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 Apr 23 01:10:47 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   29
# Arc:   1.44y
# First observation: 2015/08/20
#  Last observation: 2017/01/27
Preliminary a, adot, b, bdot, g, gdot:
  -0.000268   0.053087  -0.000001  -0.016032   0.038828   0.000000
# Chi-squared of fit:     7.14 DOF:   52 RMS:  0.09
# Min/Max residuals:    -0.20    0.30
# Exact a, adot, b, bdot, g, gdot:
  2.153716E-05  5.153751E-02 -6.402228E-06 -1.562537E-02  3.812241E-02  1.419256E-03
# Covariance matrix:
  2.7697E-13  3.0760E-13  4.0867E-14 -2.1823E-13  3.5651E-13  9.9082E-12
  3.0760E-13  3.3186E-12  2.9293E-13 -1.5856E-12  1.7429E-12  7.1563E-11
  4.0867E-14  2.9293E-13  1.3898E-13 -2.7489E-13  1.6579E-13  6.8180E-12
 -2.1823E-13 -1.5856E-12 -2.7489E-13  1.0616E-12 -8.9424E-13 -3.6909E-11
  3.5651E-13  1.7429E-12  1.6579E-13 -8.9424E-13  1.1069E-12  4.0423E-11
  9.9082E-12  7.1563E-11  6.8180E-12 -3.6909E-11  4.0423E-11  1.6657E-09
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.243312   53.186001    1.012164   -0.000165   -0.070193  2457255.068249
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:          358.66700 +/-     0.083
Argument of Peri:      183.60005 +/-     0.175
Long of Asc Node:      230.18852 +/-     0.000
Inclination:            16.88258 +/-     0.001
Eccentricity:         0.32996790 +/-    0.0000
Semi-Major Axis:     39.26782163 +/-    0.0032
Time of Perihelion: 2457583.2975 +/-      20.8
Perihelion:          26.31070098 +/-    0.0028
Aphelion:            52.22494228 +/-    0.0047
Period (y)              246.0727 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           16.56654215 +/-    0.0004
Ecliptic Y           20.44969390 +/-    0.0006
Ecliptic Z           -0.11153905 +/-    0.0000
Ecliptic XDOT        -0.00290697 +/-    0.0000
Ecliptic YDOT         0.00228930 +/-    0.0000
Ecliptic ZDOT        -0.00112254 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   26.31829669 +/-    0.0005
Geocenter to KBO     26.23128913 +/-    0.0007
# Hcoef: 10.16

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      

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    -0.02
  2   0.0494    -29.73    -0.09    -170.92     0.08
  3   0.0627   -159.96     0.18    -217.55    -0.02
  4   0.1313  -1589.56    -0.07    -458.62     0.02
  5   0.1315  -1594.37    -0.03    -459.15     0.03
  6   0.1369  -1755.10    -0.04    -478.21     0.01
  7   0.2129  -4501.88    -0.01    -741.88    -0.08
  8   0.2131  -4508.92     0.05    -742.28     0.07
  9   0.2131  -4509.91    -0.14    -742.42    -0.01
 10   0.2133  -4517.53     0.01    -743.08    -0.06
 11   0.2161  -4629.27     0.30    -752.52    -0.06
 12   0.2434  -5740.29    -0.08    -844.15     0.05
 13   0.2436  -5750.25    -0.05    -845.09    -0.10
 14   0.2951  -7765.73    -0.06   -1011.91     0.00
 15   0.2955  -7779.67     0.07   -1013.06     0.01
 16   0.3663  -9920.99    -0.11   -1227.94    -0.01
 17   0.3829 -10256.44     0.14   -1276.05    -0.20
 18   0.3829 -10257.52    -0.06   -1275.71     0.28
 19   0.3852 -10297.02     0.02   -1282.36     0.14
 20   0.4619 -10738.00    -0.02   -1493.22    -0.00
 21   0.4757 -10622.55     0.05   -1529.70    -0.10
 22   1.1008  10051.91     0.07   -3643.80    -0.04
 23   1.1417   9029.88    -0.04   -3809.78     0.02
 24   1.1418   9025.89    -0.01   -3810.34    -0.03
 25   1.1907   7363.21    -0.10   -3998.17    -0.04
 26   1.1908   7360.93     0.07   -3998.39    -0.03
 27   1.1936   7253.22     0.05   -4008.84    -0.04
 28   1.2047   6825.00    -0.03   -4049.03     0.06
 29   1.4394    -99.21    -0.02   -4679.53     0.08

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        39.708    39.779    39.638
ecceobj         0.337     0.338     0.335
incobj         16.840    16.840    16.840
qmin           25.345    25.124    25.824
qmax           54.207    54.373    53.890
amean          39.454    39.454    39.454
amin           38.966    39.021    38.879
amax           40.093    40.006    40.138
emean           0.337     0.340     0.329
emin            0.320     0.322     0.314
emax            0.356     0.362     0.345
imean          17.276    16.985    18.010
imin           16.515    15.952    17.541
imax           17.989    18.040    18.623
excite_mean     0.449     0.448     0.452
fracstop        1.000     1.000     1.000
cjmean          2.821     2.821     2.819

libcent 0       179.6     180.0     180.5
libamp  0        89.8      59.5     129.8
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       179.1     188.7     182.9
kozaiamp        180.0     180.0     179.9