Orbit Fit and Astrometric record for 15VL164

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: 15VL164   
# Created Wed Feb 20 02:10:37 2019
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
   0.000144   0.041905  -0.000046  -0.008547   0.033888   0.000000
# Chi-squared of fit:    11.81 DOF:   56 RMS:  0.11
# Min/Max residuals:    -0.31    0.32
# Exact a, adot, b, bdot, g, gdot:
  1.900369E-05  4.246091E-02 -4.526427E-06 -8.669324E-03  3.419365E-02  2.228578E-03
# Covariance matrix:
  8.8575E-13 -9.9726E-13 -1.1208E-13  1.6951E-13 -4.1200E-13 -5.7050E-12
 -9.9726E-13  1.2681E-12  1.5235E-13 -2.3016E-13  5.2031E-13  7.7518E-12
 -1.1208E-13  1.5235E-13  2.4877E-13 -1.4598E-13  6.4730E-14  9.9104E-13
  1.6951E-13 -2.3016E-13 -1.4598E-13  1.1948E-13 -9.8649E-14 -1.4966E-12
 -4.1200E-13  5.2031E-13  6.4730E-14 -9.8649E-14  3.5009E-13  3.3035E-12
 -5.7050E-12  7.7518E-12  9.9104E-13 -1.4966E-12  3.3035E-12  5.0418E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.229261   45.960392   -0.148672   -0.020827   -0.978000  2456978.916588
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:            9.73207 +/-     0.026
Argument of Peri:      169.66007 +/-     0.045
Long of Asc Node:      220.44174 +/-     0.000
Inclination:            11.60073 +/-     0.000
Eccentricity:         0.23840920 +/-    0.0001
Semi-Major Axis:     39.37756745 +/-    0.0027
Time of Perihelion: 2454530.5864 +/-       6.6
Perihelion:          29.98959297 +/-    0.0037
Aphelion:            48.76554193 +/-    0.0046
Period (y)              247.1050 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.89535995 +/-    0.0003
Ecliptic Y           21.82636516 +/-    0.0004
Ecliptic Z           -0.62755573 +/-    0.0000
Ecliptic XDOT        -0.00233459 +/-    0.0000
Ecliptic YDOT         0.00247596 +/-    0.0000
Ecliptic ZDOT        -0.00069771 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.22250998 +/-    0.0004
Geocenter to KBO     29.24519236 +/-    0.0005
# Hcoef: 10.33

The following table shows the complete astrometric record for 15VL164. 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 (15VL164) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.41581  02 55 26.885  +15 26 17.19  24.8r 15VL164   568  C~2lVX      
2015 08  11.62323  03 11 28.668  +16 13 35.94  25.0w 15VL164   568  C~2lVX      
2015 09  07.53281  03 11 30.225  +16 10 04.51  25.1w 15VL164   568  C~2lVX      
2015 09  12.52956  03 11 20.349  +16 08 45.21  25.8w 15VL164   568  C~2lVX      
2015 10  08.47583  03 09 43.970  +15 59 03.56  25.5w 15VL164   568  C~2lVX      
2015 10  08.53403  03 09 43.689  +15 59 01.86  25.2w 15VL164   568  C~2lVX      
2015 11  06.29151  03 06 54.876  +15 44 37.60  24.5r 15VL164   568  C~2lVX      
2015 11  06.35485  03 06 54.471  +15 44 35.36  24.5r 15VL164   568  C~2lVX      
2015 11  06.42547  03 06 54.011  +15 44 33.26  25.4r 15VL164   568  C~2lVX      
2015 11  06.49480  03 06 53.562  +15 44 30.97  24.8r 15VL164   568  C~2lVX      
2015 11  07.51356  03 06 47.000  +15 43 58.73  24.9w 15VL164   568  C~2lVX      
2015 11  17.27960  03 05 43.977  +15 38 51.63  24.8w 15VL164   568  C~2lVX      
2015 11  17.32888  03 05 43.648  +15 38 50.20  25.0w 15VL164   568  C~2lVX      
2015 12  13.34220  03 03 09.368  +15 26 33.47  25.3w 15VL164   568  C~2lVX      
2015 12  13.40075  03 03 09.077  +15 26 32.05  25.3w 15VL164   568  C~2lVX      
2016 01  01.39556  03 01 48.007  +15 20 07.61  25.4w 15VL164   568  C~2lVX      
2016 01  07.34177  03 01 30.608  +15 18 43.66  25.3w 15VL164   568  C~2lVX      
2016 09  26.58845  03 20 40.657  +16 13 13.56  25.8w 15VL164   568  C~2lVX      
2016 10  10.39070  03 19 40.083  +16 07 33.91  25.7w 15VL164   568  C~2lVX      
2016 10  10.44903  03 19 39.770  +16 07 32.38  25.4w 15VL164   568  C~2lVX      
2016 10  27.49679  03 18 03.926  +15 59 26.86  25.6w 15VL164   568  C~2lVX      
2016 11  03.52184  03 17 20.010  +15 55 54.95  25.2w 15VL164   568  C~2lVX      
2016 12  24.30148  03 12 20.821  +15 33 17.84  25.2w 15VL164   568  C~2lVX      
2017 01  02.40371  03 11 45.589  +15 30 45.66        15VL164   568  C~2lVX      
2017 01  26.29235  03 11 00.246  +15 27 31.53  25.2w 15VL164   568  C~2lVX      
2017 01  26.30729  03 11 00.252  +15 27 31.56  25.3w 15VL164   568  C~2lVX      
2017 09  16.63393  03 31 12.882  +16 24 10.41  25.2w 15VL164   568  C~2lVX      
2017 09  17.59434  03 31 10.629  +16 23 53.29  25.3w 15VL164   568  C~2lVX      
2017 09  23.57295  03 30 54.234  +16 21 59.07  25.6w 15VL164   568  C~2lVX      
2017 12  16.35926  03 23 04.784  +15 45 14.43  24.8w 15VL164   568  C~2lVX      
2017 12  16.37785  03 23 04.676  +15 45 14.03  25.3w 15VL164   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     0.13       0.00     0.11
  2   0.7316  14143.67    -0.13   -1130.29    -0.31
  3   0.8052  14108.37    -0.07   -1340.47     0.03
  4   0.8189  13949.28     0.09   -1378.69    -0.07
  5   0.8900  12448.54    -0.09   -1564.16     0.06
  6   0.8901  12444.17     0.10   -1564.70    -0.13
  7   0.9689   9857.50    -0.14   -1732.71     0.21
  8   0.9690   9851.25    -0.10   -1733.27    -0.07
  9   0.9692   9844.27    -0.03   -1733.47     0.04
 10   0.9694   9837.39     0.01   -1733.89    -0.07
 11   0.9722   9737.22     0.00   -1738.92    -0.06
 12   0.9989   8775.79     0.13   -1784.04    -0.08
 13   0.9991   8770.82     0.05   -1784.11     0.04
 14   1.0703   6421.17    -0.15   -1874.58     0.02
 15   1.0705   6416.73     0.10   -1874.77    -0.04
 16   1.1225   5182.55    -0.18   -1916.63     0.24
 17   1.1387   4917.24    -0.01   -1926.72     0.09
 18   1.8595  21868.21     0.01   -3256.78    -0.08
 19   1.8973  20927.36     0.21   -3359.04    -0.07
 20   1.8974  20922.55     0.01   -3359.35    -0.01
 21   1.9441  19448.15    -0.02   -3468.07     0.11
 22   1.9633  18775.64    -0.03   -3506.58     0.05
 23   2.1024  14221.27     0.05   -3667.98    -0.11
 24   2.1273  13687.42     0.32   -3677.68     0.12
 25   2.1927  13000.94    -0.15   -3687.93    -0.02
 26   2.1927  13001.04     0.05   -3687.93    -0.01
 27   2.8315  30994.65     0.14   -4938.40    -0.01
 28   2.8342  30958.22    -0.17   -4947.07     0.01
 29   2.8505  30695.73     0.03   -4999.95     0.03
 30   3.0799  23467.55    -0.02   -5429.08    -0.04
 31   3.0800  23465.92    -0.13   -5429.07    -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.

15VL164    quality flag:3

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

axisobj        39.735    39.748    39.723
ecceobj         0.245     0.246     0.245
incobj         11.571    11.571    11.571
qmin           27.912    27.901    27.943
qmax           51.703    51.702    51.625
amean          39.455    39.454    39.455
amin           39.035    39.035    39.026
amax           40.000    39.967    39.963
emean           0.244     0.246     0.243
emin            0.186     0.188     0.189
emax            0.293     0.294     0.292
imean          11.835    11.766    11.927
imin            8.781     8.638     8.901
imax           14.785    14.797    14.773
excite_mean     0.322     0.322     0.322
fracstop        1.000     1.000     1.000
cjmean          2.933     2.933     2.933

libcent 0       179.7     179.5     180.2
libamp  0        72.0      68.9      76.8
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        84.9      84.9      85.7
kozaiamp         76.2      76.2      76.2