Orbit Fit and Astrometric record for 17DN164

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: 17DN164   
# Created Thu Oct 31 01:10:33 2024
# Orbit generated from Bernstein formalism
# Fitting     43 observations of     43
# Arc:   1.87y
# First observation: 2016/03/04
#  Last observation: 2018/01/17
Preliminary a, adot, b, bdot, g, gdot:
   0.000020   0.023713   0.000004   0.007601   0.025739   0.000000
# Chi-squared of fit:    27.54 DOF:     80 RMS:  0.14
# Min/Max residuals:    -0.38    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.488021E-05  2.375731E-02  4.715581E-06  7.616002E-03  2.575083E-02 -7.944208E-04
# Covariance matrix:
  3.5167E-13 -4.7432E-13  3.5055E-14 -8.5073E-14 -1.5273E-13 -5.3620E-12
 -4.7432E-13  8.1254E-13 -7.4420E-14  1.8042E-13  3.3698E-13  1.1382E-11
  3.5055E-14 -7.4420E-14  2.1272E-13 -1.8458E-13 -4.9906E-14 -1.3567E-12
 -8.5073E-14  1.8042E-13 -1.8458E-13  2.0855E-13  1.1714E-13  3.2678E-12
 -1.5273E-13  3.3698E-13 -4.9906E-14  1.1714E-13  4.8884E-13  7.6005E-12
 -5.3620E-12  1.1382E-11 -1.3567E-12  3.2678E-12  7.6005E-12  2.0732E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -10.598063  150.617446   -0.226982   -0.176815   -0.945863  2457451.930568
# Heliocentric elements and errors
Epoch:              2457450.5000  =  2016/03/03
Mean Anomaly:          209.48790 +/-     0.511
Argument of Peri:      122.60373 +/-     0.508
Long of Asc Node:      180.18593 +/-     0.001
Inclination:            20.49118 +/-     0.001
Eccentricity:         0.05548891 +/-    0.0002
Semi-Major Axis:     37.92487176 +/-    0.0037
Time of Perihelion: 2493116.4287 +/-     120.9
Perihelion:          35.82046210 +/-    0.0101
Aphelion:            40.02928142 +/-    0.0102
Period (y)              233.5578 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -34.21494095 +/-    0.0009
Ecliptic Y           19.00028530 +/-    0.0005
Ecliptic Z           -7.14203980 +/-    0.0002
Ecliptic XDOT        -0.00129689 +/-    0.0000
Ecliptic YDOT        -0.00217562 +/-    0.0000
Ecliptic ZDOT         0.00081147 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.78293300 +/-    0.0008
Geocenter to KBO     38.83369330 +/-    0.0011
# Hcoef:  9.42

The following table shows the complete astrometric record for 17DN164. 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 (17DN164) followed by the observatory code and reference code for the source of the astrometry.

2016 03  04.429779 09 55 48.27   +01 19 23.9         17DN164   T09  C~81Bw      
2016 03  04.459022 09 55 48.13   +01 19 24.7         17DN164   T09  C~81Bw      
2016 03  09.294523 09 55 26.31   +01 22 10.6         17DN164   T09  C~81Bw      
2016 03  09.314927 09 55 26.21   +01 22 11.4         17DN164   T09  C~81Bw      
2017 01  21.48580  10 04 49.30   +00 55 47.3   24.8z 17DN164   T09  C~81Bw      
2017 01  21.51187  10 04 49.18   +00 55 48.1   24.7z 17DN164   T09  C~81Bw      
2017 01  21.56003  10 04 48.96   +00 55 49.1   24.7z 17DN164   T09  C~81Bw      
2017 01  23.41024  10 04 41.21   +00 56 25.4   25.3r 17DN164   T09  C~81Bw      
2017 01  23.52068  10 04 40.72   +00 56 27.8   24.7i 17DN164   T09  C~81Bw      
2017 01  23.56169  10 04 40.53   +00 56 28.3   25.1i 17DN164   T09  C~81Bw      
2017 01  23.59193  10 04 40.39   +00 56 29.1   25.0i 17DN164   T09  C~81Bw      
2017 02  02.52479  10 03 55.99   +01 00 15.1   25.4r 17DN164   T09  C~81Bw      
2017 02  02.57410  10 03 55.76   +01 00 16.2   25.1i 17DN164   T09  C~81Bw      
2017 02  02.58520  10 03 55.71   +01 00 16.6   25.2i 17DN164   T09  C~81Bw      
2017 02  23.33599  10 02 16.26   +01 10 20.0   26.3g 17DN164   T09  C~81Bw      
2017 02  23.46966  10 02 15.59   +01 10 24.4   25.7r 17DN164   T09  C~81Bw      
2017 02  23.48331  10 02 15.52   +01 10 24.7   25.3r 17DN164   T09  C~81Bw      
2017 02  23.49694  10 02 15.46   +01 10 25.4   25.2r 17DN164   T09  C~81Bw      
2017 02  23.51437  10 02 15.37   +01 10 25.7   25.6r 17DN164   T09  C~81Bw      
2017 03  04.29603  10 01 33.77   +01 15 18.3   24.9z 17DN164   T09  C~81Bw      
2017 03  04.34714  10 01 33.52   +01 15 20.1   24.8z 17DN164   T09  C~81Bw      
2017 03  04.48135  10 01 32.87   +01 15 24.4   25.5i 17DN164   T09  C~81Bw      
2017 03  04.50300  10 01 32.80   +01 15 24.9   24.9i 17DN164   T09  C~81Bw      
2017 03  22.39100  10 00 15.93   +01 25 45.5   25.1z 17DN164   T09  C~81Bw      
2017 03  22.46802  10 00 15.61   +01 25 48.1   25.1z 17DN164   T09  C~81Bw      
2017 03  22.48979  10 00 15.54   +01 25 49.2   24.7z 17DN164   T09  C~81Bw      
2017 03  23.25214  10 00 12.61   +01 26 15.4   25.1i 17DN164   T09  C~81Bw      
2017 03  23.27391  10 00 12.52   +01 26 16.0   25.0i 17DN164   T09  C~81Bw      
2017 03  25.24634  10 00 05.12   +01 27 24.1   25.8r 17DN164   T09  C~81Bw      
2017 03  25.26003  10 00 05.06   +01 27 24.9   25.3r 17DN164   T09  C~81Bw      
2017 03  25.28747  10 00 04.95   +01 27 25.4   25.3r 17DN164   T09  C~81Bw      
2017 03  29.26967  09 59 50.70   +01 29 41.9   25.9g 17DN164   T09  C~81Bw      
2017 03  29.29181  09 59 50.61   +01 29 42.7   26.0g 17DN164   T09  C~81Bw      
2017 03  29.29748  09 59 50.59   +01 29 43.0   26.4g 17DN164   T09  C~81Bw      
2017 03  29.30574  09 59 50.56   +01 29 43.4   26.4g 17DN164   T09  C~81Bw      
2017 03  29.31142  09 59 50.54   +01 29 43.2   26.0g 17DN164   T09  C~81Bw      
2018 01  17.46122  10 10 49.10   +00 50 34.0   25.4i 17DN164   T09  C~81Bw      
2018 01  17.46460  10 10 49.08   +00 50 33.8   25.9i 17DN164   T09  C~81Bw      
2018 01  17.49135  10 10 48.98   +00 50 34.5   25.3i 17DN164   T09  C~81Bw      
2018 01  17.51296  10 10 48.89   +00 50 35.0   25.1i 17DN164   T09  C~81Bw      
2018 01  17.54803  10 10 48.75   +00 50 35.5   25.5i 17DN164   T09  C~81Bw      
2018 01  17.57490  10 10 48.65   +00 50 36.0   25.2i 17DN164   T09  C~81Bw      
2018 01  17.59901  10 10 48.55   +00 50 36.3   24.8i 17DN164   T09  C~81Bw      

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    -0.06       0.00    -0.01
     2   0.0001     -2.25    -0.04       0.02    -0.21
     3   0.0133   -366.68     0.14      42.20    -0.06
     4   0.0134   -368.36    -0.00      42.43    -0.01
     5   0.8845   8105.45     0.09    1488.46    -0.09
     6   0.8846   8103.48    -0.14    1488.58     0.15
     7   0.8847   8100.03    -0.38    1488.37     0.14
     8   0.8897   7978.24     0.31    1482.00     0.27
     9   0.8901   7970.50     0.11    1481.70     0.38
    10   0.8902   7967.65     0.07    1481.18     0.01
    11   0.8902   7965.40    -0.12    1481.20     0.14
    12   0.9174   7261.48    -0.04    1461.68     0.11
    13   0.9176   7257.86     0.04    1461.52    -0.00
    14   0.9176   7257.01     0.04    1461.63     0.12
    15   0.9744   5647.19     0.14    1509.28    -0.03
    16   0.9748   5636.23    -0.10    1509.91    -0.04
    17   0.9748   5635.14    -0.09    1509.83    -0.19
    18   0.9749   5634.05    -0.09    1510.17     0.09
    19   0.9749   5632.68    -0.06    1509.99    -0.18
    20   0.9989   4945.57     0.10    1567.70     0.14
    21   0.9991   4941.43    -0.04    1568.08     0.14
    22   0.9995   4930.79    -0.17    1568.73    -0.19
    23   0.9995   4929.63     0.36    1568.83    -0.25
    24   1.0485   3632.55     0.10    1750.56     0.01
    25   1.0487   3627.15    -0.10    1751.33    -0.14
    26   1.0488   3625.78    -0.00    1752.00     0.27
    27   1.0508   3575.46    -0.14    1761.32    -0.02
    28   1.0509   3573.99    -0.16    1761.41    -0.19
    29   1.0563   3446.24     0.24    1786.75    -0.08
    30   1.0563   3445.12     0.01    1787.19     0.19
    31   1.0564   3443.40     0.08    1787.09    -0.26
    32   1.0673   3195.56     0.13    1840.92    -0.03
    33   1.0674   3194.01    -0.05    1841.20    -0.04
    34   1.0674   3193.63    -0.09    1841.38     0.06
    35   1.0674   3193.07    -0.14    1841.60     0.17
    36   1.0674   3192.86     0.00    1841.31    -0.20
    37   1.8728  13289.09     0.06    3074.62    -0.00
    38   1.8728  13288.87     0.06    3074.33    -0.28
    39   1.8729  13287.22     0.05    3074.46    -0.01
    40   1.8729  13285.77    -0.07    3074.46     0.09
    41   1.8730  13283.62    -0.05    3074.20     0.00
    42   1.8731  13282.03     0.02    3074.14     0.08
    43   1.8732  13280.52    -0.01    3073.90    -0.05

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.

17DN164    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        37.771    37.780    37.761
ecceobj         0.059     0.059     0.059
incobj         20.570    20.570    20.570
qmin           34.415    34.540    34.183
qmax           41.326    41.198    41.584
amean          37.774    37.789    37.783
amin           37.463    37.491    37.467
amax           38.084    38.086    38.097
emean           0.056     0.057     0.063
emin            0.022     0.030     0.027
emax            0.086     0.083     0.093
imean          21.172    21.145    21.237
imin           19.825    19.835    19.827
imax           22.902    22.817    22.957
excite_mean     0.366     0.365     0.368
fracstop        1.000     1.000     1.000
cjmean          2.884     2.885     2.882

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       180.1     179.7     184.8
kozaiamp        179.9     180.0     180.0