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: 06QT180
# Created Mon Apr 28 01:08:58 2025
# Orbit generated from Bernstein formalism
# Fitting 18 observations of 19
# Arc: 1.12y
# First observation: 2005/07/07
# Last observation: 2006/08/22
Preliminary a, adot, b, bdot, g, gdot:
-0.000231 0.037268 0.000030 -0.014345 0.029352 0.000000
# Chi-squared of fit: 19.08 DOF: 30 RMS: 0.18
# Min/Max residuals: -0.33 0.44
# Exact a, adot, b, bdot, g, gdot:
2.021262E-05 3.763269E-02 -8.761587E-06 -1.446267E-02 3.016192E-02 4.696730E-03
# Covariance matrix:
3.2697E-13 5.1419E-13 4.0983E-14 -3.9007E-13 4.7944E-13 2.4256E-11
5.1419E-13 1.1021E-11 5.4024E-13 -5.2626E-12 4.8958E-12 3.2755E-10
4.0983E-14 5.4024E-13 2.3946E-13 -5.0242E-13 2.5576E-13 1.6751E-11
-3.9007E-13 -5.2626E-12 -5.0242E-13 3.0431E-12 -2.4718E-12 -1.6301E-10
4.7944E-13 4.8958E-12 2.5576E-13 -2.4718E-12 2.5498E-12 1.5380E-10
2.4256E-11 3.2755E-10 1.6751E-11 -1.6301E-10 1.5380E-10 1.0145E-08
# lat0 lon0 xBary yBary zBary JD0
1.745172 -59.230478 0.266583 0.029962 -0.980868 2453558.927533
# Heliocentric elements and errors
Epoch: 2453550.5000 = 2005/06/29
Mean Anomaly: 3.93964 +/- 0.079
Argument of Peri: 157.79118 +/- 0.365
Long of Asc Node: 124.72099 +/- 0.000
Inclination: 21.06617 +/- 0.001
Eccentricity: 0.57192781 +/- 0.0013
Semi-Major Axis: 78.40012511 +/- 0.1691
Time of Perihelion: 2450775.7251 +/- 55.1
Perihelion: 33.56091310 +/- 0.1222
Aphelion: 123.23933712 +/- 0.2834
Period (y) 694.1980 +/- 2.25
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X 17.22276812 +/- 0.0009
Ecliptic Y -29.45436606 +/- 0.0015
Ecliptic Z 1.00944123 +/- 0.0001
Ecliptic XDOT 0.00317484 +/- 0.0000
Ecliptic YDOT 0.00134011 +/- 0.0000
Ecliptic ZDOT -0.00129917 +/- 0.0000
# Distances at JD0 (AU)
Heliocenter to KBO 34.13506106 +/- 0.0014
Geocenter to KBO 33.15438632 +/- 0.0018
# Hcoef: 7.18
The following table shows the complete astrometric record for 06QT180. 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 (06QT180) followed by the observatory code and reference code for the source of the astrometry.
2005 07 07.42679 20 10 20.06 -18 16 52.8 23.5g 06QT180 568 C~63Rc 2005 07 07.45332 20 10 19.90 -18 16 53.5 23.0g 06QT180 568 C~63Rc 2005 07 07.47988 20 10 19.76 -18 16 54.1 23.3g 06QT180 568 C~63Rc 2005 07 08.440178 20 10 14.62 -18 17 18.0 06QT180 T14 C~63Rc 2005 09 27.220394 20 04 18.16 -18 48 12.5 06QT180 T14 C~63Rc 2005 09 27.265709 20 04 18.10 -18 48 13.5 06QT180 T14 C~63Rc 2005 09 27.311901 20 04 18.03 -18 48 14.0 06QT180 T14 C~63Rc 2005 09 30.264056 20 04 14.53 -18 48 56.6 22.0i 06QT180 T14 C~63Rc 2005 09 30.310339 20 04 14.47 -18 48 57.2 06QT180 T14 C~63Rc 2006 04 26.357311 20 22 54.08 -18 18 27.2 22.8V 06QT180 807 C~63Rc 2006 04 27.368900 20 22 55.36 -18 18 28.8 06QT180 807 C~63Rc 2006 04 28.349590 20 22 56.49 -18 18 30.8 06QT180 807 C~63Rc 2006 07 19.392934 20 18 51.65 -18 41 49.2 22.3r 06QT180 T14 C~63Rc 2006 07 19.422671 20 18 51.48 -18 41 49.8 06QT180 T14 C~63Rc 2006 07 19.445403 20 18 51.34 -18 41 50.4 06QT180 T14 C~63Rc 2006 07 19.465842 20 18 51.22 -18 41 51.0 06QT180 T14 C~63Rc 2006 08 21.15642 20 15 54.27 -18 56 10.2 21.5R 06QT180 807 Cs5501 2006 08 21.24866 20 15 53.82 -18 56 11.8 06QT180 807 Cs5501 2006 08 22.15084 20 15 49.46 -18 56 34.7 06QT180 807 Cs5501
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 -0.10 0.00 0.24
2 0.0001 -2.38 -0.31 -0.20 0.24
3 0.0001 -4.45 -0.21 -0.35 0.26
4 0.0028 -81.08 0.44 -8.01 -0.33
5 0.2239 -5428.10 -0.00 -755.80 0.10
6 0.2241 -5429.14 0.02 -756.60 -0.24
7 0.2242 -5430.22 0.03 -756.89 -0.05
8 0.2323 -5487.67 0.11 -788.34 -0.28
9 0.2324 -5488.63 0.00 -788.76 -0.22
10 0.8020 10457.22 0.07 -2485.87 -0.10
11 0.8048 10474.63 0.08 -2491.65 0.20
12 0.8075 10489.87 0.12 -2497.33 0.42
13 1.0321 6772.95 -0.01 -3062.49 -0.21
14 1.0322 6770.46 0.02 -3062.53 -0.02
15 1.0322 6768.39 -0.13 -3062.67 0.02
16 1.0323 6766.59 -0.19 -3062.87 -0.02
17 1.1218 4123.48 0.01 -3337.48 -0.00
18 1.1220 4116.90 ( 0.26) -3337.62 ( 0.62)
19 1.1245 4051.47 0.05 -3346.22 -0.01
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.
06QT180 quality flag:3 Type: SCATNEAR SCATNEAR SCATNEAR axisobj 78.119 78.626 77.648 ecceobj 0.570 0.574 0.567 incobj 21.052 21.052 21.052 qmin 31.309 31.597 31.689 qmax 131.902 134.463 130.997 amean 78.430 78.065 78.238 amin 75.541 75.666 74.293 amax 82.579 83.865 82.521 emean 0.582 0.576 0.576 emin 0.561 0.553 0.541 emax 0.608 0.605 0.598 imean 18.020 18.679 18.468 imin 16.519 17.131 16.968 imax 19.750 20.321 20.118 excite_mean 0.660 0.660 0.658 fracstop 1.000 1.000 1.000 cjmean 2.879 2.878 2.884 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 194.4 191.9 185.3 kozaiamp 180.0 179.9 180.0