Orbit Fit and Astrometric record for 09YT26

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: 09YT26    
# Created Fri Dec  3 02:10:52 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     75 observations of     75
# Arc:  10.80y
# First observation: 2009/12/09
#  Last observation: 2020/09/27
# Chi-squared of fit:    34.98 DOF:    144 RMS:  0.12
# Min/Max residuals:    -0.65    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.906200E-05  3.701421E-02  2.312850E-06  6.629525E-03  3.159057E-02 -1.436754E-03
# Covariance matrix:
  1.3610E-13 -4.4759E-14  9.8335E-15 -5.8313E-15 -2.0186E-14 -8.5219E-14
 -4.4759E-14  2.1698E-14 -5.8114E-15  3.4474E-15  1.3307E-14  5.0318E-14
  9.8335E-15 -5.8114E-15  8.2562E-14 -1.3122E-14 -3.5812E-15 -1.5158E-14
 -5.8313E-15  3.4474E-15 -1.3122E-14  2.9705E-15  2.1732E-15  8.9870E-15
 -2.0186E-14  1.3307E-14 -3.5812E-15  2.1732E-15  6.6856E-14  2.9085E-14
 -8.5219E-14  5.0318E-14 -1.5158E-14  8.9870E-15  2.9085E-14  1.3143E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    0.721392   89.300107    0.200947    0.012186   -0.966393  2455174.903126
# Heliocentric elements and errors
Epoch:              2455174.5000  =  2009/12/09
Mean Anomaly:          348.49653 +/-     0.003
Argument of Peri:       20.53747 +/-     0.004
Long of Asc Node:       85.04385 +/-     0.000
Inclination:            10.19164 +/-     0.000
Eccentricity:         0.17522107 +/-    0.0000
Semi-Major Axis:     39.30374202 +/-    0.0016
Time of Perihelion: 2458050.4131 +/-       5.3
Perihelion:          32.41689811 +/-    0.0016
Aphelion:            46.19058593 +/-    0.0021
Period (y)              246.4104 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            0.60245214 +/-    0.0000
Ecliptic Y           32.61104319 +/-    0.0003
Ecliptic Z            0.39859933 +/-    0.0000
Ecliptic XDOT        -0.00320607 +/-    0.0000
Ecliptic YDOT        -0.00008714 +/-    0.0000
Ecliptic ZDOT         0.00057287 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.61906840 +/-    0.0003
Geocenter to KBO     31.65507266 +/-    0.0003
# Hcoef:  6.62

The following table shows the complete astrometric record for 09YT26. 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 (09YT26) followed by the observatory code and reference code for the source of the astrometry.

2009 12  09.40236  05 56 55.915  +24 09 31.75  21.1G 09YT26    F51  C~344t      
2009 12  26.37379  05 55 01.183  +24 10 25.47  21.2G 09YT26    F51  C~344t      
2009 12  26.38456  05 55 01.117  +24 10 25.42  21.3G 09YT26    F51  C~344t      
2010 01  05.32285  05 53 55.142  +24 10 51.19  21.0G 09YT26    F51  C~344t      
2010 01  23.48439  05 52 06.960  +24 11 29.22  21.9G 09YT26    F51  C~344t      
2010 01  23.49383  05 52 06.905  +24 11 29.36  21.9G 09YT26    F51  C~344t      
2010 10  23.50722  06 10 02.675  +24 27 19.78  21.4G 09YT26    F51  C~344t      
2010 10  23.51854  06 10 02.661  +24 27 19.87  21.9G 09YT26    F51  C~344t      
2011 01  05.53429  06 03 14.137  +24 33 58.62  21.0G 09YT26    F51  C~344t      
2011 09  11.60305  06 18 47.489  +24 42 21.67  21.7G 09YT26    F51  C~344t      
2011 09  11.61520  06 18 47.547  +24 42 21.67  22.2G 09YT26    F51  C~344t      
2011 11  25.55737  06 17 07.881  +24 50 32.08  21.9G 09YT26    F51  C~344t      
2011 11  25.57253  06 17 07.804  +24 50 32.33  21.4G 09YT26    F51  C~344t      
2011 11  25.58781  06 17 07.713  +24 50 32.36  21.3G 09YT26    F51  C~344t      
2011 11  25.60241  06 17 07.629  +24 50 32.44  21.3G 09YT26    F51  C~344t      
2011 11  30.55775  06 16 38.807  +24 51 09.01  21.5G 09YT26    F51  C~344t      
2011 11  30.57083  06 16 38.727  +24 51 09.39  22.0G 09YT26    F51  C~344t      
2011 12  05.38997  06 16 09.144  +24 51 44.01  21.3G 09YT26    F51  C~344t      
2011 12  05.40558  06 16 09.057  +24 51 44.29  21.4G 09YT26    F51  C~344t      
2013 03  03.34422  06 17 39.843  +25 17 20.35  21.7G 09YT26    F51  C~344t      
2013 03  03.35692  06 17 39.821  +25 17 20.40  21.4G 09YT26    F51  C~344t      
2013 09  23.60343  06 37 47.411  +25 14 42.33  22.2G 09YT26    F51  C~344t      
2013 09  23.60433  06 37 47.426  +25 14 42.61  22.1G 09YT26    F51  C~344t      
2013 11  24.61256  06 36 09.175  +25 23 37.99  21.5G 09YT26    F51  C~344t      
2013 11  24.61532  06 36 09.162  +25 23 38.18  21.8G 09YT26    F51  C~344t      
2013 11  24.62652  06 36 09.119  +25 23 38.15  22.0G 09YT26    F51  C~344t      
2013 11  24.62926  06 36 09.094  +25 23 38.35  22.0G 09YT26    F51  C~344t      
2013 12  22.53735  06 33 16.286  +25 28 26.16  21.2G 09YT26    F51  C~344t      
2013 12  22.55133  06 33 16.194  +25 28 26.58  21.2G 09YT26    F51  C~344t      
2014 01  06.48204  06 31 33.932  +25 30 38.66  20.9G 09YT26    F51  C~344t      
2014 01  06.49554  06 31 33.856  +25 30 37.93  21.2G 09YT26    F51  C~344t      
2014 11  17.41106  06 46 18.079  +25 35 17.38  21.6G 09YT26    F51  C~344t      
2014 11  17.42412  06 46 18.024  +25 35 17.63  21.6G 09YT26    F51  C~344t      
2014 11  17.43723  06 46 17.974  +25 35 17.73  21.8G 09YT26    F51  C~344t      
2014 11  17.45032  06 46 17.907  +25 35 17.88  21.7G 09YT26    F51  C~344t      
2014 12  03.55506  06 44 55.863  +25 38 33.69  21.6G 09YT26    F51  C~344t      
2014 12  03.56857  06 44 55.787  +25 38 33.89  21.5G 09YT26    F51  C~344t      
2014 12  03.58216  06 44 55.710  +25 38 34.00  21.4G 09YT26    F51  C~344t      
2014 12  03.59575  06 44 55.620  +25 38 34.28  21.6G 09YT26    F51  C~344t      
2015 01  23.29132  06 39 22.520  +25 47 20.65  21.6G 09YT26    F51  C~344t      
2015 01  23.30524  06 39 22.427  +25 47 20.63  21.5G 09YT26    F51  C~344t      
2015 01  23.31926  06 39 22.345  +25 47 20.72  21.5G 09YT26    F51  C~344t      
2015 01  23.33329  06 39 22.248  +25 47 20.95  21.4G 09YT26    F51  C~344t      
2015 10  28.53687  06 56 49.598  +25 41 52.33  21.9G 09YT26    F51  C~344t      
2015 10  28.54860  06 56 49.566  +25 41 52.29  22.2G 09YT26    F51  C~344t      
2015 10  28.57623  06 56 49.532  +25 41 52.75  21.7G 09YT26    F51  C~344t      
2015 11  18.49068  06 55 48.800  +25 46 07.55  21.7G 09YT26    F51  C~344t      
2015 12  18.39831  06 53 03.958  +25 52 55.96  21.7G 09YT26    F51  C~344t      
2017 01  16.46986  06 59 23.002  +26 08 43.40  21.4G 09YT26    F51  C~344t      
2017 01  16.48166  06 59 22.919  +26 08 43.54  21.8G 09YT26    F51  C~344t      
2017 01  16.49337  06 59 22.852  +26 08 43.61  21.5G 09YT26    F51  C~344t      
2017 01  16.50500  06 59 22.770  +26 08 43.52  21.5G 09YT26    F51  C~344t      
2017 01  28.43430  06 58 06.221  +26 10 45.46  21.5G 09YT26    F51  C~344t      
2017 01  28.44655  06 58 06.163  +26 10 45.40  21.4G 09YT26    F51  C~344t      
2017 01  28.45886  06 58 06.087  +26 10 45.63  21.6G 09YT26    F51  C~344t      
2017 01  28.47117  06 58 06.001  +26 10 45.69  21.8G 09YT26    F51  C~344t      
2017 10  29.53949  07 15 47.373  +25 55 51.88  21.6G 09YT26    F51  C~344t      
2017 10  29.55115  07 15 47.359  +25 55 51.93  21.5G 09YT26    F51  C~344t      
2017 10  29.56285  07 15 47.343  +25 55 52.10  21.7G 09YT26    F51  C~344t      
2017 10  29.57454  07 15 47.323  +25 55 52.18  21.6G 09YT26    F51  C~344t      
2017 12  25.53272  07 11 36.713  +26 10 44.81  21.5G 09YT26    F51  C~344t      
2017 12  25.54483  07 11 36.626  +26 10 45.15  22.1G 09YT26    F51  C~344t      
2017 12  25.55696  07 11 36.543  +26 10 45.40  21.7G 09YT26    F51  C~344t      
2017 12  25.56905  07 11 36.466  +26 10 45.51  21.5G 09YT26    F51  C~344t      
2018 01  15.32599  07 09 14.956  +26 15 55.41  21.2G 09YT26    F51  C~344t      
2018 01  15.33852  07 09 14.870  +26 15 55.58  21.4G 09YT26    F51  C~344t      
2018 01  15.35100  07 09 14.782  +26 15 55.78  21.3G 09YT26    F51  C~344t      
2018 01  15.36347  07 09 14.697  +26 15 55.91  21.1G 09YT26    F51  C~344t      
2018 02  20.23137  07 05 47.119  +26 21 27.08  21.5G 09YT26    F51  C~344t      
2018 02  20.24393  07 05 47.062  +26 21 27.28  21.8G 09YT26    F51  C~344t      
2018 02  20.25641  07 05 47.011  +26 21 27.09  21.3G 09YT26    F51  C~344t      
2018 02  20.26891  07 05 46.953  +26 21 27.21  21.7G 09YT26    F51  C~344t      
2020 09  27.62005  07 43 12.682  +25 54 59.81  21.5w 09YT26    F51  C~49g2      
2020 09  27.62393  07 43 12.702  +25 54 59.84  21.5w 09YT26    F51  C~49g2      
2020 09  27.62779  07 43 12.691  +25 55 00.11  21.5w 09YT26    F51  C~49g2      

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    -0.12       0.00     0.21
     2   0.0465      0.00    -0.05       0.00     0.07
     3   0.0465      0.00     0.07       0.00    -0.01
     4   0.0737      0.00     0.27       0.00     0.04
     5   0.1234      0.00     0.06       0.00    -0.23
     6   0.1235      0.00    -0.01       0.00    -0.10
     7   0.8709      0.00    -0.25       0.00    -0.00
     8   0.8710      0.00    -0.05       0.00     0.02
     9   1.0736      0.00    -0.17       0.00     0.38
    10   1.7555      0.00    -0.28       0.00     0.08
    11   1.7555      0.00    -0.04       0.00     0.02
    12   1.9607      0.00    -0.06       0.00    -0.08
    13   1.9608      0.00     0.09       0.00     0.06
    14   1.9608      0.00     0.04       0.00    -0.02
    15   1.9608      0.00     0.03       0.00    -0.04
    16   1.9744      0.00    -0.06       0.00    -0.19
    17   1.9745      0.00    -0.06       0.00     0.10
    18   1.9876      0.00    -0.13       0.00    -0.18
    19   1.9877      0.00     0.06       0.00    -0.02
    20   3.2305      0.00     0.04       0.00     0.03
    21   3.2305      0.00     0.03       0.00     0.07
    22   3.7897      0.00    -0.10       0.00    -0.05
    23   3.7897      0.00     0.10       0.00     0.22
    24   3.9595      0.00    -0.04       0.00    -0.09
    25   3.9595      0.00    -0.02       0.00     0.08
    26   3.9595      0.00     0.24       0.00    -0.07
    27   3.9596      0.00     0.08       0.00     0.10
    28   4.0360      0.00     0.13       0.00    -0.09
    29   4.0360      0.00     0.20       0.00     0.20
    30   4.0769      0.00     0.06       0.00     0.18
    31   4.0769      0.00     0.32       0.00    -0.65
    32   4.9391      0.00     0.00       0.00    -0.07
    33   4.9391      0.00     0.03       0.00     0.02
    34   4.9392      0.00     0.15       0.00    -0.05
    35   4.9392      0.00     0.00       0.00    -0.06
    36   4.9833      0.00    -0.04       0.00    -0.05
    37   4.9833      0.00     0.02       0.00    -0.01
    38   4.9834      0.00     0.07       0.00    -0.06
    39   4.9834      0.00    -0.08       0.00     0.06
    40   5.1222      0.00     0.03       0.00     0.07
    41   5.1223      0.00    -0.05       0.00    -0.05
    42   5.1223      0.00     0.04       0.00    -0.07
    43   5.1223      0.00    -0.09       0.00     0.06
    44   5.8840      0.00    -0.03       0.00     0.02
    45   5.8840      0.00    -0.21       0.00    -0.15
    46   5.8841      0.00    -0.03       0.00     0.00
    47   5.9414      0.00     0.02       0.00    -0.05
    48   6.0233      0.00     0.10       0.00     0.14
    49   7.1049      0.00    -0.19       0.00     0.10
    50   7.1049      0.00    -0.23       0.00     0.11
    51   7.1050      0.00    -0.05       0.00     0.05
    52   7.1050      0.00    -0.09       0.00    -0.17
    53   7.1377      0.00    -0.20       0.00     0.08
    54   7.1377      0.00     0.07       0.00    -0.09
    55   7.1377      0.00     0.07       0.00     0.03
    56   7.1378      0.00    -0.07       0.00    -0.01
    57   7.8881      0.00     0.06       0.00     0.08
    58   7.8882      0.00     0.08       0.00    -0.02
    59   7.8882      0.00     0.06       0.00     0.00
    60   7.8882      0.00    -0.01       0.00    -0.06
    61   8.0442      0.00     0.06       0.00    -0.14
    62   8.0442      0.00    -0.01       0.00     0.00
    63   8.0442      0.00    -0.02       0.00     0.06
    64   8.0443      0.00     0.05       0.00    -0.02
    65   8.1011      0.00    -0.01       0.00    -0.01
    66   8.1011      0.00    -0.01       0.00    -0.01
    67   8.1012      0.00    -0.04       0.00     0.02
    68   8.1012      0.00    -0.02       0.00    -0.02
    69   8.1994      0.00    -0.01       0.00     0.03
    70   8.1994      0.00    -0.04       0.00     0.17
    71   8.1995      0.00     0.02       0.00    -0.08
    72   8.1995      0.00    -0.03       0.00    -0.03
    73  10.8014      0.00     0.14       0.00    -0.06
    74  10.8014      0.00     0.21       0.00    -0.04
    75  10.8014      0.00    -0.18       0.00     0.22

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.

09YT26    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.675    39.675    39.675
ecceobj         0.181     0.181     0.181
incobj         10.167    10.167    10.167
qmin           31.899    31.899    31.899
qmax           47.560    47.560    47.560
amean          39.457    39.457    39.457
amin           39.036    39.036    39.036
amax           39.918    39.918    39.919
emean           0.172     0.172     0.172
emin            0.150     0.150     0.150
emax            0.192     0.192     0.192
imean           8.678     8.678     8.678
imin            8.097     8.097     8.097
imax            9.448     9.448     9.448
excite_mean     0.229     0.229     0.229
fracstop        1.000     1.000     1.000
cjmean          2.993     2.993     2.993

libcent 0       180.1     180.1     180.1
libamp  0        74.3      74.2      74.3
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       184.2     184.3     184.2
kozaiamp        180.0     180.0     180.0