Orbit Fit and Astrometric record for 15VD166

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: 15VD166   
# Created Tue Mar 26 01:10:22 2019
# Orbit generated from Bernstein formalism
# Fitting   40 observations of   40
# Arc:   3.07y
# First observation: 2014/11/17
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
   0.000332   0.039785  -0.000009  -0.001301   0.031747   0.000000
# Chi-squared of fit:    10.85 DOF:   74 RMS:  0.09
# Min/Max residuals:    -0.40    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.953437E-05  4.073781E-02 -2.810084E-07 -1.330843E-03  3.220553E-02  6.190011E-03
# Covariance matrix:
  2.5359E-13 -2.9607E-13 -3.3983E-15  7.0042E-15 -9.8514E-14 -1.8468E-12
 -2.9607E-13  4.8918E-13  6.7131E-15 -1.3815E-14  1.8606E-13  3.6445E-12
 -3.3983E-15  6.7131E-15  1.4244E-13 -7.7027E-14  2.8081E-15  5.6531E-14
  7.0042E-15 -1.3815E-14 -7.7027E-14  5.6874E-14 -6.0648E-15 -1.1635E-13
 -9.8514E-14  1.8606E-13  2.8081E-15 -6.0648E-15  1.9034E-13  1.5745E-12
 -1.8468E-12  3.6445E-12  5.6531E-14 -1.1635E-13  1.5745E-12  3.0694E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.392531   48.576164   -0.101524   -0.006596   -0.984231  2456978.782278
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:           15.28801 +/-     0.009
Argument of Peri:      157.78736 +/-     0.023
Long of Asc Node:      217.27590 +/-     0.003
Inclination:             1.90996 +/-     0.000
Eccentricity:         0.35872612 +/-    0.0001
Semi-Major Axis:     47.73659981 +/-    0.0052
Time of Perihelion: 2451854.5773 +/-       2.9
Perihelion:          30.61223447 +/-    0.0062
Aphelion:            64.86096516 +/-    0.0088
Period (y)              329.8264 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           21.11528428 +/-    0.0003
Ecliptic Y           24.08896916 +/-    0.0003
Ecliptic Z           -0.21274742 +/-    0.0000
Ecliptic XDOT        -0.00225346 +/-    0.0000
Ecliptic YDOT         0.00268036 +/-    0.0000
Ecliptic ZDOT        -0.00011664 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.03402764 +/-    0.0003
Geocenter to KBO     31.05057045 +/-    0.0004
# Hcoef:  9.39

The following table shows the complete astrometric record for 15VD166. 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 (15VD166) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.28150  03 04 55.475  +16 58 34.44  25.2r 15VD166   568  C~2lVd      
2014 11  17.39021  03 04 54.789  +16 58 31.73  24.3r 15VD166   568  C~2lVd      
2014 11  17.50402  03 04 54.075  +16 58 28.75  24.4r 15VD166   568  C~2lVd      
2014 11  19.29385  03 04 43.154  +16 57 42.52  24.4r 15VD166   568  C~2lVd      
2014 11  23.39737  03 04 18.290  +16 55 57.76  24.5r 15VD166   568  C~2lVd      
2015 09  07.62902  03 19 46.486  +17 53 52.32  24.8w 15VD166   568  C~2lVd      
2015 09  12.49264  03 19 38.241  +17 53 13.74  24.2w 15VD166   568  C~2lVd      
2015 10  07.53854  03 18 14.769  +17 47 20.71  24.5w 15VD166   568  C~2lVd      
2015 10  07.59790  03 18 14.509  +17 47 19.54  24.0w 15VD166   568  C~2lVd      
2015 10  09.57780  03 18 05.336  +17 46 42.03  24.8w 15VD166   568  C~2lVd      
2015 11  07.33264  03 15 24.792  +17 35 53.01  23.8r 15VD166   568  C~2lVd      
2015 11  07.37479  03 15 24.530  +17 35 51.99  24.3r 15VD166   568  C~2lVd      
2015 11  07.41697  03 15 24.262  +17 35 50.94  24.4r 15VD166   568  C~2lVd      
2015 11  10.49950  03 15 05.225  +17 34 34.50  24.4w 15VD166   568  C~2lVd      
2015 11  17.34635  03 14 22.818  +17 31 44.30  24.3w 15VD166   568  C~2lVd      
2015 11  17.39294  03 14 22.529  +17 31 43.09  24.5w 15VD166   568  C~2lVd      
2015 12  06.35508  03 12 29.877  +17 24 11.43  24.5w 15VD166   568  C~2lVd      
2015 12  06.49265  03 12 29.077  +17 24 08.15  23.8w 15VD166   568  C~2lVd      
2016 01  01.34294  03 10 30.738  +17 16 14.57  24.5w 15VD166   568  C~2lVd      
2016 01  01.34872  03 10 30.706  +17 16 14.41  24.5w 15VD166   568  C~2lVd      
2016 01  07.41130  03 10 12.074  +17 15 00.41  25.1w 15VD166   568  C~2lVd      
2016 01  08.25624  03 10 09.841  +17 14 51.29  24.6w 15VD166   568  C~2lVd      
2016 02  05.28768  03 09 44.274  +17 13 13.43  24.3w 15VD166   568  C~2lVd      
2016 02  10.30807  03 09 50.329  +17 13 38.77  24.6w 15VD166   568  C~2lVd      
2016 09  07.59099  03 28 57.050  +18 23 07.89        15VD166   568  C~2lVd      
2016 10  05.50531  03 27 38.580  +18 17 42.50  24.8w 15VD166   568  C~2lVd      
2016 10  07.50982  03 27 29.876  +18 17 08.13  24.5w 15VD166   568  C~2lVd      
2016 10  07.60551  03 27 29.429  +18 17 06.36  24.7w 15VD166   568  C~2lVd      
2016 10  09.51019  03 27 20.843  +18 16 32.74  24.7w 15VD166   568  C~2lVd      
2016 10  09.58259  03 27 20.512  +18 16 31.29  24.8w 15VD166   568  C~2lVd      
2016 11  02.50259  03 25 11.195  +18 08 12.95  24.5w 15VD166   568  C~2lVd      
2016 11  04.47870  03 24 59.261  +18 07 27.31  24.3w 15VD166   568  C~2lVd      
2016 12  25.28177  03 20 10.896  +17 49 11.92  24.9w 15VD166   568  C~2lVd      
2016 12  28.42845  03 19 57.961  +17 48 23.14  24.7w 15VD166   568  C~2lVd      
2016 12  28.44773  03 19 57.866  +17 48 22.89  24.6w 15VD166   568  C~2lVd      
2017 01  27.29772  03 18 49.227  +17 44 08.93  24.6w 15VD166   568  C~2lVd      
2017 09  15.55809  03 37 52.047  +18 49 32.56  24.6w 15VD166   568  C~2lVd      
2017 09  20.60688  03 37 40.999  +18 48 46.62  24.7w 15VD166   568  C~2lVd      
2017 12  13.37172  03 30 23.534  +18 22 07.66  24.5w 15VD166   568  C~2lVd      
2017 12  13.40930  03 30 23.328  +18 22 07.00  24.6w 15VD166   568  C~2lVd      

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     0.10       0.00    -0.08
  2   0.0003    -10.21     0.02       0.10     0.03
  3   0.0006    -20.88    -0.03       0.06     0.02
  4   0.0055   -184.23     0.08      -1.25    -0.05
  5   0.0167   -556.05    -0.05      -3.60    -0.02
  6   0.8059  13191.77     0.03    -192.36    -0.12
  7   0.8192  13067.61    -0.02    -199.47     0.06
  8   0.8878  11820.49    -0.14    -233.67     0.08
  9   0.8879  11816.59     0.07    -233.84    -0.04
 10   0.8934  11679.88     0.03    -236.20     0.03
 11   0.9721   9289.53     0.07    -265.48     0.02
 12   0.9722   9285.64     0.10    -265.48     0.03
 13   0.9723   9281.66     0.04    -265.49     0.03
 14   0.9807   8998.38    -0.04    -267.85    -0.01
 15   0.9995   8367.36    -0.04    -272.58     0.04
 16   0.9996   8363.05     0.00    -272.66    -0.04
 17   1.0515   6686.88    -0.05    -281.72     0.03
 18   1.0519   6674.95    -0.40    -281.84    -0.07
 19   1.1227   4914.18     0.20    -285.74     0.03
 20   1.1227   4913.69     0.01    -285.77     0.00
 21   1.1393   4636.58    -0.09    -285.40     0.17
 22   1.1416   4603.30     0.14    -285.59    -0.05
 23   1.2184   4224.02    -0.19    -281.32     0.06
 24   1.2321   4314.43    -0.04    -280.26     0.16
 25   1.8078  21286.35     0.01    -459.78    -0.01
 26   1.8843  20111.70     0.09    -501.26     0.12
 27   1.8897  19981.87     0.00    -504.05    -0.03
 28   1.8900  19975.20    -0.19    -504.19    -0.08
 29   1.8952  19847.22    -0.06    -506.63    -0.04
 30   1.8954  19842.25     0.04    -506.88    -0.21
 31   1.9609  17917.57     0.13    -532.58    -0.03
 32   1.9663  17740.12     0.09    -534.31    -0.06
 33   2.1054  13457.93    -0.13    -553.46    -0.03
 34   2.1140  13266.07     0.23    -553.29    -0.08
 35   2.1141  13264.69    -0.00    -553.18     0.02
 36   2.1958  12248.02     0.07    -546.55    -0.01
 37   2.8290  29167.43    -0.05    -737.50     0.05
 38   2.8428  29000.94    -0.00    -745.75     0.04
 39   3.0721  22479.09    -0.02    -820.15    -0.01
 40   3.0722  22476.04     0.00    -820.07     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.

15VD166    quality flag:3

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

axisobj        48.320    48.340    48.300
ecceobj         0.367     0.367     0.367
incobj          1.905     1.905     1.905
qmin           29.890    29.892    29.896
qmax           66.532    66.600    66.584
amean          47.797    47.797    47.797
amin           47.284    47.290    47.244
amax           48.444    48.500    48.471
emean           0.362     0.362     0.362
emin            0.349     0.350     0.349
emax            0.374     0.374     0.374
imean           1.776     1.980     1.658
imin            1.191     1.277     0.747
imax            2.864     2.864     2.864
excite_mean     0.363     0.363     0.363
fracstop        1.000     1.000     1.000
cjmean          2.978     2.977     2.978

libcent 0        68.2      67.5      68.6
libamp  0        14.3      11.3      17.7
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       131.6     144.2     119.4
kozaiamp        180.0     180.0     180.0