Orbit Fit and Astrometric record for 15VK164

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: 15VK164   
# Created Fri Dec  3 02:13:35 2021
# Orbit generated from Bernstein formalism
# Fitting     40 observations of     40
# Arc:   2.85y
# First observation: 2014/11/17
#  Last observation: 2017/09/22
Preliminary a, adot, b, bdot, g, gdot:
  -0.000384   0.042195   0.000004  -0.001114   0.033946   0.000000
# Chi-squared of fit:     3.80 DOF:     74 RMS:  0.05
# Min/Max residuals:    -0.17    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.978415E-05  4.188486E-02 -5.831052E-07 -1.107289E-03  3.368998E-02 -5.196100E-03
# Covariance matrix:
  2.4813E-13 -2.7427E-13 -1.8396E-15  4.6928E-15 -1.1173E-13 -1.5752E-12
 -2.7427E-13  4.3176E-13  3.5737E-15 -8.9809E-15  2.0035E-13  3.0295E-12
 -1.8396E-15  3.5737E-15  1.4628E-13 -7.9822E-14  1.6659E-15  2.9034E-14
  4.6928E-15 -8.9809E-15 -7.9822E-14  5.8283E-14 -5.0270E-15 -7.2754E-14
 -1.1173E-13  2.0035E-13  1.6659E-15 -5.0270E-15  1.9687E-13  1.6018E-12
 -1.5752E-12  3.0295E-12  2.9034E-14 -7.2754E-14  1.6018E-12  2.4565E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.311185   45.936382   -0.147191   -0.022240   -0.978211  2456978.807838
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          338.64783 +/-     0.015
Argument of Peri:      255.89407 +/-     0.028
Long of Asc Node:      186.04034 +/-     0.007
Inclination:             1.96720 +/-     0.000
Eccentricity:         0.24931091 +/-    0.0001
Semi-Major Axis:     39.31077019 +/-    0.0030
Time of Perihelion: 2462310.0578 +/-       3.6
Perihelion:          29.51016633 +/-    0.0042
Aphelion:            49.11137405 +/-    0.0051
Period (y)              246.4765 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           21.20906495 +/-    0.0003
Ecliptic Y           22.13020300 +/-    0.0003
Ecliptic Z           -0.67924194 +/-    0.0000
Ecliptic XDOT        -0.00274517 +/-    0.0000
Ecliptic YDOT         0.00205741 +/-    0.0000
Ecliptic ZDOT        -0.00008020 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.65993624 +/-    0.0003
Geocenter to KBO     29.68241957 +/-    0.0004
# Hcoef:  9.30

The following table shows the complete astrometric record for 15VK164. 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 (15VK164) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.30706  02 55 27.011  +15 21 09.87  24.3r 15VK164   568  C~2lVW      
2014 11  17.41581  02 55 26.313  +15 21 06.84  23.9r 15VK164   568  C~2lVW      
2014 11  17.53006  02 55 25.569  +15 21 03.79  23.8r 15VK164   568  C~2lVW      
2014 11  19.32624  02 55 14.276  +15 20 14.38  24.2r 15VK164   568  C~2lVW      
2014 11  23.42912  02 54 48.744  +15 18 23.71  24.4r 15VK164   568  C~2lVW      
2015 08  11.62323  03 10 59.119  +16 25 43.33  24.4w 15VK164   568  C~2lVW      
2015 09  07.53281  03 10 58.723  +16 24 13.23  24.2w 15VK164   568  C~2lVW      
2015 09  12.52956  03 10 48.534  +16 23 17.06  24.4w 15VK164   568  C~2lVW      
2015 10  07.47166  03 09 16.018  +16 15 57.54  23.7w 15VK164   568  C~2lVW      
2015 10  08.47583  03 09 11.018  +16 15 35.19  24.4w 15VK164   568  C~2lVW      
2015 10  08.53403  03 09 10.721  +16 15 33.91  24.5w 15VK164   568  C~2lVW      
2015 11  06.29151  03 06 21.080  +16 03 18.19  24.6r 15VK164   568  C~2lVW      
2015 11  06.35485  03 06 20.654  +16 03 16.54  24.0r 15VK164   568  C~2lVW      
2015 11  06.49480  03 06 19.739  +16 03 12.75  23.8r 15VK164   568  C~2lVW      
2015 11  07.51356  03 06 13.145  +16 02 44.87  24.2w 15VK164   568  C~2lVW      
2015 11  17.27960  03 05 09.867  +15 58 19.20  24.4w 15VK164   568  C~2lVW      
2015 11  17.32888  03 05 09.545  +15 58 17.92  24.3w 15VK164   568  C~2lVW      
2015 12  13.34220  03 02 34.551  +15 47 44.78  24.4w 15VK164   568  C~2lVW      
2015 12  13.40075  03 02 34.235  +15 47 43.55  24.4w 15VK164   568  C~2lVW      
2016 01  01.39556  03 01 12.517  +15 42 27.69  24.6w 15VK164   568  C~2lVW      
2016 01  07.34177  03 00 54.857  +15 41 24.08  24.3w 15VK164   568  C~2lVW      
2016 02  04.27190  03 00 32.482  +15 40 49.63  24.6w 15VK164   568  C~2lVX      
2016 02  10.26162  03 00 41.339  +15 41 40.42  24.5w 15VK164   568  C~2lVX      
2016 09  06.60560  03 20 40.749  +16 58 20.71        15VK164   568  C~2lVX      
2016 09  26.59656  03 19 48.121  +16 53 59.40  24.6w 15VK164   568  C~2lVX      
2016 10  10.40230  03 18 46.465  +16 49 28.84  24.4w 15VK164   568  C~2lVX      
2016 10  10.46065  03 18 46.176  +16 49 27.57  24.4w 15VK164   568  C~2lVX      
2016 11  02.60285  03 16 30.556  +16 40 05.16  24.4w 15VK164   568  C~2lVX      
2016 11  03.52184  03 16 24.657  +16 39 41.26  24.4w 15VK164   568  C~2lVX      
2016 12  24.29598  03 11 22.135  +16 20 05.47  24.4w 15VK164   568  C~2lVX      
2016 12  24.30148  03 11 22.115  +16 20 05.38  24.5w 15VK164   568  C~2lVX      
2017 01  01.26608  03 10 50.398  +16 18 11.93  24.6w 15VK164   568  C~2lVX      
2017 01  02.37586  03 10 46.526  +16 17 58.60  24.3w 15VK164   568  C~2lVX      
2017 01  02.39822  03 10 46.447  +16 17 58.35  24.5w 15VK164   568  C~2lVX      
2017 01  02.40371  03 10 46.422  +16 17 58.29  24.2w 15VK164   568  C~2lVX      
2017 01  26.27054  03 10 00.266  +16 15 44.52  24.4w 15VK164   568  C~2lVX      
2017 01  26.28489  03 10 00.257  +16 15 44.51  24.3w 15VK164   568  C~2lVX      
2017 09  15.58250  03 30 15.244  +17 29 33.77  24.2w 15VK164   568  C~2lVX      
2017 09  21.62755  03 29 59.562  +17 28 18.39  23.9w 15VK164   568  C~2lVX      
2017 09  22.56874  03 29 56.724  +17 28 05.35  24.4w 15VK164   568  C~2lVX      

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    -0.03       0.00     0.01
     2   0.0003    -10.54     0.00      -0.01    -0.04
     3   0.0006    -21.73    -0.09       0.16     0.12
     4   0.0055   -192.39     0.00      -0.29    -0.05
     5   0.0168   -577.98     0.01      -0.15    -0.08
     6   0.7319  14015.15    -0.04     -18.63     0.06
     7   0.8055  13985.29     0.00    -104.07    -0.04
     8   0.8192  13828.25    -0.17    -118.74     0.05
     9   0.8875  12421.57     0.03    -182.18    -0.08
    10   0.8903  12345.94    -0.01    -184.18     0.01
    11   0.8904  12341.46     0.03    -184.25     0.03
    12   0.9692   9781.98     0.14    -225.14    -0.06
    13   0.9693   9775.61    -0.00    -225.04     0.04
    14   0.9697   9761.85     0.07    -225.06     0.05
    15   0.9725   9662.58    -0.03    -225.76     0.03
    16   0.9992   8710.45     0.03    -230.00    -0.06
    17   0.9994   8705.62     0.04    -229.94    -0.04
    18   1.0706   6378.47     0.09    -217.91    -0.02
    19   1.0708   6373.75     0.01    -217.82    -0.01
    20   1.1228   5151.79     0.06    -191.14     0.12
    21   1.1390   4889.01    -0.03    -180.63     0.00
    22   1.2155   4569.05     0.02    -122.89     0.04
    23   1.2319   4706.15     0.00    -110.10    -0.04
    24   1.8051  22661.07    -0.04    -331.60     0.05
    25   1.8598  21854.77     0.07    -389.57    -0.01
    26   1.8976  20919.87    -0.09    -421.65     0.05
    27   1.8978  20915.49     0.11    -421.80    -0.02
    28   1.9611  18869.32     0.01    -456.00    -0.03
    29   1.9636  18780.51    -0.00    -456.80    -0.03
    30   2.1026  14244.44    -0.08    -434.08    -0.00
    31   2.1027  14244.13    -0.01    -434.09    -0.02
    32   2.1245  13771.69    -0.07    -420.49    -0.11
    33   2.1275  13714.16     0.05    -418.31    -0.02
    34   2.1276  13712.99     0.04    -418.24     0.00
    35   2.1276  13712.62    -0.03    -418.20     0.03
    36   2.1929  13033.75    -0.04    -367.56     0.03
    37   2.1930  13033.63    -0.07    -367.53     0.02
    38   2.8290  31243.37     0.02    -591.50     0.05
    39   2.8455  31001.99     0.06    -609.63    -0.03
    40   2.8481  30958.47    -0.05    -612.31     0.01

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.

15VK164    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.608    39.614    39.602
ecceobj         0.252     0.252     0.252
incobj          1.960     1.960     1.960
qmin           29.165    29.128    29.151
qmax           50.487    50.523    50.493
amean          39.456    39.456    39.456
amin           38.905    38.940    38.910
amax           40.068    40.087    40.081
emean           0.246     0.246     0.246
emin            0.232     0.231     0.230
emax            0.261     0.261     0.261
imean           2.474     2.471     2.593
imin            1.894     1.875     2.221
imax            2.901     3.218     2.987
excite_mean     0.250     0.250     0.250
fracstop        1.000     1.000     1.000
cjmean          2.980     2.980     2.980

libcent 0       179.8     180.1     180.7
libamp  0       120.9     106.4     120.9
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       176.5     197.6     176.8
kozaiamp        180.0     179.8     180.0