Orbit Fit and Astrometric record for 15VY164

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: 15VY164   
# Created Fri Dec  3 02:13:36 2021
# Orbit generated from Bernstein formalism
# Fitting     31 observations of     31
# Arc:   2.32y
# First observation: 2015/08/20
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000251   0.038229  -0.000006  -0.000339   0.031537   0.000000
# Chi-squared of fit:    15.17 DOF:     56 RMS:  0.12
# Min/Max residuals:    -0.36    0.32
# Exact a, adot, b, bdot, g, gdot:
  2.043265E-05  3.747376E-02 -2.929588E-07 -3.342730E-04  3.115703E-02  2.286445E-03
# Covariance matrix:
  2.1964E-13  9.3261E-15  2.4995E-15 -1.9559E-15  1.5990E-13  1.7605E-12
  9.3261E-15  7.0832E-13  7.3147E-15 -1.6508E-14  3.4762E-13  1.5186E-11
  2.4995E-15  7.3147E-15  9.2994E-14 -8.6755E-14  5.7281E-15  1.9211E-13
 -1.9559E-15 -1.6508E-14 -8.6755E-14  1.5884E-13 -9.6023E-15 -4.6325E-13
  1.5990E-13  3.4762E-13  5.7281E-15 -9.6023E-15  3.0932E-13  8.7985E-12
  1.7605E-12  1.5186E-11  1.9211E-13 -4.6325E-13  8.7985E-12  4.2647E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.165754   52.925949    1.011821   -0.001391   -0.074915  2457255.076589
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:            6.94261 +/-     0.132
Argument of Peri:      234.48298 +/-     0.199
Long of Asc Node:      166.39454 +/-     0.025
Inclination:             1.28547 +/-     0.000
Eccentricity:         0.18396293 +/-    0.0002
Semi-Major Axis:     39.34103016 +/-    0.0039
Time of Perihelion: 2455512.3511 +/-      33.1
Perihelion:          32.10373882 +/-    0.0070
Aphelion:            46.57832150 +/-    0.0078
Period (y)              246.7612 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.19305109 +/-    0.0004
Ecliptic Y           25.05199798 +/-    0.0005
Ecliptic Z           -0.65296578 +/-    0.0000
Ecliptic XDOT        -0.00250853 +/-    0.0000
Ecliptic YDOT         0.00213855 +/-    0.0000
Ecliptic ZDOT        -0.00003340 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.18366479 +/-    0.0004
Geocenter to KBO     32.09548969 +/-    0.0006
# Hcoef:  9.85

The following table shows the complete astrometric record for 15VY164. 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 (15VY164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.57580  03 23 20.657  +17 22 32.85  25.5w 15VY164   568  C~2lVY      
2015 09  07.61675  03 23 15.941  +17 21 31.35  25.6w 15VY164   568  C~2lVY      
2015 10  07.52101  03 21 45.053  +17 14 49.45  25.1w 15VY164   568  C~2lVY      
2015 10  07.58040  03 21 44.779  +17 14 48.52  24.8w 15VY164   568  C~2lVZ      
2015 10  09.56029  03 21 35.610  +17 14 10.66  25.0w 15VY164   568  C~2lVZ      
2015 11  06.33360  03 19 00.426  +17 03 52.70  24.5r 15VY164   568  C~2lVZ      
2015 11  06.39716  03 19 00.037  +17 03 50.77  24.3r 15VY164   568  C~2lVZ      
2015 11  06.40423  03 18 59.978  +17 03 50.89  24.4r 15VY164   568  C~2lVZ      
2015 11  06.47375  03 18 59.547  +17 03 49.07  25.1r 15VY164   568  C~2lVZ      
2015 11  07.49015  03 18 53.249  +17 03 24.59  25.1w 15VY164   568  C~2lVZ      
2015 11  17.47136  03 17 50.797  +16 59 22.86  25.2w 15VY164   568  C~2lVZ      
2015 11  17.47779  03 17 50.754  +16 59 22.56  25.0w 15VY164   568  C~2lVZ      
2015 11  17.56554  03 17 50.213  +16 59 20.84  24.9w 15VY164   568  C~2lVZ      
2015 12  06.33759  03 15 56.845  +16 52 09.64  24.9w 15VY164   568  C~2lVZ      
2015 12  06.34344  03 15 56.812  +16 52 09.44  25.1w 15VY164   568  C~2lVZ      
2015 12  06.48092  03 15 56.020  +16 52 06.28  24.9w 15VY164   568  C~2lVZ      
2015 12  31.36453  03 13 57.368  +16 44 53.93  25.0w 15VY164   568  C~2lVZ      
2016 01  01.34872  03 13 53.800  +16 44 41.45  25.5w 15VY164   568  C~2lVZ      
2016 01  07.41130  03 13 34.151  +16 43 35.02  24.8w 15VY164   568  C~2lVZ      
2016 01  07.42868  03 13 34.087  +16 43 34.69  25.2w 15VY164   568  C~2lVZ      
2016 01  08.25624  03 13 31.770  +16 43 26.84  25.7w 15VY164   568  C~2lVZ      
2016 02  05.28768  03 13 01.210  +16 42 23.66  25.7w 15VY164   568  C~2lVZ      
2016 02  10.30807  03 13 06.351  +16 42 54.87  25.4w 15VY164   568  C~2lVZ      
2016 09  07.60255  03 32 03.684  +17 52 10.70        15VY164   568  C~2lVZ      
2016 09  27.53124  03 31 16.441  +17 48 39.61  24.8w 15VY164   568  C~2lVZ      
2016 11  02.47368  03 28 17.181  +17 37 07.36  25.4w 15VY164   568  C~2lVZ      
2016 11  04.44969  03 28 05.109  +17 36 22.52  25.5w 15VY164   568  C~2lVZ      
2016 12  28.46047  03 22 56.811  +17 17 58.38  25.6w 15VY164   568  C~2lVZ      
2016 12  29.39076  03 22 53.023  +17 17 45.72  25.0w 15VY164   568  C~2lVZ      
2017 01  27.29772  03 21 43.314  +17 14 20.18  25.1w 15VY164   568  C~2lVZ      
2017 12  13.40930  03 33 06.193  +17 53 10.44  25.2w 15VY164   568  C~2lVZ      

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    -0.29       0.00     0.03
     2   0.0494    -80.80    -0.15     -42.56     0.08
     3   0.1313  -1441.74     0.06    -103.04    -0.12
     4   0.1314  -1445.78     0.14    -102.94     0.05
     5   0.1369  -1582.44    -0.05    -106.29    -0.10
     6   0.2129  -3891.18     0.03    -136.46     0.19
     7   0.2131  -3897.07     0.07    -136.89    -0.25
     8   0.2131  -3897.85    -0.06    -136.56     0.09
     9   0.2133  -3904.30     0.01    -136.73    -0.08
    10   0.2161  -3997.90     0.07    -137.20    -0.02
    11   0.2434  -4926.11     0.05    -140.16     0.02
    12   0.2434  -4926.79    -0.02    -140.29    -0.11
    13   0.2436  -4934.73     0.32    -139.95     0.24
    14   0.2950  -6619.06     0.14    -134.59     0.00
    15   0.2951  -6619.57     0.13    -134.66    -0.08
    16   0.2954  -6631.38     0.11    -134.75    -0.30
    17   0.3636  -8391.23     0.16    -106.21     0.06
    18   0.3663  -8444.05    -0.04    -104.77    -0.02
    19   0.3828  -8734.33    -0.15     -94.58     0.22
    20   0.3829  -8735.31    -0.36     -94.66     0.12
    21   0.3852  -8769.55     0.00     -93.46    -0.08
    22   0.4619  -9210.54    -0.11     -38.58    -0.09
    23   0.4757  -9130.90    -0.11     -27.96     0.03
    24   1.0514   7688.32     0.05    -113.97    -0.03
    25   1.1060   6981.89    -0.01    -156.56     0.11
    26   1.2044   4327.02    -0.05    -205.47    -0.01
    27   1.2098   4148.62    -0.03    -206.63     0.12
    28   1.3577   -399.50     0.04    -179.77     0.03
    29   1.3602   -455.19    -0.01    -178.36     0.04
    30   1.4393  -1473.26     0.08    -125.04    -0.06
    31   2.3158   8570.40    -0.03    -269.76    -0.10

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.

15VY164    quality flag:3

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

axisobj        39.768    39.793    39.744
ecceobj         0.193     0.193     0.192
incobj          1.282     1.282     1.282
qmin           31.632    31.618    31.641
qmax           47.461    47.681    47.693
amean          39.454    39.456    39.456
amin           39.077    39.099    39.069
amax           39.786    39.870    39.899
emean           0.180     0.181     0.180
emin            0.167     0.166     0.165
emax            0.194     0.196     0.196
imean           1.725     1.718     1.735
imin            1.346     1.349     1.345
imax            2.199     2.197     2.208
excite_mean     0.183     0.183     0.183
fracstop        1.000     1.000     1.000
cjmean          3.014     3.014     3.014

libcent 0       179.9     180.0     179.9
libamp  0        47.6      41.1      56.4
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       179.3     177.8     181.7
kozaiamp        179.9     179.9     180.0