Orbit Fit and Astrometric record for 21PU23

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: 21PU23    
# Created Sat Dec  4 02:14:08 2021
# Orbit generated from Bernstein formalism
# Fitting     58 observations of     59
# Arc:   2.28y
# First observation: 2019/06/03
#  Last observation: 2021/09/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000582   0.081200   0.000312   0.054809   0.064256   0.000000
# Chi-squared of fit:    18.69 DOF:    110 RMS:  0.10
# Min/Max residuals:    -0.25    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.916808E-05  8.022567E-02  1.298974E-05  5.453417E-02  6.408971E-02  1.810125E-02
# Covariance matrix:
  1.7735E-13 -5.9146E-14 -3.1779E-15 -1.2896E-14  8.3719E-14 -6.1409E-14
 -5.9146E-14  2.9847E-13 -8.8101E-14  2.5427E-13  1.4183E-13  1.8278E-12
 -3.1779E-15 -8.8101E-14  1.4086E-13 -1.4190E-13 -5.2958E-14 -6.1402E-13
 -1.2896E-14  2.5427E-13 -1.4190E-13  2.8662E-13  1.2460E-13  1.7869E-12
  8.3719E-14  1.4183E-13 -5.2958E-14  1.2460E-13  1.8585E-13  9.3574E-13
 -6.1409E-14  1.8278E-12 -6.1402E-13  1.7869E-12  9.3574E-13  1.2825E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   14.268822  -44.902770    0.897337    0.112984   -0.444471  2458638.028666
# Heliocentric elements and errors
Epoch:              2458630.5000  =  2019/05/27
Mean Anomaly:           95.58097 +/-     0.012
Argument of Peri:      272.34626 +/-     0.009
Long of Asc Node:      292.73931 +/-     0.000
Inclination:            37.04257 +/-     0.000
Eccentricity:         0.13854769 +/-    0.0000
Semi-Major Axis:     15.57881744 +/-    0.0004
Time of Perihelion: 2452667.4413 +/-       0.7
Perihelion:          13.42040828 +/-    0.0006
Aphelion:            17.73722659 +/-    0.0006
Period (y)               61.4908 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.40442579 +/-    0.0001
Ecliptic Y          -11.64123332 +/-    0.0001
Ecliptic Z            3.84600145 +/-    0.0000
Ecliptic XDOT         0.00255175 +/-    0.0000
Ecliptic YDOT         0.00230346 +/-    0.0000
Ecliptic ZDOT         0.00244815 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   16.07986680 +/-    0.0001
Geocenter to KBO     15.60312894 +/-    0.0001
# Hcoef: 10.00

The following table shows the complete astrometric record for 21PU23. 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 (21PU23) followed by the observatory code and reference code for the source of the astrometry.

2019 06  03.527865 20 53 37.785  -02 38 10.99  22.1G 21PU23    F51  C~4ypQ      
2019 06  03.540637 20 53 37.701  -02 38 10.13  22.3G 21PU23    F51  C~4ypQ      
2019 06  03.553432 20 53 37.640  -02 38 09.39  22.4G 21PU23    F51  C~4ypQ      
2019 06  03.566245 20 53 37.592  -02 38 08.85  22.0G 21PU23    F51  C~4ypQ      
2019 08  04.395872 20 43 21.045  -02 17 15.59  22.1G 21PU23    F51  C~4ypQ      
2019 08  04.407050 20 43 20.911  -02 17 15.68  21.9G 21PU23    F51  C~4ypQ      
2019 08  04.418189 20 43 20.772  -02 17 15.84  21.7G 21PU23    F51  C~4ypQ      
2019 08  04.429350 20 43 20.625  -02 17 16.09  21.6G 21PU23    F51  C~4ypQ      
2019 09  24.232878 20 34 48.427  -02 46 17.20  22.2G 21PU23    F51  C~4ypQ      
2019 09  24.244184 20 34 48.352  -02 46 17.64  22.5G 21PU23    F51  C~4ypQ      
2019 09  24.255530 20 34 48.285  -02 46 18.16  22.1G 21PU23    F51  C~4ypQ      
2019 09  24.266852 20 34 48.191  -02 46 18.60  21.7G 21PU23    F51  C~4ypQ      
2020 06  27.458183 21 04 48.970  +01 58 32.27  22.4G 21PU23    F51  C~4ypQ      
2020 06  27.470353 21 04 48.861  +01 58 32.56  22.0G 21PU23    F51  C~4ypQ      
2020 06  27.482481 21 04 48.734  +01 58 33.37  21.8G 21PU23    F51  C~4ypQ      
2020 06  27.494563 21 04 48.630  +01 58 33.71  21.8G 21PU23    F51  C~4ypQ      
2020 08  13.315826 20 55 58.780  +02 00 35.96  22.0G 21PU23    F51  C~4ypQ      
2020 08  13.330102 20 55 58.609  +02 00 35.48  21.9G 21PU23    F51  C~4ypQ      
2020 08  13.344429 20 55 58.435  +02 00 35.14  22.0G 21PU23    F51  C~4ypQ      
2020 08  13.358765 20 55 58.267  +02 00 34.67  22.0G 21PU23    F51  C~4ypQ      
2020 08  19.319884 20 54 47.413  +01 57 22.77  21.6G 21PU23    F51  C~4ypQ      
2020 08  19.332071 20 54 47.274  +01 57 22.18  22.2G 21PU23    F51  C~4ypQ      
2020 08  19.344280 20 54 47.127  +01 57 21.86  22.3G 21PU23    F51  C~4ypQ      
2020 08  19.356549 20 54 46.979  +01 57 21.55  22.2G 21PU23    F51  C~4ypQ      
2020 09  07.388302 20 51 22.419  +01 43 46.48  21.6G 21PU23    F51  C~4ypQ      
2020 09  07.395515 20 51 22.357  +01 43 45.71  22.3G 21PU23    F51  C~4ypQ      
2020 09  07.403642 20 51 22.290  +01 43 45.09  22.3G 21PU23    F51  C~4ypQ      
2021 06  13.516744 21 20 26.214  +05 54 38.94  22.4w 21PU23    F51  C~4ypQ      
2021 06  13.540094 21 20 26.068  +05 54 40.56  22.6w 21PU23    F51  C~4ypQ      
2021 06  13.551788 21 20 25.988  +05 54 41.66  22.7w 21PU23    F51  C~4ypQ      
2021 07  07.421800 21 17 18.962  +06 15 11.32  22.5w 21PU23    F51  C~4ypQ      
2021 07  07.433479 21 17 18.856  +06 15 11.59  22.4w 21PU23    F51  C~4ypQ      
2021 07  07.445172 21 17 18.716  +06 15 12.00  22.4w 21PU23    F51  C~4ypQ      
2021 08  07.322838 21 11 30.626  +06 17 53.87  22.8w 21PU23    F51  C~4ypQ      
2021 08  07.335818 21 11 30.471  +06 17 53.65  22.4w 21PU23    F51  C~4ypQ      
2021 08  07.361545 21 11 30.156  +06 17 53.15  22.1w 21PU23    F51  C~4ypQ      
2021 08  09.324064 21 11 06.443  +06 17 11.29  21.8G 21PU23    F51  C~4ypQ      
2021 08  09.333206 21 11 06.330  +06 17 11.09  21.8G 21PU23    F51  C~4ypQ      
2021 08  09.342333 21 11 06.218  +06 17 10.89  21.9G 21PU23    F51  C~4ypQ      
2021 08  09.351550 21 11 06.106  +06 17 10.69  21.7G 21PU23    F51  C~4ypQ      
2021 08  10.336235 21 10 54.221  +06 16 47.51  22.0G 21PU23    F51  C~4ypQ      
2021 08  10.351660 21 10 54.029  +06 16 47.01  22.0G 21PU23    F51  C~4ypQ      
2021 08  10.367154 21 10 53.837  +06 16 46.73  22.3G 21PU23    F51  C~4ypQ      
2021 08  10.382677 21 10 53.645  +06 16 46.34  21.9G 21PU23    F51  C~4ypQ      
2021 08  13.538380 21 10 15.600  +06 15 22.80  22.1G 21PU23    F51  C~4ypQ      
2021 08  13.539205 21 10 15.590  +06 15 22.67  22.2G 21PU23    F51  C~4ypQ      
2021 08  13.549137 21 10 15.461  +06 15 22.45  22.1G 21PU23    F51  C~4ypQ      
2021 08  13.549966 21 10 15.438  +06 15 22.31  22.1G 21PU23    F51  C~4ypQ      
2021 08  14.489642 21 10 04.187  +06 14 54.82  22.1G 21PU23    F51  C~4ypQ      
2021 08  14.505920 21 10 03.986  +06 14 54.37  21.9G 21PU23    F51  C~4ypQ      
2021 08  14.522152 21 10 03.777  +06 14 53.86  22.0G 21PU23    F51  C~4ypQ      
2021 08  14.538280 21 10 03.598  +06 14 53.32  21.9G 21PU23    F51  C~4ypQ      
2021 08  17.369721 21 09 29.831  +06 13 22.87        21PU23    568  C~4ypQ      
2021 09  10.301484 21 05 08.172  +05 54 44.57  21.9w 21PU23    F51  C~52hb      
2021 09  10.313834 21 05 08.044  +05 54 43.90  21.9w 21PU23    F51  C~52hb      
2021 09  10.326069 21 05 07.934  +05 54 43.15  21.8w 21PU23    F51  C~52hb      
2021 09  13.292847 21 04 40.227  +05 51 51.40  21.9w 21PU23    F52  C~52hb      
2021 09  13.303738 21 04 40.122  +05 51 50.64  21.8w 21PU23    F52  C~52hb      
2021 09  13.314707 21 04 40.019  +05 51 50.00  21.9w 21PU23    F52  C~52hb      

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     0.13       0.00     0.10
     2   0.0000     -0.97    -0.09       1.18     0.24
     3   0.0001     -1.63    -0.00       2.15     0.18
     4   0.0001     -2.17     0.22       2.87    -0.14
     5   0.1694  -8522.79    -0.19    3805.45    -0.12
     6   0.1694  -8524.75    -0.05    3805.93    -0.04
     7   0.1694  -8526.79    -0.01    3806.36    -0.01
     8   0.1695  -8528.98    -0.11    3806.74    -0.03
     9   0.3086 -16416.75     0.15    4284.32    -0.07
    10   0.3086 -16417.96     0.08    4284.21    -0.04
    11   0.3086 -16419.08     0.12    4283.99    -0.12
    12   0.3087 -16420.56    -0.22    4283.96    -0.00
    13   1.0676  14387.80     0.10   13122.48    -0.02
    14   1.0676  14386.31     0.09   13123.22    -0.19
    15   1.0676  14384.70    -0.03   13124.54     0.21
    16   1.0677  14383.29     0.04   13125.31     0.07
    17   1.1959   6762.82    -0.07   15485.36     0.08
    18   1.1959   6760.22    -0.04   15485.62     0.00
    19   1.1959   6757.61     0.00   15486.03     0.07
    20   1.1960   6755.05     0.10   15486.29    -0.02
    21   1.2123   5677.99    -0.03   15601.30     0.04
    22   1.2123   5675.82     0.02   15601.32    -0.14
    23   1.2124   5673.61     0.02   15601.63    -0.03
    24   1.2124   5671.38     0.03   15601.96     0.09
    25   1.2645   2488.84 (  -0.19)  15683.01 (   0.51)
    26   1.2645   2487.73    -0.19   15682.53     0.07
    27   1.2645   2486.59    -0.08   15682.22    -0.20
    28   2.0287  32175.40     0.07   23008.03    -0.16
    29   2.0288  32173.73    -0.09   23010.23    -0.16
    30   2.0288  32172.88    -0.18   23011.65     0.16
    31   2.0942  29785.69    -0.04   24998.30     0.15
    32   2.0942  29784.22     0.08   24999.00     0.01
    33   2.0942  29782.28    -0.25   24999.99     0.15
    34   2.1788  24732.49     0.00   26602.81    -0.03
    35   2.1788  24730.16     0.07   26603.24    -0.01
    36   2.1789  24725.41     0.08   26604.05    -0.01
    37   2.1842  24366.84    -0.02   26661.42    -0.05
    38   2.1843  24365.13    -0.03   26661.69    -0.04
    39   2.1843  24363.44    -0.03   26661.96    -0.03
    40   2.1843  24361.74    -0.01   26662.23    -0.03
    41   2.1870  24181.43     0.06   26688.83    -0.08
    42   2.1871  24178.48    -0.02   26689.14    -0.20
    43   2.1871  24175.59    -0.02   26689.66    -0.10
    44   2.1871  24172.67    -0.04   26690.08    -0.11
    45   2.1958  23592.94     0.15   26766.14     0.03
    46   2.1958  23592.75     0.12   26766.05    -0.08
    47   2.1958  23590.81     0.03   26766.37     0.02
    48   2.1958  23590.43    -0.20   26766.33    -0.04
    49   2.1984  23418.23     0.07   26786.11     0.00
    50   2.1984  23415.17     0.05   26786.50     0.06
    51   2.1985  23411.97    -0.12   26786.87     0.09
    52   2.1985  23409.20     0.11   26787.08    -0.04
    53   2.2063  22890.22     0.07   26838.70     0.01
    54   2.2718  18754.83     0.06   26832.92     0.09
    55   2.2718  18752.77    -0.03   26832.80     0.15
    56   2.2719  18750.96     0.09   26832.52     0.06
    57   2.2800  18298.35     0.05   26780.09     0.13
    58   2.2800  18296.60    -0.04   26779.78     0.02
    59   2.2800  18294.92    -0.05   26779.59     0.03

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.

21PU23    quality flag:3

Type:       CENTAURS  CENTAURS  CENTAURS

axisobj        15.467    15.476    15.457
ecceobj         0.136     0.136     0.135
incobj         37.105    37.105    37.105
qmin           12.989    12.757    13.323
qmax           18.173    18.366    17.831
amean          15.544    15.510    15.567
amin           15.393    15.358    15.430
amax           15.693    15.660    15.677
emean           0.112     0.129     0.050
emin            0.054     0.080     0.021
emax            0.163     0.177     0.141
imean          38.653    38.347    38.796
imin           37.815    37.393    38.139
imax           39.453    39.304    39.502
excite_mean     0.635     0.634     0.629
fracstop        1.000     1.000     1.000
cjmean          3.052     3.057     3.053

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       179.4     180.0     179.0
kozaiamp        180.0     180.0     179.9