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 Thu Oct 18 01:10:00 2018
# Orbit generated from Bernstein formalism
# Fitting   45 observations of   53
# Arc:   2.07y
# First observation: 2016/08/07
#  Last observation: 2018/09/04
Preliminary a, adot, b, bdot, g, gdot:
  -0.075745   0.505752   0.000170  -0.002460   0.208522   0.000000
# Chi-squared of fit:    52.40 DOF:   84 RMS:  0.19
# Min/Max residuals:    -0.72    0.39
# Exact a, adot, b, bdot, g, gdot:
  3.855049E-05  3.389797E-01  1.888820E-06 -2.650177E-03  1.356728E-01 -1.765768E-01
# Covariance matrix:
  3.6676E-13 -4.5100E-13 -1.2953E-15  1.6655E-15 -7.9895E-14 -2.0226E-13
 -4.5100E-13  6.2840E-13  2.1982E-15 -2.9139E-15  1.2321E-13  3.3603E-13
 -1.2953E-15  2.1982E-15  1.9209E-13 -1.6465E-13 -2.9274E-16  2.0070E-15
  1.6655E-15 -2.9139E-15 -1.6465E-13  1.5835E-13  1.4104E-15 -3.1733E-15
 -7.9895E-14  1.2321E-13 -2.9274E-16  1.4104E-15  1.2850E-13  3.9801E-14
 -2.0226E-13  3.3603E-13  2.0070E-15 -3.1733E-15  3.9801E-14  2.6439E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
    3.563867  -70.564729   -0.442495    0.056870   -0.911322  2457607.842759
# Heliocentric elements and errors
Epoch:              2457600.5000  =  2016/07/31
Mean Anomaly:          352.75996 +/-     0.000
Argument of Peri:      163.03376 +/-     0.001
Long of Asc Node:      188.16151 +/-     0.001
Inclination:             3.26778 +/-     0.000
Eccentricity:         0.73400333 +/-    0.0000
Semi-Major Axis:     24.83343576 +/-    0.0009
Time of Perihelion: 2458509.5595 +/-       0.0
Perihelion:           6.60561113 +/-    0.0003
Aphelion:            43.06126040 +/-    0.0016
Period (y)              123.7552 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X            3.16547996 +/-    0.0000
Ecliptic Y           -7.65390304 +/-    0.0000
Ecliptic Z            0.45823439 +/-    0.0000
Ecliptic XDOT         0.00526985 +/-    0.0000
Ecliptic YDOT         0.00561975 +/-    0.0000
Ecliptic ZDOT        -0.00027490 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO    8.29532844 +/-    0.0000
Geocenter to KBO      7.37067318 +/-    0.0000
# Hcoef: 13.16

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      

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     0.20       0.00    -0.45
  2   0.0000     -3.19    -0.07      -0.12    -0.40
  3   0.0001     -6.08    -0.03      -0.23    -0.36
  4   0.0001     -9.12    -0.13      -0.48    -0.44
  5   0.8986  99010.04     0.08    -361.78     0.22
  6   0.8987  99007.61    -0.10    -361.86     0.07
  7   0.8987  99005.52     0.08    -361.69     0.17
  8   0.8987  99003.15    -0.05    -361.58     0.21
  9   0.9370  95282.98     0.32    -359.36     0.23
 10   0.9370  95278.46    -0.28    -359.48     0.13
 11   0.9668  91759.98    -0.15    -441.11    -0.08
 12   0.9668  91756.31     0.02    -441.34    -0.22
 13   0.9668  91752.39    -0.07    -441.17     0.05
 14   0.9669  91748.76     0.13    -441.29     0.01
 15   0.9777  90390.73     0.03    -488.51     0.32
 16   0.9777  90386.72    -0.07    -488.76     0.19
 17   0.9778  90382.79    -0.10    -488.81     0.26
 18   0.9778  90378.86    -0.13    -488.88     0.31
 19   1.0239  84577.61    -0.11    -789.52     0.10
 20   1.0239  84573.74     0.16    -789.88    -0.01
 21   1.0240  84569.22    -0.24    -790.17    -0.04
 22   1.0240  84565.23    -0.11    -790.18     0.20
 23   1.0431  82322.33     0.03    -955.63    -0.07
 24   1.0431  82321.95     0.02    -955.69    -0.09
 25   1.0431  82321.57     0.02    -955.72    -0.10
 26   1.0512  81429.65    -0.06   -1031.85    -0.10
 27   1.0513  81425.61     0.16   -1032.05     0.05
 28   1.0513  81421.42     0.23   -1032.17     0.28
 29   1.0621  80300.19     0.02   -1138.50     0.21
 30   1.0622  80286.28     0.16   -1140.16    -0.20
 31   1.0624  80273.65     0.24   -1140.91     0.18
 32   1.1033  76892.60     0.04   -1584.12    -0.12
 33   1.1033  76890.38     0.12   -1584.45    -0.09
 34   1.1034  76887.96     0.01   -1584.77    -0.04
 35   1.1034  76885.84     0.18   -1585.19    -0.10
 36   1.1305  75558.21    -0.19   -1899.76     0.07
 37   1.1305  75557.36    -0.05   -1900.21    -0.09
 38   1.1385  75324.62     0.39   -1993.85     0.32
 39   1.1386  75321.44    -0.09   -1994.96     0.29
 40   1.1387  75319.12    -0.19   -1996.06     0.09
 41   1.1797  75337.70    -0.14   -2477.90    -0.12
 42   1.1797  75338.55    -0.05   -2478.21    -0.06
 43   1.1798  75339.22    -0.14   -2478.50     0.02
 44   1.1798  75339.99    -0.14   -2478.84     0.03
 45   2.0746 251607.20 (   4.83)  -2603.30 (   0.69)
 46   2.0748 251562.20    -0.01   -2606.89    -0.72
 47   2.0753 251422.90 (   3.51)  -2614.12 (   0.08)
 48   2.0753 251415.08 (   4.29)  -2614.00 (   0.65)
 49   2.0775 250805.83 (   0.13)  -2649.13 (   2.01)
 50   2.0777 250770.23 (  -1.18)  -2651.66 (   1.33)
 51   2.0778 250741.97 (   1.53)  -2655.85 (  -1.22)
 52   2.0782 250634.15 (   4.49)  -2661.83 (  -0.80)
 53   2.0782 250618.30 (   3.78)  -2661.36 (   0.47)

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        24.792    24.793    24.791
ecceobj         0.736     0.736     0.736
incobj          3.280     3.280     3.280
qmin            6.552     6.521     6.552
qmax           43.032    43.035    43.030
amean          24.190    22.961    24.149
amin           23.587    20.389    23.506
amax           24.792    24.794    24.791
emean           0.726     0.711     0.725
emin            0.715     0.680     0.714
emax            0.736     0.736     0.736
imean           3.412     3.417     3.400
imin            3.402     3.402     3.398
imax            3.423     3.439     3.402
excite_mean     0.728     0.714     0.727
fracstop        0.000     0.000     0.000
cjmean          2.476     2.542     2.478

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       163.5     164.3     163.7
kozaiamp          0.4       1.3       0.6