Orbit Fit and Astrometric record for 06QT180

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 Tue Apr  1 01:08:53 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