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 Thu Feb 21 02:10:25 2019
# Orbit generated from Bernstein formalism
# Fitting   33 observations of   33
# Arc:   3.07y
# First observation: 2014/11/17
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000007   0.030154   0.000001  -0.007606   0.026523   0.000000
# Chi-squared of fit:     3.96 DOF:   60 RMS:  0.06
# Min/Max residuals:    -0.14    0.15
# Exact a, adot, b, bdot, g, gdot:
  1.782551E-05  3.034537E-02 -3.897553E-06 -7.659430E-03  2.664340E-02  7.330339E-04
# Covariance matrix:
  3.2783E-13 -4.1346E-13 -3.4487E-14  7.6221E-14 -1.5215E-13 -3.8403E-12
 -4.1346E-13  7.4428E-13  7.5536E-14 -1.6635E-13  2.8841E-13  8.3927E-12
 -3.4487E-14  7.5536E-14  1.9510E-13 -1.3138E-13  3.1618E-14  9.6909E-13
  7.6221E-14 -1.6635E-13 -1.3138E-13  1.3131E-13 -7.1431E-14 -2.1325E-12
 -1.5215E-13  2.8841E-13  3.1618E-14 -7.1431E-14  2.5722E-13  3.5692E-12
 -3.8403E-12  8.3927E-12  9.6909E-13 -2.1325E-12  3.5692E-12  1.0762E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.052668   49.354731   -0.088765   -0.035148   -0.984856  2456978.818008
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:            2.35172 +/-     0.033
Argument of Peri:      182.90551 +/-     0.073
Long of Asc Node:      221.61762 +/-     0.000
Inclination:            14.30304 +/-     0.001
Eccentricity:         0.34762932 +/-    0.0001
Semi-Major Axis:     58.97820377 +/-    0.0067
Time of Perihelion: 2455889.7640 +/-      15.1
Perihelion:          38.47565082 +/-    0.0066
Aphelion:            79.48075671 +/-    0.0103
Period (y)              452.9450 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.00356299 +/-    0.0005
Ecliptic Y           29.26703196 +/-    0.0005
Ecliptic Z           -1.34451742 +/-    0.0000
Ecliptic XDOT        -0.00233961 +/-    0.0000
Ecliptic YDOT         0.00206192 +/-    0.0000
Ecliptic ZDOT        -0.00078917 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.51681515 +/-    0.0005
Geocenter to KBO     37.53274602 +/-    0.0007
# Hcoef:  7.72

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      

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     0.04       0.00    -0.13
  2   0.0003     -8.70    -0.03      -0.25    -0.00
  3   0.0006    -17.66     0.04      -0.72    -0.03
  4   0.0055   -157.35    -0.01      -7.76    -0.02
  5   0.8058  10400.73    -0.07   -1146.22     0.01
  6   0.8191  10289.35     0.03   -1183.45    -0.02
  7   0.8877   9210.45     0.01   -1361.94    -0.03
  8   0.8878   9206.98     0.07   -1362.26     0.03
  9   0.8932   9090.03     0.01   -1375.14     0.05
 10   0.9693   7131.07    -0.06   -1531.21     0.03
 11   0.9695   7125.54    -0.04   -1531.46     0.08
 12   0.9697   7120.03    -0.06   -1531.86    -0.02
 13   0.9724   7040.98    -0.01   -1536.58    -0.02
 14   0.9998   6259.26    -0.01   -1578.95     0.05
 15   1.0000   6252.17    -0.14   -1579.38    -0.04
 16   1.0514   4837.08    -0.02   -1639.69     0.07
 17   1.0518   4827.22     0.01   -1639.93     0.15
 18   1.1199   3349.05     0.00   -1684.26     0.05
 19   1.1392   3060.86     0.15   -1690.79    -0.00
 20   1.2183   2648.54    -0.07   -1700.98     0.10
 21   1.2346   2728.97     0.02   -1701.70     0.02
 22   1.8077  16545.59     0.02   -2708.62    -0.01
 23   1.8677  15811.58     0.14   -2881.91    -0.01
 24   1.8896  15389.18     0.03   -2939.51    -0.13
 25   1.8899  15383.51    -0.03   -2940.05    -0.03
 26   1.8951  15272.55    -0.14   -2953.18    -0.05
 27   1.8953  15268.38     0.09   -2953.61     0.00
 28   1.9608  13616.99    -0.03   -3095.81     0.04
 29   1.9662  13465.54     0.01   -3105.66    -0.05
 30   2.1140   9643.60     0.05   -3248.49    -0.07
 31   2.1140   9642.98     0.04   -3248.44    -0.01
 32   2.1957   8749.22    -0.00   -3247.90    -0.06
 33   3.0720  16772.57    -0.09   -4806.84     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.

15VK168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        59.682    59.708    59.657
ecceobj         0.355     0.356     0.355
incobj         14.261    14.261    14.261
qmin           37.301    37.258    37.332
qmax           81.508    81.560    81.418
amean          58.870    58.896    58.844
amin           58.216    58.259    58.182
amax           59.692    59.711    59.657
emean           0.351     0.351     0.350
emin            0.338     0.338     0.337
emax            0.366     0.366     0.365
imean          14.784    14.766    14.795
imin           14.367    14.354    14.378
imax           15.209    15.131    15.257
excite_mean     0.434     0.434     0.433
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       181.0     181.7     180.7
kozaiamp        180.0     179.9     180.0