Orbit Fit and Astrometric record for 15VE164

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: 15VE164   
# Created Sat Dec  4 02:13:36 2021
# Orbit generated from Bernstein formalism
# Fitting     22 observations of     22
# Arc:   1.37y
# First observation: 2015/08/11
#  Last observation: 2016/12/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000202   0.099717  -0.000267  -0.073824   0.066495   0.000000
# Chi-squared of fit:     5.93 DOF:     38 RMS:  0.09
# Min/Max residuals:    -0.22    0.20
# Exact a, adot, b, bdot, g, gdot:
  2.444232E-05  9.496360E-02 -1.804576E-05 -7.114388E-02  6.323608E-02  1.957909E-02
# Covariance matrix:
  2.9415E-13  2.8400E-13  6.6356E-14 -4.0777E-13  4.2065E-13  4.2538E-12
  2.8400E-13  6.2896E-12  1.0434E-12 -6.7019E-12  2.9591E-12  6.7310E-11
  6.6356E-14  1.0434E-12  3.1514E-13 -1.2928E-12  5.0101E-13  1.1631E-11
 -4.0777E-13 -6.7019E-12 -1.2928E-12  7.6933E-12 -3.1875E-12 -7.4766E-11
  4.2065E-13  2.9591E-12  5.0101E-13 -3.1875E-12  1.8061E-12  3.2276E-11
  4.2538E-12  6.7310E-11  1.1631E-11 -7.4766E-11  3.2276E-11  7.5042E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.074998   50.891283    1.015029    0.000177    0.041943  2457246.073039
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:            6.81516 +/-     0.011
Argument of Peri:      159.73438 +/-     0.036
Long of Asc Node:      227.11615 +/-     0.000
Inclination:            36.55781 +/-     0.000
Eccentricity:         0.45697603 +/-    0.0002
Semi-Major Axis:     28.52738486 +/-    0.0058
Time of Perihelion: 2456186.9260 +/-       1.7
Perihelion:          15.49105390 +/-    0.0054
Aphelion:            41.56371582 +/-    0.0096
Period (y)              152.3706 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           10.73254610 +/-    0.0002
Ecliptic Y           11.59764432 +/-    0.0003
Ecliptic Z           -0.02095199 +/-    0.0000
Ecliptic XDOT        -0.00266022 +/-    0.0000
Ecliptic YDOT         0.00324181 +/-    0.0000
Ecliptic ZDOT        -0.00308127 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   15.80168784 +/-    0.0002
Geocenter to KBO     15.81375722 +/-    0.0003
# Hcoef: 11.85

The following table shows the complete astrometric record for 15VE164. 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 (15VE164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.57225  03 13 54.815  +17 54 21.14  24.3w 15VE164   568  C~2jiD      
2015 09  06.61892  03 14 37.458  +17 38 26.21  24.2w 15VE164   568  C~2jiD      
2015 09  12.50905  03 14 23.753  +17 33 11.46  24.2w 15VE164   568  C~2jiD      
2015 10  07.43992  03 11 59.002  +17 04 56.22  24.0w 15VE164   568  C~2jiD      
2015 10  07.44703  03 11 58.934  +17 04 55.60  23.9w 15VE164   568  C~2jiD      
2015 10  08.45165  03 11 50.507  +17 03 36.41  24.2w 15VE164   568  C~2jiD      
2015 10  08.51072  03 11 50.013  +17 03 31.84  24.1w 15VE164   568  C~2jiD      
2015 11  06.29151  03 06 54.419  +16 21 57.76  23.9r 15VE164   568  C~2jiD      
2015 11  06.35485  03 06 53.684  +16 21 51.99  23.5r 15VE164   568  C~2jiD      
2015 11  06.42547  03 06 52.882  +16 21 45.80  23.7r 15VE164   568  C~2jiD      
2015 11  06.49480  03 06 52.074  +16 21 39.29  23.8r 15VE164   568  C~2jiD      
2015 11  07.51356  03 06 40.443  +16 20 06.30  23.9w 15VE164   568  C~2jiD      
2015 11  17.27960  03 04 48.866  +16 05 17.35  23.8w 15VE164   568  C~2jiD      
2015 11  17.32888  03 04 48.298  +16 05 12.96  24.0w 15VE164   568  C~2jiD      
2016 09  25.61312  03 40 08.581  +14 40 00.66  24.1w 15VE164   568  C~2jiD      
2016 10  10.55232  03 38 32.915  +14 20 45.28  24.2w 15VE164   568  C~2jiD      
2016 10  10.60084  03 38 32.514  +14 20 41.32  24.1w 15VE164   568  C~2jiD      
2016 10  28.48801  03 35 47.139  +13 55 40.70  24.1w 15VE164   568  C~2jiD      
2016 10  29.52657  03 35 36.253  +13 54 11.66  24.2w 15VE164   568  C~2jiD      
2016 10  29.55008  03 35 36.004  +13 54 09.60  24.1w 15VE164   568  C~2jiD      
2016 11  02.57961  03 34 52.878  +13 48 24.16  24.2w 15VE164   568  C~2jiD      
2016 12  24.34024  03 25 52.375  +12 44 05.59        15VE164   568  C~2jiD      

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    -0.14       0.00     0.05
     2   0.0713    336.27    -0.09   -1081.60     0.13
     3   0.0874     64.45    -0.03   -1333.76    -0.07
     4   0.1557  -2383.31     0.17   -2420.28     0.01
     5   0.1557  -2384.41     0.04   -2420.62    -0.02
     6   0.1585  -2522.00    -0.10   -2464.80    -0.02
     7   0.1586  -2530.05     0.20   -2467.32    -0.00
     8   0.2374  -7295.18    -0.13   -3726.88     0.03
     9   0.2376  -7306.95    -0.17   -3729.56    -0.00
    10   0.2378  -7319.76     0.16   -3732.37     0.14
    11   0.2380  -7332.74     0.09   -3735.48    -0.03
    12   0.2408  -7519.44     0.00   -3779.43    -0.13
    13   0.2675  -9312.00    -0.01   -4195.66    -0.07
    14   0.2676  -9321.10     0.01   -4197.64    -0.04
    15   1.1254  19159.68     0.04  -16992.90     0.03
    16   1.1663  17523.38     0.17  -17794.44    -0.03
    17   1.1664  17516.72     0.04  -17796.93    -0.01
    18   1.2154  14800.57     0.08  -18686.29     0.09
    19   1.2182  14623.96    -0.09  -18734.93     0.05
    20   1.2183  14619.91    -0.05  -18736.06    -0.00
    21   1.2293  13921.88    -0.22  -18921.17    -0.06
    22   1.3710   5270.75     0.03  -20728.78    -0.05

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.

15VE164    quality flag:3

Type:       CENTAURR  CENTAURR  CENTAURR

axisobj        28.696    28.797    28.596
ecceobj         0.460     0.462     0.458
incobj         36.536    36.535    36.537
qmin           15.027    14.976    15.111
qmax           42.479    43.269    42.554
amean          28.531    28.984    30.079
amin           28.007    28.509    28.177
amax           28.878    30.835    31.273
emean           0.450     0.445     0.300
emin            0.385     0.389     0.083
emax            0.474     0.479     0.469
imean          37.484    37.976    41.483
imin           36.545    36.457    36.691
imax           39.999    40.554    44.880
excite_mean     0.757     0.760     0.737
fracstop        0.058     0.075     0.215
cjmean          2.446     2.434     2.426

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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       193.6     200.5     185.1
kozaiamp         28.0      36.3      67.2