Orbit Fit and Astrometric record for 15VS164

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: 15VS164   
# Created Sat Nov 27 02:13:41 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     28 observations of     28
# Arc:   5.24y
# First observation: 2015/08/20
#  Last observation: 2020/11/14
# Chi-squared of fit:     5.74 DOF:     50 RMS:  0.08
# Min/Max residuals:    -0.14    0.21
# Exact a, adot, b, bdot, g, gdot:
  1.610321E-05  2.962558E-02 -6.598780E-06 -1.111721E-02  2.848209E-02 -2.707571E-03
# Covariance matrix:
  2.1313E-13 -1.0842E-13 -1.3576E-14  4.0428E-14  1.1697E-13 -6.3022E-13
 -1.0842E-13  2.9229E-13  4.9167E-14 -1.2100E-13  5.0200E-14  1.9668E-12
 -1.3576E-14  4.9167E-14  8.1479E-14 -4.7689E-14  1.1597E-14  3.6636E-13
  4.0428E-14 -1.2100E-13 -4.7689E-14  8.3987E-14 -2.0410E-14 -9.0222E-13
  1.1697E-13  5.0200E-14  1.1597E-14 -2.0410E-14  1.6348E-13  3.6297E-13
 -6.3022E-13  1.9668E-12  3.6636E-13 -9.0222E-13  3.6297E-13  1.4663E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.496047   54.353789    1.013398   -0.001157   -0.049338  2457255.056669
# Heliocentric elements and errors
Epoch:              2457254.5000  =  2015/08/20
Mean Anomaly:          319.73521 +/-     0.026
Argument of Peri:      237.89097 +/-     0.041
Long of Asc Node:      228.75792 +/-     0.000
Inclination:            20.73777 +/-     0.000
Eccentricity:         0.15576251 +/-    0.0001
Semi-Major Axis:     39.37203339 +/-    0.0026
Time of Perihelion: 2467347.1007 +/-      10.3
Perihelion:          33.23934654 +/-    0.0042
Aphelion:            45.50472023 +/-    0.0047
Period (y)              247.0529 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           21.30253337 +/-    0.0003
Ecliptic Y           27.97089982 +/-    0.0004
Ecliptic Z           -0.91685374 +/-    0.0000
Ecliptic XDOT        -0.00248406 +/-    0.0000
Ecliptic YDOT         0.00141915 +/-    0.0000
Ecliptic ZDOT        -0.00106143 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.17122025 +/-    0.0004
Geocenter to KBO     35.10986101 +/-    0.0005
# Hcoef:  8.57

The following table shows the complete astrometric record for 15VS164. 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 (15VS164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.55588  03 29 29.053  +17 24 30.58  24.5w 15VS164   568  C~2lVY      
2015 09  07.60452  03 29 26.556  +17 21 36.07  24.0w 15VS164   568  C~2lVY      
2015 09  12.45550  03 29 19.646  +17 20 26.99  24.3w 15VS164   568  C~2lVY      
2015 10  07.50351  03 28 05.560  +17 12 18.26  24.4w 15VS164   568  C~2lVY      
2015 10  07.56195  03 28 05.317  +17 12 16.93  24.2w 15VS164   568  C~2lVY      
2015 10  09.54258  03 27 57.019  +17 11 30.04  24.3w 15VS164   568  C~2lVY      
2015 11  06.31779  03 25 34.980  +16 59 13.45  24.0r 15VS164   568  C~2lVY      
2015 11  06.38117  03 25 34.614  +16 59 11.85  24.1r 15VS164   568  C~2lVY      
2015 11  06.45191  03 25 34.204  +16 59 09.70  23.3r 15VS164   568  C~2lVY      
2015 11  06.46851  03 25 34.100  +16 59 09.21  24.1r 15VS164   568  C~2lVY      
2015 11  17.45383  03 24 30.519  +16 53 59.29  24.2w 15VS164   568  C~2lVY      
2015 11  17.54213  03 24 29.991  +16 53 56.75  23.8w 15VS164   568  C~2lVY      
2015 12  06.32006  03 22 43.896  +16 45 28.73  24.2w 15VS164   568  C~2lVY      
2015 12  06.45375  03 22 43.174  +16 45 25.47  24.1w 15VS164   568  C~2lVY      
2015 12  31.34139  03 20 49.539  +16 36 17.79  23.7w 15VS164   568  C~2lVY      
2016 01  07.37071  03 20 26.623  +16 34 22.15  24.5w 15VS164   568  C~2lVY      
2016 01  08.23304  03 20 24.165  +16 34 09.43  24.3w 15VS164   568  C~2lVY      
2016 02  11.27002  03 19 52.943  +16 30 13.15  24.3w 15VS164   568  C~2lVY      
2016 09  25.61718  03 36 26.744  +17 03 16.51  24.4w 15VS164   568  C~2lVY      
2016 10  10.55675  03 35 32.235  +16 57 45.80  24.1w 15VS164   568  C~2lVY      
2016 10  10.60523  03 35 32.016  +16 57 44.62  24.2w 15VS164   568  C~2lVY      
2016 10  28.47637  03 34 04.547  +16 50 05.09  24.4w 15VS164   568  C~2lVY      
2016 10  29.53828  03 33 58.785  +16 49 36.39  24.2w 15VS164   568  C~2lVY      
2016 10  29.55586  03 33 58.683  +16 49 35.86  24.4w 15VS164   568  C~2lVY      
2016 11  02.59127  03 33 36.356  +16 47 45.87  24.5w 15VS164   568  C~2lVY      
2017 01  27.33320  03 27 22.980  +16 18 52.74  24.4w 15VS164   568  C~2lVY      
2020 11  14.386760 04 03 45.772  +15 39 35.90  24.1G 15VS164   G37  C~4O28      
2020 11  14.447570 04 03 45.432  +15 39 34.65        15VS164   G37  C~4O28      

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     0.05       0.00     0.10
     2   0.0494      0.00     0.02       0.00     0.05
     3   0.0627      0.00    -0.09       0.00     0.06
     4   0.1313      0.00    -0.08       0.00     0.02
     5   0.1314      0.00    -0.03       0.00     0.06
     6   0.1369      0.00     0.01       0.00     0.01
     7   0.2129      0.00     0.06       0.00    -0.02
     8   0.2131      0.00     0.07       0.00     0.15
     9   0.2133      0.00     0.09       0.00    -0.02
    10   0.2133      0.00    -0.02       0.00    -0.04
    11   0.2434      0.00     0.00       0.00     0.05
    12   0.2436      0.00    -0.09       0.00     0.01
    13   0.2950      0.00     0.01       0.00    -0.02
    14   0.2954      0.00     0.12       0.00     0.14
    15   0.3635      0.00     0.02       0.00     0.13
    16   0.3828      0.00    -0.04       0.00    -0.08
    17   0.3852      0.00    -0.00       0.00    -0.04
    18   0.4783      0.00     0.04       0.00     0.04
    19   1.1008      0.00     0.05       0.00    -0.07
    20   1.1417      0.00     0.04       0.00    -0.03
    21   1.1418      0.00    -0.05       0.00    -0.03
    22   1.1907      0.00    -0.04       0.00    -0.12
    23   1.1937      0.00     0.07       0.00    -0.09
    24   1.1937      0.00     0.00       0.00    -0.14
    25   1.2048      0.00    -0.05       0.00    -0.10
    26   1.4395      0.00    -0.06       0.00    -0.14
    27   5.2370      0.00    -0.14       0.00    -0.06
    28   5.2372      0.00     0.17       0.00     0.21

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.

15VS164    quality flag:3

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

axisobj        39.693    39.693    39.693
ecceobj         0.157     0.157     0.157
incobj         20.660    20.660    20.660
qmin           31.930    31.931    31.929
qmax           47.511    47.507    47.514
amean          39.455    39.455    39.455
amin           39.068    39.067    39.068
amax           39.887    39.889    39.885
emean           0.161     0.161     0.161
emin            0.124     0.124     0.124
emax            0.193     0.193     0.193
imean          21.453    21.453    21.453
imin           20.744    20.743    20.744
imax           22.220    22.220    22.220
excite_mean     0.400     0.400     0.400
fracstop        1.000     1.000     1.000
cjmean          2.866     2.866     2.866

libcent 0       181.3     181.4     181.2
libamp  0        79.5      79.3      79.6
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       175.9     175.9     175.9
kozaiamp        180.0     180.0     180.0