Orbit Fit and Astrometric record for 20RP11

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: 20RP11    
# Created Tue Dec  7 02:14:17 2021
# Orbit generated from Bernstein formalism
# Fitting     63 observations of     63
# Arc:   1.27y
# First observation: 2020/08/22
#  Last observation: 2021/11/28
Preliminary a, adot, b, bdot, g, gdot:
   0.008854   0.632403   0.005821  -0.327319   0.222687   0.000000
# Chi-squared of fit:   103.53 DOF:    120 RMS:  0.23
# Min/Max residuals:    -0.82    0.64
# Exact a, adot, b, bdot, g, gdot:
  4.592172E-05  5.012815E-01 -2.429847E-05 -2.531234E-01  1.757728E-01 -8.894382E-02
# Covariance matrix:
  5.9055E-14  1.0736E-13  8.7159E-15 -7.3824E-14  7.6401E-14  1.7752E-13
  1.0736E-13  1.6174E-11  8.9860E-13 -1.0540E-11  3.3478E-12  2.5612E-11
  8.7159E-15  8.9860E-13  8.7595E-14 -6.2092E-13  1.8862E-13  1.4263E-12
 -7.3824E-14 -1.0540E-11 -6.2092E-13  6.9704E-12 -2.1468E-12 -1.6795E-11
  7.6401E-14  3.3478E-12  1.8862E-13 -2.1468E-12  8.0421E-13  5.2123E-12
  1.7752E-13  2.5612E-11  1.4263E-12 -1.6795E-11  5.2123E-12  4.0816E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -13.015799   10.446037    0.654101   -0.171386   -0.740935  2459084.011571
# Heliocentric elements and errors
Epoch:              2459080.5000  =  2020/08/19
Mean Anomaly:          356.16749 +/-     0.000
Argument of Peri:      238.30789 +/-     0.002
Long of Asc Node:      164.27746 +/-     0.000
Inclination:            30.35327 +/-     0.000
Eccentricity:         0.73739674 +/-    0.0000
Semi-Major Axis:     22.72417741 +/-    0.0008
Time of Perihelion: 2459501.7221 +/-       0.0
Perihelion:           5.96744313 +/-    0.0003
Aphelion:            39.48091168 +/-    0.0014
Period (y)              108.3279 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            6.32323912 +/-    0.0000
Ecliptic Y            0.49318948 +/-    0.0000
Ecliptic Z           -1.28141303 +/-    0.0000
Ecliptic XDOT        -0.00360869 +/-    0.0000
Ecliptic YDOT         0.00727744 +/-    0.0000
Ecliptic ZDOT        -0.00352958 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    6.47059566 +/-    0.0000
Geocenter to KBO      5.68916129 +/-    0.0000
# Hcoef: 13.59

The following table shows the complete astrometric record for 20RP11. 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 (20RP11) followed by the observatory code and reference code for the source of the astrometry.

2020 08  22.510770 00 58 51.934  -07 50 15.68  21.8G 20RP11    F51  C~4Apc      
2020 08  22.523166 00 58 51.881  -07 50 19.43  21.8G 20RP11    F51  C~4Apc      
2020 08  22.535652 00 58 51.790  -07 50 23.12  21.8G 20RP11    F51  C~4Apc      
2020 08  22.538811 00 58 51.800  -07 50 23.95  21.8G 20RP11    F52  C~4Apc      
2020 08  22.549785 00 58 51.731  -07 50 27.40  21.4G 20RP11    F52  C~4Apc      
2020 08  22.560765 00 58 51.636  -07 50 30.65  21.9G 20RP11    F52  C~4Apc      
2020 08  22.571694 00 58 51.569  -07 50 33.82  22.2G 20RP11    F52  C~4Apc      
2020 08  30.573882 00 57 52.256  -08 30 01.99  21.5G 20RP11    F52  C~4Apc      
2020 08  30.587370 00 57 52.124  -08 30 06.22  21.6G 20RP11    F52  C~4Apc      
2020 08  30.600914 00 57 51.973  -08 30 10.04  21.4G 20RP11    F52  C~4Apc      
2020 09  09.456434 00 56 00.181  -09 20 45.12  21.6i 20RP11    F51  C~4Apc      
2020 09  09.467862 00 56 00.009  -09 20 48.67  21.3i 20RP11    F51  C~4Apc      
2020 09  09.490769 00 55 59.696  -09 20 55.85  21.7i 20RP11    F51  C~4Apc      
2020 09  13.462316 00 55 04.032  -09 41 31.96  21.4G 20RP11    F52  C~4Apc      
2020 09  13.473862 00 55 03.863  -09 41 35.63  21.8G 20RP11    F52  C~4Apc      
2020 09  13.497019 00 55 03.512  -09 41 42.70  21.2G 20RP11    F52  C~4Apc      
2020 09  14.369648 00 54 50.612  -09 46 13.90  21.6G 20RP11    F51  C~4Apc      
2020 09  14.383317 00 54 50.401  -09 46 18.22  21.6G 20RP11    F51  C~4Apc      
2020 09  14.397046 00 54 50.188  -09 46 22.83  21.2G 20RP11    F51  C~4Apc      
2020 09  15.395456 00 54 35.068  -09 51 32.68  21.4G 20RP11    F52  C~4Apc      
2020 09  15.412598 00 54 34.791  -09 51 37.71  21.8G 20RP11    F52  C~4Apc      
2020 09  15.429756 00 54 34.517  -09 51 42.88  21.4G 20RP11    F52  C~4Apc      
2020 09  15.446845 00 54 34.246  -09 51 48.60  21.4G 20RP11    F52  C~4Apc      
2020 09  18.345861 00 53 48.668  -10 06 44.52  22.3G 20RP11    F52  C~4Apc      
2020 09  18.362924 00 53 48.424  -10 06 49.72  22.8G 20RP11    F52  C~4Apc      
2020 09  18.379979 00 53 48.114  -10 06 55.25  23.2G 20RP11    F52  C~4Apc      
2020 09  18.396983 00 53 47.862  -10 07 00.82  23.0G 20RP11    F52  C~4Apc      
2020 10  05.474501 00 48 45.094  -11 30 17.53  21.6G 20RP11    F51  C~4Apc      
2020 10  10.373547 00 47 14.006  -11 51 44.03  21.7w 20RP11    F51  C~4Apc      
2020 10  10.385190 00 47 13.774  -11 51 46.92  21.5w 20RP11    F51  C~4Apc      
2020 10  10.396828 00 47 13.564  -11 51 49.89  21.5w 20RP11    F51  C~4Apc      
2020 10  10.408476 00 47 13.338  -11 51 52.86  21.6w 20RP11    F51  C~4Apc      
2020 10  14.421334 00 45 59.482  -12 08 19.81  21.6w 20RP11    F51  C~4Apc      
2020 10  14.432486 00 45 59.269  -12 08 22.37  21.6w 20RP11    F51  C~4Apc      
2020 10  14.443616 00 45 59.066  -12 08 24.96  21.5w 20RP11    F51  C~4Apc      
2020 10  14.454719 00 45 58.852  -12 08 27.63  21.8w 20RP11    F51  C~4Apc      
2020 10  15.24079  00 45 44.61   -12 11 33.1         20RP11    711  C~4Apc      
2020 10  15.24547  00 45 44.55   -12 11 33.7         20RP11    711  C~4Apc      
2020 10  15.24987  00 45 44.46   -12 11 36.1         20RP11    711  C~4Apc      
2020 10  20.31455  00 44 14.729  -12 30 24.12  21.3w 20RP11    F52  C~4Apc      
2020 10  20.32673  00 44 14.468  -12 30 26.78  21.4w 20RP11    F52  C~4Apc      
2020 10  20.33892  00 44 14.270  -12 30 29.63  21.1w 20RP11    F52  C~4Apc      
2021 09  27.59091  03 19 29.249  -11 31 33.84  21.0i 20RP11    F51  C~5Bm4      
2021 09  27.60295  03 19 29.189  -11 31 37.69  21.0i 20RP11    F51  C~5Bm4      
2021 09  27.61495  03 19 29.089  -11 31 41.73  20.9i 20RP11    F51  C~5Bm4      
2021 10  01.42647  03 19 03.41   -11 52 43.2   21.4V 20RP11    691  C~5Bm4      
2021 10  01.44065  03 19 03.31   -11 52 47.7   21.3V 20RP11    691  C~5Bm4      
2021 10  01.45485  03 19 03.20   -11 52 52.1   21.3V 20RP11    691  C~5Bm4      
2021 10  14.56318  03 16 35.305  -13 01 30.77  21.3w 20RP11    F51  C~5Bm4      
2021 10  14.57418  03 16 35.139  -13 01 34.13  21.3w 20RP11    F51  C~5Bm4      
2021 10  14.58520  03 16 34.959  -13 01 37.41  21.3w 20RP11    F51  C~5Bm4      
2021 10  31.45950  03 11 40.852  -14 14 29.69  21.3w 20RP11    F51  C~5Bm4      
2021 10  31.48355  03 11 40.351  -14 14 34.81  21.2w 20RP11    F51  C~5Bm4      
2021 10  31.49560  03 11 40.109  -14 14 37.36  21.1w 20RP11    F51  C~5Bm4      
2021 11  07.45401  03 09 19.047  -14 37 15.92  21.2w 20RP11    F52  C~5Bm4      
2021 11  07.47594  03 09 18.589  -14 37 19.93  21.1w 20RP11    F52  C~5Bm4      
2021 11  25.39901  03 03 16.064  -15 10 47.32  21.1i 20RP11    F51  C~5HP7      
2021 11  25.41133  03 03 15.823  -15 10 47.38  20.8i 20RP11    F51  C~5HP7      
2021 11  25.42366  03 03 15.582  -15 10 47.94  21.1i 20RP11    F51  C~5HP7      
2021 11  28.42509  03 02 19.986  -15 12 41.76  21.1w 20RP11    F51  C~5HP7      
2021 11  28.43706  03 02 19.766  -15 12 41.97  21.3w 20RP11    F51  C~5HP7      
2021 11  28.44907  03 02 19.535  -15 12 42.50  21.3w 20RP11    F51  C~5HP7      
2021 11  28.46114  03 02 19.315  -15 12 42.73  21.1w 20RP11    F51  C~5HP7      

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    -0.17       0.00     0.32
     2   0.0000     -2.20     0.06      -3.13     0.02
     3   0.0001     -4.90    -0.18      -5.99     0.03
     4   0.0001     -5.09     0.25      -6.81    -0.07
     5   0.0001     -7.40     0.11      -9.58    -0.32
     6   0.0001     -9.98    -0.31     -12.00    -0.24
     7   0.0002    -12.15    -0.32     -14.52    -0.26
     8   0.0221  -1755.89     0.06   -1843.13    -0.01
     9   0.0221  -1759.36     0.01   -1846.24    -0.16
    10   0.0221  -1762.93    -0.12   -1848.87     0.20
    11   0.0491  -4481.90    -0.02   -3987.54     0.05
    12   0.0492  -4485.64    -0.19   -3989.80     0.14
    13   0.0492  -4492.72    -0.13   -3994.59     0.06
    14   0.0601  -5736.86    -0.00   -4808.77     0.08
    15   0.0601  -5740.60     0.08   -4811.17    -0.04
    16   0.0602  -5748.16     0.19   -4815.64     0.06
    17   0.0626  -6030.38    -0.04   -4990.49     0.16
    18   0.0626  -6034.95    -0.05   -4993.25     0.10
    19   0.0627  -6039.66    -0.18   -4996.26    -0.20
    20   0.0654  -6367.25    -0.05   -5193.92    -0.14
    21   0.0654  -6373.00    -0.00   -5196.95     0.17
    22   0.0655  -6378.76     0.04   -5200.12     0.33
    23   0.0655  -6384.70    -0.10   -5203.82    -0.06
    24   0.0735  -7356.97    -0.08   -5765.27     0.10
    25   0.0735  -7362.33     0.48   -5768.65    -0.06
    26   0.0736  -7368.72     0.03   -5771.96    -0.15
    27   0.0736  -7374.34     0.33   -5775.63    -0.63
    28   0.1204 -13452.55    -0.41   -8650.26    -0.44
    29   0.1338 -15195.53     0.16   -9323.34    -0.07
    30   0.1338 -15199.82     0.07   -9324.70     0.05
    31   0.1338 -15203.84     0.25   -9326.26    -0.04
    32   0.1339 -15208.07     0.21   -9327.73    -0.04
    33   0.1449 -16599.46    -0.11   -9824.34    -0.00
    34   0.1449 -16603.36    -0.12   -9825.51     0.09
    35   0.1449 -16607.14    -0.00   -9826.76     0.10
    36   0.1450 -16611.10    -0.08   -9828.03     0.09
    37   0.1471 -16877.54    -0.04   -9919.59     0.34
    38   0.1471 -16878.59     0.53   -9919.81     0.64
    39   0.1471 -16880.75    -0.11   -9921.53    -0.58
    40   0.1610 -18543.86     0.34  -10463.01     0.19
    41   0.1610 -18548.46    -0.28  -10464.01     0.37
    42   0.1611 -18552.27    -0.11  -10465.55     0.01
    43   1.0981 121444.51     0.23  -76457.29    -0.31
    44   1.0981 121441.12     0.61  -76460.76    -0.32
    45   1.0982 121436.86     0.11  -76463.99    -0.11
    46   1.1086 120213.76    -0.82  -77532.65    -0.14
    47   1.1086 120209.25    -0.36  -77536.37    -0.19
    48   1.1087 120204.60    -0.02  -77539.88    -0.02
    49   1.1446 115055.62     0.34  -80322.09     0.09
    50   1.1446 115050.63     0.26  -80323.86    -0.04
    51   1.1446 115045.41    -0.02  -80325.40     0.08
    52   1.1908 107222.87    -0.06  -81791.29     0.03
    53   1.1909 107211.07    -0.17  -81791.35     0.21
    54   1.1909 107205.32    -0.06  -81791.46     0.22
    55   1.2100 103951.01     0.12  -81725.96     0.16
    56   1.2100 103940.74     0.17  -81725.35    -0.18
    57   1.2591  96586.87    -0.39  -80065.31    -0.27
    58   1.2591  96582.76    -0.08  -80062.92     0.28
    59   1.2592  96578.38    -0.05  -80061.04     0.31
    60   1.2674  95577.18     0.02  -79614.35     0.04
    61   1.2674  95573.36     0.15  -79612.34     0.10
    62   1.2675  95569.18    -0.07  -79610.55    -0.07
    63   1.2675  95565.35     0.07  -79608.56    -0.04

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.

20RP11    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        22.501    22.506    22.495
ecceobj         0.737     0.737     0.737
incobj         30.366    30.367    30.366
qmin            5.913     5.914     5.911
qmax           39.832    41.277    41.267
amean          20.928    21.873    21.695
amin           17.743    19.805    20.349
amax           22.917    23.690    23.641
emean           0.699     0.722     0.714
emin            0.626     0.696     0.685
emax            0.738     0.742     0.746
imean          31.285    30.268    30.239
imin           29.460    29.350    29.280
imax           33.825    31.127    31.014
excite_mean     0.871     0.881     0.874
fracstop        0.006     0.003     0.003
cjmean          2.463     2.402     2.421

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       247.5     244.7     246.9
kozaiamp         10.3      11.8      10.8