Orbit Fit and Astrometric record for 15VT164

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: 15VT164   
# Created Fri Dec  3 02:13:36 2021
# Orbit generated from Bernstein formalism
# Fitting     25 observations of     26
# Arc:   1.44y
# First observation: 2015/08/20
#  Last observation: 2017/01/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000185   0.030553  -0.000004   0.003483   0.028612   0.000000
# Chi-squared of fit:    11.48 DOF:     44 RMS:  0.12
# Min/Max residuals:    -0.53    0.20
# Exact a, adot, b, bdot, g, gdot:
  1.675414E-05  3.003385E-02  1.474963E-06  3.449611E-03  2.832357E-02  8.453946E-03
# Covariance matrix:
  3.3676E-13  1.5482E-13  2.9837E-16  5.7328E-14  3.9016E-13  1.4465E-11
  1.5482E-13  9.8197E-13 -9.9062E-15  1.5504E-13  7.3679E-13  3.9128E-11
  2.9837E-16 -9.9062E-15  1.3207E-13 -1.3971E-13 -5.4006E-15 -5.9017E-13
  5.7328E-14  1.5504E-13 -1.3971E-13  2.8584E-13  1.5146E-13  8.3835E-12
  3.9016E-13  7.3679E-13 -5.4006E-15  1.5146E-13  8.4686E-13  3.8221E-11
  1.4465E-11  3.9128E-11 -5.9017E-13  8.3835E-12  3.8221E-11  2.1158E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.886368   54.093507    1.013154   -0.002591   -0.054020  2457255.064109
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:           54.01351 +/-     0.095
Argument of Peri:      253.46493 +/-     0.036
Long of Asc Node:       76.52592 +/-     0.003
Inclination:             7.03371 +/-     0.001
Eccentricity:         0.25824438 +/-    0.0016
Semi-Major Axis:     39.21067087 +/-    0.0348
Time of Perihelion: 2443794.8491 +/-      15.4
Perihelion:          29.08473538 +/-    0.0661
Aphelion:            49.33660636 +/-    0.0749
Period (y)              245.5357 +/-      0.33
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           21.52792929 +/-    0.0007
Ecliptic Y           28.01039001 +/-    0.0009
Ecliptic Z           -1.77778461 +/-    0.0001
Ecliptic XDOT        -0.00186500 +/-    0.0000
Ecliptic YDOT         0.00237090 +/-    0.0000
Ecliptic ZDOT         0.00029193 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.37222365 +/-    0.0008
Geocenter to KBO     35.30628145 +/-    0.0011
# Hcoef:  9.22

The following table shows the complete astrometric record for 15VT164. 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 (15VT164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.56332  03 29 50.419  +15 59 47.86  25.3w 15VT164   568  C~2lVY      
2015 09  07.60859  03 29 46.004  +15 58 37.12  24.9w 15VT164   568  C~2lVY      
2015 09  12.45964  03 29 38.675  +15 57 56.79  25.1w 15VT164   568  C~2lVY      
2015 10  07.50935  03 28 22.860  +15 52 29.43  23.4w 15VT164   568  C~2lVY      
2015 10  07.56783  03 28 22.576  +15 52 28.52  24.9w 15VT164   568  C~2lVY      
2015 10  09.54866  03 28 14.171  +15 51 55.28  24.9w 15VT164   568  C~2lVY      
2015 11  06.32308  03 25 51.033  +15 43 08.36  24.5r 15VT164   568  C~2lVY      
2015 11  06.38643  03 25 50.671  +15 43 07.02  24.9r 15VT164   568  C~2lVY      
2015 11  06.45719  03 25 50.235  +15 43 05.71  24.9r 15VT164   568  C~2lVY      
2015 11  07.47849  03 25 44.377  +15 42 45.23  24.9w 15VT164   568  C~2lVY      
2015 11  17.45967  03 24 46.250  +15 39 27.47  25.0w 15VT164   568  C~2lVY      
2015 11  17.54796  03 24 45.731  +15 39 25.61  24.3w 15VT164   568  C~2lVY      
2015 12  06.32589  03 22 59.095  +15 33 46.06  24.9w 15VT164   568  C~2lVY      
2015 12  06.45961  03 22 58.348  +15 33 43.99  25.1w 15VT164   568  C~2lVY      
2015 12  31.34718  03 21 03.667  +15 28 35.96  24.8w 15VT164   568  C~2lVY      
2016 01  07.37652  03 20 40.339  +15 27 49.50  25.0w 15VT164   568  C~2lVY      
2016 01  08.23883  03 20 37.812  +15 27 45.81  25.4w 15VT164   568  C~2lVY      
2016 02  11.27580  03 20 03.323  +15 29 27.91  25.0w 15VT164   568  C~2lVY      
2016 09  25.61718  03 35 52.648  +16 31 48.97  25.0w 15VT164   568  C~2lVY      
2016 10  10.55675  03 34 57.259  +16 28 15.03  25.1w 15VT164   568  C~2lVY      
2016 10  10.60523  03 34 57.043  +16 28 14.22  24.9w 15VT164   568  C~2lVY      
2016 10  28.47637  03 33 29.094  +16 23 00.91  25.1w 15VT164   568  C~2lVY      
2016 10  29.53828  03 33 23.322  +16 22 41.13  24.8w 15VT164   568  C~2lVY      
2016 11  02.59127  03 33 00.848  +16 21 24.59  25.0w 15VT164   568  C~2lVY      
2016 12  24.35153  03 28 18.848  +16 07 13.63  25.5w 15VT164   568  C~2lVY      
2017 01  27.33320  03 26 46.490  +16 04 59.71  25.2w 15VT164   568  C~2lVY      

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     0.00       0.00     0.09
     2   0.0494    -78.93    -0.09     -53.17     0.09
     3   0.0627   -191.25     0.00     -66.63    -0.19
     4   0.1313  -1331.68 (   0.56)   -117.68 (  -0.10)
     5   0.1314  -1335.87     0.09    -117.56     0.08
     6   0.1369  -1461.60     0.09    -120.14    -0.03
     7   0.2129  -3594.10     0.04    -122.81     0.04
     8   0.2131  -3599.49     0.11    -122.82    -0.07
     9   0.2133  -3605.92    -0.18    -122.53     0.11
    10   0.2161  -3692.97     0.04    -121.45     0.01
    11   0.2434  -4555.57    -0.08    -104.88     0.11
    12   0.2436  -4563.30    -0.04    -104.82    -0.03
    13   0.2950  -6140.91     0.01     -49.17    -0.05
    14   0.2954  -6151.88    -0.15     -48.47     0.10
    15   0.3635  -7835.50     0.04      70.61     0.20
    16   0.3828  -8174.03     0.06     111.01    -0.53
    17   0.3851  -8210.37     0.06     116.70    -0.03
    18   0.4783  -8667.53    -0.01     342.08     0.05
    19   1.1008   5525.37     0.10     618.28     0.10
    20   1.1417   4700.25     0.08     598.41    -0.08
    21   1.1418   4697.04     0.06     598.36    -0.10
    22   1.1907   3392.94    -0.07     594.51    -0.02
    23   1.1936   3307.53     0.06     595.10     0.02
    24   1.2047   2975.09    -0.32     597.98    -0.00
    25   1.3464  -1171.66     0.09     753.86     0.07
    26   1.4395  -2494.97    -0.00     950.66     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.

15VT164    quality flag:3

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

axisobj        39.667    39.776    39.560
ecceobj         0.265     0.269     0.262
incobj          7.025     7.025     7.025
qmin           28.675    28.396    28.686
qmax           50.925    50.968    51.018
amean          39.455    39.455    39.456
amin           38.985    39.062    38.892
amax           40.010    39.909    40.128
emean           0.228     0.250     0.258
emin            0.192     0.205     0.243
emax            0.273     0.279     0.274
imean           8.830     7.114     5.657
imin            5.623     4.690     5.114
imax           10.993    10.840     6.228
excite_mean     0.277     0.281     0.277
fracstop        1.000     1.000     1.000
cjmean          2.964     2.961     2.964

libcent 0       180.4     180.4     180.2
libamp  0        85.6      43.2     121.0
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       224.8     272.4     167.1
kozaiamp        179.9      56.0     180.0