Orbit Fit and Astrometric record for 09XM26

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: 09XM26    
# Created Fri Dec  3 02:10:44 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     62 observations of     62
# Arc:  10.13y
# First observation: 2009/12/08
#  Last observation: 2020/01/24
# Chi-squared of fit:    48.83 DOF:    118 RMS:  0.16
# Min/Max residuals:    -0.94    0.39
# Exact a, adot, b, bdot, g, gdot:
  2.128431E-05  5.229322E-02 -8.483132E-06 -2.075453E-02  3.940813E-02  9.508213E-03
# Covariance matrix:
  1.4415E-13 -4.4687E-14 -1.8112E-14  1.3150E-14  1.9050E-14 -6.9578E-14
 -4.4687E-14  2.9813E-14  1.5055E-14 -1.1053E-14  1.8854E-14  5.8364E-14
 -1.8112E-14  1.5055E-14  1.0127E-13 -1.9727E-14  8.2703E-15  3.2534E-14
  1.3150E-14 -1.1053E-14 -1.9727E-14  7.2055E-15 -6.4555E-15 -2.3861E-14
  1.9050E-14  1.8854E-14  8.2703E-15 -6.4555E-15  1.1937E-13  3.3725E-14
 -6.9578E-14  5.8364E-14  3.2534E-14 -2.3861E-14  3.3725E-14  1.2602E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    1.500764   99.492210    0.381236    0.023860   -0.910253  2455174.130596
# Heliocentric elements and errors
Epoch:              2455174.5000  =  2009/12/09
Mean Anomaly:           11.71877 +/-     0.001
Argument of Peri:      145.45033 +/-     0.002
Long of Asc Node:      282.30942 +/-     0.000
Inclination:            21.63841 +/-     0.000
Eccentricity:         0.41880697 +/-    0.0000
Semi-Major Axis:     43.36443387 +/-    0.0028
Time of Perihelion: 2451779.1973 +/-       0.5
Perihelion:          25.20310663 +/-    0.0021
Aphelion:            61.52576112 +/-    0.0042
Period (y)              285.5675 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           -3.95432926 +/-    0.0000
Ecliptic Y           25.97727787 +/-    0.0002
Ecliptic Z            0.66436048 +/-    0.0000
Ecliptic XDOT        -0.00369521 +/-    0.0000
Ecliptic YDOT         0.00009483 +/-    0.0000
Ecliptic ZDOT        -0.00142418 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   26.28483131 +/-    0.0002
Geocenter to KBO     25.37540005 +/-    0.0002
# Hcoef:  7.86

The following table shows the complete astrometric record for 09XM26. 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 (09XM26) followed by the observatory code and reference code for the source of the astrometry.

2009 12  08.62983  06 41 47.038  +24 35 47.42  21.8G 09XM26    F51  C~344s      
2009 12  08.63756  06 41 46.986  +24 35 47.26  21.6G 09XM26    F51  C~344s      
2009 12  25.41783  06 39 33.471  +24 34 53.15  21.2G 09XM26    F51  C~344s      
2009 12  25.42577  06 39 33.410  +24 34 53.19  20.9G 09XM26    F51  C~344s      
2009 12  26.38146  06 39 25.495  +24 34 49.44  22.5G 09XM26    F51  C~344s      
2009 12  26.39150  06 39 25.421  +24 34 49.50  22.3G 09XM26    F51  C~344s      
2010 01  23.49036  06 35 39.937  +24 32 22.25  21.4G 09XM26    F51  C~344s      
2010 12  15.60627  06 53 27.431  +23 10 21.28  21.9G 09XM26    F51  C~344s      
2010 12  15.61824  06 53 27.321  +23 10 21.50  21.9G 09XM26    F51  C~344s      
2011 01  05.51489  06 50 39.949  +23 09 49.07  21.5G 09XM26    F51  C~344s      
2011 01  05.52685  06 50 39.832  +23 09 48.98  21.6G 09XM26    F51  C~344s      
2012 01  11.50759  07 02 01.338  +21 43 33.91  21.7G 09XM26    F51  C~344s      
2012 01  25.29410  07 00 15.001  +21 43 41.26  21.8G 09XM26    F51  C~344s      
2012 01  25.30737  07 00 14.893  +21 43 41.54  22.1G 09XM26    F51  C~344s      
2012 02  10.25517  06 58 27.751  +21 43 32.17  21.9G 09XM26    F51  C~344s      
2012 02  10.26838  06 58 27.658  +21 43 31.51  21.5G 09XM26    F51  C~344s      
2012 11  15.64706  07 19 47.224  +20 16 54.47  21.4G 09XM26    F51  C~344s      
2013 10  21.59431  07 31 19.868  +18 54 09.16  22.5G 09XM26    F51  C~344s      
2013 12  11.56293  07 28 34.996  +18 46 18.40  22.2G 09XM26    F51  C~344s      
2013 12  11.57805  07 28 34.888  +18 46 18.29  22.2G 09XM26    F51  C~344s      
2013 12  11.59318  07 28 34.801  +18 46 18.22  22.9G 09XM26    F51  C~344s      
2013 12  11.60831  07 28 34.699  +18 46 18.25  22.0G 09XM26    F51  C~344s      
2013 12  12.61836  07 28 28.230  +18 46 17.47  22.0G 09XM26    F51  C~344s      
2013 12  12.62988  07 28 28.155  +18 46 17.92  21.7G 09XM26    F51  C~344s      
2014 01  10.32515  07 24 58.664  +18 47 33.60  21.4G 09XM26    F51  C~344s      
2014 01  10.33891  07 24 58.580  +18 47 33.68  22.4G 09XM26    F51  C~344s      
2014 01  26.29239  07 22 57.591  +18 49 05.46  22.2G 09XM26    F51  C~344s      
2014 01  26.30442  07 22 57.512  +18 49 05.48  22.4G 09XM26    F51  C~344s      
2014 01  26.33375  07 22 57.294  +18 49 05.67  22.1G 09XM26    F51  C~344s      
2014 01  26.34565  07 22 57.203  +18 49 05.71  22.2G 09XM26    F51  C~344s      
2014 11  18.48000  07 41 04.073  +17 19 19.73  22.6G 09XM26    F51  C~344s      
2014 11  18.49324  07 41 04.056  +17 19 19.77  22.3G 09XM26    F51  C~344s      
2016 01  31.32156  07 43 34.209  +15 53 10.29  21.8G 09XM26    F51  C~344s      
2016 01  31.33353  07 43 34.114  +15 53 10.44  21.1G 09XM26    F51  C~344s      
2016 04  02.27017  07 39 21.359  +16 02 07.33  22.5G 09XM26    F51  C~344s      
2016 04  02.28279  07 39 21.349  +16 02 07.36  22.7G 09XM26    F51  C~344s      
2016 04  02.29544  07 39 21.368  +16 02 07.33  22.8G 09XM26    F51  C~344s      
2016 04  02.30811  07 39 21.371  +16 02 07.32  22.2G 09XM26    F51  C~344s      
2017 01  05.36179  07 56 34.351  +14 20 45.07  22.4G 09XM26    F51  C~344s      
2017 01  26.44933  07 54 01.518  +14 24 19.62  22.1G 09XM26    F51  C~344s      
2017 01  26.45994  07 54 01.439  +14 24 19.80  21.9G 09XM26    F51  C~344s      
2017 01  26.47058  07 54 01.371  +14 24 19.84  22.3G 09XM26    F51  C~344s      
2017 01  26.48119  07 54 01.285  +14 24 19.93  22.7G 09XM26    F51  C~344s      
2017 11  22.54349  08 09 55.640  +12 55 05.39  22.5G 09XM26    F51  C~344s      
2017 11  22.55428  08 09 55.628  +12 55 04.93  22.4G 09XM26    F51  C~344s      
2017 11  22.56509  08 09 55.572  +12 55 05.06  22.5G 09XM26    F51  C~344s      
2017 11  22.57597  08 09 55.551  +12 55 04.75  22.7G 09XM26    F51  C~344s      
2017 12  24.44713  08 07 26.383  +12 52 00.03  22.2G 09XM26    F51  C~344s      
2017 12  24.45869  08 07 26.312  +12 52 00.14  22.1G 09XM26    F51  C~344s      
2017 12  24.47033  08 07 26.239  +12 52 00.31  22.2G 09XM26    F51  C~344s      
2017 12  24.48191  08 07 26.159  +12 52 00.22  22.3G 09XM26    F51  C~344s      
2018 01  12.54344  08 05 17.689  +12 54 01.11  22.4G 09XM26    F51  C~344s      
2018 01  12.55683  08 05 17.591  +12 54 01.24  22.3G 09XM26    F51  C~344s      
2018 01  12.57028  08 05 17.498  +12 54 01.30  22.3G 09XM26    F51  C~344s      
2018 01  12.58373  08 05 17.407  +12 54 01.04  22.0G 09XM26    F51  C~344s      
2018 01  20.49636  08 04 20.799  +12 55 30.73  22.1G 09XM26    F51  C~344s      
2018 01  20.50870  08 04 20.706  +12 55 30.99  22.0G 09XM26    F51  C~344s      
2018 01  20.52092  08 04 20.614  +12 55 31.05  22.1G 09XM26    F51  C~344s      
2018 01  20.53316  08 04 20.531  +12 55 31.25  22.1G 09XM26    F51  C~344s      
2020 01  24.33240  08 22 03.036  +10 04 20.56  22.1w 09XM26    F51  C~3cej      
2020 01  24.34243  08 22 02.961  +10 04 20.78  22.1w 09XM26    F51  C~3cej      
2020 01  24.35246  08 22 02.874  +10 04 20.75  22.3w 09XM26    F51  C~3cej      

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    -0.07       0.00     0.04
     2   0.0000      0.00     0.03       0.00    -0.10
     3   0.0460      0.00    -0.05       0.00     0.05
     4   0.0460      0.00     0.04       0.00     0.12
     5   0.0486      0.00    -0.14       0.00    -0.04
     6   0.0486      0.00     0.02       0.00     0.06
     7   0.1256      0.00     0.19       0.00    -0.31
     8   1.0184      0.00     0.15       0.00    -0.07
     9   1.0184      0.00    -0.11       0.00     0.18
    10   1.0757      0.00     0.04       0.00     0.22
    11   1.0757      0.00    -0.23       0.00     0.16
    12   2.0914      0.00    -0.04       0.00    -0.05
    13   2.1291      0.00     0.06       0.00     0.03
    14   2.1292      0.00    -0.07       0.00     0.31
    15   2.1728      0.00     0.08       0.00    -0.30
    16   2.1729      0.00    -0.11       0.00    -0.94
    17   2.9378      0.00    -0.23       0.00     0.16
    18   3.8685      0.00    -0.06       0.00     0.02
    19   4.0080      0.00     0.07       0.00     0.07
    20   4.0081      0.00    -0.08       0.00    -0.02
    21   4.0081      0.00     0.09       0.00    -0.08
    22   4.0082      0.00     0.03       0.00    -0.03
    23   4.0109      0.00     0.18       0.00    -0.08
    24   4.0110      0.00     0.18       0.00     0.39
    25   4.0895      0.00     0.01       0.00    -0.13
    26   4.0896      0.00     0.36       0.00    -0.13
    27   4.1332      0.00    -0.10       0.00     0.16
    28   4.1333      0.00     0.06       0.00     0.10
    29   4.1333      0.00     0.05       0.00     0.11
    30   4.1334      0.00     0.02       0.00     0.07
    31   4.9441      0.00    -0.30       0.00    -0.12
    32   4.9442      0.00     0.11       0.00     0.05
    33   6.1456      0.00    -0.15       0.00     0.11
    34   6.1457      0.00    -0.29       0.00     0.12
    35   6.3152      0.00    -0.12       0.00     0.02
    36   6.3153      0.00    -0.24       0.00     0.03
    37   6.3153      0.00     0.08       0.00    -0.02
    38   6.3153      0.00     0.16       0.00    -0.06
    39   7.0766      0.00     0.05       0.00     0.18
    40   7.1343      0.00     0.04       0.00     0.13
    41   7.1344      0.00     0.01       0.00     0.18
    42   7.1344      0.00     0.16       0.00     0.09
    43   7.1344      0.00     0.03       0.00     0.05
    44   7.9560      0.00    -0.05       0.00     0.12
    45   7.9560      0.00     0.25       0.00    -0.19
    46   7.9560      0.00    -0.11       0.00     0.09
    47   7.9560      0.00     0.06       0.00    -0.06
    48   8.0433      0.00    -0.02       0.00    -0.17
    49   8.0433      0.00     0.01       0.00    -0.09
    50   8.0434      0.00     0.02       0.00     0.05
    51   8.0434      0.00    -0.08       0.00    -0.06
    52   8.0956      0.00    -0.06       0.00     0.06
    53   8.0956      0.00    -0.09       0.00     0.06
    54   8.0957      0.00    -0.03       0.00    -0.01
    55   8.0957      0.00     0.06       0.00    -0.40
    56   8.1174      0.00     0.08       0.00    -0.06
    57   8.1174      0.00     0.04       0.00     0.05
    58   8.1174      0.00    -0.01       0.00    -0.04
    59   8.1175      0.00     0.09       0.00     0.01
    60  10.1265      0.00     0.08       0.00    -0.01
    61  10.1265      0.00     0.01       0.00     0.05
    62  10.1266      0.00    -0.23       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.

09XM26    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        43.962    43.962    43.962
ecceobj         0.426     0.426     0.426
incobj         21.595    21.595    21.595
qmin           23.816    23.786    23.956
qmax           64.332    64.241    64.382
amean          43.552    43.614    43.555
amin           42.888    42.907    42.449
amax           44.364    45.146    45.244
emean           0.429     0.424     0.427
emin            0.381     0.373     0.384
emax            0.453     0.453     0.452
imean          22.692    22.824    22.827
imin           21.248    21.188    21.437
imax           25.809    25.573    25.973
excite_mean     0.578     0.575     0.577
fracstop        0.129     0.288     0.117
cjmean          2.689     2.695     2.690

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       193.6     192.9     194.6
kozaiamp         43.8     179.8      41.7