Orbit Fit and Astrometric record for 17BV236

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: 17BV236   
# Created Tue Apr  1 01:11:02 2025
# Orbit generated from Bernstein formalism
# Fitting     26 observations of     26
# Arc:   3.00y
# First observation: 2016/04/02
#  Last observation: 2019/04/03
Preliminary a, adot, b, bdot, g, gdot:
  -0.000065   0.022555  -0.000023   0.002456   0.022865   0.000000
# Chi-squared of fit:    15.68 DOF:     46 RMS:  0.14
# Min/Max residuals:    -0.35    0.36
# Exact a, adot, b, bdot, g, gdot:
  1.415172E-05  2.222993E-02  1.556731E-06  2.419195E-03  2.329639E-02 -4.063071E-03
# Covariance matrix:
  1.9907E-13 -5.5462E-13  1.9866E-14 -5.4788E-14  5.7104E-14 -7.2023E-12
 -5.5462E-13  3.5052E-12 -1.4067E-13  3.7675E-13 -8.4031E-13  4.9413E-11
  1.9866E-14 -1.4067E-13  1.1183E-13 -6.9474E-14  3.6111E-14 -2.0164E-12
 -5.4788E-14  3.7675E-13 -6.9474E-14  1.0031E-13 -9.1656E-14  5.4023E-12
  5.7104E-14 -8.4031E-13  3.6111E-14 -9.1656E-14  4.1268E-13 -1.1969E-11
 -7.2023E-12  4.9413E-11 -2.0164E-12  5.4023E-12 -1.1969E-11  7.0857E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    2.190646 -174.394857   -0.124366    0.037898   -0.987090  2457480.894196
# Heliocentric elements and errors
Epoch:              2457480.5000  =  2016/04/02
Mean Anomaly:          300.13858 +/-     0.027
Argument of Peri:       99.47898 +/-     0.132
Long of Asc Node:      166.72099 +/-     0.002
Inclination:             6.53521 +/-     0.001
Eccentricity:         0.18638678 +/-    0.0011
Semi-Major Axis:     46.92366275 +/-    0.0105
Time of Perihelion: 2477002.7909 +/-       5.7
Perihelion:          38.17771213 +/-    0.0544
Aphelion:            55.66961337 +/-    0.0551
Period (y)              321.4371 +/-      0.11
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -43.66329122 +/-    0.0012
Ecliptic Y           -4.41242916 +/-    0.0001
Ecliptic Z            1.64088774 +/-    0.0000
Ecliptic XDOT         0.00074096 +/-    0.0000
Ecliptic YDOT        -0.00255934 +/-    0.0000
Ecliptic ZDOT         0.00026586 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   43.91634142 +/-    0.0012
Geocenter to KBO     42.92509701 +/-    0.0012
# Hcoef:  8.82

The following table shows the complete astrometric record for 17BV236. 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 (17BV236) followed by the observatory code and reference code for the source of the astrometry.

2016 04  02.393407 12 24 03.10   -00 12 54.1         17BV236   T09  C~86uj      
2016 04  02.515196 12 24 02.57   -00 12 50.7         17BV236   T09  C~86uj      
2016 04  04.34883  12 23 54.83   -00 11 58.3   25.9g 17BV236   T09  C~89UT      
2016 04  04.38940  12 23 54.65   -00 11 57.4   25.6g 17BV236   T09  C~89UT      
2016 04  04.40648  12 23 54.56   -00 11 57.1   26.1g 17BV236   T09  C~89UT      
2016 04  04.41508  12 23 54.55   -00 11 56.7   26.1g 17BV236   T09  C~89UT      
2016 04  04.41735  12 23 54.53   -00 11 56.6   25.9g 17BV236   T09  C~89UT      
2016 06  05.311488 12 20 52.21   +00 07 09.2         17BV236   T09  C~86uj      
2016 06  05.356114 12 20 52.17   +00 07 09.4         17BV236   T09  C~86uj      
2017 01  28.59808  12 32 39.98   -01 02 40.6   24.9z 17BV236   T09  C~81Bp      
2017 01  28.64259  12 32 39.92   -01 02 39.5   25.1z 17BV236   T09  C~81Bp      
2017 01  28.64528  12 32 39.90   -01 02 39.4   24.3z 17BV236   T09  C~81Bp      
2017 01  28.64799  12 32 39.91   -01 02 39.4   24.4z 17BV236   T09  C~81Bp      
2017 02  02.60942  12 32 30.52   -01 01 17.1   24.8i 17BV236   T09  C~81Bp      
2017 02  02.61925  12 32 30.50   -01 01 16.7   24.8i 17BV236   T09  C~81Bp      
2017 02  02.62764  12 32 30.48   -01 01 16.7   24.3i 17BV236   T09  C~81Bp      
2017 02  02.63614  12 32 30.45   -01 01 16.4   24.6i 17BV236   T09  C~81Bp      
2017 02  23.52446  12 31 32.29   -00 53 39.1   25.1r 17BV236   T09  C~81Bp      
2017 02  23.56346  12 31 32.17   -00 53 38.2   25.5r 17BV236   T09  C~81Bp      
2017 02  23.56555  12 31 32.16   -00 53 37.7   25.9r 17BV236   T09  C~81Bp      
2017 02  23.59748  12 31 32.06   -00 53 37.4   25.0r 17BV236   T09  C~81Bp      
2017 02  23.63774  12 31 31.93   -00 53 36.4   25.4r 17BV236   T09  C~81Bp      
2019 04  03.44005  12 38 56.36   -01 21 33.3   25.1i 17BV236   T09  C~86uj      
2019 04  03.44273  12 38 56.35   -01 21 33.1   25.0i 17BV236   T09  C~86uj      
2019 04  03.46423  12 38 56.26   -01 21 32.5   25.0i 17BV236   T09  C~86uj      
2019 04  03.47225  12 38 56.21   -01 21 32.3   25.2i 17BV236   T09  C~86uj      

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     0.19       0.00     0.02
     2   0.0003     -8.65     0.15      -0.02    -0.08
     3   0.0054   -136.00    -0.09       2.13     0.25
     4   0.0055   -138.84    -0.07       1.89    -0.01
     5   0.0055   -140.20    -0.23       1.63    -0.28
     6   0.0055   -140.50     0.08       1.94     0.03
     7   0.0055   -140.81    -0.08       1.91    -0.00
     8   0.1750  -3106.01    -0.03     -28.58    -0.01
     9   0.1751  -3106.64     0.08     -28.64     0.03
    10   0.8247   8306.13     0.02     325.43    -0.35
    11   0.8248   8304.87     0.12     326.09     0.15
    12   0.8248   8304.55    -0.11     326.06     0.11
    13   0.8248   8304.69     0.11     326.12     0.16
    14   0.8384   8142.54     0.09     346.02    -0.16
    15   0.8384   8142.10     0.01     346.27     0.05
    16   0.8384   8141.83     0.05     346.15    -0.09
    17   0.8384   8141.29    -0.17     346.25    -0.03
    18   0.8956   7157.92    -0.27     421.24    -0.05
    19   0.8957   7155.91    -0.02     421.36    -0.03
    20   0.8957   7155.57    -0.23     421.76     0.36
    21   0.8958   7154.07     0.13     421.44    -0.04
    22   0.8959   7151.88     0.28     421.59    -0.01
    23   3.0008  13955.59     0.03    1518.69    -0.07
    24   3.0008  13955.37     0.01    1518.82     0.05
    25   3.0009  13953.89     0.08    1518.83     0.06
    26   3.0009  13953.11    -0.12    1518.72    -0.06

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.

17BV236    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        46.368    46.389    46.349
ecceobj         0.183     0.185     0.181
incobj          6.569     6.569     6.569
qmin           37.550    37.425    37.603
qmax           56.186    56.307    56.088
amean          46.651    46.671    46.633
amin           46.236    46.275    46.216
amax           47.139    47.159    47.112
emean           0.179     0.182     0.177
emin            0.165     0.168     0.163
emax            0.193     0.195     0.191
imean           6.421     6.442     6.428
imin            5.840     5.831     5.866
imax            7.037     7.062     7.015
excite_mean     0.211     0.214     0.210
fracstop        1.000     1.000     1.000
cjmean          3.079     3.078     3.080

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       179.3     180.0     179.1
kozaiamp        180.0     180.0     179.9