Orbit Fit and Astrometric record for 15VK167

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: 15VK167   
# Created Sat Jan 19 02:10:31 2019
# Orbit generated from Bernstein formalism
# Fitting   38 observations of   39
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000300   0.030143  -0.000052  -0.006349   0.028232   0.000000
# Chi-squared of fit:    14.29 DOF:   70 RMS:  0.11
# Min/Max residuals:    -0.26    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.851009E-05  3.099517E-02 -6.072222E-06 -6.524167E-03  2.873429E-02  7.012755E-03
# Covariance matrix:
  2.9505E-13 -3.3290E-13 -2.6776E-14  5.1000E-14 -1.2787E-13 -2.6094E-12
 -3.3290E-13  5.1153E-13  4.8384E-14 -9.2211E-14  2.3438E-13  4.7173E-12
 -2.6776E-14  4.8384E-14  1.6126E-13 -9.1635E-14  2.4595E-14  5.0281E-13
  5.1000E-14 -9.2211E-14 -9.1635E-14  7.6427E-14 -4.8457E-14 -9.5867E-13
 -1.2787E-13  2.3438E-13  2.4595E-14 -4.8457E-14  2.1600E-13  2.4612E-12
 -2.6094E-12  4.7173E-12  5.0281E-13 -9.5867E-13  2.4612E-12  4.9038E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.585749   47.850055   -0.113901   -0.027054   -0.982526  2456978.777218
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:           41.96229 +/-     0.009
Argument of Peri:      119.63809 +/-     0.020
Long of Asc Node:      220.75898 +/-     0.000
Inclination:            11.99964 +/-     0.000
Eccentricity:         0.26423230 +/-    0.0002
Semi-Major Axis:     42.30966041 +/-    0.0057
Time of Perihelion: 2445253.5539 +/-       1.1
Perihelion:          31.13008149 +/-    0.0104
Aphelion:            53.48923933 +/-    0.0119
Period (y)              275.2121 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.91750256 +/-    0.0004
Ecliptic Y           26.59839088 +/-    0.0004
Ecliptic Z           -0.96329042 +/-    0.0000
Ecliptic XDOT        -0.00175712 +/-    0.0000
Ecliptic YDOT         0.00245934 +/-    0.0000
Ecliptic ZDOT        -0.00063978 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.78336561 +/-    0.0004
Geocenter to KBO     34.80162044 +/-    0.0006
# Hcoef:  9.51

The following table shows the complete astrometric record for 15VK167. 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 (15VK167) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27644  03 03 23.397  +15 37 44.13  24.5r 15VK167   568  C~2lVi      
2014 11  17.38513  03 03 22.802  +15 37 40.82  24.6r 15VK167   568  C~2lVi      
2014 11  17.49897  03 03 22.179  +15 37 37.81  25.6r 15VK167   568  C~2lVi      
2014 11  19.28749  03 03 12.252  +15 36 50.41  24.8r 15VK167   568  C~2lVi      
2014 11  23.39103  03 02 49.684  +15 35 02.85  24.6r 15VK167   568  C~2lVi      
2015 08  11.61007  03 15 52.895  +16 14 25.84  25.5w 15VK167   568  C~2lVi      
2015 09  06.62757  03 15 53.629  +16 11 31.37  25.1w 15VK167   568  C~2lVi      
2015 10  07.45292  03 14 24.611  +16 02 27.67  25.2w 15VK167   568  C~2lVi      
2015 10  08.45753  03 14 20.330  +16 02 05.12  25.2w 15VK167   568  C~2lVi      
2015 10  08.51654  03 14 20.063  +16 02 03.69  25.1w 15VK167   568  C~2lVi      
2015 11  07.36426  03 11 48.302  +15 49 35.25  24.7r 15VK167   568  C~2lVi      
2015 11  07.40638  03 11 48.060  +15 49 34.13  24.7r 15VK167   568  C~2lVi      
2015 11  07.44859  03 11 47.818  +15 49 33.01  24.8r 15VK167   568  C~2lVi      
2015 11  10.53471  03 11 30.550  +15 48 12.12  24.6w 15VK167   568  C~2lVi      
2015 12  06.39016  03 09 10.265  +15 37 29.59  24.9w 15VK167   568  C~2lVi      
2015 12  13.32462  03 08 36.898  +15 35 00.35  25.0w 15VK167   568  C~2lVi      
2015 12  13.38310  03 08 36.631  +15 34 59.21  25.0w 15VK167   568  C~2lVi      
2016 01  01.37764  03 07 22.919  +15 29 33.92  25.1w 15VK167   568  C~2lVi      
2016 01  07.32440  03 07 06.381  +15 28 21.67  26.1w 15VK167   568  C~2lVi      
2016 02  04.30735  03 06 39.320  +15 26 22.61  25.1w 15VK167   568  C~2lVi      
2016 02  04.32117  03 06 39.326  +15 26 22.50  25.8w 15VK167   568  C~2lVi      
2016 02  04.32803  03 06 39.345  +15 26 22.49  25.4w 15VK167   568  C~2lVi      
2016 02  05.26985  03 06 39.969  +15 26 25.14  25.2w 15VK167   568  C~2lVi      
2016 02  10.29068  03 06 45.059  +15 26 45.71  25.5w 15VK167   568  C~2lVi      
2016 09  07.56206  03 23 05.334  +16 16 37.96  25.2w 15VK167   568  C~2lVi      
2016 09  26.62090  03 22 20.639  +16 11 37.61  25.4w 15VK167   568  C~2lVi      
2016 10  10.43747  03 21 27.728  +16 06 51.29  25.3w 15VK167   568  C~2lVi      
2016 10  10.49616  03 21 27.479  +16 06 49.99  25.2w 15VK167   568  C~2lVi      
2016 10  10.51394  03 21 27.394  +16 06 49.57  25.0w 15VK167   568  C~2lVi      
2016 11  04.38927  03 19 22.219  +15 56 44.69  25.0w 15VK167   568  C~2lVi      
2016 12  24.30148  03 15 06.647  +15 38 10.11  25.4w 15VK167   568  C~2lVi      
2017 01  02.40371  03 14 34.946  +15 36 00.80  25.2w 15VK167   568  C~2lVi      
2017 01  26.29235  03 13 50.865  +15 33 10.41  25.6w 15VK167   568  C~2lVi      
2017 01  26.34976  03 13 50.843  +15 33 10.18  25.5w 15VK167   568  C~2lVi      
2017 09  16.63393  03 29 58.433  +16 19 06.61  25.6w 15VK167   568  C~2lVi      
2017 09  17.59434  03 29 56.357  +16 18 52.09  25.1w 15VK167   568  C~2lVi      
2017 09  23.57295  03 29 41.379  +16 17 14.29  25.0w 15VK167   568  C~2lVi      
2017 12  16.35926  03 22 54.924  +15 46 14.52  25.1w 15VK167   568  C~2lVi      
2017 12  16.37785  03 22 54.847  +15 46 14.18  24.9w 15VK167   568  C~2lVi      

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 (  -0.30)      0.00 (   0.51)
  2   0.0003     -9.18    -0.13      -0.80     0.02
  3   0.0006    -18.66     0.19      -1.20    -0.04
  4   0.0055   -169.58     0.08      -6.97     0.09
  5   0.0167   -512.68    -0.02     -19.79    -0.04
  6   0.7319  11013.76    -0.02    -800.05     0.12
  7   0.8032  10978.03    -0.19    -971.40     0.29
  8   0.8875   9593.84     0.26   -1157.69    -0.00
  9   0.8903   9528.22     0.20   -1163.10     0.05
 10   0.8905   9524.12     0.07   -1163.46    -0.02
 11   0.9722   7211.04    -0.18   -1302.20    -0.12
 12   0.9723   7207.37    -0.23   -1302.34    -0.12
 13   0.9724   7203.70    -0.26   -1302.49    -0.13
 14   0.9809   6941.61     0.02   -1313.67     0.08
 15   1.0516   4816.01     0.03   -1386.78     0.04
 16   1.0706   4311.29     0.01   -1399.78     0.02
 17   1.0708   4307.26     0.14   -1399.83     0.05
 18   1.1228   3193.28    -0.13   -1423.05     0.06
 19   1.1391   2943.51    -0.07   -1427.32    -0.05
 20   1.2157   2534.55    -0.02   -1434.92    -0.02
 21   1.2157   2534.60    -0.08   -1435.05    -0.15
 22   1.2157   2534.86     0.13   -1435.13    -0.23
 23   1.2183   2544.27     0.00   -1435.05    -0.07
 24   1.2321   2620.69     0.04   -1435.39     0.00
 25   1.8078  17092.35     0.13   -2287.88     0.04
 26   1.8599  16388.77    -0.00   -2414.37    -0.20
 27   1.8978  15573.68    -0.12   -2495.99     0.10
 28   1.8979  15569.86     0.06   -2496.33     0.06
 29   1.8980  15568.56    -0.03   -2496.42     0.06
 30   1.9661  13659.38     0.12   -2615.39    -0.01
 31   2.1027   9794.54     0.01   -2725.65     0.00
 32   2.1277   9317.63    -0.08   -2729.22     0.14
 33   2.1931   8657.01     0.00   -2724.57     0.08
 34   2.1932   8656.64     0.16   -2724.71    -0.09
 35   2.8319  22944.11    -0.01   -3643.82     0.03
 36   2.8345  22911.17    -0.03   -3650.54     0.13
 37   2.8509  22675.23    -0.01   -3692.19    -0.01
 38   3.0803  16479.79    -0.08   -4018.71    -0.04
 39   3.0804  16478.62     0.06   -4018.75    -0.08

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.

15VK167    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.739    42.757    42.721
ecceobj         0.272     0.272     0.271
incobj         11.965    11.965    11.965
qmin           30.565    30.498    30.570
qmax           54.752    54.765    54.699
amean          42.326    42.326    42.326
amin           41.896    41.904    41.901
amax           42.850    42.846    42.842
emean           0.265     0.266     0.264
emin            0.253     0.254     0.253
emax            0.278     0.278     0.277
imean          12.865    12.797    12.864
imin           12.626    12.545    12.629
imax           13.103    13.080    13.103
excite_mean     0.346     0.346     0.346
fracstop        1.000     1.000     1.000
cjmean          2.941     2.940     2.941

libcent 0       180.3     179.1     180.0
libamp  0        52.0      54.4      52.7
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        95.8     108.2      93.3
kozaiamp         22.3      12.2      24.4