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: 17EV51
# Created Fri Nov 22 02:10:53 2024
# Orbit generated from Bernstein formalism
# Fitting 16 observations of 16
# Arc: 2.08y
# First observation: 2017/03/06
# Last observation: 2019/04/06
Preliminary a, adot, b, bdot, g, gdot:
-0.000005 0.021425 -0.000006 0.007552 0.023614 0.000000
# Chi-squared of fit: 8.12 DOF: 26 RMS: 0.13
# Min/Max residuals: -0.36 0.26
# Exact a, adot, b, bdot, g, gdot:
1.390411E-05 2.121576E-02 4.562848E-06 7.456984E-03 2.354912E-02 -3.878455E-03
# Covariance matrix:
3.9027E-13 1.1175E-12 -4.0110E-14 5.5482E-13 8.0363E-13 3.3782E-11
1.1175E-12 1.3865E-10 -4.3423E-12 6.5239E-11 3.5208E-11 3.9529E-09
-4.0110E-14 -4.3423E-12 3.1033E-13 -2.1314E-12 -1.1091E-12 -1.2387E-10
5.5482E-13 6.5239E-11 -2.1314E-12 3.0809E-11 1.6548E-11 1.8612E-09
8.0363E-13 3.5208E-11 -1.1091E-12 1.6548E-11 1.0151E-11 1.0030E-09
3.3782E-11 3.9529E-09 -1.2387E-10 1.8612E-09 1.0030E-09 1.1277E-07
# lat0 lon0 xBary yBary zBary JD0
6.750638 -165.760529 0.473639 0.102347 -0.863532 2457819.081181
# Heliocentric elements and errors
Epoch: 2457810.5000 = 2017/02/26
Mean Anomaly: 291.67707 +/- 0.940
Argument of Peri: 108.51104 +/- 0.406
Long of Asc Node: 175.50316 +/- 0.002
Inclination: 20.45755 +/- 0.002
Eccentricity: 0.18441105 +/- 0.0149
Semi-Major Axis: 44.96610097 +/- 0.2115
Time of Perihelion: 2478712.6151 +/- 247.0
Perihelion: 36.67385501 +/- 0.6904
Aphelion: 53.25834692 +/- 0.7139
Period (y) 301.5338 +/- 2.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.83679877 +/- 0.0055
Ecliptic Y -10.13252388 +/- 0.0014
Ecliptic Z 4.99184258 +/- 0.0007
Ecliptic XDOT 0.00114280 +/- 0.0000
Ecliptic YDOT -0.00226221 +/- 0.0000
Ecliptic ZDOT 0.00080787 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 43.33479277 +/- 0.0054
Geocenter to KBO 42.46443404 +/- 0.0057
# Hcoef: 8.24
The following table shows the complete astrometric record for 17EV51. 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 (17EV51) followed by the observatory code and reference code for the source of the astrometry.
2017 03 06.58038 13 02 52.09 +00 36 43.7 24.8r 17EV51 T09 C~7xU7 2017 03 06.60099 13 02 52.00 +00 36 44.4 24.8r 17EV51 T09 C~7xU7 2017 03 06.64589 13 02 51.85 +00 36 45.7 24.8r 17EV51 T09 C~7xU7 2017 03 29.44104 13 01 21.29 +00 49 12.1 24.0z 17EV51 T09 C~7xU7 2017 03 29.48393 13 01 21.10 +00 49 13.3 24.7z 17EV51 T09 C~7xU7 2017 03 29.56289 13 01 20.75 +00 49 15.5 25.4g 17EV51 T09 C~7xU7 2017 04 29.30398 12 59 11.66 +01 04 15.8 24.8z 17EV51 T09 C~7xU7 2017 04 29.34700 12 59 11.47 +01 04 17.0 24.6z 17EV51 T09 C~7xU7 2017 04 29.39587 12 59 11.31 +01 04 18.0 24.4z 17EV51 T09 C~7xU7 2019 04 03.507135 13 11 26.81 +00 42 35.7 17EV51 T09 C~81By 2019 04 03.523270 13 11 26.75 +00 42 36.2 23.5i 17EV51 T09 C~81By 2019 04 06.39405 13 11 14.34 +00 44 08.0 24.3i 17EV51 T09 C~81By 2019 04 06.42440 13 11 14.19 +00 44 09.2 24.0i 17EV51 T09 C~81By 2019 04 06.49817 13 11 13.87 +00 44 11.2 23.8i 17EV51 T09 C~81By 2019 04 06.53654 13 11 13.70 +00 44 12.5 24.2i 17EV51 T09 C~81By 2019 04 06.53921 13 11 13.69 +00 44 12.5 23.9i 17EV51 T09 C~81By
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 0.07 0.00 0.09
2 0.0001 -1.52 -0.16 0.13 0.04
3 0.0002 -4.09 0.07 0.46 -0.02
4 0.0626 -1545.17 -0.01 165.48 0.22
5 0.0627 -1548.27 0.01 165.49 0.02
6 0.0629 -1553.96 0.04 165.49 -0.36
7 0.1471 -3687.82 0.02 250.02 -0.02
8 0.1472 -3690.92 -0.30 250.03 -0.00
9 0.1473 -3693.52 0.26 250.03 0.01
10 2.0751 6990.17 -0.13 3304.57 -0.04
11 2.0751 6989.14 0.03 3304.68 0.00
12 2.0830 6781.75 0.14 3317.48 0.06
13 2.0831 6779.20 -0.17 3317.72 0.19
14 2.0833 6774.00 0.05 3317.71 -0.09
15 2.0834 6771.14 0.01 3317.93 -0.02
16 2.0834 6771.00 0.06 3317.87 -0.09
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.
17EV51 quality flag:3 Type: SCATEXTD SCATEXTD SCATEXTD axisobj 44.439 44.971 44.064 ecceobj 0.182 0.222 0.143 incobj 20.566 20.560 20.571 qmin 36.086 34.688 37.484 qmax 53.797 56.345 51.405 amean 44.696 45.257 44.312 amin 44.313 44.860 43.951 amax 45.146 45.737 44.729 emean 0.174 0.213 0.136 emin 0.159 0.196 0.121 emax 0.192 0.233 0.151 imean 20.423 20.492 20.357 imin 19.888 19.856 19.922 imax 20.985 21.141 20.789 excite_mean 0.390 0.410 0.374 fracstop 1.000 1.000 1.000 cjmean 2.922 2.909 2.933 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 188.3 189.9 185.4 kozaiamp 180.0 180.0 180.0