Orbit Fit and Astrometric record for 11SR250

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: 11SR250   
# Created Fri Dec  3 02:11:12 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     42 observations of     42
# Arc:   3.22y
# First observation: 2009/07/16
#  Last observation: 2012/10/04
# Chi-squared of fit:    44.20 DOF:     78 RMS:  0.18
# Min/Max residuals:    -0.48    0.49
# Exact a, adot, b, bdot, g, gdot:
  4.495854E-05  4.821864E-01  5.442893E-06  7.207586E-02  1.721920E-01  1.213802E-02
# Covariance matrix:
  7.3345E-13 -1.5422E-12  7.0510E-15 -1.7551E-13  3.1628E-13 -1.3463E-12
 -1.5422E-12  2.4686E-11 -1.4330E-13  3.4208E-12 -2.6015E-12  2.5744E-11
  7.0510E-15 -1.4330E-13  6.7221E-13 -4.1823E-13  2.1587E-14 -1.5697E-13
 -1.7551E-13  3.4208E-12 -4.1823E-13  1.0882E-12 -6.9444E-13  3.8621E-12
  3.1628E-13 -2.6015E-12  2.1587E-14 -6.9444E-13  5.0814E-12 -5.8599E-12
 -1.3463E-12  2.5744E-11 -1.5697E-13  3.8621E-12 -5.8599E-12  2.9472E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.276675  -61.841876    0.075578   -0.057696   -1.007209  2455028.990916
# Heliocentric elements and errors
Epoch:              2455028.5000  =  2009/07/16
Mean Anomaly:            1.24350 +/-     0.001
Argument of Peri:      338.56233 +/-     0.000
Long of Asc Node:      315.67119 +/-     0.000
Inclination:             8.89413 +/-     0.000
Eccentricity:         0.38823754 +/-    0.0000
Semi-Major Axis:     11.14378980 +/-    0.0000
Time of Perihelion: 2454981.5655 +/-       0.0
Perihelion:           6.81735225 +/-    0.0000
Aphelion:            15.47022735 +/-    0.0000
Period (y)               37.2013 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            3.14890935 +/-    0.0000
Ecliptic Y           -6.04056464 +/-    0.0000
Ecliptic Z           -0.33186798 +/-    0.0000
Ecliptic XDOT         0.00688568 +/-    0.0000
Ecliptic YDOT         0.00339496 +/-    0.0000
Ecliptic ZDOT         0.00113301 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.82012722 +/-    0.0000
Geocenter to KBO      5.80749186 +/-    0.0000
# Hcoef: 12.64

The following table shows the complete astrometric record for 11SR250. 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 (11SR250) followed by the observatory code and reference code for the source of the astrometry.

2009 07  16.49015  20 03 54.29   -23 44 19.6   20.3i 11SR250   F51  C~4qFj      
2009 07  16.49989  20 03 54.07   -23 44 19.9   20.5i 11SR250   F51  C~4qFj      
2010 08  05.49080  21 40 56.36   -12 42 43.8   20.9r 11SR250   F51  C~4qFj      
2010 08  05.50119  21 40 56.13   -12 42 44.5   20.8r 11SR250   F51  C~4qFj      
2010 08  31.41266  21 31 38.26   -13 11 31.8   20.5i 11SR250   F51  C~4qFj      
2010 08  31.42370  21 31 38.02   -13 11 32.5   20.7i 11SR250   F51  C~4qFj      
2010 08  31.43917  21 31 37.73   -13 11 33.6   21.1r 11SR250   F51  C~4qFj      
2010 08  31.45042  21 31 37.50   -13 11 34.2   21.2r 11SR250   F51  C~4qFj      
2010 09  02.19556  21 31 02.85   -13 13 20.7   21.2V 11SR250   G96  C~4qFj      
2010 09  02.20185  21 31 02.74   -13 13 21.1   21.5V 11SR250   G96  C~4qFj      
2010 09  02.20819  21 31 02.56   -13 13 21.2   20.8V 11SR250   G96  C~4qFj      
2010 09  02.21450  21 31 02.42   -13 13 21.7   21.2V 11SR250   G96  C~4qFj      
2011 06  30.60385  23 09 40.01   -01 03 14.8   21.3z 11SR250   F51  C~4qFj      
2011 06  30.61582  23 09 40.01   -01 03 13.7         11SR250   F51  C~4qFj      
2011 08  20.48232  23 00 37.61   -01 10 23.8   21.6r 11SR250   F51  C~4qFj      
2011 08  20.49313  23 00 37.41   -01 10 24.7   21.5r 11SR250   F51  C~4qFj      
2011 08  20.50460  23 00 37.16   -01 10 25.5   21.3i 11SR250   F51  C~4qFj      
2011 08  20.51621  23 00 36.95   -01 10 26.2         11SR250   F51  C~4qFj      
2011 08  23.46910  22 59 40.29   -01 14 08.9   21.7g 11SR250   F51  C~4qFj      
2011 08  23.48016  22 59 40.05   -01 14 10.0   21.6g 11SR250   F51  C~4qFj      
2011 08  23.53665  22 59 38.92   -01 14 14.2   21.2r 11SR250   F51  C~4qFj      
2011 08  23.54702  22 59 38.70   -01 14 14.8   21.5r 11SR250   F51  C~4qFj      
2011 08  31.47652  22 57 00.72   -01 25 22.0   21.5g 11SR250   F51  C~4qFj      
2011 08  31.48773  22 57 00.48   -01 25 22.6   21.7g 11SR250   F51  C~4qFj      
2011 09  04.54556  22 55 37.94   -01 31 34.1   21.0i 11SR250   F51  C~4qFj      
2011 09  04.55702  22 55 37.72   -01 31 35.2   21.1i 11SR250   F51  C~4qFj      
2011 09  20.33648  22 50 23.944  -01 57 09.14  22.0w 11SR250   F51  C~0a05      
2011 09  20.35158  22 50 23.642  -01 57 10.71  21.8w 11SR250   F51  C~0a05      
2011 09  20.36677  22 50 23.352  -01 57 12.19  21.7w 11SR250   F51  C~0a05      
2011 09  20.38199  22 50 23.048  -01 57 13.71  22.0w 11SR250   F51  C~0a05      
2011 09  21.515122 22 50 01.668  -01 59 04.55  20.7R 11SR250   568  C~0a05      
2011 09  21.570922 22 50 00.609  -01 59 09.84  20.5R 11SR250   568  C~0a05      
2011 10  28.231113 22 42 06.533  -02 45 43.11  21.2R 11SR250   568  C~0a05      
2011 10  28.237070 22 42 06.500  -02 45 43.33  21.2R 11SR250   568  C~0a05      
2011 10  28.238320 22 42 06.494  -02 45 43.40  21.2R 11SR250   568  C~0a05      
2011 10  28.239575 22 42 06.484  -02 45 43.48  21.1R 11SR250   568  C~0a05      
2011 10  28.290906 22 42 06.179  -02 45 45.69  21.2R 11SR250   568  C~0a05      
2011 10  28.366672 22 42 05.728  -02 45 48.78  21.0R 11SR250   568  C~0a05      
2011 10  28.367921 22 42 05.716  -02 45 48.84  21.1R 11SR250   568  C~0a05      
2011 10  28.369174 22 42 05.717  -02 45 48.91  21.2R 11SR250   568  C~0a05      
2012 10  04.46636  23 55 53.05   +07 42 07.8   21.4i 11SR250   F51  C~4qFj      
2012 10  04.47869  23 55 52.83   +07 42 06.5   21.6i 11SR250   F51  C~4qFj      

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    -0.20       0.00     0.21
     2   0.0000      0.00     0.08       0.00     0.19
     3   1.0541      0.00     0.43       0.00     0.04
     4   1.0541      0.00     0.41       0.00     0.01
     5   1.1250      0.00    -0.21       0.00    -0.01
     6   1.1251      0.00    -0.39       0.00    -0.04
     7   1.1251      0.00     0.06       0.00    -0.19
     8   1.1251      0.00     0.09       0.00    -0.11
     9   1.1299      0.00     0.24       0.00    -0.30
    10   1.1299      0.00     0.49       0.00    -0.32
    11   1.1300      0.00    -0.29       0.00    -0.03
    12   1.1300      0.00    -0.48       0.00    -0.15
    13   1.9551      0.00    -0.19       0.00    -0.04
    14   1.9552      0.00    -0.12       0.00     0.28
    15   2.0944      0.00     0.06       0.00    -0.00
    16   2.0945      0.00     0.22       0.00    -0.12
    17   2.0945      0.00    -0.18       0.00    -0.08
    18   2.0945      0.00     0.06       0.00     0.06
    19   2.1026      0.00     0.40       0.00    -0.03
    20   2.1026      0.00     0.11       0.00    -0.27
    21   2.1028      0.00     0.07       0.00    -0.06
    22   2.1028      0.00    -0.13       0.00     0.15
    23   2.1245      0.00    -0.28       0.00    -0.08
    24   2.1246      0.00    -0.39       0.00     0.32
    25   2.1357      0.00    -0.15       0.00     0.19
    26   2.1357      0.00     0.12       0.00     0.16
    27   2.1789      0.00     0.03       0.00     0.10
    28   2.1789      0.00    -0.10       0.00     0.01
    29   2.1790      0.00    -0.02       0.00     0.02
    30   2.1790      0.00    -0.14       0.00    -0.01
    31   2.1821      0.00    -0.06       0.00     0.02
    32   2.1823      0.00    -0.05       0.00     0.17
    33   2.2827      0.00    -0.01       0.00     0.03
    34   2.2827      0.00     0.03       0.00     0.06
    35   2.2827      0.00     0.06       0.00     0.04
    36   2.2827      0.00     0.02       0.00     0.01
    37   2.2828      0.00     0.05       0.00    -0.03
    38   2.2830      0.00     0.02       0.00     0.05
    39   2.2830      0.00    -0.05       0.00     0.05
    40   2.2830      0.00     0.07       0.00     0.03
    41   3.2196      0.00    -0.04       0.00    -0.22
    42   3.2197      0.00     0.15       0.00    -0.13

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.

11SR250    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        10.895    10.895    10.896
ecceobj         0.374     0.374     0.374
incobj          8.874     8.874     8.874
qmin            6.663     6.279     5.708
qmax           16.313    20.667    15.677
amean          10.815    11.851    10.011
amin           10.330    10.485     7.534
amax           11.840    13.552    11.171
emean           0.365     0.430     0.352
emin            0.348     0.346     0.242
emax            0.387     0.525     0.404
imean          11.770    12.211    11.515
imin           10.226    10.230    10.222
imax           14.944    15.360    14.023
excite_mean     0.418     0.480     0.407
fracstop        0.001     0.003     0.001
cjmean          3.883     3.655     4.102

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       128.5     172.5     128.8
kozaiamp        171.1     175.1     171.7