Orbit Fit and Astrometric record for 88269

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: 88269     
# Created Wed Dec 13 02:36:30 2017
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   19 observations of   19
# Arc:   4.94y
# First observation: 2001/05/22
#  Last observation: 2006/05/02
# Chi-squared of fit:   110.07 DOF:   32 RMS:  0.43
# Min/Max residuals:    -0.49    1.21
# Exact a, adot, b, bdot, g, gdot:
  2.321561E-05  6.411761E-02  5.021175E-07 -4.683485E-03  4.649719E-02 -1.436591E-02
# Covariance matrix:
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00  0.0000E+00
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.507937 -147.278165   -0.496408   -0.023525   -0.889444  2452052.484873
# Heliocentric elements and errors
Epoch:              2452052.5000  =  2001/05/23
Mean Anomaly:          315.81155 +/-     0.000
Argument of Peri:      266.73519 +/-     0.000
Long of Asc Node:       14.63315 +/-     0.000
Inclination:             4.36207 +/-     0.000
Eccentricity:         0.23571361 +/-    0.0000
Semi-Major Axis:     25.86771402 +/-    0.0000
Time of Perihelion: 2457951.0030 +/-       0.0
Perihelion:          19.77034183 +/-    0.0000
Aphelion:            31.96508622 +/-    0.0000
Period (y)              131.5665 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -18.56389885 +/-    0.0000
Ecliptic Y          -12.51530282 +/-    0.0000
Ecliptic Z           -0.56596378 +/-    0.0000
Ecliptic XDOT         0.00274993 +/-    0.0000
Ecliptic YDOT        -0.00271294 +/-    0.0000
Ecliptic ZDOT        -0.00025322 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   22.39588459 +/-    0.0000
Geocenter to KBO     21.50681733 +/-    0.0000
# Hcoef:  9.51

The following table shows the complete astrometric record for 88269. 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 (88269) followed by the observatory code and reference code for the source of the astrometry.

2001 05  22.98413  13 59 57.01   -13 49 58.7   23.2R 88269     807  Cd1817      
2001 05  23.08099  13 59 56.35   -13 49 55.3         88269     807  Cd1817      
2001 05  29.19891  13 59 15.99   -13 46 21.7   23.0R 88269     695  Cd1817      
2001 05  29.27459  13 59 15.53   -13 46 19.6         88269     695  Cd1817      
2001 06  09.00264  13 58 15.12   -13 40 53.4   22.1R 88269     304  Cd1817      
2001 06  09.05179  13 58 14.88   -13 40 52.1         88269     304  Cd1817      
2001 07  19.98530  13 56 59.39   -13 33 16.8         88269     309  Cd3323      
2001 07  20.01280  13 56 59.45   -13 33 17.0         88269     309  Cd3323      
2002 04  07.40800  14 20 18.26   -15 50 07.4   22.0R 88269     807  Cf4617      
2002 04  08.12888  14 20 12.65   -15 49 43.1         88269     807  Cf4617      
2002 04  08.21516  14 20 11.98   -15 49 40.2         88269     807  Cf4617      
2003 03  03.60741  14 38 25.88   -17 29 42.5         88269     568  Ch5853      
2003 03  03.64092  14 38 25.78   -17 29 42.1         88269     568  Ch5853      
2004 05  26.17962  14 43 36.66   -18 16 20.6   22.9R 88269     304  Ck8652      
2004 05  26.21205  14 43 36.40   -18 16 19.1         88269     304  Ck8652      
2006 05  02.42003  15 19 57.54   -21 16 59.5   22.5R 88269     250  S~06GW      
2006 05  02.42443  15 19 57.49   -21 16 59.3         88269     250  S~06GW      
2006 05  02.42883  15 19 57.45   -21 16 59.2         88269     250  S~06GW      
2006 05  02.43322  15 19 57.41   -21 16 59.1         88269     250  S~06GW      

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    -0.38       0.00     1.21
  2   0.0003      0.00    -0.03       0.00    -0.43
  3   0.0170      0.00    -0.04       0.00     0.04
  4   0.0172      0.00     0.35       0.00    -0.40
  5   0.0466      0.00    -0.08       0.00    -0.07
  6   0.0467      0.00     0.08       0.00    -0.10
  7   0.1588      0.00    -0.37       0.00    -0.32
  8   0.1589      0.00    -0.03       0.00    -0.34
  9   0.8745      0.00    -0.05       0.00     0.35
 10   0.8765      0.00     0.18       0.00    -0.08
 11   0.8767      0.00     0.51       0.00    -0.14
 12   1.7786      0.00     0.10       0.00     0.56
 13   1.7787      0.00     0.23       0.00     0.74
 14   3.0094      0.00     0.47       0.00     0.72
 15   3.0095      0.00     0.54       0.00     1.05
 16   4.9430      0.00     0.36       0.00    -0.49
 17   4.9430      0.00     0.20       0.00    -0.42
 18   4.9430      0.00     0.20       0.00    -0.44
 19   4.9431      0.00     0.20       0.00    -0.47

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.

88269    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        25.838    25.838    25.838
ecceobj         0.236     0.236     0.236
incobj          4.368     4.368     4.368
qmin           18.243    19.561    18.653
qmax           32.845    32.839    32.850
amean          23.425    26.103    25.738
amin           19.792    25.245    24.306
amax           26.540    26.645    26.535
emean           0.166     0.218     0.228
emin            0.060     0.173     0.211
emax            0.244     0.244     0.244
imean           6.637     6.445     6.085
imin            4.720     4.720     4.720
imax            7.232     8.620     7.577
excite_mean     0.206     0.247     0.252
fracstop        0.009     0.004     0.003
cjmean          3.020     2.957     2.959

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       185.4     302.5     300.5
kozaiamp        173.9      34.2      35.5