Orbit Fit and Astrometric record for 15VJ181

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: 15VJ181   
# Created Mon Dec  6 02:13:43 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     46 observations of     46
# Arc:   6.79y
# First observation: 2014/12/31
#  Last observation: 2021/10/14
# Chi-squared of fit:    12.11 DOF:     86 RMS:  0.09
# Min/Max residuals:    -0.27    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.738590E-05  3.141187E-02  3.813408E-06  8.116400E-03  2.842527E-02 -2.733174E-03
# Covariance matrix:
  2.7990E-13 -1.5879E-13 -5.3785E-16 -2.7549E-14 -1.0762E-13 -5.8114E-13
 -1.5879E-13  1.2588E-13 -1.8784E-14  2.1284E-14  2.5216E-14  4.7013E-13
 -5.3785E-16 -1.8784E-14  1.0638E-13 -2.2338E-14  5.1494E-14 -5.1299E-14
 -2.7549E-14  2.1284E-14 -2.2338E-14  1.1690E-14  1.1292E-14  8.7457E-14
 -1.0762E-13  2.5216E-14  5.1494E-14  1.1292E-14  1.9881E-13  1.8171E-13
 -5.8114E-13  4.7013E-13 -5.1299E-14  8.7457E-14  1.8171E-13  1.9033E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
  -34.541046   14.501941   -0.977517   -0.053320   -0.077817  2457022.637748
# Heliocentric elements and errors
Epoch:              2457022.5000  =  2014/12/31
Mean Anomaly:          344.52096 +/-     0.011
Argument of Peri:      313.71223 +/-     0.017
Long of Asc Node:       80.27092 +/-     0.000
Inclination:            37.38128 +/-     0.000
Eccentricity:         0.17841308 +/-    0.0001
Semi-Major Axis:     42.43824418 +/-    0.0035
Time of Perihelion: 2461364.3614 +/-      12.4
Perihelion:          34.86670647 +/-    0.0037
Aphelion:            50.00978189 +/-    0.0047
Period (y)              276.4676 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.89879498 +/-    0.0004
Ecliptic Y            8.22803904 +/-    0.0001
Ecliptic Z          -19.94686825 +/-    0.0003
Ecliptic XDOT        -0.00054242 +/-    0.0000
Ecliptic YDOT         0.00298058 +/-    0.0000
Ecliptic ZDOT         0.00079330 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.26930031 +/-    0.0004
Geocenter to KBO     35.18005712 +/-    0.0006
# Hcoef:  6.97

The following table shows the complete astrometric record for 15VJ181. 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 (15VJ181) followed by the observatory code and reference code for the source of the astrometry.

2014 12  31.13697  01 49 55.220  -25 59 11.45  22.3z 15VJ181   W84  C~4yYf      
2015 11  06.14817  02 00 06.569  -25 14 20.41  22.2i 15VJ181   W84  C~4yYf      
2015 11  06.14817  02 00 06.57   -25 14 20.4   22.3i 15VJ181   W84  C~3cuO      
2015 11  06.14954  02 00 06.571  -25 14 20.38  22.2r 15VJ181   W84  C~4yYf      
2015 11  06.14954  02 00 06.57   -25 14 20.4   22.3r 15VJ181   W84  C~3cuO      
2015 11  08.14224  01 59 54.675  -25 14 23.21  23.2g 15VJ181   W84  C~4yYf      
2015 11  08.15591  01 59 54.598  -25 14 23.44  22.2i 15VJ181   W84  C~4yYf      
2015 11  08.15591  01 59 54.60   -25 14 23.4   22.3i 15VJ181   W84  C~3cuO      
2015 11  08.15729  01 59 54.588  -25 14 23.39  22.7r 15VJ181   W84  C~4yYf      
2015 11  08.15729  01 59 54.59   -25 14 23.4   22.7r 15VJ181   W84  C~3cuO      
2015 11  16.21496  01 59 07.931  -25 13 46.13  23.3g 15VJ181   W84  C~4yYf      
2015 11  16.21496  01 59 07.93   -25 13 46.1   23.1g 15VJ181   W84  C~3cuO      
2015 11  21.09974  01 58 41.147  -25 12 45.38  22.1z 15VJ181   W84  C~4yYf      
2015 11  21.09974  01 58 41.15   -25 12 45.4   22.1z 15VJ181   W84  C~3cuO      
2015 11  21.10387  01 58 41.133  -25 12 45.22  22.2i 15VJ181   W84  C~4yYf      
2015 11  21.10387  01 58 41.13   -25 12 45.2   22.3i 15VJ181   W84  C~3cuO      
2016 09  24.21719  02 10 28.433  -23 40 49.93  23.0g 15VJ181   W84  C~4yYf      
2016 09  24.21719  02 10 28.43   -23 40 49.9   23.1g 15VJ181   W84  C~3cuO      
2016 11  16.26238  02 05 20.678  -23 58 47.45  22.3z 15VJ181   W84  C~4yYf      
2016 12  03.09245  02 03 54.100  -23 53 36.39  22.4i 15VJ181   W84  C~4yYf      
2016 12  03.09245  02 03 54.10   -23 53 36.4   22.5i 15VJ181   W84  C~3cuO      
2016 12  03.09381  02 03 54.097  -23 53 36.27  22.5r 15VJ181   W84  C~4yYf      
2016 12  03.09381  02 03 54.10   -23 53 36.3   22.5r 15VJ181   W84  C~3cuO      
2016 12  03.09518  02 03 54.093  -23 53 36.19  23.1g 15VJ181   W84  C~4yYf      
2016 12  03.09518  02 03 54.09   -23 53 36.2   23.2g 15VJ181   W84  C~3cuO      
2017 09  14.39921  02 17 21.746  -22 15 55.52  21.9z 15VJ181   W84  C~4yYf      
2017 10  13.29186  02 14 56.259  -22 35 31.13  21.8z 15VJ181   W84  C~4yYf      
2017 10  13.29324  02 14 56.263  -22 35 31.10  22.2i 15VJ181   W84  C~4yYf      
2017 12  09.08784  02 09 38.470  -22 35 12.81  22.7r 15VJ181   W84  C~4yYf      
2017 12  12.12278  02 09 26.143  -22 33 28.44  23.2g 15VJ181   W84  C~4yYf      
2018 01  18.09021  02 08 13.017  -22 00 40.20  22.6i 15VJ181   W84  C~4yYf      
2018 01  18.09159  02 08 13.016  -22 00 40.07  22.6r 15VJ181   W84  C~4yYf      
2018 01  18.09296  02 08 13.019  -22 00 39.94  23.2g 15VJ181   W84  C~4yYf      
2018 09  19.36104  02 23 04.447  -21 01 30.42  22.3r 15VJ181   W84  C~4yYf      
2018 09  19.36243  02 23 04.443  -21 01 30.55  22.3i 15VJ181   W84  C~4yYf      
2018 11  29.22779  02 16 29.999  -21 22 50.07  22.5r 15VJ181   W84  C~4yYf      
2018 12  02.12850  02 16 15.580  -21 21 49.50  23.0g 15VJ181   W84  C~4yYf      
2020 10  14.46854  02 32 48.886  -18 38 54.65  22.5w 15VJ181   F51  C~4AGp      
2020 10  14.47885  02 32 48.845  -18 38 55.02  22.2w 15VJ181   F51  C~4AGp      
2020 10  14.48918  02 32 48.790  -18 38 55.27  22.2w 15VJ181   F51  C~4AGp      
2020 10  14.49954  02 32 48.714  -18 38 55.67  22.7w 15VJ181   F51  C~4AGp      
2020 10  20.305960 02 32 15.320  -18 41 40.12  22.2G 15VJ181   G37  C~4Kzj      
2020 10  20.358400 02 32 15.021  -18 41 41.35        15VJ181   G37  C~4Kzj      
2021 10  14.486406 02 38 41.524  -17 17 49.79  22.3w 15VJ181   F51  C~59oC      
2021 10  14.498061 02 38 41.443  -17 17 49.87  22.3w 15VJ181   F51  C~59oC      
2021 10  14.509698 02 38 41.358  -17 17 50.60  22.1w 15VJ181   F51  C~59oC      

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    -0.05       0.00     0.14
     2   0.8488      0.00    -0.02       0.00     0.04
     3   0.8488      0.00    -0.04       0.00     0.03
     4   0.8488      0.00     0.10       0.00     0.04
     5   0.8488      0.00     0.12       0.00     0.06
     6   0.8542      0.00    -0.05       0.00     0.14
     7   0.8543      0.00     0.03       0.00    -0.09
     8   0.8543      0.00     0.06       0.00    -0.05
     9   0.8543      0.00     0.04       0.00    -0.05
    10   0.8543      0.00     0.01       0.00    -0.04
    11   0.8763      0.00    -0.17       0.00     0.07
    12   0.8763      0.00    -0.16       0.00     0.04
    13   0.8897      0.00     0.01       0.00    -0.05
    14   0.8897      0.00    -0.04       0.00    -0.03
    15   0.8897      0.00     0.09       0.00     0.06
    16   0.8897      0.00     0.05       0.00     0.08
    17   1.7333      0.00    -0.03       0.00     0.01
    18   1.7333      0.00     0.02       0.00    -0.02
    19   1.8785      0.00    -0.02       0.00    -0.08
    20   1.9246      0.00    -0.02       0.00    -0.11
    21   1.9246      0.00    -0.02       0.00    -0.10
    22   1.9246      0.00     0.08       0.00    -0.05
    23   1.9246      0.00     0.03       0.00    -0.02
    24   1.9246      0.00     0.02       0.00     0.01
    25   1.9246      0.00     0.07       0.00     0.02
    26   2.7057      0.00     0.16       0.00    -0.09
    27   2.7848      0.00    -0.18       0.00    -0.08
    28   2.7848      0.00     0.00       0.00    -0.00
    29   2.9403      0.00    -0.09       0.00     0.00
    30   2.9486      0.00     0.21       0.00     0.07
    31   3.0498      0.00     0.00       0.00     0.04
    32   3.0498      0.00    -0.02       0.00     0.08
    33   3.0498      0.00     0.03       0.00     0.11
    34   3.7186      0.00     0.04       0.00    -0.05
    35   3.7186      0.00     0.07       0.00    -0.11
    36   3.9126      0.00    -0.04       0.00    -0.02
    37   3.9206      0.00     0.11       0.00    -0.01
    38   5.7887      0.00    -0.20       0.00     0.05
    39   5.7888      0.00     0.08       0.00    -0.00
    40   5.7888      0.00     0.14       0.00     0.07
    41   5.7888      0.00    -0.10       0.00    -0.02
    42   5.8047      0.00    -0.12       0.00     0.01
    43   5.8048      0.00     0.07       0.00     0.13
    44   6.7881      0.00     0.24       0.00    -0.11
    45   6.7881      0.00     0.02       0.00     0.18
    46   6.7882      0.00    -0.27       0.00    -0.19

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.

15VJ181    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        42.860    42.860    42.861
ecceobj         0.186     0.186     0.186
incobj         37.391    37.391    37.391
qmin           33.912    33.890    33.925
qmax           51.590    51.631    51.629
amean          42.567    42.567    42.568
amin           42.194    42.206    42.211
amax           42.972    42.978    42.979
emean           0.177     0.177     0.177
emin            0.151     0.151     0.152
emax            0.201     0.202     0.202
imean          35.921    35.919    35.918
imin           35.432    35.407    35.435
imax           36.331    36.339    36.340
excite_mean     0.613     0.613     0.613
fracstop        1.000     1.000     1.000
cjmean          2.604     2.604     2.604

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       175.2     175.0     175.2
kozaiamp        180.0     180.0     180.0