Orbit Fit and Astrometric record for 15VU165

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: 15VU165   
# Created Sat Dec  4 02:13:38 2021
# Orbit generated from Bernstein formalism
# Fitting     37 observations of     37
# Arc:   2.35y
# First observation: 2015/08/11
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000179   0.034218  -0.000018   0.002673   0.029732   0.000000
# Chi-squared of fit:     3.45 DOF:     68 RMS:  0.05
# Min/Max residuals:    -0.13    0.12
# Exact a, adot, b, bdot, g, gdot:
  1.804899E-05  3.341838E-02  1.457644E-06  2.603015E-03  2.932028E-02 -2.078239E-03
# Covariance matrix:
  1.9405E-13 -5.5533E-15  1.1174E-15  8.6002E-15  1.3015E-13  2.1579E-12
 -5.5533E-15  5.2467E-13 -8.7443E-15  5.3097E-14  2.8748E-13  1.3272E-11
  1.1174E-15 -8.7443E-15  9.3820E-14 -8.6735E-14 -3.9343E-15 -3.1397E-13
  8.6002E-15  5.3097E-14 -8.6735E-14  1.3897E-13  3.6976E-14  1.8076E-12
  1.3015E-13  2.8748E-13 -3.9343E-15  3.6976E-14  2.7129E-13  9.2494E-12
  2.1579E-12  1.3272E-11 -3.1397E-13  1.8076E-12  9.2494E-12  4.5177E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.676614   50.780243    1.015122    0.001962    0.039280  2457246.110859
# Heliocentric elements and errors
Epoch:              2457240.5000  =  2015/08/06
Mean Anomaly:          330.04817 +/-     0.132
Argument of Peri:        9.48018 +/-     0.200
Long of Asc Node:       80.44423 +/-     0.003
Inclination:             5.13587 +/-     0.001
Eccentricity:         0.16053845 +/-    0.0004
Semi-Major Axis:     39.22224989 +/-    0.0055
Time of Perihelion: 2464705.2979 +/-      32.8
Perihelion:          32.92557049 +/-    0.0179
Aphelion:            45.51892928 +/-    0.0185
Period (y)              245.6444 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           22.29920514 +/-    0.0004
Ecliptic Y           25.72166109 +/-    0.0005
Ecliptic Z           -1.59263173 +/-    0.0000
Ecliptic XDOT        -0.00253500 +/-    0.0000
Ecliptic YDOT         0.00182536 +/-    0.0000
Ecliptic ZDOT         0.00025192 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.07924405 +/-    0.0004
Geocenter to KBO     34.10608112 +/-    0.0006
# Hcoef:  9.09

The following table shows the complete astrometric record for 15VU165. 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 (15VU165) followed by the observatory code and reference code for the source of the astrometry.

2015 08  11.61007  03 16 18.876  +15 21 58.26  24.9w 15VU165   568  C~2lVc      
2015 09  06.62757  03 16 19.697  +15 20 33.87  24.1w 15VU165   568  C~2lVc      
2015 09  12.51723  03 16 09.189  +15 19 35.02  24.7w 15VU165   568  C~2lVc      
2015 10  07.45292  03 14 45.762  +15 13 10.22  24.2w 15VU165   568  C~2lVc      
2015 10  08.45753  03 14 41.245  +15 12 50.83  24.4w 15VU165   568  C~2lVc      
2015 10  08.51654  03 14 40.979  +15 12 49.77  24.6w 15VU165   568  C~2lVc      
2015 11  07.36952  03 12 00.414  +15 02 05.50  24.3r 15VU165   568  C~2lVc      
2015 11  07.41164  03 12 00.158  +15 02 04.60  24.2r 15VU165   568  C~2lVc      
2015 11  07.45387  03 11 59.908  +15 02 03.67  24.3r 15VU165   568  C~2lVc      
2015 11  10.54061  03 11 41.594  +15 00 54.18  24.6w 15VU165   568  C~2lVc      
2015 11  17.38710  03 11 00.906  +14 58 22.71  24.5w 15VU165   568  C~2lVc      
2015 11  17.43381  03 11 00.632  +14 58 21.71  24.6w 15VU165   568  C~2lVc      
2015 12  06.39596  03 09 12.815  +14 52 01.68  24.5w 15VU165   568  C~2lVc      
2015 12  13.33048  03 08 37.365  +14 50 05.69  24.5w 15VU165   568  C~2lVc      
2015 12  13.38903  03 08 37.078  +14 50 04.77  24.6w 15VU165   568  C~2lVc      
2016 01  01.38342  03 07 18.679  +14 46 19.49  24.6w 15VU165   568  C~2lVc      
2016 01  02.34977  03 07 15.566  +14 46 11.99  24.2w 15VU165   568  C~2lVc      
2016 01  07.33018  03 07 01.029  +14 45 41.21  24.2w 15VU165   568  C~2lVc      
2016 02  04.30735  03 06 31.662  +14 46 36.72  25.3w 15VU165   568  C~2lVc      
2016 02  04.31413  03 06 31.676  +14 46 36.91  25.1w 15VU165   568  C~2lVc      
2016 02  04.32117  03 06 31.676  +14 46 36.94  25.3w 15VU165   568  C~2lVc      
2016 02  04.32803  03 06 31.677  +14 46 37.06  25.1w 15VU165   568  C~2lVc      
2016 02  05.26985  03 06 32.324  +14 46 45.85  25.0w 15VU165   568  C~2lVc      
2016 02  05.27611  03 06 32.321  +14 46 45.79  24.9w 15VU165   568  C~2lVc      
2016 02  10.29646  03 06 37.575  +14 47 40.04  24.7w 15VU165   568  C~2lVc      
2016 09  07.56785  03 23 55.647  +15 59 00.09        15VU165   568  C~2lVc      
2016 09  27.50655  03 23 05.361  +15 55 02.55  24.7w 15VU165   568  C~2lVc      
2016 10  10.44325  03 22 12.176  +15 51 21.57  24.7w 15VU165   568  C~2lVc      
2016 10  10.50202  03 22 11.893  +15 51 20.51  25.0w 15VU165   568  C~2lVc      
2016 10  10.51973  03 22 11.812  +15 51 20.18  24.7w 15VU165   568  C~2lVc      
2016 11  02.51417  03 20 09.184  +15 43 27.99  24.5w 15VU165   568  C~2lVc      
2016 11  04.38927  03 19 58.192  +15 42 47.32  24.6w 15VU165   568  C~2lVc      
2016 12  24.31885  03 15 24.060  +15 27 33.94  24.6w 15VU165   568  C~2lVc      
2017 01  02.42106  03 14 49.960  +15 26 06.78  24.4w 15VU165   568  C~2lVc      
2017 01  26.29235  03 14 02.301  +15 25 18.93  24.7w 15VU165   568  C~2lVc      
2017 01  26.30729  03 14 02.298  +15 25 18.88  24.5w 15VU165   568  C~2lVc      
2017 12  16.37785  03 23 47.019  +16 08 42.13  24.8w 15VU165   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    -0.01       0.00    -0.01
     2   0.0712    -10.55     0.05     -84.57    -0.06
     3   0.0874   -172.65    -0.07    -101.72     0.08
     4   0.1556  -1438.51    -0.02    -157.06     0.03
     5   0.1584  -1506.69    -0.04    -158.60    -0.06
     6   0.1585  -1510.69     0.09    -158.61    -0.01
     7   0.2403  -3923.78     0.03    -165.92    -0.02
     8   0.2404  -3927.60     0.00    -165.80     0.04
     9   0.2405  -3931.34     0.07    -165.74     0.04
    10   0.2490  -4205.69     0.01    -162.21    -0.05
    11   0.2677  -4814.57    -0.06    -151.22    -0.03
    12   0.2678  -4818.67     0.06    -151.12    -0.04
    13   0.3197  -6427.30     0.07     -99.01     0.05
    14   0.3387  -6954.10    -0.10     -72.48     0.08
    15   0.3389  -6958.36    -0.02     -72.24     0.06
    16   0.3909  -8115.46    -0.05      17.85     0.07
    17   0.3935  -8161.02    -0.10      22.86    -0.09
    18   0.4072  -8372.67    -0.07      50.37     0.02
    19   0.4838  -8768.28    -0.06     219.50    -0.10
    20   0.4838  -8768.03     0.12     219.63    -0.02
    21   0.4838  -8768.02     0.06     219.66    -0.03
    22   0.4838  -8767.98     0.03     219.77     0.04
    23   0.4864  -8756.54     0.05     225.68     0.04
    24   0.4864  -8756.60    -0.08     225.64    -0.05
    25   0.5002  -8668.37     0.05     257.19    -0.04
    26   1.0759   6948.55    -0.01     455.38     0.01
    27   1.1304   6186.04    -0.02     408.73    -0.01
    28   1.1659   5387.15     0.02     389.57    -0.02
    29   1.1660   5382.93    -0.03     389.58     0.03
    30   1.1661   5381.71     0.02     389.56     0.02
    31   1.2290   3548.93     0.01     384.92     0.04
    32   1.2342   3385.05    -0.04     386.34     0.03
    33   1.3709   -677.39     0.08     531.18     0.12
    34   1.3958  -1176.03    -0.01     576.33    -0.05
    35   1.4611  -1853.53    -0.07     711.37     0.00
    36   1.4612  -1853.59     0.01     711.34    -0.13
    37   2.3484   6975.08     0.02    1050.31    -0.01

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.

15VU165    quality flag:3

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

axisobj        39.590    39.597    39.584
ecceobj         0.164     0.164     0.164
incobj          5.131     5.131     5.131
qmin           32.487    32.465    32.481
qmax           47.145    47.129    47.113
amean          39.458    39.458    39.458
amin           38.965    38.972    38.952
amax           40.011    40.001    40.015
emean           0.160     0.160     0.160
emin            0.141     0.141     0.141
emax            0.178     0.179     0.179
imean           3.202     3.261     3.148
imin            2.515     2.580     2.435
imax            4.026     4.020     4.069
excite_mean     0.169     0.170     0.169
fracstop        1.000     1.000     1.000
cjmean          3.019     3.019     3.020

libcent 0       179.8     179.9     179.9
libamp  0       110.0     108.5     113.5
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       184.3     177.1     191.7
kozaiamp        179.9     179.9     180.0