Orbit Fit and Astrometric record for 15VB164

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: 15VB164   
# Created Mon Apr 22 01:10:11 2019
# Orbit generated from Bernstein formalism
# Fitting   37 observations of   37
# Arc:   2.32y
# First observation: 2015/08/20
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000104   0.022071  -0.000009  -0.010083   0.024123   0.000000
# Chi-squared of fit:     6.35 DOF:   68 RMS:  0.07
# Min/Max residuals:    -0.20    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.533696E-05  2.172110E-02 -6.951947E-06 -9.940104E-03  2.388500E-02  1.603206E-03
# Covariance matrix:
  1.8137E-13 -6.1898E-14  8.9564E-15 -2.4159E-14  1.1013E-13  1.2919E-12
 -6.1898E-14  2.9028E-13  4.4344E-14 -1.5874E-13  1.3570E-13  8.2332E-12
  8.9564E-15  4.4344E-14  1.1323E-13 -1.2473E-13  3.7903E-14  2.0728E-12
 -2.4159E-14 -1.5874E-13 -1.2473E-13  2.5589E-13 -1.2611E-13 -7.3964E-12
  1.1013E-13  1.3570E-13  3.7903E-14 -1.2611E-13  2.1616E-13  6.5879E-12
  1.2919E-12  8.2332E-12  2.0728E-12 -7.3964E-12  6.5879E-12  3.8375E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.995391   54.145242    1.013212   -0.001715   -0.053013  2457255.056669
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:           30.70488 +/-     0.411
Argument of Peri:      149.06969 +/-     0.501
Long of Asc Node:      228.42650 +/-     0.000
Inclination:            24.70427 +/-     0.001
Eccentricity:         0.07810835 +/-    0.0005
Semi-Major Axis:     44.86321209 +/-    0.0058
Time of Perihelion: 2447889.1412 +/-     125.4
Perihelion:          41.35902067 +/-    0.0250
Aphelion:            48.36740350 +/-    0.0252
Period (y)              300.4995 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.35637492 +/-    0.0005
Ecliptic Y           33.36241104 +/-    0.0007
Ecliptic Z           -1.45804879 +/-    0.0000
Ecliptic XDOT        -0.00193566 +/-    0.0000
Ecliptic YDOT         0.00156869 +/-    0.0000
Ecliptic ZDOT        -0.00114505 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.92996692 +/-    0.0006
Geocenter to KBO     41.86728577 +/-    0.0008
# Hcoef:  7.87

The following table shows the complete astrometric record for 15VB164. 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 (15VB164) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.55588  03 29 08.773  +16 52 24.41  24.3w 15VB164   568  C~2fCN      
2015 09  07.60452  03 29 04.505  +16 49 30.54  24.2w 15VB164   568  C~2fCN      
2015 09  12.45550  03 28 58.145  +16 48 25.40  24.1w 15VB164   568  C~2fCN      
2015 10  07.50351  03 27 53.395  +16 41 01.71  24.5w 15VB164   568  C~2fCN      
2015 10  07.56195  03 27 53.185  +16 41 00.50  23.9w 15VB164   568  C~2fCN      
2015 10  09.54866  03 27 46.020  +16 40 18.74  24.0w 15VB164   568  C~2fCN      
2015 11  06.32308  03 25 44.629  +16 29 34.11  23.7r 15VB164   568  C~2fCN      
2015 11  06.38643  03 25 44.324  +16 29 32.75  24.3r 15VB164   568  C~2fCN      
2015 11  06.45719  03 25 43.968  +16 29 30.96  23.7r 15VB164   568  C~2fCN      
2015 11  07.47849  03 25 38.983  +16 29 05.95  24.0w 15VB164   568  C~2fCN      
2015 11  17.45967  03 24 49.745  +16 25 03.12  23.9w 15VB164   568  C~2fCN      
2015 11  17.54796  03 24 49.297  +16 25 00.89  24.2w 15VB164   568  C~2fCN      
2015 12  06.32589  03 23 18.880  +16 17 46.37  24.5w 15VB164   568  C~2fCN      
2015 12  06.45961  03 23 18.251  +16 17 43.17  23.7w 15VB164   568  C~2fCN      
2015 12  31.34718  03 21 40.681  +16 09 58.13  24.1w 15VB164   568  C~2fCN      
2016 01  07.37652  03 21 20.697  +16 08 20.32  24.3w 15VB164   568  C~2fCN      
2016 01  08.23883  03 21 18.534  +16 08 09.55  24.5w 15VB164   568  C~2fCN      
2016 02  05.32968  03 20 45.284  +16 04 50.28  24.1w 15VB164   568  C~2fCN      
2016 02  11.27580  03 20 48.127  +16 04 47.22  24.7w 15VB164   568  C~2fCN      
2016 09  07.60834  03 34 42.245  +16 33 59.80        15VB164   568  C~2fCN      
2016 09  25.61718  03 34 09.069  +16 29 16.39  24.1w 15VB164   568  C~2fCN      
2016 09  27.53529  03 34 03.919  +16 28 41.14  24.7w 15VB164   568  C~2fCN      
2016 10  07.52743  03 33 32.492  +16 25 23.45  24.0w 15VB164   568  C~2fCN      
2016 10  07.53507  03 33 32.447  +16 25 23.22  23.8w 15VB164   568  C~2fCN      
2016 10  07.62286  03 33 32.129  +16 25 21.50  24.4w 15VB164   568  C~2fCN      
2016 10  09.52781  03 33 25.344  +16 24 41.45  24.1w 15VB164   568  C~2fCN      
2016 10  09.59992  03 33 25.071  +16 24 39.91  24.1w 15VB164   568  C~2fCN      
2016 10  10.55675  03 33 21.559  +16 24 19.51  24.0w 15VB164   568  C~2fCN      
2016 10  10.60523  03 33 21.377  +16 24 18.45  24.1w 15VB164   568  C~2fCN      
2016 10  28.47637  03 32 06.418  +16 17 33.67  24.7w 15VB164   568  C~2fCN      
2016 10  29.53828  03 32 01.515  +16 17 08.57  24.4w 15VB164   568  C~2fCN      
2016 10  29.55586  03 32 01.425  +16 17 08.19  24.1w 15VB164   568  C~2fCN      
2016 11  02.59127  03 31 42.423  +16 15 32.25  24.1w 15VB164   568  C~2fCN      
2016 12  24.35153  03 27 43.167  +15 56 53.61  24.1w 15VB164   568  C~2fCN      
2017 01  27.33320  03 26 24.638  +15 50 50.06  23.9w 15VB164   568  C~2fCN      
2017 09  22.59895  03 39 55.373  +16 14 19.49  24.5w 15VB164   568  C~2fCN      
2017 12  13.35764  03 34 08.909  +15 44 50.99  24.2w 15VB164   568  C~2fCN      

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    -0.20       0.00     0.08
  2   0.0494   -101.77    -0.00    -153.72     0.02
  3   0.0627   -206.21    -0.11    -194.64     0.04
  4   0.1313  -1216.51    -0.06    -397.63    -0.03
  5   0.1314  -1219.73    -0.03    -398.06    -0.04
  6   0.1369  -1329.78     0.01    -413.32    -0.03
  7   0.2129  -3180.19     0.10    -608.14    -0.03
  8   0.2131  -3184.78     0.24    -608.37     0.11
  9   0.2133  -3190.18     0.14    -608.84     0.06
 10   0.2161  -3265.86     0.01    -615.32    -0.02
 11   0.2434  -4012.54     0.04    -674.76    -0.01
 12   0.2436  -4019.34    -0.04    -675.32    -0.07
 13   0.2951  -5388.70     0.02    -771.33     0.07
 14   0.2954  -5398.28    -0.14    -772.16    -0.19
 15   0.3636  -6876.61     0.15    -868.99    -0.03
 16   0.3828  -7180.27    -0.03    -890.92     0.04
 17   0.3852  -7213.19    -0.08    -893.46     0.09
 18   0.4621  -7727.88    -0.04    -965.00     0.01
 19   0.4784  -7688.97    -0.04    -978.35    -0.03
 20   1.0515   4386.12     0.07   -2222.83    -0.00
 21   1.1008   3855.23    -0.03   -2385.07    -0.03
 22   1.1060   3774.87     0.03   -2401.72     0.02
 23   1.1334   3288.55     0.14   -2486.19    -0.05
 24   1.1334   3287.87    -0.12   -2486.26    -0.06
 25   1.1337   3283.01    -0.13   -2486.84     0.07
 26   1.1389   3178.63     0.09   -2502.48     0.01
 27   1.1391   3174.44     0.02   -2503.04     0.02
 28   1.1417   3120.49    -0.01   -2510.80     0.00
 29   1.1418   3117.69     0.01   -2511.21    -0.02
 30   1.1907   1973.02    -0.05   -2646.18    -0.00
 31   1.1937   1898.45     0.13   -2653.61    -0.05
 32   1.1937   1897.10     0.05   -2653.67     0.01
 33   1.2048   1608.42     0.01   -2681.07     0.01
 34   1.3465  -2008.45    -0.06   -2929.17     0.00
 35   1.4395  -3196.27    -0.03   -3003.05     0.01
 36   2.0918   8496.82    -0.03   -4425.66    -0.00
 37   2.3157   3220.17    -0.03   -4974.83     0.04

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.

15VB164    quality flag:3

Type:       SCATEXTD  SCATEXTD  SCATEXTD

axisobj        45.289    45.312    45.267
ecceobj         0.087     0.089     0.086
incobj         24.606    24.606    24.606
qmin           40.614    40.575    40.679
qmax           49.507    49.619    49.415
amean          44.945    44.967    44.924
amin           44.594    44.618    44.575
amax           45.318    45.344    45.306
emean           0.081     0.082     0.079
emin            0.070     0.071     0.068
emax            0.093     0.094     0.091
imean          25.677    25.678    25.677
imin           25.390    25.381    25.385
imax           25.926    25.922    25.918
excite_mean     0.441     0.441     0.441
fracstop        1.000     1.000     1.000
cjmean          2.864     2.864     2.864

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       194.1     193.7     194.5
kozaiamp        180.0     180.0     180.0