Orbit Fit and Astrometric record for 17DV159

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: 17DV159   
# Created Tue Apr  1 01:11:03 2025
# Orbit generated from Bernstein formalism
# Fitting     47 observations of     55
# Arc:   2.99y
# First observation: 2015/01/21
#  Last observation: 2018/01/17
Preliminary a, adot, b, bdot, g, gdot:
   0.000008   0.008782   0.000022   0.005504   0.015718   0.000000
# Chi-squared of fit:    37.70 DOF:     88 RMS:  0.16
# Min/Max residuals:    -0.47    0.36
# Exact a, adot, b, bdot, g, gdot:
  9.237674E-06  8.817198E-03  6.044330E-06  5.532807E-03  1.579324E-02  1.619688E-03
# Covariance matrix:
  5.5890E-13 -4.0013E-13  5.9521E-14 -1.1664E-13 -2.3340E-13 -7.3463E-12
 -4.0013E-13  5.7900E-13 -1.5538E-13  3.0621E-13  7.0553E-13  1.9315E-11
  5.9521E-14 -1.5538E-13  5.3826E-13 -3.2949E-13 -2.2936E-13 -6.4752E-12
 -1.1664E-13  3.0621E-13 -3.2949E-13  3.1528E-13  4.5427E-13  1.2748E-11
 -2.3340E-13  7.0553E-13 -2.2936E-13  4.5427E-13  1.1703E-12  2.8694E-11
 -7.3463E-12  1.9315E-11 -6.4752E-12  1.2748E-11  2.8694E-11  8.0389E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
  -10.851027  151.335452    0.497863   -0.159196   -0.831341  2457044.084683
# Heliocentric elements and errors
Epoch:              2457040.5000  =  2015/01/18
Mean Anomaly:          144.12207 +/-     0.344
Argument of Peri:      180.62267 +/-     0.335
Long of Asc Node:      167.52522 +/-     0.001
Inclination:            33.43610 +/-     0.002
Eccentricity:         0.30758156 +/-    0.0007
Semi-Major Axis:     50.42098900 +/-    0.0198
Time of Perihelion: 2404687.2736 +/-     121.2
Perihelion:          34.91242236 +/-    0.0366
Aphelion:            65.92955565 +/-    0.0427
Period (y)              358.0348 +/-      0.21
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -55.07192591 +/-    0.0037
Ecliptic Y           30.67260926 +/-    0.0020
Ecliptic Z          -11.91968148 +/-    0.0008
Ecliptic XDOT        -0.00113745 +/-    0.0000
Ecliptic YDOT        -0.00112767 +/-    0.0000
Ecliptic ZDOT         0.00088923 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   64.15453834 +/-    0.0034
Geocenter to KBO     63.31823316 +/-    0.0043
# Hcoef:  7.13

The following table shows the complete astrometric record for 17DV159. 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 (17DV159) followed by the observatory code and reference code for the source of the astrometry.

2015 01  21.583905 09 58 05.91   +00 50 26.6         17DV159   T09  C~81Bu      
2015 01  21.661564 09 58 05.70   +00 50 27.6         17DV159   T09  C~81Bu      
2016 03  04.429779 09 58 15.71   +01 10 54.3         17DV159   T09  C~81Bu      
2016 03  04.459022 09 58 15.61   +01 10 55.0         17DV159   T09  C~81Bu      
2016 12  25.54616  10 03 46.27   +01 00 58.9   25.8r 17DV159   T09  C~7ujJ      
2016 12  25.59402  10 03 46.20   +01 00 59.2   26.0i 17DV159   T09  C~7ujJ      
2016 12  25.61625  10 03 46.26   +01 00 59.7   25.5i 17DV159   T09  C~7ujJ      
2017 01  21.44099  10 02 45.38   +01 04 50.8   25.6z 17DV159   T09  C~7ujJ      
2017 01  21.45826  10 02 45.33   +01 04 51.0   26.0z 17DV159   T09  C~7ujJ      
2017 01  21.48580  10 02 45.26   +01 04 51.5   25.7z 17DV159   T09  C~7ujJ      
2017 01  21.53790  10 02 45.11   +01 04 52.0   24.9z 17DV159   T09  C~7ujJ      
2017 01  21.56003  10 02 45.04   +01 04 52.3   25.3z 17DV159   T09  C~7ujJ      
2017 01  21.57598  10 02 45.01   +01 04 52.7   25.6z 17DV159   T09  C~7ujJ      
2017 01  21.59481  10 02 44.95   +01 04 52.8   24.8z 17DV159   T09  C~7ujJ      
2017 01  23.36273  10 02 40.05   +01 05 17.0   25.6r 17DV159   T09  C~7ujJ      
2017 01  23.39642  10 02 39.96   +01 05 17.2   25.0r 17DV159   T09  C~7ujJ      
2017 01  23.41024  10 02 39.90   +01 05 17.7   25.4r 17DV159   T09  C~7ujJ      
2017 01  23.52068  10 02 39.57   +01 05 19.2   24.7i 17DV159   T09  C~7ujJ      
2017 01  23.56169  10 02 39.46   +01 05 19.9   25.0i 17DV159   T09  C~7ujJ      
2017 01  23.59193  10 02 39.38   +01 05 19.9   24.3i 17DV159   T09  C~7ujJ      
2017 01  30.41709  10 02 19.50   +01 07 03.5   25.2i 17DV159   T09  C~7ujJ      
2017 01  30.43912  10 02 19.43   +01 07 03.6   25.9i 17DV159   T09  C~7ujJ      
2017 01  30.46126  10 02 19.34   +01 07 03.8   25.6i 17DV159   T09  C~7ujJ      
2017 01  30.50547  10 02 19.23   +01 07 04.6   25.8z 17DV159   T09  C~7ujJ      
2017 02  21.35310  10 01 11.20   +01 13 55.9   25.2z 17DV159   T09  C~7ujJ      
2017 02  21.40442  10 01 11.04   +01 13 56.9   24.7z 17DV159   T09  C~7ujJ      
2017 02  21.42640  10 01 10.99   +01 13 57.3   25.4z 17DV159   T09  C~7ujJ      
2017 02  23.32237  10 01 05.00   +01 14 37.4   25.9g 17DV159   T09  C~7ujJ      
2017 02  23.33599  10 01 04.96   +01 14 37.8   26.1g 17DV159   T09  C~7ujJ      
2017 02  23.46966  10 01 04.56   +01 14 40.8   25.3r 17DV159   T09  C~7ujJ      
2017 02  23.48331  10 01 04.51   +01 14 40.8   25.5r 17DV159   T09  C~7ujJ      
2017 02  23.49694  10 01 04.50   +01 14 40.8   25.0r 17DV159   T09  C~7ujJ      
2017 02  23.51437  10 01 04.42   +01 14 41.5   25.7r 17DV159   T09  C~7ujJ      
2017 03  04.31803  10 00 37.20   +01 17 54.9   25.2z 17DV159   T09  C~7ujJ      
2017 03  04.34360  10 00 37.12   +01 17 55.2   24.5z 17DV159   T09  C~7ujJ      
2017 03  04.45958  10 00 36.76   +01 17 57.9   25.1i 17DV159   T09  C~7ujJ      
2017 03  04.47782  10 00 36.70   +01 17 58.3   25.0i 17DV159   T09  C~7ujJ      
2017 03  22.29763  09 59 46.43   +01 24 44.1   25.3g 17DV159   T09  C~7ujJ      
2017 03  22.39100  09 59 46.20   +01 24 46.4   24.7z 17DV159   T09  C~7ujJ      
2017 03  22.41670  09 59 46.12   +01 24 47.1   25.5z 17DV159   T09  C~7ujJ      
2017 03  22.44235  09 59 46.09   +01 24 47.6   24.9z 17DV159   T09  C~7ujJ      
2017 03  25.26003  09 59 38.99   +01 25 51.4   25.1r 17DV159   T09  C~7ujJ      
2017 03  25.27375  09 59 38.98   +01 25 52.1   25.6r 17DV159   T09  C~7ujJ      
2017 03  25.28747  09 59 38.93   +01 25 52.4   25.9r 17DV159   T09  C~7ujJ      
2017 03  30.31998  09 59 27.07   +01 27 46.4   21.9y 17DV159   T09  C~83F2      
2017 03  30.32381  09 59 27.07   +01 27 46.2   22.1y 17DV159   T09  C~83F2      
2017 03  30.32764  09 59 27.07   +01 27 46.2   22.3y 17DV159   T09  C~83F2      
2017 03  30.33147  09 59 27.07   +01 27 46.2   22.2y 17DV159   T09  C~83F2      
2017 03  30.33530  09 59 27.08   +01 27 46.5   22.2y 17DV159   T09  C~83F2      
2017 04  23.24251  09 58 46.20   +01 35 59.1   25.9r 17DV159   T09  C~7ujJ      
2017 04  23.25417  09 58 46.19   +01 35 59.5   26.2r 17DV159   T09  C~7ujJ      
2017 04  23.26183  09 58 46.15   +01 36 00.0   26.2r 17DV159   T09  C~7ujJ      
2018 01  17.46122  10 05 16.12   +01 11 04.0   24.6i 17DV159   T09  C~81Bu      
2018 01  17.51830  10 05 15.95   +01 11 04.5   26.0i 17DV159   T09  C~81Bu      
2018 01  17.54536  10 05 15.87   +01 11 05.0   25.3i 17DV159   T09  C~81Bu      

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    -0.08       0.00    -0.10
     2   0.0002     -3.30     0.08      -0.16    -0.07
     3   1.1166   -290.83     0.17    1201.79     0.00
     4   1.1167   -292.47     0.02    1201.93    -0.01
     5   1.9273   4563.40    -0.04    2375.79     0.13
     6   1.9275   4562.32     0.09    2375.70     0.31
     7   1.9275   4562.98 (   1.32)   2376.48 (   1.22)
     8   2.0010   3626.30    -0.18    2273.85     0.04
     9   2.0010   3625.52    -0.19    2273.77    -0.00
    10   2.0011   3624.37    -0.13    2273.87     0.16
    11   2.0012   3622.08    -0.10    2273.56    -0.04
    12   2.0013   3620.99    -0.21    2273.47    -0.07
    13   2.0013   3620.43    -0.06    2273.69     0.18
    14   2.0014   3619.55    -0.11    2273.47     0.00
    15   2.0062   3542.21     0.35    2270.46     0.16
    16   2.0063   3540.88 (   0.54)   2270.18 (  -0.06)
    17   2.0064   3539.86     0.14    2270.33     0.12
    18   2.0067   3534.70    -0.02    2270.01     0.01
    19   2.0068   3532.91     0.05    2270.08     0.17
    20   2.0069   3531.78     0.30    2269.67    -0.19
    21   2.0256   3216.13    -0.09    2262.54     0.22
    22   2.0256   3215.11    -0.04    2262.27    -0.03
    23   2.0257   3213.77    -0.31    2261.99    -0.30
    24   2.0258   3211.95     0.01    2262.16    -0.09
    25   2.0856   2112.06    -0.19    2291.08     0.00
    26   2.0858   2109.46    -0.10    2291.18    -0.05
    27   2.0858   2108.62     0.21    2291.29    -0.00
    28   2.0910   2010.42    -0.19    2297.49    -0.26
    29   2.0910   2009.72    -0.18    2297.65    -0.14
    30   2.0914   2003.05     0.14    2298.37     0.14
    31   2.0914   2002.35     0.16    2298.10    -0.17
    32   2.0915   2002.21 (   0.73)   2298.05 (  -0.27)
    33   2.0915   2000.84     0.27    2298.29    -0.09
    34   2.1156   1550.74     0.02    2336.92     0.21
    35   2.1157   1549.51     0.10    2336.78    -0.06
    36   2.1160   1543.51     0.03    2337.43     0.03
    37   2.1161   1542.52    -0.02    2337.49    -0.00
    38   2.1649    694.35    -0.11    2454.47    -0.22
    39   2.1651    690.32     0.04    2455.42     0.02
    40   2.1652    688.95    -0.18    2455.65     0.06
    41   2.1653    688.35     0.36    2455.97     0.17
    42   2.1730    566.30    -0.04    2478.57    -0.29
    43   2.1730    565.91     0.17    2479.18     0.20
    44   2.1730    565.11    -0.05    2479.20     0.11
    45   2.1868    358.64 (   0.07)   2523.92 (   0.95)
    46   2.1868    358.71 (   0.29)   2523.74 (   0.73)
    47   2.1868    358.71 (   0.45)   2523.74 (   0.69)
    48   2.1869    358.71 (   0.60)   2523.74 (   0.66)
    49   2.1869    358.74 (   0.79)   2524.07 (   0.96)
    50   2.2523   -387.72     0.11    2771.69    -0.17
    51   2.2523   -388.00     0.09    2772.01     0.02
    52   2.2524   -388.73    -0.47    2772.27     0.20
    53   2.9894   5615.36     0.24    3414.39     0.04
    54   2.9896   5612.80     0.06    3413.97    -0.23
    55   2.9896   5611.50    -0.11    3414.02    -0.11

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.

17DV159    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        50.257    50.317    50.201
ecceobj         0.314     0.316     0.312
incobj         33.625    33.622    33.627
qmin           32.353    32.821    32.733
qmax           69.328    68.779    68.431
amean          50.419    50.413    50.167
amin           49.792    49.861    49.674
amax           51.151    51.095    50.814
emean           0.331     0.322     0.322
emin            0.302     0.306     0.299
emax            0.357     0.347     0.347
imean          32.337    32.607    32.480
imin           31.649    31.960    31.884
imax           33.308    33.128    33.215
excite_mean     0.629     0.628     0.626
fracstop        1.000     1.000     1.000
cjmean          2.661     2.661     2.662

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       186.1     201.5     195.6
kozaiamp        180.0     180.0     179.9