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: 17DA160
# Created Tue May 7 01:17:25 2024
# Orbit generated from Bernstein formalism
# Fitting 11 observations of 11
# Arc: 11.10d
# First observation: 2017/02/21
# Last observation: 2017/03/04
Preliminary a, adot, b, bdot, g, gdot:
0.000002 0.024640 -0.000001 -0.000654 0.024500 0.000000
# WARNING MRQMIN stopped after 13 iterations -- oscilliatory solution
# WARNING Fitting with energy constraint
# Chi-squared of fit: 12.50 DOF: 17 RMS: 0.19
# Min/Max residuals: -0.41 0.36
# Exact a, adot, b, bdot, g, gdot:
1.616404E-05 2.135238E-02 -1.204852E-06 -4.731348E-04 2.382853E-02 9.441272E-03
# Covariance matrix:
1.6135E-12 2.9401E-09 -1.7504E-13 -1.6394E-10 5.5914E-10 1.2435E-09
2.9401E-09 6.3445E-06 -3.7430E-10 -3.5268E-07 1.2004E-06 -7.4799E-07
-1.7504E-13 -3.7430E-10 2.5028E-13 1.1530E-11 -7.0904E-11 -6.9929E-11
-1.6394E-10 -3.5268E-07 1.1530E-11 2.0515E-08 -6.6736E-08 4.5998E-08
5.5914E-10 1.2004E-06 -7.0904E-11 -6.6736E-08 2.2724E-07 -2.8411E-08
1.2435E-09 -7.4799E-07 -6.9929E-11 4.5998E-08 -2.8411E-08 1.7971E-04
# lat0 lon0 xBary yBary zBary JD0
4.789812 -168.262322 0.624468 0.064107 -0.763234 2457806.040041
# Heliocentric elements and errors
Epoch: 2457800.5000 = 2017/02/16
Mean Anomaly: 61.20121 +/- 64.347
Argument of Peri: 356.75625 +/- 35.029
Long of Asc Node: 87.14756 +/- 2.911
Inclination: 4.84127 +/- 0.058
Eccentricity: 0.39162851 +/- 0.5266
Semi-Major Axis: 44.71635020 +/- 23.1002
Time of Perihelion: 2439232.9120 +/- 13194.4
Perihelion: 27.20415243 +/- 27.4235
Aphelion: 62.22854797 +/- 39.8493
Period (y) 299.0252 +/- 231.71
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X -41.82550623 +/- 0.8191
Ecliptic Y -8.05683054 +/- 0.1702
Ecliptic Z 3.50418099 +/- 0.0701
Ecliptic XDOT -0.00056061 +/- 0.0015
Ecliptic YDOT -0.00262954 +/- 0.0004
Ecliptic ZDOT 0.00003634 +/- 0.0001
# Distances at JD0 (AU)
Heliocenter to KBO 42.73832909 +/- 0.8023
Geocenter to KBO 41.96650666 +/- 0.8395
# Hcoef: 8.60
The following table shows the complete astrometric record for 17DA160. 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 (17DA160) followed by the observatory code and reference code for the source of the astrometry.
2017 02 21.53924 12 50 39.02 -00 13 50.7 24.9z 17DA160 T09 C~7ujK 2017 02 21.59034 12 50 38.88 -00 13 50.2 24.6z 17DA160 T09 C~7ujK 2017 02 21.60910 12 50 38.82 -00 13 49.5 24.5z 17DA160 T09 C~7ujK 2017 02 23.54701 12 50 32.52 -00 13 00.5 25.2r 17DA160 T09 C~7ujK 2017 02 23.57183 12 50 32.43 -00 12 59.5 24.8r 17DA160 T09 C~7ujK 2017 02 23.61428 12 50 32.29 -00 12 58.8 25.2r 17DA160 T09 C~7ujK 2017 02 23.64611 12 50 32.17 -00 12 57.9 25.4r 17DA160 T09 C~7ujK 2017 02 23.65665 12 50 32.14 -00 12 57.8 25.5r 17DA160 T09 C~7ujK 2017 03 04.55785 12 50 00.45 -00 09 01.6 24.1y 17DA160 T09 C~7ujK 2017 03 04.59852 12 50 00.29 -00 09 00.4 24.0y 17DA160 T09 C~7ujK 2017 03 04.63649 12 50 00.12 -00 08 59.6 24.3y 17DA160 T09 C~7ujK
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 -0.41 0.00 0.18
2 0.0001 -2.13 0.27 -0.36 -0.37
3 0.0002 -3.23 0.19 -0.06 -0.15
4 0.0055 -109.35 0.10 8.26 0.05
5 0.0056 -110.98 -0.13 8.66 0.36
6 0.0057 -113.19 0.08 8.49 0.03
7 0.0058 -115.20 -0.13 8.61 0.04
8 0.0058 -115.65 0.02 8.53 -0.08
9 0.0302 -645.46 0.13 40.95 0.06
10 0.0303 -648.14 0.06 41.12 0.12
11 0.0304 -650.80 -0.18 40.86 -0.24
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.
17DA160 quality flag:0 Type: ERR2LARGE ERR2LARGE ERR2LARGE axisobj 0.000 0.000 0.000 ecceobj -1.000 -1.000 -1.000 incobj -1.000 -1.000 -1.000 qmin 0.000 0.000 0.000 qmax 0.000 0.000 0.000 amean 0.000 0.000 0.000 amin 0.000 0.000 0.000 amax 0.000 0.000 0.000 emean 0.000 0.000 0.000 emin 0.000 0.000 0.000 emax 0.000 0.000 0.000 imean 0.000 0.000 0.000 imin 0.000 0.000 0.000 imax 0.000 0.000 0.000 excite_mean 0.000 0.000 0.000 fracstop 0.000 0.000 0.000 cjmean 0.000 0.000 0.000 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 0.0 0.0 0.0 kozaiamp 0.0 0.0 0.0