Orbit Fit and Astrometric record for 17QF33

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: 17QF33    
# Created Sat Dec  4 02:14:01 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     68 observations of     68
# Arc:   4.14y
# First observation: 2016/08/07
#  Last observation: 2020/09/26
# Chi-squared of fit:   227.84 DOF:    130 RMS:  0.32
# Min/Max residuals:    -1.79    0.82
# Exact a, adot, b, bdot, g, gdot:
  3.968309E-05  3.389880E-01  8.379564E-07 -2.649296E-03  1.356708E-01 -1.765827E-01
# Covariance matrix:
  5.8344E-09 -5.9227E-05 -6.4327E-11  6.5324E-07 -3.0862E-13 -4.3330E-05
 -5.9227E-05  1.8689E+02  6.5327E-07 -2.0580E+00  3.9786E-09  1.5601E+02
 -6.4327E-11  6.5327E-07  1.5678E-12  9.1417E-09  3.4032E-15  4.7779E-07
  6.5324E-07 -2.0580E+00  9.1417E-09  2.7191E-01 -4.3869E-11 -1.7202E+00
 -3.0862E-13  3.9786E-09  3.4032E-15 -4.3869E-11  1.6331E-17  2.9984E-09
 -4.3330E-05  1.5601E+02  4.7779E-07 -1.7202E+00  2.9984E-09  1.3041E+02
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.563867  -70.564729   -0.442495    0.056869   -0.911322  2457607.842759
# Heliocentric elements and errors
Epoch:              2457608.5000  =  2016/08/08
Mean Anomaly:          352.82967 +/-     0.000
Argument of Peri:      163.02577 +/-     0.000
Long of Asc Node:      188.16356 +/-     0.000
Inclination:             3.26770 +/-     0.000
Eccentricity:         0.73412423 +/-   39.6632
Semi-Major Axis:     24.84562761 +/-    0.0000
Time of Perihelion: 2458509.4697 +/-       0.0
Perihelion:           6.60585032 +/-  985.4566
Aphelion:            43.08540490 +/-  985.4566
Period (y)              123.8463 +/-      0.00
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            3.16552436 +/-    0.0000
Ecliptic Y           -7.65400379 +/-    0.0000
Ecliptic Z            0.45823347 +/-    0.0000
Ecliptic XDOT         0.00527004 +/-    0.0002
Ecliptic YDOT         0.00562000 +/-    0.0001
Ecliptic ZDOT        -0.00027489 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    8.29557156 +/-    0.0000
Geocenter to KBO      7.37096995 +/-    0.0000
# Hcoef: 13.06

The following table shows the complete astrometric record for 17QF33. 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 (17QF33) followed by the observatory code and reference code for the source of the astrometry.

2016 08  07.34197  19 21 59.908  -18 30 10.71  22.2G 17QF33    F51  C~2jiV      
2016 08  07.35407  19 21 59.687  -18 30 11.27  22.3G 17QF33    F51  C~2jiV      
2016 08  07.36619  19 21 59.487  -18 30 11.79  22.3G 17QF33    F51  C~2jiV      
2016 08  07.37832  19 21 59.278  -18 30 12.46  22.2G 17QF33    F51  C~2jiV      
2017 07  01.56912  21 06 33.561  -13 18 54.83  22.0w 17QF33    F51  C~2Jz4      
2017 07  01.57883  21 06 33.432  -13 18 55.42  22.3w 17QF33    F51  C~2Jz4      
2017 07  01.58860  21 06 33.317  -13 18 55.72  22.4w 17QF33    F51  C~2Jz4      
2017 07  01.59828  21 06 33.188  -13 18 56.13  22.1w 17QF33    F51  C~2Jz4      
2017 07  15.58441  21 03 11.799  -13 32 14.46  21.4i 17QF33    F51  C~2Jz4      
2017 07  15.59700  21 03 11.554  -13 32 15.54  21.3i 17QF33    F51  C~2Jz4      
2017 07  26.45586  20 59 59.518  -13 46 05.21  21.5w 17QF33    F51  C~2Y59      
2017 07  26.46683  20 59 59.319  -13 46 06.21  21.5w 17QF33    F51  C~2Y59      
2017 07  26.47780  20 59 59.099  -13 46 06.90  21.5w 17QF33    F51  C~2Y59      
2017 07  26.48876  20 59 58.900  -13 46 07.79  21.7w 17QF33    F51  C~2Y59      
2017 07  30.44426  20 58 44.271  -13 51 42.26  22.2w 17QF33    F51  C~2Jz4      
2017 07  30.45523  20 58 44.052  -13 51 43.34  22.0w 17QF33    F51  C~2Jz4      
2017 07  30.46620  20 58 43.834  -13 51 44.23  21.7w 17QF33    F51  C~2Jz4      
2017 07  30.47717  20 58 43.616  -13 51 45.14  21.7w 17QF33    F51  C~2Jz4      
2017 08  16.32286  20 53 21.636  -14 17 04.26  21.5w 17QF33    F51  C~2Jz4      
2017 08  16.33501  20 53 21.421  -14 17 05.42  21.5w 17QF33    F51  C~2Jz4      
2017 08  16.34709  20 53 21.168  -14 17 06.65  21.7w 17QF33    F51  C~2Jz4      
2017 08  16.35913  20 53 20.941  -14 17 07.52  21.8w 17QF33    F51  C~2Jz4      
2017 08  23.346994 20 51 15.175  -14 27 39.94  21.4G 17QF33    568  C~2Jz4      
2017 08  23.348177 20 51 15.154  -14 27 40.07  21.5G 17QF33    568  C~2Jz4      
2017 08  23.349361 20 51 15.133  -14 27 40.18  21.4G 17QF33    568  C~2Jz4      
2017 08  26.30985  20 50 24.966  -14 32 01.14  21.5w 17QF33    F51  C~2Y59      
2017 08  26.32388  20 50 24.736  -14 32 02.19  21.5w 17QF33    F51  C~2Y59      
2017 08  26.33794  20 50 24.496  -14 32 03.20  21.6w 17QF33    F51  C~2Y59      
2017 08  30.27804  20 49 21.34   -14 37 41.0   21.0R 17QF33    291  C~2Jz4      
2017 08  30.32805  20 49 20.56   -14 37 45.5   21.2R 17QF33    291  C~2Jz4      
2017 08  30.37351  20 49 19.84   -14 37 48.9   21.3R 17QF33    291  C~2Jz4      
2017 09  14.31804  20 46 09.568  -14 56 39.84  21.4G 17QF33    F51  C~2jiV      
2017 09  14.33061  20 46 09.443  -14 56 40.62  21.8G 17QF33    F51  C~2jiV      
2017 09  14.34319  20 46 09.306  -14 56 41.43  21.7G 17QF33    F51  C~2jiV      
2017 09  14.35575  20 46 09.188  -14 56 42.27  21.7G 17QF33    F51  C~2jiV      
2017 09  24.25268  20 44 55.960  -15 06 15.02  22.2G 17QF33    F51  C~2jiV      
2017 09  24.26243  20 44 55.917  -15 06 15.62  21.6G 17QF33    F51  C~2jiV      
2017 09  27.17101  20 44 43.64   -15 08 31.2   22.4R 17QF33    291  C~2LVP      
2017 09  27.20697  20 44 43.47   -15 08 32.9   22.1R 17QF33    291  C~2LVP      
2017 09  27.23703  20 44 43.35   -15 08 34.4         17QF33    291  C~2LVP      
2017 10  12.22436  20 44 52.003  -15 15 49.53  21.7G 17QF33    F51  C~2jiV      
2017 10  12.23664  20 44 52.058  -15 15 49.62  21.6G 17QF33    F51  C~2jiV      
2017 10  12.24890  20 44 52.102  -15 15 49.74  21.9G 17QF33    F51  C~2jiV      
2017 10  12.26121  20 44 52.153  -15 15 49.89  21.7G 17QF33    F51  C~2jiV      
2018 09  04.10006  22 43 51.69   -06 06 17.6   20.8R 17QF33    W49  C~2jiV      
2018 09  04.15239  22 43 50.60   -06 06 25.9   20.2R 17QF33    W49  C~2jiV      
2018 09  04.34068  22 43 47.17   -06 06 49.3   20.1R 17QF33    U69  C~2kSs      
2018 09  04.35186  22 43 46.97   -06 06 50.3         17QF33    U69  C~2kSs      
2018 09  05.16059  22 43 31.99   -06 08 34.9   20.6R 17QF33    W49  C~2jiV      
2018 09  05.20535  22 43 31.12   -06 08 41.3   20.7R 17QF33    W49  C~2jiV      
2018 09  05.24580  22 43 30.46   -06 08 47.7   20.2R 17QF33    W49  C~2jiV      
2018 09  05.39315  22 43 27.80   -06 09 06.1   20.2R 17QF33    U69  C~2kSs      
2018 09  05.41299  22 43 27.39   -06 09 08.0         17QF33    U69  C~2kSs      
2019 06  11.58604  00 35 42.253  +04 14 14.75  22.0w 17QF33    F51  C~36sl      
2019 06  11.59119  00 35 42.414  +04 14 16.00  21.7w 17QF33    F51  C~36sl      
2019 06  11.59635  00 35 42.530  +04 14 16.49  22.0w 17QF33    F51  C~36sl      
2019 06  11.60150  00 35 42.678  +04 14 17.45  21.6w 17QF33    F51  C~36sl      
2019 09  27.44425  00 39 15.521  +04 07 13.42  21.2w 17QF33    F51  C~3JGZ      
2019 09  27.45566  00 39 15.304  +04 07 11.74  21.4w 17QF33    F51  C~3JGZ      
2019 09  27.46702  00 39 15.078  +04 07 10.33  21.2w 17QF33    F51  C~3JGZ      
2019 09  27.47838  00 39 14.873  +04 07 08.96  21.3w 17QF33    F51  C~3JGZ      
2019 11  01.36607  00 29 28.619  +02 53 54.59  21.2w 17QF33    F52  C~3Q7M      
2019 11  01.38956  00 29 28.301  +02 53 52.22  21.4w 17QF33    F52  C~3Q7M      
2019 11  01.40129  00 29 28.116  +02 53 51.22  21.7w 17QF33    F52  C~3Q7M      
2020 09  26.57303  02 26 33.121  +12 48 19.10  21.9w 17QF33    F51  C~4AVY      
2020 09  26.58749  02 26 32.933  +12 48 17.50  22.0w 17QF33    F51  C~4AVY      
2020 09  26.60191  02 26 32.731  +12 48 16.33  21.9w 17QF33    F51  C~4AVY      
2020 09  26.61632  02 26 32.539  +12 48 15.24  21.7w 17QF33    F51  C~4AVY      

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    -0.00       0.00    -0.24
     2   0.0000      0.00    -0.29       0.00    -0.23
     3   0.0001      0.00    -0.25       0.00    -0.18
     4   0.0001      0.00    -0.35       0.00    -0.28
     5   0.8986      0.00    -0.01       0.00     0.22
     6   0.8987      0.00    -0.12       0.00     0.05
     7   0.8987      0.00    -0.00       0.00     0.17
     8   0.8987      0.00    -0.12       0.00     0.18
     9   0.9370      0.00     0.22       0.00     0.29
    10   0.9370      0.00    -0.25       0.00     0.06
    11   0.9668      0.00     0.01       0.00    -0.07
    12   0.9668      0.00     0.19       0.00    -0.16
    13   0.9668      0.00     0.05       0.00     0.05
    14   0.9669      0.00     0.22       0.00     0.07
    15   0.9777      0.00     0.03       0.00     0.30
    16   0.9777      0.00    -0.03       0.00     0.17
    17   0.9778      0.00    -0.07       0.00     0.23
    18   0.9778      0.00    -0.11       0.00     0.26
    19   1.0239      0.00    -0.00       0.00     0.08
    20   1.0239      0.00     0.25       0.00     0.04
    21   1.0240      0.00    -0.08       0.00    -0.08
    22   1.0240      0.00    -0.03       0.00     0.16
    23   1.0431      0.00     0.07       0.00    -0.07
    24   1.0431      0.00     0.07       0.00    -0.09
    25   1.0431      0.00     0.07       0.00    -0.10
    26   1.0512      0.00    -0.03       0.00    -0.13
    27   1.0513      0.00     0.12       0.00     0.05
    28   1.0513      0.00     0.13       0.00     0.28
    29   1.0621      0.00    -0.08       0.00     0.16
    30   1.0622      0.00     0.14       0.00    -0.18
    31   1.0624      0.00     0.12       0.00     0.18
    32   1.1033      0.00     0.08       0.00    -0.13
    33   1.1033      0.00     0.15       0.00    -0.08
    34   1.1034      0.00     0.03       0.00    -0.07
    35   1.1034      0.00     0.20       0.00    -0.09
    36   1.1305      0.00    -0.02       0.00     0.02
    37   1.1305      0.00     0.14       0.00    -0.09
    38   1.1385      0.00     0.40       0.00     0.36
    39   1.1386      0.00    -0.02       0.00     0.23
    40   1.1387      0.00    -0.06       0.00     0.03
    41   1.1797      0.00     0.08       0.00    -0.14
    42   1.1797      0.00     0.15       0.00    -0.07
    43   1.1798      0.00     0.05       0.00    -0.02
    44   1.1798      0.00     0.05       0.00    -0.01
    45   2.0746      0.00     0.65       0.00     0.39
    46   2.0748      0.00    -0.90       0.00    -1.11
    47   2.0753      0.00     0.27       0.00    -0.16
    48   2.0753      0.00     0.45       0.00     0.29
    49   2.0775      0.00    -1.44       0.00     0.54
    50   2.0777      0.00    -1.79       0.00    -0.05
    51   2.0778      0.00    -0.22       0.00    -1.21
    52   2.0782      0.00     0.82       0.00    -0.55
    53   2.0782      0.00     0.28       0.00     0.12
    54   2.8426      0.00    -0.18       0.00    -0.22
    55   2.8426      0.00     0.20       0.00     0.22
    56   2.8426      0.00    -0.10       0.00    -0.10
    57   2.8426      0.00     0.09       0.00     0.05
    58   3.1379      0.00     0.22       0.00     0.12
    59   3.1379      0.00     0.19       0.00    -0.02
    60   3.1379      0.00     0.00       0.00     0.11
    61   3.1380      0.00     0.13       0.00     0.28
    62   3.2335      0.00     0.38       0.00     0.07
    63   3.2335      0.00     0.31       0.00     0.03
    64   3.2336      0.00    -0.12       0.00     0.19
    65   4.1375      0.00    -0.11       0.00     0.17
    66   4.1376      0.00    -0.00       0.00    -0.18
    67   4.1376      0.00    -0.11       0.00    -0.11
    68   4.1376      0.00    -0.08       0.00     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.

17QF33    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        24.803    24.803    24.803
ecceobj         0.736     0.736     0.736
incobj          3.280     3.280     3.280
qmin            6.278     6.367     6.552
qmax           59.075   349.231    43.054
amean          29.934    91.062    24.803
amin           24.377    24.582    24.803
amax           32.719   178.052    24.803
emean           0.784     0.913     0.736
emin            0.733     0.735     0.736
emax            0.805     0.961     0.736
imean           3.492     3.972     3.402
imin            3.267     3.300     3.402
imax            4.070     4.464     3.402
excite_mean     0.786     0.915     0.738
fracstop        0.001     0.011     0.000
cjmean          2.246     1.698     2.442

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       193.4     216.6     163.1
kozaiamp         31.3      37.6       0.0