for 17RZ137. 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 (17RZ137) followed by the observatory code and reference code for the source of the astrometry.
2017 09 14.37748 01 37 58.913 -08 19 16.90 23.3i 17RZ137 W84 C~55dE 2017 09 18.36643 01 37 42.740 -08 21 48.84 23.3r 17RZ137 W84 C~55dE 2017 11 09.18873 01 33 33.731 -08 46 13.50 23.1i 17RZ137 W84 C~55dE 2017 11 18.11684 01 32 54.520 -08 47 43.94 23.4r 17RZ137 W84 C~55dE 2018 09 09.36428 01 44 48.752 -07 38 54.09 22.9z 17RZ137 W84 C~55dE 2018 10 01.25192 01 43 18.291 -07 52 26.97 22.9i 17RZ137 W84 C~55dE 2018 11 30.09981 01 38 40.273 -08 11 38.03 23.3r 17RZ137 W84 C~55dE 2018 11 30.10118 01 38 40.263 -08 11 37.92 24.7g 17RZ137 W84 C~55dE 2021 11 05.229900 01 59 41.998 -06 16 46.08 23.4G 17RZ137 G37 C~5BgM 2021 11 05.284790 01 59 41.712 -06 16 47.06 17RZ137 G37 C~5BgM 2021 11 05.340070 01 59 41.444 -06 16 48.17 17RZ137 G37 C~5BgM
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 -0.15 0.00 -0.18
2 0.0109 -279.70 0.10 -49.67 0.22
3 0.1528 -4253.38 -0.08 -11.43 -0.20
4 0.1772 -4826.26 0.13 123.42 0.23
5 0.9856 6554.06 0.01 -78.73 -0.03
6 1.0455 4999.70 0.06 -315.80 -0.07
7 1.2094 742.11 -0.01 191.82 -0.06
8 1.2094 742.02 -0.04 191.98 0.07
9 4.1420 20792.54 0.07 -677.17 -0.03
10 4.1421 20788.19 -0.08 -676.40 0.08
11 4.1423 20784.03 -0.00 -675.86 -0.03
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.
17RZ137 quality flag:2 Type: SCATNEAR SCATEXTD SCATNEAR axisobj 46.361 46.394 46.329 ecceobj 0.217 0.218 0.217 incobj 16.898 16.898 16.898 qmin 35.396 35.500 35.528 qmax 57.112 57.079 56.938 amean 46.008 46.075 46.008 amin 45.573 45.671 45.572 amax 46.530 46.553 46.526 emean 0.211 0.210 0.210 emin 0.195 0.195 0.194 emax 0.229 0.227 0.225 imean 15.151 15.290 15.280 imin 14.407 14.713 14.632 imax 15.903 15.921 16.006 excite_mean 0.336 0.337 0.337 fracstop 1.000 1.000 1.000 cjmean 2.987 2.986 2.986 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 188.2 188.3 183.7 kozaiamp 180.0 180.0 180.0