Orbit Fit and Astrometric record for 08AQ118

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: 08AQ118   
# Created Mon Dec 11 02:37:36 2017
# Orbit generated from Bernstein formalism
# Fitting   58 observations of   64
# Arc:  11.80y
# First observation: 2003/04/26
#  Last observation: 2015/02/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.002899   0.025504   0.000722  -0.011511   0.029273   0.000000
# WARNING -- MRQMIN stopped after  23 iterations
# Chi-squared of fit:    48.36 DOF:  110 RMS:  0.16
# Min/Max residuals:    -0.48    0.40
# Exact a, adot, b, bdot, g, gdot:
  1.499424E-05  2.394946E-02 -7.648629E-06 -1.075391E-02  2.547927E-02 -1.321877E-03
# Covariance matrix:
  2.8265E-13 -6.0641E-14 -2.8885E-14  1.8559E-14 -5.1175E-14 -1.3110E-13
 -6.0641E-14  2.6318E-14  1.6475E-14 -1.0359E-14  1.1447E-14  7.2429E-14
 -2.8885E-14  1.6475E-14  2.0669E-13 -2.5567E-14  8.5851E-15  4.9189E-14
  1.8559E-14 -1.0359E-14 -2.5567E-14  6.4207E-15 -6.2722E-15 -3.1089E-14
 -5.1175E-14  1.1447E-14  8.5851E-15 -6.2722E-15  7.4318E-14  4.6781E-14
 -1.3110E-13  7.2429E-14  4.9189E-14 -3.1089E-14  4.6781E-14  2.1791E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    4.063476  122.027377   -1.004861   -0.004577    0.064379  2452755.616558
# Heliocentric elements and errors
Epoch:              2452750.5000  =  2003/04/21
Mean Anomaly:          338.01345 +/-     0.016
Argument of Peri:      195.27721 +/-     0.018
Long of Asc Node:      312.47316 +/-     0.000
Inclination:            24.51183 +/-     0.000
Eccentricity:         0.06785418 +/-    0.0000
Semi-Major Axis:     41.80160382 +/-    0.0019
Time of Perihelion: 2458779.4592 +/-       4.3
Perihelion:          38.96519036 +/-    0.0022
Aphelion:            44.63801728 +/-    0.0024
Period (y)              270.2699 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -21.58195465 +/-    0.0002
Ecliptic Y           32.60660366 +/-    0.0004
Ecliptic Z            2.78086895 +/-    0.0000
Ecliptic XDOT        -0.00215622 +/-    0.0000
Ecliptic YDOT        -0.00142039 +/-    0.0000
Ecliptic ZDOT        -0.00116252 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.20082398 +/-    0.0003
Geocenter to KBO     39.24758680 +/-    0.0004
# Hcoef:  5.87

The following table shows the complete astrometric record for 08AQ118. 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 (08AQ118) followed by the observatory code and reference code for the source of the astrometry.

2003 04  26.115815 08 21 07.03   +23 39 56.6         08AQ118   645  C~1vVo      
2003 04  26.116645 08 21 07.03   +23 39 56.6         08AQ118   645  C~1vVo      
2003 04  26.119132 08 21 07.03   +23 39 56.6         08AQ118   645  C~1vVo      
2004 03  18.233106 08 27 02.65   +22 49 32.4         08AQ118   645  C~1vVo      
2004 03  18.233935 08 27 02.65   +22 49 32.4         08AQ118   645  C~1vVo      
2004 03  18.236423 08 27 02.64   +22 49 32.4         08AQ118   645  C~1vVo      
2008 01  06.36213  08 53 31.29   +18 41 30.2   22.0r 08AQ118   568  Cz6782      
2008 01  06.42852  08 53 30.96   +18 41 31.1   21.9r 08AQ118   568  Cz6782      
2008 01  06.45745  08 53 30.82   +18 41 31.6   21.8r 08AQ118   568  Cz6782      
2008 01  07.57030  08 53 25.26   +18 41 47.4   21.9r 08AQ118   568  Cz6782      
2011 01  30.34260  09 06 08.461  +15 44 30.71  21.7w 08AQ118   F51  C~1vVo      
2011 01  30.35715  09 06 08.385  +15 44 30.84  21.7w 08AQ118   F51  C~1vVo      
2011 01  30.37278  09 06 08.306  +15 44 31.08  21.7w 08AQ118   F51  C~1vVo      
2011 01  30.38731  09 06 08.220  +15 44 31.34  21.6w 08AQ118   F51  C~1vVo      
2013 02  03.34725  09 15 23.177  +13 41 18.01  21.7w 08AQ118   F51  C~1vVo      
2013 02  03.36187  09 15 23.089  +13 41 18.23  21.6w 08AQ118   F51  C~1vVo      
2013 02  03.37660  09 15 23.014  +13 41 18.51  21.7w 08AQ118   F51  C~1vVp      
2013 02  03.39121  09 15 22.928  +13 41 18.84  21.8w 08AQ118   F51  C~1vVp      
2013 03  03.25893  09 12 57.958  +13 49 32.38  21.8w 08AQ118   F51  C~1vVp      
2013 03  03.27323  09 12 57.888  +13 49 32.65  21.8w 08AQ118   F51  C~1vVp      
2013 03  03.28764  09 12 57.836  +13 49 32.66  21.8w 08AQ118   F51  C~1vVp      
2013 03  03.30199  09 12 57.760  +13 49 33.04  21.8w 08AQ118   F51  C~1vVp      
2014 01  05.43664  09 22 35.438  +12 30 58.62  22.0w 08AQ118   F51  C~1vVp      
2014 01  05.45176  09 22 35.367  +12 30 58.87  22.2w 08AQ118   F51  C~1vVp      
2014 01  05.46693  09 22 35.290  +12 30 58.81  22.1w 08AQ118   F51  C~1vVp      
2014 01  05.48210  09 22 35.223  +12 30 59.02  22.0w 08AQ118   F51  C~1vVp      
2014 01  25.39154  09 20 58.718  +12 35 43.67  21.8w 08AQ118   F51  C~1vVp      
2014 01  25.40309  09 20 58.641  +12 35 43.92  21.8w 08AQ118   F51  C~1vVp      
2014 01  25.42613  09 20 58.525  +12 35 44.23  22.1w 08AQ118   F51  C~1vVp      
2014 02  04.10097  09 20 07.156  +12 38 34.94  21.4R 08AQ118   809  C@0621      
2014 02  04.19197  09 20 06.661  +12 38 36.78  21.5R 08AQ118   809  C@0621      
2014 02  04.30977  09 20 05.999  +12 38 38.65  21.3R 08AQ118   809  C@0621      
2014 02  05.10524  09 20 01.802  +12 38 53.52  21.3R 08AQ118   809  C@0621      
2014 02  05.22818  09 20 01.124  +12 38 55.64  21.2R 08AQ118   809  C@0621      
2014 02  28.30193  09 18 00.269  +12 46 01.25  21.6w 08AQ118   F51  C~1vVp      
2014 02  28.31491  09 18 00.192  +12 46 01.48  21.8w 08AQ118   F51  C~1vVp      
2014 02  28.32798  09 18 00.147  +12 46 01.86  21.9w 08AQ118   F51  C~1vVp      
2014 02  28.34114  09 18 00.081  +12 46 01.88  21.7w 08AQ118   F51  C~1vVp      
2014 03  20.25975  09 16 32.684  +12 51 23.31  21.8w 08AQ118   F51  C~1vVp      
2014 03  20.27162  09 16 32.635  +12 51 23.52  21.7w 08AQ118   F51  C~1vVp      
2014 03  20.29687  09 16 32.535  +12 51 23.78  21.5w 08AQ118   F51  C~1vVp      
2014 03  24.24250  09 16 18.305  +12 52 15.91  22.0w 08AQ118   F51  C~1vVp      
2014 03  24.25404  09 16 18.274  +12 52 16.22  21.9w 08AQ118   F51  C~1vVp      
2014 03  24.26564  09 16 18.246  +12 52 16.43  22.0w 08AQ118   F51  C~1vVp      
2014 03  24.27727  09 16 18.214  +12 52 16.55  21.8w 08AQ118   F51  C~1vVp      
2014 05  25.26154  09 15 42.410  +12 52 46.88  21.9w 08AQ118   F51  C~1vVp      
2014 05  25.26617  09 15 42.407  +12 52 47.29  22.1w 08AQ118   F51  C~1vVp      
2014 05  25.27082  09 15 42.419  +12 52 46.78  21.9w 08AQ118   F51  C~1vVp      
2014 05  25.27545  09 15 42.426  +12 52 47.21  22.0w 08AQ118   F51  C~1vVp      
2014 11  26.54636  09 29 04.037  +11 26 46.59  22.1w 08AQ118   F51  C~1vVp      
2014 11  26.55761  09 29 04.048  +11 26 46.21  22.0w 08AQ118   F51  C~1vVp      
2014 11  26.56887  09 29 04.049  +11 26 46.36  21.7w 08AQ118   F51  C~1vVp      
2014 11  26.58008  09 29 04.028  +11 26 46.03  21.9w 08AQ118   F51  C~1vVp      
2014 12  18.51333  09 28 23.513  +11 25 47.85  21.8w 08AQ118   F51  C~1vVp      
2014 12  18.52574  09 28 23.479  +11 25 48.18  21.8w 08AQ118   F51  C~1vVp      
2014 12  18.53666  09 28 23.457  +11 25 48.15  21.7w 08AQ118   F51  C~1vVp      
2014 12  18.54765  09 28 23.417  +11 25 48.48  21.9w 08AQ118   F51  C~1vVp      
2015 01  20.54268  09 26 08.847  +11 31 06.20  22.0w 08AQ118   F51  C~1vVp      
2015 01  20.55527  09 26 08.780  +11 31 06.42  21.8w 08AQ118   F51  C~1vVp      
2015 01  20.56784  09 26 08.711  +11 31 06.64  21.8w 08AQ118   F51  C~1vVp      
2015 01  20.58057  09 26 08.646  +11 31 06.88  21.9w 08AQ118   F51  C~1vVp      
2015 02  13.34263  09 24 03.747  +11 38 08.04  21.8w 08AQ118   F51  C~1vVp      
2015 02  13.35471  09 24 03.686  +11 38 08.21  21.8w 08AQ118   F51  C~1vVp      
2015 02  13.36683  09 24 03.599  +11 38 08.69  21.9w 08AQ118   F51  C~1vVp      

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    -0.03       0.00     0.20
  2   0.0000      0.00    -0.04       0.00     0.21
  3   0.0000      0.00    -0.08       0.00     0.24
  4   0.8956   5476.62     0.13   -1786.39     0.12
  5   0.8956   5476.62     0.16   -1786.39     0.13
  6   0.8956   5476.48     0.13   -1786.43     0.12
  7   4.6988  31118.87    -0.06  -10429.51    -0.39
  8   4.6990  31114.01     0.01  -10429.95    -0.43
  9   4.6991  31111.91     0.07  -10430.02    -0.33
 10   4.7021  31029.75     0.03  -10436.73    -0.48
 11   7.7652  45100.94    -0.26  -17723.50     0.13
 12   7.7652  45099.80    -0.16  -17723.70     0.03
 13   7.7652  45098.58    -0.04  -17723.80     0.03
 14   7.7653  45097.25    -0.12  -17723.90     0.02
 15   9.7775  55687.86     0.08  -22669.95     0.12
 16   9.7775  55686.47    -0.02  -22670.12     0.04
 17   9.7776  55685.26     0.06  -22670.17     0.08
 18   9.7776  55683.86    -0.04  -22670.22     0.12
 19   9.8539  53359.85    -0.25  -22814.28    -0.08
 20   9.8540  53358.72    -0.27  -22814.31    -0.05
 21   9.8540  53357.95     0.06  -22814.53    -0.21
 22   9.8540  53356.69    -0.09  -22814.48    -0.09
 23  10.6977  63690.29     0.12  -24979.16     0.05
 24  10.6977  63689.12     0.03  -24979.23     0.11
 25  10.6977  63687.96    -0.03  -24979.64    -0.18
 26  10.6978  63686.87    -0.04  -24979.73    -0.14
 27  10.7523  62115.10     0.07  -25130.48     0.00
 28  10.7523  62113.84    -0.19  -25130.57    -0.01
 29  10.7524  62111.96    -0.06  -25130.78    -0.07
 30  10.7789  61271.12 (   0.53) -25190.35 (   1.02)
 31  10.7791  61262.96 (   0.48) -25190.72 (   1.20)
 32  10.7794  61252.25 (   0.28) -25191.82 (   0.84)
 33  10.7816  61183.31 (   1.11) -25195.71 (   1.50)
 34  10.7820  61172.27 (   1.05) -25196.63 (   1.33)
 35  10.8451  59193.42     0.09  -25309.02     0.01
 36  10.8452  59192.18    -0.09  -25309.13    -0.05
 37  10.8452  59191.37     0.17  -25308.94     0.18
 38  10.8452  59190.36     0.24  -25309.22    -0.03
 39  10.8998  57760.96    -0.08  -25373.91     0.08
 40  10.8998  57760.15    -0.14  -25373.91     0.11
 41  10.8999  57758.56    -0.16  -25374.09     0.00
 42  10.9107  57526.40    -0.28  -25384.61    -0.33
 43  10.9107  57525.82    -0.19  -25384.44    -0.12
 44  10.9107  57525.33    -0.01  -25384.35    -0.00
 45  10.9108  57524.81     0.14  -25384.37     0.01
 46  11.0805  56976.06     0.40  -25512.24    -0.31
 47  11.0805  56975.88     0.02  -25511.84     0.10
 48  11.0805  56976.23     0.19  -25512.30    -0.34
 49  11.0805  56976.19    -0.04  -25511.84     0.13
 50  11.5878  71112.65    -0.33  -27110.45     0.20
 51  11.5878  71112.97     0.10  -27110.79     0.00
 52  11.5878  71112.93     0.17  -27110.63     0.30
 53  11.5879  71112.73     0.08  -27111.07    -0.00
 54  11.6479  70502.90     0.02  -27360.41    -0.05
 55  11.6479  70502.24    -0.05  -27360.23     0.27
 56  11.6480  70501.91     0.14  -27360.37     0.25
 57  11.6480  70501.16 (  -0.09) -27360.21 (   0.52)
 58  11.7383  68290.17     0.18  -27659.72    -0.04
 59  11.7384  68289.05     0.13  -27659.80    -0.03
 60  11.7384  68287.90     0.04  -27659.90    -0.02
 61  11.7384  68286.80     0.02  -27659.95     0.02
 62  11.8035  66199.93     0.09  -27803.39     0.10
 63  11.8035  66198.92     0.18  -27803.49     0.06
 64  11.8036  66197.41    -0.24  -27803.40     0.21

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.

08AQ118    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        41.589    41.594    41.583
ecceobj         0.062     0.062     0.062
incobj         24.586    24.586    24.586
qmin           38.207    38.214    38.196
qmax           45.119    45.090    45.067
amean          41.561    41.567    41.556
amin           41.245    41.254    41.235
amax           41.902    41.896    41.885
emean           0.065     0.065     0.065
emin            0.053     0.054     0.053
emax            0.077     0.077     0.077
imean          25.926    25.925    25.926
imin           25.551    25.550    25.553
imax           26.295    26.305    26.294
excite_mean     0.442     0.442     0.442
fracstop        1.000     1.000     1.000
cjmean          2.833     2.833     2.833

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       192.6     192.8     192.6
kozaiamp        180.0     179.9     180.0