Orbit Fit and Astrometric record for 15VW165

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: 15VW165   
# Created Sat Jun  6 01:12:12 2020
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting   41 observations of   41
# Arc:  12.18y
# First observation: 2005/10/11
#  Last observation: 2017/12/16
# Chi-squared of fit:     4.25 DOF:   76 RMS:  0.06
# Min/Max residuals:    -0.18    0.12
# Exact a, adot, b, bdot, g, gdot:
  1.757623E-05  3.758618E-02  6.718802E-07  2.001228E-03  3.359535E-02 -1.562517E-03
# Covariance matrix:
  2.4452E-13 -4.2203E-14  3.3562E-16 -1.0620E-15 -1.8431E-14 -4.4381E-14
 -4.2203E-14  7.5932E-14 -1.2915E-15  3.9842E-15  4.3220E-14  1.6502E-13
  3.3562E-16 -1.2915E-15  2.3844E-13 -2.2158E-14 -5.6858E-16 -2.9172E-15
 -1.0620E-15  3.9842E-15 -2.2158E-14  2.5634E-15  2.0450E-15  8.9670E-15
 -1.8431E-14  4.3220E-14 -5.6858E-16  2.0450E-15  9.7501E-14  8.8998E-14
 -4.4381E-14  1.6502E-13 -2.9172E-15  8.9670E-15  8.8998E-14  3.7092E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
   -4.104789   26.626902    0.148469   -0.070868   -0.989029  2453654.892306
# Heliocentric elements and errors
Epoch:              2453654.5000  =  2005/10/11
Mean Anomaly:          244.61229 +/-     0.027
Argument of Peri:       68.05815 +/-     0.023
Long of Asc Node:       78.87722 +/-     0.000
Inclination:             5.00145 +/-     0.000
Eccentricity:         0.05276116 +/-    0.0000
Semi-Major Axis:     30.00653971 +/-    0.0009
Time of Perihelion: 2472897.7922 +/-       4.8
Perihelion:          28.42335975 +/-    0.0010
Aphelion:            31.58971967 +/-    0.0011
Period (y)              164.3736 +/-      0.01
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.48953387 +/-    0.0002
Ecliptic Y           13.61674367 +/-    0.0001
Ecliptic Z           -2.13064848 +/-    0.0000
Ecliptic XDOT        -0.00147381 +/-    0.0000
Ecliptic YDOT         0.00268000 +/-    0.0000
Ecliptic ZDOT         0.00017180 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   30.75111941 +/-    0.0002
Geocenter to KBO     29.76607657 +/-    0.0003
# Hcoef:  8.25

The following table shows the complete astrometric record for 15VW165. 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 (15VW165) followed by the observatory code and reference code for the source of the astrometry.

2005 10  11.391563 01 44 46.36   +06 26 20.1         15VW165   645  C~2lVc      
2005 10  11.392392 01 44 46.35   +06 26 20.0         15VW165   645  C~2lVc      
2005 10  11.394880 01 44 46.34   +06 26 19.8         15VW165   645  C~2lVc      
2005 10  12.384590 01 44 40.31   +06 25 45.6         15VW165   645  C~2lVc      
2005 10  12.385419 01 44 40.30   +06 25 45.5         15VW165   645  C~2lVc      
2005 10  12.387907 01 44 40.28   +06 25 45.4         15VW165   645  C~2lVc      
2015 08  11.63062  03 09 45.936  +14 58 42.42  23.3w 15VW165   568  C~2lVc      
2015 08  12.57765  03 09 47.313  +14 58 44.35  23.3w 15VW165   568  C~2lVc      
2015 09  07.53691  03 09 39.447  +14 56 35.88  23.3w 15VW165   568  C~2lVc      
2015 09  12.53366  03 09 28.106  +14 55 33.25  23.2w 15VW165   568  C~2lVc      
2015 10  08.48165  03 07 44.449  +14 47 27.56  23.2w 15VW165   568  C~2lVc      
2015 10  08.53987  03 07 44.137  +14 47 26.20  23.1w 15VW165   568  C~2lVc      
2015 10  08.55151  03 07 44.069  +14 47 25.83  23.1w 15VW165   568  C~2lVc      
2015 10  08.56473  03 07 44.001  +14 47 25.56  23.1w 15VW165   568  C~2lVc      
2015 11  06.29678  03 04 48.010  +14 35 14.86  22.8r 15VW165   568  C~2lVc      
2015 11  06.36009  03 04 47.578  +14 35 13.24  22.8r 15VW165   568  C~2lVc      
2015 11  06.43072  03 04 47.103  +14 35 11.36  22.8r 15VW165   568  C~2lVc      
2015 11  06.50005  03 04 46.633  +14 35 09.55  22.8r 15VW165   568  C~2lVc      
2015 11  17.29127  03 03 34.476  +14 30 28.72  22.9w 15VW165   568  C~2lVc      
2015 11  17.34053  03 03 34.139  +14 30 27.59  23.0w 15VW165   568  C~2lVc      
2016 09  06.59240  03 18 14.860  +15 41 03.18        15VW165   568  C~2lVc      
2016 09  26.58845  03 17 16.936  +15 36 24.61  23.1w 15VW165   568  C~2lVc      
2016 09  26.59251  03 17 16.915  +15 36 24.51  23.1w 15VW165   568  C~2lVc      
2016 10  10.39070  03 16 11.806  +15 31 47.24  23.3w 15VW165   568  C~2lVc      
2016 10  10.39652  03 16 11.777  +15 31 47.02  23.2w 15VW165   568  C~2lVc      
2016 10  10.44903  03 16 11.482  +15 31 45.91  23.2w 15VW165   568  C~2lVc      
2016 10  10.45485  03 16 11.453  +15 31 45.79  23.3w 15VW165   568  C~2lVc      
2016 10  27.50838  03 14 30.240  +15 25 00.41  23.1w 15VW165   568  C~2lVc      
2016 11  03.53341  03 13 44.258  +15 22 03.10  23.1w 15VW165   568  C~2lVc      
2016 12  28.38265  03 08 15.708  +15 03 16.75  23.6w 15VW165   568  C~2lVc      
2016 12  28.40571  03 08 15.614  +15 03 16.54  23.6w 15VW165   568  C~2lVc      
2016 12  29.34821  03 08 11.802  +15 03 06.50  23.2w 15VW165   568  C~2lVc      
2016 12  29.36323  03 08 11.752  +15 03 06.33  23.1w 15VW165   568  C~2lVc      
2017 01  01.24491  03 08 00.745  +15 02 38.43  22.8w 15VW165   568  C~2lVc      
2017 01  01.26044  03 08 00.687  +15 02 38.26  22.8w 15VW165   568  C~2lVc      
2017 01  02.35523  03 07 56.741  +15 02 28.70  23.2w 15VW165   568  C~2lVc      
2017 01  02.37026  03 07 56.687  +15 02 28.62  23.2w 15VW165   568  C~2lVc      
2017 01  26.25843  03 07 08.094  +15 01 45.27  23.0w 15VW165   568  C~2lVc      
2017 09  15.57624  03 26 37.390  +16 22 50.56  23.2w 15VW165   568  C~2lVc      
2017 09  21.62152  03 26 19.901  +16 21 31.67  23.2w 15VW165   568  C~2lVc      
2017 12  16.35462  03 17 56.866  +15 51 17.11  23.1w 15VW165   568  C~2lVc      

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     0.00       0.00     0.06
  2   0.0000      0.00    -0.07       0.00    -0.01
  3   0.0000      0.00     0.01       0.00    -0.12
  4   0.0027      0.00     0.11       0.00     0.08
  5   0.0027      0.00     0.03       0.00     0.01
  6   0.0027      0.00    -0.03       0.00    -0.01
  7   9.8323      0.00     0.03       0.00    -0.01
  8   9.8349      0.00     0.08       0.00     0.03
  9   9.9059      0.00    -0.12       0.00     0.07
 10   9.9196      0.00    -0.06       0.00     0.01
 11   9.9907      0.00    -0.05       0.00     0.07
 12   9.9908      0.00    -0.03       0.00     0.05
 13   9.9909      0.00    -0.12       0.00    -0.05
 14   9.9909      0.00    -0.07       0.00    -0.02
 15  10.0696      0.00     0.10       0.00     0.00
 16  10.0697      0.00     0.05       0.00     0.04
 17  10.0699      0.00     0.11       0.00     0.02
 18  10.0701      0.00     0.12       0.00     0.04
 19  10.0997      0.00     0.07       0.00    -0.09
 20  10.0998      0.00     0.01       0.00     0.01
 21  10.9054      0.00     0.00       0.00    -0.01
 22  10.9602      0.00     0.04       0.00    -0.06
 23  10.9602      0.00    -0.03       0.00    -0.09
 24  10.9979      0.00     0.06       0.00     0.04
 25  10.9980      0.00     0.10       0.00    -0.06
 26  10.9981      0.00    -0.04       0.00    -0.02
 27  10.9981      0.00     0.00       0.00    -0.01
 28  11.0448      0.00    -0.01       0.00    -0.00
 29  11.0640      0.00     0.05       0.00     0.01
 30  11.2142      0.00    -0.05       0.00    -0.03
 31  11.2143      0.00    -0.01       0.00     0.02
 32  11.2169      0.00    -0.18       0.00     0.03
 33  11.2169      0.00    -0.00       0.00     0.02
 34  11.2248      0.00    -0.02       0.00     0.07
 35  11.2248      0.00    -0.01       0.00     0.04
 36  11.2278      0.00     0.01       0.00    -0.02
 37  11.2279      0.00     0.01       0.00     0.03
 38  11.2933      0.00     0.04       0.00    -0.00
 39  11.9293      0.00     0.03       0.00     0.06
 40  11.9459      0.00     0.02       0.00    -0.08
 41  12.1806      0.00     0.07       0.00    -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.

15VW165    quality flag:3

Type:            1:1       1:1       1:1

axisobj        30.317    30.317    30.317
ecceobj         0.048     0.048     0.048
incobj          4.993     4.993     4.993
qmin           27.760    27.760    27.760
qmax           32.623    32.622    32.623
amean          30.110    30.110    30.110
amin           29.799    29.801    29.797
amax           30.475    30.491    30.489
emean           0.048     0.047     0.048
emin            0.023     0.023     0.023
emax            0.072     0.072     0.072
imean           3.500     3.499     3.499
imin            3.290     3.288     3.291
imax            3.772     3.772     3.772
excite_mean     0.078     0.078     0.078
fracstop        1.000     1.000     1.000
cjmean          2.993     2.993     2.993

libcent 0        64.1      64.2      64.1
libamp  0        24.1      24.3      24.1
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       179.3     179.6     179.5
kozaiamp        180.0     180.0     180.0