Orbit Fit and Astrometric record for 15VU169

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: 15VU169   
# Created Tue Apr  1 01:10:40 2025
# Orbit generated from Bernstein formalism
# Fitting     35 observations of     35
# Arc:   2.32y
# First observation: 2015/08/20
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000108   0.023602  -0.000000   0.000654   0.024099   0.000000
# Chi-squared of fit:     3.26 DOF:     64 RMS:  0.05
# Min/Max residuals:    -0.14    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.511012E-05  2.326193E-02  4.093284E-07  6.448531E-04  2.386125E-02  1.142018E-03
# Covariance matrix:
  1.6550E-13 -1.1402E-14 -3.7370E-16  1.9754E-15  1.1364E-13  1.4823E-12
 -1.1402E-14  3.3394E-13 -2.7269E-15  1.1535E-14  1.8535E-13  8.5279E-12
 -3.7370E-16 -2.7269E-15  8.4119E-14 -6.0866E-14 -1.8523E-15 -9.3970E-14
  1.9754E-15  1.1535E-14 -6.0866E-14  8.5710E-14  8.2589E-15  3.9633E-13
  1.1364E-13  1.8535E-13 -1.8523E-15  8.2589E-15  2.2062E-13  6.1294E-12
  1.4823E-12  8.5279E-12 -9.3970E-14  3.9633E-13  6.1294E-12  2.9296E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.118755   53.904605    1.012994    0.000012   -0.057101  2457255.045359
# Heliocentric elements and errors
Epoch:              2457250.5000  =  2015/08/16
Mean Anomaly:           60.94510 +/-     0.599
Argument of Peri:      292.16027 +/-     0.679
Long of Asc Node:       56.79860 +/-     0.002
Inclination:             1.59032 +/-     0.001
Eccentricity:         0.02560008 +/-    0.0007
Semi-Major Axis:     42.48191287 +/-    0.0033
Time of Perihelion: 2440129.0396 +/-     168.3
Perihelion:          41.39437264 +/-    0.0291
Aphelion:            43.56945310 +/-    0.0291
Period (y)              276.8945 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.53795311 +/-    0.0005
Ecliptic Y           33.31312936 +/-    0.0007
Ecliptic Z           -0.08682150 +/-    0.0000
Ecliptic XDOT        -0.00208142 +/-    0.0000
Ecliptic YDOT         0.00167208 +/-    0.0000
Ecliptic ZDOT         0.00007377 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.97569743 +/-    0.0006
Geocenter to KBO     41.90895250 +/-    0.0008
# Hcoef:  7.57

The following table shows the complete astrometric record for 15VU169. 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 (15VU169) followed by the observatory code and reference code for the source of the astrometry.

2015 08  20.54457  03 26 13.952  +18 38 01.26  24.1w 15VU169   568  C~2nw3      
2015 08  20.55007  03 26 13.957  +18 38 01.25  24.2w 15VU169   568  C~2nw3      
2015 09  07.60044  03 26 07.617  +18 37 42.01  24.2w 15VU169   568  C~2nw3      
2015 09  12.44733  03 26 00.691  +18 37 17.83  24.3w 15VU169   568  C~2nw3      
2015 10  07.49766  03 24 52.887  +18 33 16.90  24.0w 15VU169   568  C~2nw3      
2015 10  07.55607  03 24 52.668  +18 33 16.10  23.9w 15VU169   568  C~2nw3      
2015 10  09.53675  03 24 45.288  +18 32 49.65  24.1w 15VU169   568  C~2nw3      
2015 11  06.31257  03 22 40.809  +18 25 19.67  23.7r 15VU169   568  C~2nw3      
2015 11  06.37589  03 22 40.490  +18 25 18.59  23.9r 15VU169   568  C~2nw3      
2015 11  06.44667  03 22 40.117  +18 25 17.22  23.8r 15VU169   568  C~2nw3      
2015 11  07.46686  03 22 35.051  +18 24 58.92  24.1w 15VU169   568  C~2nw3      
2015 11  17.44798  03 21 44.894  +18 21 56.17  24.0w 15VU169   568  C~2nw3      
2015 11  17.49527  03 21 44.650  +18 21 55.30  24.0w 15VU169   568  C~2nw3      
2015 12  06.31417  03 20 12.674  +18 16 18.58  24.0w 15VU169   568  C~2nw3      
2015 12  06.44064  03 20 12.065  +18 16 16.65  23.6w 15VU169   568  C~2nw3      
2015 12  06.44787  03 20 12.043  +18 16 16.27  24.2w 15VU169   568  C~2nw3      
2015 12  31.33561  03 18 33.509  +18 10 15.63  24.0w 15VU169   568  C~2nw3      
2016 01  07.36493  03 18 13.452  +18 09 03.02  24.0w 15VU169   568  C~2nw3      
2016 01  07.38230  03 18 13.399  +18 09 02.83  24.2w 15VU169   568  C~2nw3      
2016 01  07.41708  03 18 13.311  +18 09 02.51  23.8w 15VU169   568  C~2nw3      
2016 02  04.34615  03 17 38.242  +18 07 03.51  24.0w 15VU169   568  C~2nw3      
2016 02  11.23523  03 17 41.416  +18 07 19.26  24.1w 15VU169   568  C~2nw3      
2016 09  07.61412  03 31 33.806  +18 59 24.33        15VU169   568  C~2nw3      
2016 09  27.53935  03 30 52.892  +18 57 06.04  24.1w 15VU169   568  C~2nw3      
2016 10  09.53365  03 30 12.688  +18 54 47.79  24.0w 15VU169   568  C~2nw3      
2016 10  09.60571  03 30 12.408  +18 54 46.81  24.0w 15VU169   568  C~2nw3      
2016 11  02.47946  03 28 27.239  +18 48 40.72  23.9w 15VU169   568  C~2nw3      
2016 11  04.45547  03 28 17.542  +18 48 06.69  23.9w 15VU169   568  C~2nw3      
2016 12  24.34518  03 24 23.158  +18 34 17.61  23.9w 15VU169   568  C~2nw3      
2016 12  29.39711  03 24 05.330  +18 33 14.48  23.7w 15VU169   568  C~2nw3      
2017 01  27.31434  03 23 04.466  +18 29 43.69  24.1w 15VU169   568  C~2nw3      
2017 09  15.55809  03 36 50.749  +19 19 56.47  24.1w 15VU169   568  C~2nw3      
2017 09  20.60688  03 36 40.763  +19 19 24.34  24.1w 15VU169   568  C~2nw3      
2017 12  13.36234  03 30 39.254  +18 59 05.07  23.9w 15VU169   568  C~2nw3      
2017 12  13.40466  03 30 39.062  +18 59 04.34  24.2w 15VU169   568  C~2nw3      

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     0.06       0.00     0.00
     2   0.0000      0.07     0.09      -0.03    -0.03
     3   0.0494    -92.01    -0.05       3.62    -0.00
     4   0.0627   -193.38    -0.07       4.56    -0.03
     5   0.1313  -1187.03    -0.01      10.61     0.03
     6   0.1314  -1190.25    -0.02      10.61     0.00
     7   0.1369  -1298.48     0.03      11.15     0.01
     8   0.2129  -3125.81     0.10      19.48    -0.09
     9   0.2131  -3130.48     0.10      19.57    -0.04
    10   0.2133  -3135.96    -0.14      19.59    -0.08
    11   0.2161  -3210.36    -0.02      20.06     0.02
    12   0.2434  -3947.52    -0.02      23.70     0.02
    13   0.2435  -3951.10    -0.04      23.73     0.03
    14   0.2951  -5304.08     0.05      31.21    -0.07
    15   0.2954  -5312.97    -0.07      31.56     0.19
    16   0.2954  -5313.37     0.03      31.27    -0.10
    17   0.3636  -6764.05     0.02      42.73    -0.06
    18   0.3828  -7059.31     0.07      46.27     0.01
    19   0.3829  -7060.09    -0.03      46.28     0.01
    20   0.3830  -7061.38     0.01      46.29     0.01
    21   0.4594  -7575.71    -0.02      60.50     0.05
    22   0.4783  -7527.86    -0.04      64.01     0.04
    23   1.0515   4718.08     0.03     137.72     0.03
    24   1.1061   4121.21    -0.01     143.07     0.01
    25   1.1389   3534.07     0.01     146.63     0.03
    26   1.1391   3529.97    -0.03     146.64     0.01
    27   1.2045   1992.66    -0.01     154.42     0.04
    28   1.2099   1850.82    -0.01     155.07     0.01
    29   1.3465  -1581.27     0.05     174.86    -0.04
    30   1.3603  -1842.53    -0.12     177.11    -0.01
    31   1.4395  -2733.50     0.00     190.24     0.05
    32   2.0726   9378.45    -0.05     273.64     0.00
    33   2.0864   9233.21    -0.01     275.29     0.02
    34   2.3157   3962.10     0.06     305.27    -0.01
    35   2.3158   3959.28     0.05     305.22    -0.09

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.

15VU169    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        42.886    42.899    42.873
ecceobj         0.034     0.036     0.033
incobj          1.585     1.585     1.586
qmin           40.010    39.956    40.039
qmax           45.340    45.358    45.293
amean          42.563    42.576    42.551
amin           42.236    42.250    42.224
amax           42.914    42.921    42.897
emean           0.036     0.037     0.035
emin            0.010     0.012     0.009
emax            0.057     0.058     0.056
imean           1.353     1.350     1.356
imin            0.570     0.563     0.576
imax            1.883     1.881     1.884
excite_mean     0.044     0.045     0.043
fracstop        1.000     1.000     1.000
cjmean          3.082     3.082     3.082

libcent 0      -180.0    -180.0    -180.0
libamp  0      -180.0    -180.0    -180.0
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       193.0     192.2     194.7
kozaiamp        180.0     180.0     179.9