Orbit Fit and Astrometric record for 15VX164

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: 15VX164   
# Created Tue Sep 27 01:18:01 2022
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     32 observations of     32
# Arc:   6.21y
# First observation: 2015/08/20
#  Last observation: 2021/11/05
# Chi-squared of fit:     8.14 DOF:     58 RMS:  0.09
# Min/Max residuals:    -0.14    0.33
# Exact a, adot, b, bdot, g, gdot:
  2.165735E-05  5.153855E-02 -6.317150E-06 -1.562586E-02  3.812295E-02  1.441263E-03
# Covariance matrix:
  2.1067E-13 -1.1805E-13 -1.3197E-14  3.3995E-14  1.0938E-13 -3.0590E-13
 -1.1805E-13  2.9581E-13  3.9066E-14 -9.4559E-14  2.8999E-14  8.9908E-13
 -1.3197E-14  3.9066E-14  6.4963E-14 -2.8061E-14  5.1601E-15  1.2475E-13
  3.3995E-14 -9.4559E-14 -2.8061E-14  4.5463E-14 -1.0320E-14 -3.0153E-13
  1.0938E-13  2.8999E-14  5.1601E-15 -1.0320E-14  1.2986E-13  1.1646E-13
 -3.0590E-13  8.9908E-13  1.2475E-13 -3.0153E-13  1.1646E-13  2.8705E-12
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.243312   53.186001    1.012164   -0.000165   -0.070192  2457255.068249
# Heliocentric elements and errors
Epoch:              2457254.5000  =  2015/08/20
Mean Anomaly:          358.72793 +/-     0.003
Argument of Peri:      183.50577 +/-     0.007
Long of Asc Node:      230.18851 +/-     0.000
Inclination:            16.88250 +/-     0.000
Eccentricity:         0.32998214 +/-    0.0000
Semi-Major Axis:     39.26886755 +/-    0.0029
Time of Perihelion: 2457572.0991 +/-      10.0
Perihelion:          26.31084243 +/-    0.0026
Aphelion:            52.22689266 +/-    0.0042
Period (y)              246.0825 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.56631926 +/-    0.0002
Ecliptic Y           20.44940135 +/-    0.0002
Ecliptic Z           -0.11153525 +/-    0.0000
Ecliptic XDOT        -0.00290604 +/-    0.0000
Ecliptic YDOT         0.00229058 +/-    0.0000
Ecliptic ZDOT        -0.00112257 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   26.31793579 +/-    0.0002
Geocenter to KBO     26.23092955 +/-    0.0002
# Hcoef: 10.04

The following table shows the complete astrometric record for 15VX164. 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 (15VX164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.56746  03 23 25.699  +18 20 02.31  24.7w 15VX164   568  C~2lVY      
2015 09  07.61267  03 23 26.692  +18 17 09.40  24.3w 15VX164   568  C~2lVY      
2015 09  12.46374  03 23 18.664  +18 15 51.56  24.9w 15VX164   568  C~2lVY      
2015 10  07.52101  03 21 45.863  +18 05 57.64  24.5w 15VX164   568  C~2lVY      
2015 10  07.58040  03 21 45.546  +18 05 55.91  24.7w 15VX164   568  C~2lVY      
2015 10  09.56029  03 21 34.981  +18 04 56.74  24.7w 15VX164   568  C~2lVY      
2015 11  06.33360  03 18 33.649  +17 49 00.26  24.2r 15VX164   568  C~2lVY      
2015 11  06.39716  03 18 33.180  +17 48 58.07  23.9r 15VX164   568  C~2lVY      
2015 11  06.40423  03 18 33.116  +17 48 57.68  24.0r 15VX164   568  C~2lVY      
2015 11  06.47375  03 18 32.612  +17 48 55.08  24.2r 15VX164   568  C~2lVY      
2015 11  07.49015  03 18 25.226  +17 48 17.20  23.3w 15VX164   568  C~2lVY      
2015 11  17.47136  03 17 11.801  +17 42 01.81  24.2w 15VX164   568  C~2lVY      
2015 11  17.55969  03 17 11.146  +17 41 58.32  24.6w 15VX164   568  C~2lVY      
2015 12  06.35508  03 14 58.238  +17 30 32.71  24.4w 15VX164   568  C~2lVY      
2015 12  06.49265  03 14 57.320  +17 30 27.95  24.4w 15VX164   568  C~2lVY      
2016 01  01.34294  03 12 37.228  +17 17 37.77  24.5w 15VX164   568  C~2lVY      
2016 01  07.41130  03 12 15.591  +17 15 22.72  24.8w 15VX164   568  C~2lVY      
2016 01  07.42868  03 12 15.512  +17 15 22.76  24.7w 15VX164   568  C~2lVY      
2016 01  08.25624  03 12 12.983  +17 15 05.90  24.7w 15VX164   568  C~2lVY      
2016 02  05.28768  03 11 47.299  +17 09 46.08  24.5w 15VX164   568  C~2lVY      
2016 02  10.30807  03 11 55.720  +17 09 41.56  24.7w 15VX164   568  C~2lVY      
2016 09  25.62123  03 35 51.368  +18 01 49.96  24.8w 15VX164   568  C~2lVY      
2016 10  10.56080  03 34 44.648  +17 55 08.37  24.6w 15VX164   568  C~2lVY      
2016 10  10.60927  03 34 44.386  +17 55 06.88  24.6w 15VX164   568  C~2lVY      
2016 10  28.47058  03 32 54.597  +17 45 29.91  24.7w 15VX164   568  C~2lVY      
2016 10  28.49380  03 32 54.446  +17 45 29.16  24.6w 15VX164   568  C~2lVY      
2016 10  29.53251  03 32 47.310  +17 44 53.30  24.5w 15VX164   568  C~2lVY      
2016 11  02.58549  03 32 18.921  +17 42 31.90  24.1w 15VX164   568  C~2lVY      
2017 01  27.32464  03 24 40.928  +17 04 07.67  23.7w 15VX164   568  C~2lVY      
2021 11  05.405020 04 37 47.308  +16 11 26.32  24.2G 15VX164   G37  C~5Baf      
2021 11  05.446470 04 37 47.038  +16 11 25.26        15VX164   G37  C~5Baf      
2021 11  05.488110 04 37 46.769  +16 11 24.05        15VX164   G37  C~5Baf      

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    -0.05
     2   0.0494      0.00    -0.14       0.00     0.03
     3   0.0627      0.00     0.16       0.00     0.01
     4   0.1313      0.00    -0.08       0.00    -0.01
     5   0.1315      0.00    -0.05       0.00     0.02
     6   0.1369      0.00    -0.05       0.00    -0.01
     7   0.2129      0.00     0.02       0.00    -0.07
     8   0.2131      0.00     0.04       0.00     0.09
     9   0.2131      0.00    -0.14       0.00    -0.04
    10   0.2133      0.00     0.03       0.00    -0.05
    11   0.2161      0.00     0.33       0.00     0.02
    12   0.2434      0.00    -0.08       0.00     0.03
    13   0.2436      0.00    -0.01       0.00    -0.10
    14   0.2951      0.00    -0.05       0.00    -0.00
    15   0.2955      0.00     0.09       0.00     0.03
    16   0.3663      0.00    -0.09       0.00    -0.03
    17   0.3829      0.00     0.22       0.00    -0.14
    18   0.3829      0.00    -0.13       0.00     0.27
    19   0.3852      0.00    -0.00       0.00     0.15
    20   0.4619      0.00    -0.03       0.00     0.00
    21   0.4757      0.00     0.07       0.00    -0.07
    22   1.1008      0.00     0.12       0.00    -0.01
    23   1.1417      0.00    -0.01       0.00     0.01
    24   1.1418      0.00     0.03       0.00    -0.03
    25   1.1907      0.00    -0.07       0.00    -0.06
    26   1.1908      0.00     0.09       0.00    -0.01
    27   1.1936      0.00     0.07       0.00    -0.03
    28   1.2047      0.00    -0.03       0.00     0.05
    29   1.4394      0.00    -0.12       0.00     0.03
    30   6.2117      0.00    -0.01       0.00    -0.06
    31   6.2119      0.00    -0.01       0.00     0.05
    32   6.2120      0.00     0.02       0.00     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.

15VX164    quality flag:3

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

axisobj        39.711    39.710    39.711
ecceobj         0.337     0.337     0.337
incobj         16.840    16.840    16.840
qmin           25.289    25.268    25.307
qmax           54.278    54.257    54.380
amean          39.454    39.454    39.454
amin           38.965    38.980    38.973
amax           40.053    40.072    40.046
emean           0.337     0.338     0.337
emin            0.320     0.321     0.320
emax            0.356     0.357     0.358
imean          17.231    17.210    17.218
imin           16.424    16.325    16.392
imax           18.000    18.010    18.031
excite_mean     0.449     0.449     0.449
fracstop        1.000     1.000     1.000
cjmean          2.821     2.821     2.821

libcent 0       180.0     180.7     180.6
libamp  0        88.8      85.6      85.6
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       179.4     179.2     179.2
kozaiamp        180.0     180.0     179.9