Orbit Fit and Astrometric record for 15VE165

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: 15VE165   
# Created Tue Feb 19 02:10:39 2019
# Orbit generated from Bernstein formalism
# Fitting   31 observations of   31
# Arc:   2.32y
# First observation: 2015/08/20
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000212   0.035611   0.000000   0.000386   0.030484   0.000000
# Chi-squared of fit:     7.18 DOF:   56 RMS:  0.09
# Min/Max residuals:    -0.29    0.18
# Exact a, adot, b, bdot, g, gdot:
  1.818874E-05  3.517604E-02  1.396414E-08  3.821996E-04  3.028698E-02  6.035186E-03
# Covariance matrix:
  2.2105E-13 -4.5027E-14 -1.4950E-17  6.3447E-16  1.3560E-13  8.9868E-13
 -4.5027E-14  4.4116E-13 -1.2303E-15  5.2615E-15  2.0745E-13  7.1673E-12
 -1.4950E-17 -1.2303E-15  1.1087E-13 -8.4031E-14 -6.3153E-16 -2.6456E-14
  6.3447E-16  5.2615E-15 -8.4031E-14  1.0883E-13  3.3018E-15  1.1345E-13
  1.3560E-13  2.0745E-13 -6.3153E-16  3.3018E-15  2.4669E-13  4.5340E-12
  8.9868E-13  7.1673E-12 -2.6456E-14  1.1345E-13  4.5340E-12  1.5457E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.116934   52.766932    1.011623   -0.000025   -0.077594  2457255.068249
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:           32.05205 +/-     0.035
Argument of Peri:      300.94487 +/-     0.069
Long of Asc Node:       61.71683 +/-     0.008
Inclination:             0.62811 +/-     0.001
Eccentricity:         0.21138586 +/-    0.0003
Semi-Major Axis:     39.52424859 +/-    0.0062
Time of Perihelion: 2449169.8325 +/-       8.7
Perihelion:          31.16938147 +/-    0.0133
Aphelion:            47.87911571 +/-    0.0145
Period (y)              248.4870 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           20.82584398 +/-    0.0003
Ecliptic Y           25.73736914 +/-    0.0004
Ecliptic Z           -0.06736186 +/-    0.0000
Ecliptic XDOT        -0.00220355 +/-    0.0000
Ecliptic YDOT         0.00235202 +/-    0.0000
Ecliptic ZDOT         0.00003349 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.10789159 +/-    0.0004
Geocenter to KBO     33.01748837 +/-    0.0005
# Hcoef:  9.68

The following table shows the complete astrometric record for 15VE165. 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 (15VE165) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.56746  03 21 35.105  +18 21 01.86  25.0w 15VE165   568  C~2lVZ      
2015 09  07.61267  03 21 28.538  +18 20 37.58  25.2w 15VE165   568  C~2lVZ      
2015 10  07.53854  03 19 56.722  +18 14 54.62  25.0w 15VE165   568  C~2lVZ      
2015 10  07.59790  03 19 56.438  +18 14 53.53  25.2w 15VE165   568  C~2lVZ      
2015 10  09.57780  03 19 47.332  +18 14 19.46  24.9w 15VE165   568  C~2lVZ      
2015 11  07.33264  03 17 07.841  +18 04 17.24  24.6r 15VE165   568  C~2lVZ      
2015 11  07.37479  03 17 07.588  +18 04 16.26  24.8r 15VE165   568  C~2lVZ      
2015 11  07.41697  03 17 07.323  +18 04 15.24  24.4r 15VE165   568  C~2lVZ      
2015 11  10.49950  03 16 48.379  +18 03 03.39  25.3w 15VE165   568  C~2lVZ      
2015 11  17.34635  03 16 06.198  +18 00 22.60  25.0w 15VE165   568  C~2lVZ      
2015 11  17.39294  03 16 05.909  +18 00 21.57  24.8w 15VE165   568  C~2lVZ      
2015 12  06.35508  03 14 13.444  +17 53 11.15  24.5w 15VE165   568  C~2lVZ      
2016 01  01.34294  03 12 13.138  +17 45 29.06  24.9w 15VE165   568  C~2lVZ      
2016 01  07.40549  03 11 53.955  +17 44 15.60  25.1w 15VE165   568  C~2lVZ      
2016 01  08.25043  03 11 51.604  +17 44 06.93  25.2w 15VE165   568  C~2lVZ      
2016 02  05.28189  03 11 21.812  +17 42 20.82  24.5w 15VE165   568  C~2lVZ      
2016 02  10.30227  03 11 26.837  +17 42 43.05  24.8w 15VE165   568  C~2lVZ      
2016 09  07.59677  03 29 41.685  +18 51 55.45        15VE165   568  C~2lVZ      
2016 10  07.51560  03 28 13.569  +18 46 43.82  25.3w 15VE165   568  C~2lVZ      
2016 10  09.51605  03 28 04.537  +18 46 11.69  25.6w 15VE165   568  C~2lVZ      
2016 10  09.58836  03 28 04.210  +18 46 10.53  25.0w 15VE165   568  C~2lVZ      
2016 11  02.47946  03 25 55.483  +18 38 29.40  24.9w 15VE165   568  C~2lVZ      
2016 11  02.50259  03 25 55.343  +18 38 28.94  24.9w 15VE165   568  C~2lVZ      
2016 11  04.45547  03 25 43.606  +18 37 46.60  25.3w 15VE165   568  C~2lVZ      
2016 11  04.47870  03 25 43.462  +18 37 46.04  25.4w 15VE165   568  C~2lVZ      
2016 12  28.43500  03 20 42.305  +18 19 28.16  24.9w 15VE165   568  C~2lVZ      
2016 12  28.44773  03 20 42.272  +18 19 28.03  24.8w 15VE165   568  C~2lVZ      
2017 01  27.31434  03 19 30.993  +18 15 10.76  24.9w 15VE165   568  C~2lVZ      
2017 09  15.55809  03 37 41.196  +19 20 55.33  25.1w 15VE165   568  C~2lVa      
2017 09  20.60688  03 37 29.787  +19 20 17.30  25.0w 15VE165   568  C~2lVa      
2017 12  13.40466  03 30 11.885  +18 55 20.77  24.8w 15VE165   568  C~2lVa      

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     0.04       0.00     0.04
  2   0.0494    -96.60    -0.01       0.23     0.07
  3   0.1313  -1448.46    -0.07       1.68     0.05
  4   0.1315  -1452.65    -0.22       1.66     0.01
  5   0.1369  -1586.79    -0.04       1.91     0.08
  6   0.2156  -3938.91     0.03       5.86     0.02
  7   0.2158  -3942.65     0.15       5.85    -0.03
  8   0.2159  -3946.56     0.10       5.84    -0.06
  9   0.2243  -4226.22    -0.18       6.61     0.04
 10   0.2431  -4849.29     0.03       7.99    -0.04
 11   0.2432  -4853.54     0.09       8.07     0.01
 12   0.2951  -6516.41    -0.11      13.18     0.04
 13   0.3663  -8297.74    -0.01      22.00    -0.04
 14   0.3829  -8581.94     0.05      24.09    -0.29
 15   0.3852  -8616.68    -0.02      24.67     0.00
 16   0.4619  -9056.05     0.05      35.89    -0.18
 17   0.4757  -8980.77     0.07      38.16     0.03
 18   1.0514   7163.58     0.06      79.27    -0.04
 19   1.1333   5873.00     0.09      81.83     0.09
 20   1.1388   5740.66    -0.01      82.07     0.10
 21   1.1390   5735.87     0.18      82.08     0.08
 22   1.2044   3848.69    -0.03      85.62     0.04
 23   1.2045   3846.65    -0.00      85.67     0.07
 24   1.2098   3674.48    -0.05      86.01     0.05
 25   1.2099   3672.36    -0.07      85.97     0.01
 26   1.3576   -750.91    -0.14     100.45    -0.04
 27   1.3576   -751.40     0.14     100.44    -0.05
 28   1.4394  -1798.66    -0.06     111.12     0.02
 29   2.0725  14198.14     0.01     158.20     0.04
 30   2.0864  14031.47    -0.02     158.62    -0.12
 31   2.3158   7629.74    -0.05     174.70    -0.02

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.

15VE165    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.985    40.009    39.960
ecceobj         0.221     0.222     0.220
incobj          0.627     0.627     0.627
qmin           30.612    30.586    30.656
qmax           49.019    48.995    48.796
amean          39.456    39.456    39.456
amin           38.978    38.963    38.977
amax           40.004    40.030    40.004
emean           0.208     0.208     0.207
emin            0.190     0.192     0.191
emax            0.226     0.225     0.223
imean           1.282     1.272     1.301
imin            0.807     0.716     0.935
imax            1.846     1.874     1.650
excite_mean     0.209     0.210     0.208
fracstop        1.000     1.000     1.000
cjmean          3.002     3.001     3.002

libcent 0       180.2     179.9     179.4
libamp  0        97.4     106.7      87.7
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       170.2     165.1     178.8
kozaiamp        180.0     179.9     180.0