Orbit Fit and Astrometric record for 15VK168

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: 15VK168   
# Created Sun Nov 24 02:10:31 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     36 observations of     36
# Arc:   9.14y
# First observation: 2014/11/17
#  Last observation: 2024/01/09
# Chi-squared of fit:     5.13 DOF:     66 RMS:  0.07
# Min/Max residuals:    -0.17    0.16
# Exact a, adot, b, bdot, g, gdot:
  1.785437E-05  3.034543E-02 -3.627955E-06 -7.659674E-03  2.664345E-02  7.343196E-04
# Covariance matrix:
  2.1520E-13 -1.5913E-13 -3.7673E-14  3.8017E-14 -4.1409E-14 -5.1332E-13
 -1.5913E-13  1.5290E-13  3.8506E-14 -3.8710E-14  2.5688E-14  5.2383E-13
 -3.7673E-14  3.8506E-14  8.0506E-14 -2.5341E-14  1.9911E-15  1.4104E-13
  3.8017E-14 -3.8710E-14 -2.5341E-14  1.8138E-14 -3.2197E-15 -1.4125E-13
 -4.1409E-14  2.5688E-14  1.9911E-15 -3.2197E-15  1.3896E-13  3.4056E-14
 -5.1332E-13  5.2383E-13  1.4104E-13 -1.4125E-13  3.4056E-14  1.9156E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.052668   49.354731   -0.088765   -0.035148   -0.984855  2456978.818008
# Heliocentric elements and errors
Epoch:              2456978.5000  =  2014/11/17
Mean Anomaly:            2.37319 +/-     0.004
Argument of Peri:      182.89620 +/-     0.009
Long of Asc Node:      221.61791 +/-     0.000
Inclination:            14.30344 +/-     0.000
Eccentricity:         0.34763710 +/-    0.0001
Semi-Major Axis:     58.97858545 +/-    0.0063
Time of Perihelion: 2455887.8908 +/-       1.9
Perihelion:          38.47544114 +/-    0.0055
Aphelion:            79.48172975 +/-    0.0092
Period (y)              452.9494 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.00351896 +/-    0.0003
Ecliptic Y           29.26698234 +/-    0.0004
Ecliptic Z           -1.34450492 +/-    0.0000
Ecliptic XDOT        -0.00233952 +/-    0.0000
Ecliptic YDOT         0.00206202 +/-    0.0000
Ecliptic ZDOT        -0.00078920 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.51673209 +/-    0.0004
Geocenter to KBO     37.53270223 +/-    0.0005
# Hcoef:  7.61

The following table shows the complete astrometric record for 15VK168. 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 (15VK168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.31723  03 09 55.689  +15 35 25.77  23.1r 15VK168   568  C~2lVm      
2014 11  17.42609  03 09 55.114  +15 35 23.19  23.3r 15VK168   568  C~2lVm      
2014 11  17.54029  03 09 54.525  +15 35 20.33  23.3r 15VK168   568  C~2lVm      
2014 11  19.33914  03 09 45.345  +15 34 35.95  23.4r 15VK168   568  C~2lVm      
2015 09  07.62490  03 21 51.358  +16 02 25.29  23.8w 15VK168   568  C~2lVm      
2015 09  12.48855  03 21 44.566  +16 01 20.95  23.8w 15VK168   568  C~2lVm      
2015 10  07.53269  03 20 35.581  +15 53 52.74  23.6w 15VK168   568  C~2lVm      
2015 10  07.59208  03 20 35.355  +15 53 51.54  23.6w 15VK168   568  C~2lVm      
2015 10  09.57195  03 20 27.765  +15 53 09.10  23.6w 15VK168   568  C~2lVm      
2015 11  06.34408  03 18 19.646  +15 42 13.14  23.4r 15VK168   568  C~2lVm      
2015 11  06.41470  03 18 19.281  +15 42 11.46  23.3r 15VK168   568  C~2lVm      
2015 11  06.48426  03 18 18.920  +15 42 09.65  23.3r 15VK168   568  C~2lVm      
2015 11  07.50182  03 18 13.725  +15 41 44.59  23.6w 15VK168   568  C~2lVm      
2015 11  17.48361  03 17 22.283  +15 37 40.52  23.5w 15VK168   568  C~2lVm      
2015 11  17.57138  03 17 21.817  +15 37 38.26  23.6w 15VK168   568  C~2lVm      
2015 12  06.34926  03 15 48.457  +15 30 30.20  23.7w 15VK168   568  C~2lVm      
2015 12  06.48675  03 15 47.803  +15 30 27.38  23.6w 15VK168   568  C~2lVm      
2015 12  31.37031  03 14 10.024  +15 23 15.46  23.6w 15VK168   568  C~2lVm      
2016 01  07.39971  03 13 50.933  +15 21 52.96  23.8w 15VK168   568  C~2lVm      
2016 02  05.29926  03 13 23.639  +15 19 53.93  23.8w 15VK168   568  C~2lVm      
2016 02  11.25262  03 13 29.012  +15 20 14.56  23.7w 15VK168   568  C~2lVm      
2016 09  07.58521  03 29 09.249  +16 02 54.35  23.7w 15VK168   568  C~2lVm      
2016 09  29.49637  03 28 23.195  +15 57 06.14  23.7w 15VK168   568  C~2lVm      
2016 10  07.50403  03 27 55.980  +15 54 26.09  23.7w 15VK168   568  C~2lVm      
2016 10  07.59973  03 27 55.611  +15 54 24.17  23.7w 15VK168   568  C~2lVm      
2016 10  09.50422  03 27 48.428  +15 53 44.01  23.8w 15VK168   568  C~2lVm      
2016 10  09.57681  03 27 48.157  +15 53 42.57  23.7w 15VK168   568  C~2lVm      
2016 11  02.49102  03 26 00.369  +15 44 34.23  23.6w 15VK168   568  C~2lVm      
2016 11  04.46713  03 25 50.431  +15 43 46.83  23.6w 15VK168   568  C~2lVm      
2016 12  28.44224  03 21 37.913  +15 25 22.12  23.8w 15VK168   568  C~2lVm      
2016 12  28.45409  03 21 37.871  +15 25 22.01  23.8w 15VK168   568  C~2lVm      
2017 01  27.30860  03 20 38.258  +15 21 33.55  23.9w 15VK168   568  C~2lVm      
2017 12  13.35764  03 29 59.997  +15 30 03.59  23.6w 15VK168   568  C~2lVm      
2024 01  09.131070 04 11 48.543  +15 10 08.75  23.8G 15VK168   G37  C~7gt1      
2024 01  09.243760 04 11 48.135  +15 10 07.99        15VK168   G37  C~7gt1      
2024 01  09.359130 04 11 47.723  +15 10 07.25        15VK168   G37  C~7gt1      

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    -0.17
     2   0.0003      0.00    -0.03       0.00    -0.06
     3   0.0006      0.00     0.06       0.00    -0.08
     4   0.0055      0.00     0.01       0.00    -0.08
     5   0.8058      0.00    -0.08       0.00    -0.03
     6   0.8191      0.00     0.04       0.00    -0.03
     7   0.8877      0.00     0.02       0.00    -0.04
     8   0.8878      0.00     0.06       0.00     0.03
     9   0.8932      0.00    -0.00       0.00     0.04
    10   0.9693      0.00    -0.07       0.00     0.01
    11   0.9695      0.00    -0.06       0.00     0.05
    12   0.9697      0.00    -0.05       0.00    -0.04
    13   0.9724      0.00    -0.00       0.00    -0.03
    14   0.9998      0.00    -0.02       0.00     0.03
    15   1.0000      0.00    -0.13       0.00    -0.09
    16   1.0514      0.00    -0.04       0.00     0.06
    17   1.0518      0.00    -0.03       0.00     0.14
    18   1.1199      0.00    -0.01       0.00     0.04
    19   1.1392      0.00     0.16       0.00     0.04
    20   1.2183      0.00    -0.09       0.00     0.08
    21   1.2346      0.00     0.02       0.00     0.03
    22   1.8077      0.00     0.03       0.00     0.03
    23   1.8677      0.00     0.15       0.00     0.06
    24   1.8896      0.00     0.08       0.00    -0.08
    25   1.8899      0.00    -0.01       0.00    -0.00
    26   1.8951      0.00    -0.12       0.00    -0.05
    27   1.8953      0.00     0.10       0.00     0.06
    28   1.9608      0.00    -0.03       0.00     0.07
    29   1.9662      0.00     0.03       0.00    -0.00
    30   2.1140      0.00     0.08       0.00    -0.01
    31   2.1140      0.00     0.05       0.00     0.05
    32   2.1957      0.00     0.02       0.00    -0.01
    33   3.0720      0.00    -0.07       0.00     0.13
    34   9.1439      0.00     0.08       0.00    -0.03
    35   9.1442      0.00    -0.02       0.00    -0.05
    36   9.1445      0.00    -0.09       0.00    -0.03

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.

15VK168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        59.689    59.688    59.689
ecceobj         0.355     0.355     0.355
incobj         14.261    14.261    14.261
qmin           37.287    37.297    37.280
qmax           81.563    81.547    81.550
amean          58.877    58.877    58.877
amin           58.251    58.247    58.238
amax           59.721    59.722    59.715
emean           0.351     0.351     0.351
emin            0.338     0.338     0.338
emax            0.366     0.366     0.366
imean          14.781    14.781    14.781
imin           14.366    14.364    14.367
imax           15.181    15.185    15.182
excite_mean     0.434     0.434     0.434
fracstop        1.000     1.000     1.000
cjmean          3.044     3.044     3.044

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       181.1     181.1     181.1
kozaiamp        180.0     180.0     180.0