Orbit Fit and Astrometric record for 15VF166

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: 15VF166   
# Created Tue Mar 26 01:10:22 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000071   0.032000   0.000002  -0.000454   0.028067   0.000000
# Chi-squared of fit:     4.84 DOF:   52 RMS:  0.07
# Min/Max residuals:    -0.19    0.17
# Exact a, adot, b, bdot, g, gdot:
  1.803132E-05  3.136550E-02 -3.794342E-07 -4.423840E-04  2.766653E-02 -6.162066E-03
# Covariance matrix:
  1.7371E-13 -4.8802E-14  1.0574E-15 -7.8223E-16  9.6074E-14  6.1897E-13
 -4.8802E-14  4.6787E-13  4.6868E-15 -1.0326E-14  2.6944E-13  8.9185E-12
  1.0574E-15  4.6868E-15  1.2785E-13 -9.2438E-14  4.2770E-15  1.1068E-13
 -7.8223E-16 -1.0326E-14 -9.2438E-14  1.0854E-13 -7.0077E-15 -2.6137E-13
  9.6074E-14  2.6944E-13  4.2770E-15 -7.0077E-15  3.0097E-13  5.9638E-12
  6.1897E-13  8.9185E-12  1.1068E-13 -2.6137E-13  5.9638E-12  2.2638E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.336686   52.456934    0.936817   -0.008722   -0.380172  2457273.121609
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          329.91923 +/-     0.024
Argument of Peri:      293.93175 +/-     0.064
Long of Asc Node:      173.59961 +/-     0.019
Inclination:             1.56977 +/-     0.000
Eccentricity:         0.31738176 +/-    0.0005
Semi-Major Axis:     47.73773457 +/-    0.0157
Time of Perihelion: 2467336.9785 +/-       6.3
Perihelion:          32.58664850 +/-    0.0246
Aphelion:            62.88882064 +/-    0.0303
Period (y)              329.8382 +/-      0.16
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.98951417 +/-    0.0004
Ecliptic Y           28.38163807 +/-    0.0006
Ecliptic Z           -0.84317107 +/-    0.0000
Ecliptic XDOT        -0.00283503 +/-    0.0000
Ecliptic YDOT         0.00140079 +/-    0.0000
Ecliptic ZDOT        -0.00002949 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.53417686 +/-    0.0005
Geocenter to KBO     36.14475410 +/-    0.0007
# Hcoef:  9.00

The following table shows the complete astrometric record for 15VF166. 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 (15VF166) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62082  03 21 37.488  +17 05 31.31  24.8w 15VF166   568  C~2lVe      
2015 09  12.48448  03 21 29.875  +17 04 50.91  25.1w 15VF166   568  C~2lVe      
2015 10  07.52687  03 20 14.449  +16 59 14.27  24.5w 15VF166   568  C~2lVe      
2015 10  07.58621  03 20 14.208  +16 59 13.14  24.6w 15VF166   568  C~2lVe      
2015 10  09.56611  03 20 05.970  +16 58 38.60  24.9w 15VF166   568  C~2lVe      
2015 11  06.33883  03 17 47.313  +16 49 16.98  24.1r 15VF166   568  C~2lVe      
2015 11  07.33788  03 17 41.800  +16 48 55.30  24.4r 15VF166   568  C~2lVe      
2015 11  07.38006  03 17 41.564  +16 48 54.34  24.4r 15VF166   568  C~2lVe      
2015 11  07.42224  03 17 41.324  +16 48 53.31  24.4r 15VF166   568  C~2lVe      
2015 12  06.36096  03 15 03.785  +16 38 45.29  24.7w 15VF166   568  C~2lVe      
2015 12  06.49848  03 15 03.080  +16 38 42.76  24.5w 15VF166   568  C~2lVe      
2016 01  08.25624  03 12 54.104  +16 30 58.22  25.2w 15VF166   568  C~2lVe      
2016 09  07.57941  03 28 58.094  +17 30 56.79        15VF166   568  C~2lVe      
2016 09  27.51468  03 28 13.598  +17 27 30.43  24.9w 15VF166   568  C~2lVe      
2016 09  29.49059  03 28 07.094  +17 27 02.94  24.8w 15VF166   568  C~2lVe      
2016 10  05.49370  03 27 45.253  +17 25 31.97  24.6w 15VF166   568  C~2lVe      
2016 10  07.49825  03 27 37.307  +17 24 59.85  24.3w 15VF166   568  C~2lVe      
2016 10  07.59395  03 27 36.897  +17 24 58.16  24.8w 15VF166   568  C~2lVe      
2016 10  09.49835  03 27 29.056  +17 24 26.25  24.8w 15VF166   568  C~2lVe      
2016 10  09.57103  03 27 28.751  +17 24 25.01  24.8w 15VF166   568  C~2lVe      
2016 11  02.49681  03 25 31.075  +17 16 44.77  24.8w 15VF166   568  C~2lVe      
2016 11  04.47292  03 25 20.240  +17 16 03.51  24.5w 15VF166   568  C~2lVe      
2016 12  28.46047  03 20 44.833  +16 59 21.79  24.6w 15VF166   568  C~2lVe      
2016 12  29.39076  03 20 41.462  +16 59 10.37  24.6w 15VF166   568  C~2lVe      
2017 01  27.29772  03 19 39.038  +16 56 08.10  24.8w 15VF166   568  C~2lVe      
2017 01  27.30287  03 19 39.030  +16 56 08.03  24.7w 15VF166   568  C~2lVe      
2017 09  23.56691  03 35 57.915  +17 53 25.38  24.9w 15VF166   568  C~2lVe      
2017 12  13.37172  03 29 21.756  +17 29 10.06  24.6w 15VF166   568  C~2lVe      
2017 12  13.40930  03 29 21.577  +17 29 09.50  24.5w 15VF166   568  C~2lVe      

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    -0.02       0.00     0.03
  2   0.0133   -115.83     0.13     -11.39    -0.09
  3   0.0819  -1247.66    -0.09     -61.61     0.04
  4   0.0820  -1251.29    -0.02     -61.82    -0.09
  5   0.0875  -1374.38    -0.06     -65.03    -0.02
  6   0.1635  -3442.21     0.06     -96.58     0.01
  7   0.1662  -3524.30     0.07     -97.08     0.09
  8   0.1663  -3527.83     0.07     -97.13     0.04
  9   0.1665  -3531.42    -0.00     -97.23    -0.06
 10   0.2457  -5875.98    -0.07     -95.90    -0.04
 11   0.2461  -5886.43    -0.01     -95.69     0.06
 12   0.3358  -7799.64     0.00     -56.35    -0.06
 13   1.0019   6493.17     0.04     -93.75     0.05
 14   1.0565   5824.83    -0.11    -137.98    -0.01
 15   1.0619   5727.79    -0.09    -141.80     0.07
 16   1.0784   5402.22    -0.05    -153.19    -0.19
 17   1.0839   5284.02     0.16    -156.35     0.14
 18   1.0841   5277.91    -0.05    -156.55     0.08
 19   1.0893   5161.21     0.02    -159.85    -0.00
 20   1.0895   5156.67     0.12    -159.97    -0.04
 21   1.1550   3409.52    -0.01    -188.89    -0.01
 22   1.1604   3248.90     0.03    -190.23     0.04
 23   1.3083   -824.27    -0.10    -165.48     0.10
 24   1.3108   -873.94    -0.01    -164.21     0.01
 25   1.3899  -1786.46     0.02    -111.70    -0.02
 26   1.3900  -1786.59    -0.06    -111.74    -0.07
 27   2.0450  12654.29    -0.12    -223.80     0.01
 28   2.2663   6795.69    -0.01    -279.98    -0.06
 29   2.2664   6793.07     0.17    -279.90    -0.02

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.

15VF166    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        48.214    48.247    48.182
ecceobj         0.319     0.320     0.318
incobj          1.564     1.564     1.564
qmin           32.192    32.165    32.219
qmax           64.083    64.018    64.059
amean          47.797    47.797    47.798
amin           47.314    47.346    47.302
amax           48.394    48.383    48.428
emean           0.311     0.311     0.311
emin            0.298     0.298     0.297
emax            0.324     0.324     0.324
imean           2.458     2.502     2.332
imin            1.706     1.706     1.706
imax            2.830     2.924     2.721
excite_mean     0.314     0.314     0.313
fracstop        1.000     1.000     1.000
cjmean          3.023     3.022     3.023

libcent 0        70.8      70.5      71.4
libamp  0        10.0       5.2      15.8
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       190.1     191.5     202.1
kozaiamp        180.0     180.0     179.9