Orbit Fit and Astrometric record for 15VE166

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: 15VE166   
# Created Tue Apr 23 01:10:47 2019
# Orbit generated from Bernstein formalism
# Fitting   29 observations of   30
# Arc:   2.25y
# First observation: 2015/10/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000175   0.029418   0.000001   0.002196   0.026438   0.000000
# Chi-squared of fit:    14.10 DOF:   52 RMS:  0.12
# Min/Max residuals:    -0.55    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.513337E-05  2.927307E-02  1.831504E-06  2.190546E-03  2.647414E-02  2.808453E-03
# Covariance matrix:
  2.5097E-13 -3.2788E-14 -7.2609E-16  6.2765E-15  1.7516E-13  1.4784E-12
 -3.2788E-14  4.1720E-13 -8.7814E-15  3.6765E-14  2.1048E-13  8.3530E-12
 -7.2609E-16 -8.7814E-15  1.2020E-13 -8.6139E-14 -5.0469E-15 -2.3335E-13
  6.2765E-15  3.6765E-14 -8.6139E-14  1.0786E-13  2.4836E-14  9.7920E-13
  1.7516E-13  2.1048E-13 -5.0469E-15  2.4836E-14  3.0163E-13  5.7028E-12
  1.4784E-12  8.3530E-12 -2.3335E-13  9.7920E-13  5.7028E-12  2.2251E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.917876   51.895323    0.896830   -0.007296   -0.464392  2457277.997529
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           15.03306 +/-     0.091
Argument of Peri:      324.53945 +/-     0.148
Long of Asc Node:       62.56844 +/-     0.002
Inclination:             4.34718 +/-     0.001
Eccentricity:         0.21104506 +/-    0.0003
Semi-Major Axis:     47.77965024 +/-    0.0071
Time of Perihelion: 2452233.0834 +/-      30.4
Perihelion:          37.69599129 +/-    0.0139
Aphelion:            57.86330920 +/-    0.0154
Period (y)              330.2727 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.29482883 +/-    0.0005
Ecliptic Y           29.53066896 +/-    0.0006
Ecliptic Z           -0.60500982 +/-    0.0000
Ecliptic XDOT        -0.00220253 +/-    0.0000
Ecliptic YDOT         0.00209308 +/-    0.0000
Ecliptic ZDOT         0.00022191 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.24480559 +/-    0.0006
Geocenter to KBO     37.77270316 +/-    0.0008
# Hcoef:  9.42

The following table shows the complete astrometric record for 15VE166. 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 (15VE166) followed by the observatory code and reference code for the source of the astrometry.

2015 09  12.49674  03 18 54.205  +17 21 12.80  25.6w 15VE166   568  C~2lVd      
2015 10  07.54436  03 17 39.438  +17 16 29.86  25.3w 15VE166   568  C~2lVd      
2015 10  07.60373  03 17 39.175  +17 16 28.92  25.3w 15VE166   568  C~2lVd      
2015 10  09.58362  03 17 31.134  +17 15 58.84  25.2w 15VE166   568  C~2lVd      
2015 11  07.33788  03 15 11.500  +17 07 20.43  24.9r 15VE166   568  C~2lVd      
2015 11  07.38006  03 15 11.262  +17 07 19.59  25.1r 15VE166   568  C~2lVd      
2015 11  07.42224  03 15 11.039  +17 07 18.92  25.0r 15VE166   568  C~2lVd      
2015 11  10.50536  03 14 54.532  +17 06 18.22  24.9w 15VE166   568  C~2lVd      
2015 11  17.35218  03 14 17.815  +17 04 03.75  25.4w 15VE166   568  C~2lVd      
2015 11  17.39878  03 14 17.563  +17 04 02.91  25.4w 15VE166   568  C~2lVd      
2015 12  06.36096  03 12 39.776  +16 58 10.26  25.0w 15VE166   568  C~2lVd      
2015 12  06.49848  03 12 39.071  +16 58 07.40  25.8w 15VE166   568  C~2lVd      
2016 01  01.34872  03 10 54.982  +16 52 11.99  25.5w 15VE166   568  C~2lVd      
2016 01  08.25624  03 10 36.126  +16 51 14.13  25.3w 15VE166   568  C~2lVd      
2016 02  10.30807  03 10 13.275  +16 51 11.18  25.6w 15VE166   568  C~2lVd      
2016 09  07.62568  03 25 39.428  +17 54 12.18        15VE166   568  C~2lVd      
2016 09  26.58416  03 24 57.484  +17 51 41.50  25.6w 15VE166   568  C~2lVd      
2016 10  09.54522  03 24 10.753  +17 48 54.65  25.6w 15VE166   568  C~2lVd      
2016 10  09.61729  03 24 10.448  +17 48 53.64  25.3w 15VE166   568  C~2lVd      
2016 11  02.49681  03 22 17.011  +17 42 10.62  25.3w 15VE166   568  C~2lVd      
2016 11  02.52573  03 22 16.847  +17 42 10.13  25.1w 15VE166   568  C~2lVd      
2016 11  04.40084  03 22 07.001  +17 41 35.24  25.1w 15VE166   568  C~2lVd      
2016 11  04.47292  03 22 06.622  +17 41 33.90  25.1w 15VE166   568  C~2lVe      
2016 12  25.28177  03 17 56.178  +17 27 10.66  25.5w 15VE166   568  C~2lVe      
2016 12  28.42845  03 17 44.842  +17 26 33.90  25.1w 15VE166   568  C~2lVe      
2017 01  26.34230  03 16 43.675  +17 23 47.66  25.3w 15VE166   568  C~2lVe      
2017 09  16.60340  03 32 04.120  +18 24 57.28  25.4w 15VE166   568  C~2lVe      
2017 09  23.54254  03 31 47.913  +18 24 02.65  25.6w 15VE166   568  C~2lVe      
2017 12  13.39064  03 25 28.924  +18 02 49.33  25.4w 15VE166   568  C~2lVe      
2017 12  13.42791  03 25 28.749  +18 02 48.74  25.2w 15VE166   568  C~2lVe      

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 (   0.48)      0.00 (  -0.11)
  2   0.0686  -1107.45     0.14       2.83    -0.06
  3   0.0687  -1111.33    -0.15       2.89    -0.02
  4   0.0742  -1230.37    -0.02       3.65     0.03
  5   0.1529  -3297.50     0.17      24.08    -0.02
  6   0.1530  -3301.02     0.03      24.16    -0.00
  7   0.1531  -3304.28     0.14      24.35     0.13
  8   0.1616  -3548.62    -0.15      27.77     0.06
  9   0.1803  -4092.09     0.04      36.23    -0.01
 10   0.1804  -4095.80     0.09      36.37     0.05
 11   0.2323  -5542.51    -0.03      66.42    -0.00
 12   0.2327  -5553.03    -0.55      66.34    -0.35
 13   0.3035  -7088.96    -0.03     121.12     0.05
 14   0.3224  -7365.59     0.11     137.72     0.12
 15   0.4129  -7682.88     0.25     222.76     0.13
 16   0.9887   6106.92    -0.04     450.25    -0.15
 17   1.0406   5489.00     0.01     453.39    -0.09
 18   1.0761   4800.78     0.15     458.60     0.03
 19   1.0763   4796.31     0.12     458.71     0.09
 20   1.1417   3125.94    -0.07     476.45    -0.01
 21   1.1418   3123.55    -0.19     476.57     0.07
 22   1.1469   2978.57    -0.08     478.41     0.03
 23   1.1471   2972.99     0.04     478.48    -0.00
 24   1.2862   -710.24     0.05     559.87     0.10
 25   1.2948   -876.45    -0.03     566.30    -0.16
 26   1.3740  -1765.09     0.04     632.73    -0.03
 27   2.0126  11885.90    -0.02     900.63     0.00
 28   2.0316  11648.09     0.07     902.99    -0.10
 29   2.2530   6090.35    -0.03     988.67     0.07
 30   2.2531   6087.78    -0.01     988.72     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.

15VE166    quality flag:3

Type:           2:1E      2:1E      2:1E

axisobj        48.393    48.422    48.366
ecceobj         0.221     0.222     0.221
incobj          4.337     4.337     4.336
qmin           36.660    36.799    36.812
qmax           59.539    59.443    59.427
amean          47.798    47.798    47.798
amin           47.286    47.283    47.311
amax           48.393    48.422    48.366
emean           0.214     0.206     0.213
emin            0.196     0.185     0.196
emax            0.232     0.229     0.230
imean           2.910     3.643     2.981
imin            2.578     2.780     2.742
imax            3.444     4.544     3.480
excite_mean     0.220     0.216     0.219
fracstop        1.000     1.000     1.000
cjmean          3.088     3.090     3.089

libcent 0        83.5      89.4      82.1
libamp  0        28.9      39.5      22.2
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       198.2     198.2     184.4
kozaiamp        180.0     180.0     180.0