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: 17DO177 # Created Sun Dec 22 02:10:59 2024 # Orbit generated from Bernstein formalism # Fitting 22 observations of 22 # Arc: 60.86d # First observation: 2017/01/23 # Last observation: 2017/03/25 Preliminary a, adot, b, bdot, g, gdot: -0.000038 0.042317 0.000013 -0.007549 0.032387 0.000000 # Chi-squared of fit: 12.75 DOF: 38 RMS: 0.13 # Min/Max residuals: -0.35 0.26 # Exact a, adot, b, bdot, g, gdot: 1.794397E-05 3.486548E-02 -3.724639E-06 -7.521560E-03 3.118570E-02 3.339657E-03 # Covariance matrix: 4.8110E-13 2.2695E-12 2.2233E-14 -3.0567E-13 1.6878E-12 2.0165E-10 2.2695E-12 2.9062E-08 6.2501E-11 -1.0254E-10 4.6112E-09 -4.0050E-08 2.2233E-14 6.2501E-11 4.6437E-13 -2.7758E-12 9.9978E-12 -6.9835E-11 -3.0567E-13 -1.0254E-10 -2.7758E-12 2.5356E-11 -1.8048E-11 -2.5577E-10 1.6878E-12 4.6112E-09 9.9978E-12 -1.8048E-11 7.3790E-10 -5.0869E-09 2.0165E-10 -4.0050E-08 -6.9835E-11 -2.5577E-10 -5.0869E-09 3.4178E-07 # lat0 lon0 xBary yBary zBary JD0 -8.385333 152.792786 0.488871 -0.124681 -0.847121 2457776.921781 # Heliocentric elements and errors Epoch: 2457770.5000 = 2017/01/17 Mean Anomaly: 31.92313 +/- 5.180 Argument of Peri: 173.07719 +/- 7.173 Long of Asc Node: 298.84994 +/- 0.126 Inclination: 14.72693 +/- 0.048 Eccentricity: 0.12812764 +/- 0.0110 Semi-Major Axis: 36.70865994 +/- 0.2434 Time of Perihelion: 2450566.8229 +/- 1166.7 Perihelion: 32.00526597 +/- 0.4552 Aphelion: 41.41205391 +/- 0.4874 Period (y) 222.4134 +/- 2.21 # Ecliptic coordinates at JD0 (AU and AU/d) Ecliptic X -28.75485821 +/- 0.0246 Ecliptic Y 15.32581361 +/- 0.0126 Ecliptic Z -4.67632500 +/- 0.0041 Ecliptic XDOT -0.00156897 +/- 0.0000 Ecliptic YDOT -0.00264035 +/- 0.0000 Ecliptic ZDOT -0.00069609 +/- 0.0000 # Distances at JD0 (AU) Heliocenter to KBO 32.91793507 +/- 0.0223 Geocenter to KBO 32.06597789 +/- 0.0279 # Hcoef: 9.49
The following table shows the complete astrometric record for 17DO177. 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 (17DO177) followed by the observatory code and reference code for the source of the astrometry.
2017 01 23.42098 10 06 57.04 +02 38 37.8 24.9r 17DO177 T09 C~8HKf 2017 01 23.45863 10 06 56.85 +02 38 38.4 24.5r 17DO177 T09 C~8HKf 2017 01 23.49339 10 06 56.66 +02 38 38.9 24.3i 17DO177 T09 C~8HKf 2017 02 21.34603 10 04 12.92 +02 49 43.6 23.7z 17DO177 T09 C~8HKf 2017 02 21.37159 10 04 12.78 +02 49 44.1 23.8z 17DO177 T09 C~8HKf 2017 02 21.41923 10 04 12.50 +02 49 45.6 23.8z 17DO177 T09 C~8HKf 2017 02 23.33107 10 04 01.27 +02 50 40.2 25.8g 17DO177 T09 C~8HKf 2017 02 23.47842 10 04 00.36 +02 50 44.8 25.5r 17DO177 T09 C~8HKf 2017 02 23.49203 10 04 00.30 +02 50 45.1 25.2r 17DO177 T09 C~8HKf 2017 03 04.28899 10 03 09.52 +02 55 07.7 24.2z 17DO177 T09 C~8HKf 2017 03 04.31448 10 03 09.37 +02 55 08.7 24.0z 17DO177 T09 C~8HKf 2017 03 04.34002 10 03 09.22 +02 55 09.2 23.8z 17DO177 T09 C~8HKf 2017 03 04.45244 10 03 08.59 +02 55 12.9 24.2i 17DO177 T09 C~8HKf 2017 03 04.47432 10 03 08.46 +02 55 13.5 24.4i 17DO177 T09 C~8HKf 2017 03 04.49602 10 03 08.33 +02 55 14.1 24.7i 17DO177 T09 C~8HKf 2017 03 22.28126 10 01 35.07 +03 04 21.8 24.9g 17DO177 T09 C~8HKf 2017 03 22.29509 10 01 35.01 +03 04 22.5 25.3g 17DO177 T09 C~8HKf 2017 03 22.48627 10 01 34.09 +03 04 28.0 24.5z 17DO177 T09 C~8HKf 2017 03 25.24382 10 01 21.35 +03 05 51.4 24.6r 17DO177 T09 C~8HKf 2017 03 25.25752 10 01 21.27 +03 05 52.0 25.0r 17DO177 T09 C~8HKf 2017 03 25.27122 10 01 21.22 +03 05 52.4 24.6r 17DO177 T09 C~8HKf 2017 03 25.28496 10 01 21.17 +03 05 52.9 24.9r 17DO177 T09 C~8HKf
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 -0.05 0.00 -0.02
2 0.0001 -2.87 0.05 -0.45 0.02
3 0.0002 -5.71 -0.03 -0.99 -0.07
4 0.0792 -2535.61 -0.06 -247.48 0.18
5 0.0793 -2537.75 0.20 -247.76 0.03
6 0.0794 -2542.21 0.22 -247.84 0.19
7 0.0846 -2718.92 0.20 -256.26 -0.18
8 0.0850 -2733.30 -0.35 -256.77 -0.04
9 0.0851 -2734.25 -0.02 -256.81 -0.02
10 0.1092 -3538.88 -0.03 -280.08 -0.10
11 0.1092 -3541.34 -0.16 -279.94 0.09
12 0.1093 -3543.62 -0.10 -280.27 -0.19
13 0.1096 -3553.76 0.05 -280.14 0.15
14 0.1097 -3555.79 0.02 -280.27 0.07
15 0.1097 -3557.83 -0.03 -280.39 -0.02
16 0.1584 -5058.89 0.02 -261.46 -0.26
17 0.1585 -5059.97 0.01 -261.12 0.04
18 0.1590 -5074.82 0.17 -260.84 -0.23
19 0.1665 -5282.93 0.06 -250.18 -0.05
20 0.1666 -5284.26 -0.24 -250.04 0.04
21 0.1666 -5285.10 -0.05 -249.93 0.10
22 0.1666 -5285.98 0.11 -249.73 0.26
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.
17DO177 quality flag:1 Type: 4:3E SCATNEAR CENTAURS axisobj 36.627 37.595 35.732 ecceobj 0.128 0.157 0.106 incobj 14.724 14.613 14.866 qmin 31.413 31.369 29.059 qmax 41.783 44.475 42.441 amean 36.478 37.694 35.835 amin 36.124 37.244 35.225 amax 36.869 38.174 36.473 emean 0.108 0.107 0.092 emin 0.081 0.047 0.023 emax 0.136 0.169 0.181 imean 16.441 19.681 17.706 imin 14.844 16.145 15.202 imax 17.825 22.103 20.057 excite_mean 0.303 0.354 0.319 fracstop 1.000 1.000 1.000 cjmean 2.924 2.889 2.911 libcent 0 178.3 -180.0 -180.0 libamp 0 91.3 -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 180.2 178.1 185.9 kozaiamp 180.0 180.0 180.0