Orbit Fit and Astrometric record for 21SN11

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: 21SN11    
# Created Fri Dec  3 02:14:04 2021
# Orbit generated from Bernstein formalism
# Fitting     30 observations of     30
# Arc:   1.23y
# First observation: 2020/07/18
#  Last observation: 2021/10/09
Preliminary a, adot, b, bdot, g, gdot:
  -0.000100   0.530388  -0.002703   0.147057   0.190897   0.000000
# WARNING MRQMIN stopped after  13 iterations -- oscilliatory solution
# Chi-squared of fit:  9999.99 DOF:     54 RMS: 74.34
# Min/Max residuals:  -165.48  136.52
# Exact a, adot, b, bdot, g, gdot:
  7.499213E-05  4.382144E-01 -4.761726E-04  1.150368E-01  1.699068E-01 -5.230730E-02
# Covariance matrix:
  1.6782E-13  1.5464E-13 -7.7294E-15  4.8150E-14  1.8593E-13  2.9536E-13
  1.5464E-13  8.4203E-11 -2.5459E-12  3.0657E-11  1.8467E-11  1.6322E-10
 -7.7294E-15 -2.5459E-12  1.8391E-13 -1.0194E-12 -5.5977E-13 -4.9413E-12
  4.8150E-14  3.0657E-11 -1.0194E-12  1.1324E-11  6.6422E-12  5.9636E-11
  1.8593E-13  1.8467E-11 -5.5977E-13  6.6422E-12  4.3445E-12  3.5450E-11
  2.9536E-13  1.6322E-10 -4.9413E-12  5.9636E-11  3.5450E-11  3.1740E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.999077  -14.362454    0.768108    0.101924   -0.644417  2459049.051329
# Heliocentric elements and errors
Epoch:              2459040.5000  =  2020/07/10
Mean Anomaly:          324.60539 +/-     0.003
Argument of Peri:       89.87649 +/-     0.008
Long of Asc Node:      312.65752 +/-     0.000
Inclination:            17.70602 +/-     0.000
Eccentricity:         0.30313011 +/-    0.0000
Semi-Major Axis:      8.26103800 +/-    0.0002
Time of Perihelion: 2459893.1779 +/-       0.1
Perihelion:           5.75686862 +/-    0.0003
Aphelion:            10.76520739 +/-    0.0003
Period (y)               23.7443 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            6.07891730 +/-    0.0001
Ecliptic Y           -2.35443669 +/-    0.0000
Ecliptic Z            0.91790661 +/-    0.0000
Ecliptic XDOT         0.00067212 +/-    0.0000
Ecliptic YDOT         0.00712325 +/-    0.0000
Ecliptic ZDOT         0.00169880 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.58324845 +/-    0.0001
Geocenter to KBO      5.88558070 +/-    0.0001
# Hcoef: 14.44

The following table shows the complete astrometric record for 21SN11. 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 (21SN11) followed by the observatory code and reference code for the source of the astrometry.

2020 07  18.550528 22 53 12.735  +02 38 22.91  22.9G 21SN11    F51  C~55rz      
2020 07  18.563140 22 53 12.568  +02 38 23.60  23.0G 21SN11    F51  C~55rz      
2020 07  18.575841 22 53 12.418  +02 38 24.45  22.7G 21SN11    F51  C~55rz      
2020 07  18.588594 22 53 12.257  +02 38 25.58  23.0G 21SN11    F51  C~55rz      
2020 07  22.511551 22 52 21.477  +02 42 18.99  22.5G 21SN11    F51  C~55rz      
2020 07  22.524566 22 52 21.321  +02 42 19.64  22.6G 21SN11    F51  C~55rz      
2020 07  22.537875 22 52 21.117  +02 42 20.61  22.9G 21SN11    F51  C~55rz      
2020 07  28.449462 22 50 51.078  +02 46 28.90  22.6G 21SN11    F52  C~55rz      
2020 08  18.484418 22 43 42.088  +02 45 08.79  22.2G 21SN11    F52  C~55rz      
2020 08  23.475341 22 41 42.577  +02 41 25.66  22.2G 21SN11    F52  C~55rz      
2020 09  10.366516 22 34 18.984  +02 20 01.83  22.0G 21SN11    F52  C~55rz      
2020 09  13.370453 22 33 06.087  +02 15 31.43  21.4G 21SN11    F52  C~55rz      
2020 10  14.366838 22 23 09.723  +01 26 42.86  22.9G 21SN11    F51  C~55rz      
2020 10  14.379245 22 23 09.545  +01 26 42.21  22.7G 21SN11    F51  C~55rz      
2020 10  14.391624 22 23 09.390  +01 26 40.94  23.1G 21SN11    F51  C~55rz      
2021 09  28.288499 00 06 21.125  +20 08 50.36  22.3w 21SN11    F52  C~55rz      
2021 09  28.300104 00 06 20.817  +20 08 49.64  21.9w 21SN11    F52  C~55rz      
2021 09  28.311681 00 06 20.500  +20 08 48.46  22.0w 21SN11    F52  C~55rz      
2021 10  05.304662 00 03 11.467  +19 55 56.31  21.8G 21SN11    F52  C~55rz      
2021 10  05.316157 00 03 11.158  +19 55 55.05  21.7G 21SN11    F52  C~55rz      
2021 10  05.327690 00 03 10.856  +19 55 54.01  21.6G 21SN11    F52  C~55rz      
2021 10  06.489838 00 02 39.908  +19 53 27.54  22.1w 21SN11    F51  C~55rz      
2021 10  06.502005 00 02 39.583  +19 53 25.81  22.3w 21SN11    F51  C~55rz      
2021 10  06.514184 00 02 39.258  +19 53 24.13  22.2w 21SN11    F51  C~55rz      
2021 10  06.526252 00 02 38.932  +19 53 22.74  22.2w 21SN11    F51  C~55rz      
2021 10  08.37102  00 01 50.58   +19 49 21.9         21SN11    291  C~55rz      
2021 10  08.38497  00 01 50.17   +19 49 19.2         21SN11    291  C~55rz      
2021 10  08.39894  00 01 49.78   +19 49 17.2   21.5R 21SN11    291  C~55rz      
2021 10  09.177039 00 01 29.73   +19 47 32.4   22.1V 21SN11    H21  C~59xx      
2021 10  09.184131 00 01 29.56   +19 47 31.7   22.1V 21SN11    H21  C~59xx      

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    -7.06       0.00   100.43
     2   0.0000     -2.04    -7.24       1.60   100.28
     3   0.0001     -3.79    -7.12       3.25   100.17
     4   0.0001     -5.58    -7.03       5.23   100.38
     5   0.0108   -617.48   -10.11     514.14    82.86
     6   0.0109   -619.38    -9.68     515.64    82.59
     7   0.0109   -621.83    -9.74     517.71    82.84
     8   0.0271  -1770.49    -9.50    1267.61    56.00
     9   0.0847  -7732.76    13.65    3682.36   -30.13
    10   0.0984  -9473.38    21.74    4172.27   -48.23
    11   0.1473 -16126.45    43.02    5580.27  -103.26
    12   0.1556 -17246.03    44.46    5758.29  -110.86
    13   0.2404 -26734.75   -11.65    6565.59  -165.48
    14   0.2405 -26737.51   -11.76    6566.04  -165.05
    15   0.2405 -26740.19   -11.79    6565.78  -165.33
    16   1.1957  88447.62   136.20   37765.43    24.94
    17   1.1958  88442.44   136.52   37766.07    25.30
    18   1.1958  88436.93   136.49   37766.26    25.21
    19   1.2149  85138.20    88.89   37813.38    42.73
    20   1.2150  85132.84    88.93   37813.47    42.88
    21   1.2150  85127.68    89.20   37813.76    43.24
    22   1.2182  84582.24    80.54   37801.58    45.25
    23   1.2182  84576.43    80.44   37801.25    45.10
    24   1.2182  84570.65    80.37   37800.97    45.01
    25   1.2183  84564.98    80.34   37801.01    45.23
    26   1.2233  83709.50    67.40   37770.15    49.34
    27   1.2234  83701.98    66.34   37769.20    48.69
    28   1.2234  83695.06    65.89   37768.89    48.71
    29   1.2255  83338.87    60.95   37751.20    50.15
    30   1.2256  83335.93    61.29   37751.26    50.36

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.

21SN11    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj         8.578     8.578     8.578
ecceobj         0.369     0.369     0.369
incobj         17.576    17.576    17.576
qmin            5.412     5.412     5.412
qmax           11.744    11.744    11.744
amean           8.311     8.342     8.290
amin            7.962     8.070     8.045
amax            8.578     8.627     8.578
emean           0.316     0.298     0.326
emin            0.285     0.234     0.288
emax            0.369     0.369     0.369
imean          20.153    20.787    19.628
imin           19.019    19.019    19.019
imax           21.054    22.583    20.552
excite_mean     0.468     0.465     0.469
fracstop        0.001     0.001     0.000
cjmean          4.562     4.552     4.569

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       120.0     139.1     107.8
kozaiamp         18.9      55.5       6.7