Orbit Fit and Astrometric record for 15VZ164

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: 15VZ164   
# Created Sat Dec  4 02:13:37 2021
# Orbit generated from Bernstein formalism
# Fitting     26 observations of     26
# Arc:   1.95y
# First observation: 2015/10/09
#  Last observation: 2017/09/20
Preliminary a, adot, b, bdot, g, gdot:
  -0.000112   0.030836   0.000000  -0.000854   0.028330   0.000000
# Chi-squared of fit:     5.60 DOF:     46 RMS:  0.08
# Min/Max residuals:    -0.29    0.27
# Exact a, adot, b, bdot, g, gdot:
  1.716535E-05  3.063271E-02 -5.047764E-07 -8.505593E-04  2.847549E-02 -5.740477E-03
# Covariance matrix:
  2.5412E-13 -1.0853E-13  3.7523E-16 -2.0746E-15  1.8470E-13  1.2221E-12
 -1.0853E-13  5.7926E-13  2.4582E-15 -1.3139E-14  1.4986E-13  9.2220E-12
  3.7523E-16  2.4582E-15  1.1192E-13 -9.6479E-14  1.4906E-15  5.9718E-14
 -2.0746E-15 -1.3139E-14 -9.6479E-14  1.6759E-13 -8.0592E-15 -3.1992E-13
  1.8470E-13  1.4986E-13  1.4906E-15 -8.0592E-15  3.0660E-13  5.3446E-12
  1.2221E-12  9.2220E-12  5.9718E-14 -3.1992E-13  5.3446E-12  2.2208E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.723034   53.306679    0.611700   -0.009853   -0.794428  2457305.061079
# Heliocentric elements and errors
Epoch:              2457300.5000  =  2015/10/05
Mean Anomaly:          305.47212 +/-     0.022
Argument of Peri:      282.07892 +/-     0.037
Long of Asc Node:      208.59023 +/-     0.010
Inclination:             1.75542 +/-     0.001
Eccentricity:         0.22106936 +/-    0.0005
Semi-Major Axis:     39.44945781 +/-    0.0095
Time of Perihelion: 2471008.5634 +/-       2.6
Perihelion:          30.72839140 +/-    0.0210
Aphelion:            48.17052423 +/-    0.0228
Period (y)              247.7820 +/-      0.09
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           21.94350536 +/-    0.0004
Ecliptic Y           28.42796246 +/-    0.0005
Ecliptic Z           -0.44318474 +/-    0.0000
Ecliptic XDOT        -0.00269368 +/-    0.0000
Ecliptic YDOT         0.00130999 +/-    0.0000
Ecliptic ZDOT        -0.00007476 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   35.91466121 +/-    0.0005
Geocenter to KBO     35.11791832 +/-    0.0007
# Hcoef:  8.50

The following table shows the complete astrometric record for 15VZ164. 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 (15VZ164) followed by the observatory code and reference code for the source of the astrometry.

2015 10  09.56029  03 24 25.538  +17 53 59.14  24.2w 15VZ164   568  C~2lVZ      
2015 11  06.33360  03 22 03.343  +17 44 43.77  24.1r 15VZ164   568  C~2lVZ      
2015 11  06.39716  03 22 02.959  +17 44 42.41  23.8r 15VZ164   568  C~2lVZ      
2015 11  06.40423  03 22 02.927  +17 44 42.22  24.0r 15VZ164   568  C~2lVZ      
2015 11  06.47375  03 22 02.523  +17 44 40.74  24.0r 15VZ164   568  C~2lVZ      
2015 11  07.49015  03 21 56.740  +17 44 18.41  24.1w 15VZ164   568  C~2lVZ      
2015 11  17.47136  03 20 59.300  +17 40 37.59  24.0w 15VZ164   568  C~2lVZ      
2015 11  17.55969  03 20 58.783  +17 40 35.72  24.2w 15VZ164   568  C~2lVZ      
2015 12  06.33759  03 19 13.846  +17 33 55.04  24.2w 15VZ164   568  C~2lVZ      
2015 12  06.47504  03 19 13.104  +17 33 52.14  24.6w 15VZ164   568  C~2lVZ      
2015 12  31.35875  03 17 21.399  +17 26 52.29  24.3w 15VZ164   568  C~2lVZ      
2016 01  07.38812  03 16 58.980  +17 25 30.20  24.4w 15VZ164   568  C~2lVZ      
2016 01  07.42286  03 16 58.917  +17 25 29.56  24.6w 15VZ164   568  C~2lVZ      
2016 01  08.24465  03 16 56.624  +17 25 21.36  24.4w 15VZ164   568  C~2lVZ      
2016 02  04.37827  03 16 22.169  +17 23 28.34  24.2w 15VZ164   568  C~2lVZ      
2016 02  11.24103  03 16 26.919  +17 23 52.33  24.3w 15VZ164   568  C~2lVZ      
2016 09  07.61412  03 33 07.106  +18 22 57.41  24.4w 15VZ164   568  C~2lVZ      
2016 09  27.53935  03 32 22.464  +18 19 48.17  24.4w 15VZ164   568  C~2lVZ      
2016 10  09.53365  03 31 37.135  +18 16 51.66  23.5w 15VZ164   568  C~2lVZ      
2016 10  09.60571  03 31 36.817  +18 16 50.39  24.5w 15VZ164   568  C~2lVZ      
2016 11  02.47946  03 29 36.561  +18 09 17.89  24.2w 15VZ164   568  C~2lVZ      
2016 11  04.45547  03 29 25.413  +18 08 36.47  24.2w 15VZ164   568  C~2lVZ      
2016 12  24.34518  03 24 55.507  +17 52 11.12  24.2w 15VZ164   568  C~2lVZ      
2017 01  27.31949  03 23 26.765  +17 47 07.12  24.2w 15VZ164   568  C~2lVZ      
2017 09  15.55809  03 40 12.936  +18 43 56.66  24.2w 15VZ164   568  C~2lVZ      
2017 09  20.60688  03 40 02.273  +18 43 12.34  24.4w 15VZ164   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    -0.03       0.00     0.01
     2   0.0760  -2105.04     0.13     -27.25    -0.05
     3   0.0762  -2110.69    -0.11     -27.18     0.03
     4   0.0762  -2111.18     0.01     -27.25    -0.04
     5   0.0764  -2117.14    -0.01     -27.22     0.01
     6   0.0792  -2202.73     0.04     -27.93    -0.02
     7   0.1065  -3052.81     0.06     -33.38    -0.00
     8   0.1068  -3060.44     0.09     -33.31     0.10
     9   0.1582  -4613.76     0.02     -37.66    -0.01
    10   0.1586  -4624.77    -0.05     -37.74    -0.13
    11   0.2267  -6278.12    -0.05     -31.70     0.05
    12   0.2459  -6609.59    -0.29     -27.86     0.27
    13   0.2460  -6610.63     0.17     -28.25    -0.13
    14   0.2483  -6644.49     0.06     -27.66     0.03
    15   0.3226  -7150.64    -0.08      -8.71    -0.10
    16   0.3414  -7078.66     0.06      -3.22    -0.02
    17   0.9146   7637.47    -0.01    -128.99     0.03
    18   0.9691   6974.27    -0.06    -160.99    -0.03
    19   1.0020   6304.56     0.01    -177.53     0.06
    20   1.0022   6299.85    -0.04    -177.68    -0.00
    21   1.0675   4526.63    -0.01    -202.68    -0.01
    22   1.0730   4362.35    -0.02    -204.23    -0.05
    23   1.2095    387.34     0.13    -211.32    -0.02
    24   1.3026   -915.64    -0.04    -188.75     0.05
    25   1.9357  13836.62    -0.01    -319.24    -0.02
    26   1.9495  13678.32     0.03    -327.73    -0.00

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.

15VZ164    quality flag:3

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

axisobj        39.770    39.790    39.750
ecceobj         0.219     0.220     0.218
incobj          1.746     1.746     1.746
qmin           30.263    30.211    30.292
qmax           49.171    49.066    49.123
amean          39.455    39.455    39.456
amin           39.060    39.061    39.071
amax           39.893    39.903    39.907
emean           0.215     0.216     0.214
emin            0.199     0.198     0.198
emax            0.233     0.232     0.232
imean           2.792     2.821     2.806
imin            2.372     2.353     2.372
imax            3.570     3.720     3.469
excite_mean     0.221     0.221     0.220
fracstop        1.000     1.000     1.000
cjmean          2.996     2.996     2.996

libcent 0       179.9     180.6     180.0
libamp  0        50.6      56.5      48.6
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       169.3     171.3     168.1
kozaiamp        179.9     180.0     180.0