Orbit Fit and Astrometric record for 15VK169

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: 15VK169   
# Created Tue Apr  1 01:10:40 2025
# Orbit generated from Bernstein formalism
# Fitting     32 observations of     32
# Arc:   2.19y
# First observation: 2014/11/17
#  Last observation: 2017/01/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000066   0.019632   0.000001   0.000236   0.021997   0.000000
# Chi-squared of fit:     8.80 DOF:     58 RMS:  0.09
# Min/Max residuals:    -0.22    0.25
# Exact a, adot, b, bdot, g, gdot:
  1.408449E-05  1.978387E-02  3.271093E-07  2.401304E-04  2.205947E-02  2.872850E-04
# Covariance matrix:
  4.2600E-13 -5.7809E-13  3.8509E-15 -6.5622E-15 -3.0337E-13 -9.2144E-12
 -5.7809E-13  1.0755E-12 -8.6557E-15  1.5095E-14  6.3783E-13  2.0746E-11
  3.8509E-15 -8.6557E-15  2.3264E-13 -1.5248E-13 -5.6486E-15 -1.8952E-13
 -6.5622E-15  1.5095E-14 -1.5248E-13  1.2490E-13  8.8758E-15  3.3463E-13
 -3.0337E-13  6.3783E-13 -5.6486E-15  8.8758E-15  5.4076E-13  1.3440E-11
 -9.2144E-12  2.0746E-11 -1.8952E-13  3.3463E-13  1.3440E-11  4.5467E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.275538   47.146874   -0.128028   -0.038799   -0.980374  2456978.896128
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          164.52871 +/-     0.972
Argument of Peri:      121.16385 +/-     0.972
Long of Asc Node:      119.91538 +/-     0.024
Inclination:             2.33402 +/-     0.000
Eccentricity:         0.05821912 +/-    0.0002
Semi-Major Axis:     43.84158763 +/-    0.0029
Time of Perihelion: 2408512.3274 +/-     286.1
Perihelion:          41.28916888 +/-    0.0109
Aphelion:            46.39400637 +/-    0.0110
Period (y)              290.2937 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           31.37726692 +/-    0.0010
Ecliptic Y           34.01453403 +/-    0.0011
Ecliptic Z           -1.79992589 +/-    0.0001
Ecliptic XDOT        -0.00177931 +/-    0.0000
Ecliptic YDOT         0.00169200 +/-    0.0000
Ecliptic ZDOT         0.00002847 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   46.31156592 +/-    0.0011
Geocenter to KBO     45.33200646 +/-    0.0015
# Hcoef:  8.16

The following table shows the complete astrometric record for 15VK169. 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 (15VK169) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.39535  03 01 23.303  +14 46 14.56  24.7r 15VK169   568  C~2nw1      
2014 11  19.30032  03 01 14.827  +14 45 40.01  24.9r 15VK169   568  C~2nw1      
2014 11  23.40372  03 00 56.794  +14 44 27.04  24.6r 15VK169   568  C~2nw1      
2015 09  12.53366  03 09 54.451  +15 23 37.65  25.2w 15VK169   568  C~2nw1      
2015 10  07.47747  03 08 46.362  +15 18 08.70  24.6w 15VK169   568  C~2nw1      
2015 10  08.48165  03 08 42.797  +15 17 52.64  25.2w 15VK169   568  C~2nw1      
2015 10  08.55151  03 08 42.546  +15 17 51.52  24.7w 15VK169   568  C~2nw1      
2015 10  08.56473  03 08 42.502  +15 17 51.34  24.6w 15VK169   568  C~2nw1      
2015 11  06.29678  03 06 43.737  +15 09 20.44  24.3r 15VK169   568  C~2nw1      
2015 11  06.36009  03 06 43.423  +15 09 19.58  25.4r 15VK169   568  C~2nw1      
2015 11  06.43072  03 06 43.126  +15 09 17.89  25.0r 15VK169   568  C~2nw1      
2015 11  06.50005  03 06 42.803  +15 09 17.05  24.6r 15VK169   568  C~2nw1      
2015 11  07.51946  03 06 38.215  +15 08 57.96  24.6w 15VK169   568  C~2nw1      
2015 11  17.28542  03 05 54.223  +15 05 59.03  24.8w 15VK169   568  C~2nw1      
2015 11  17.33469  03 05 53.987  +15 05 58.17  24.9w 15VK169   568  C~2nw1      
2015 12  06.41351  03 04 32.032  +15 00 38.86  25.0w 15VK169   568  C~2nw1      
2015 12  13.34802  03 04 05.297  +14 58 59.88  25.0w 15VK169   568  C~2nw2      
2015 12  13.40657  03 04 05.082  +14 58 59.16  24.9w 15VK169   568  C~2nw2      
2016 01  01.40134  03 03 05.727  +14 55 35.47  24.9w 15VK169   568  C~2nw2      
2016 01  07.34755  03 02 52.248  +14 54 55.53  24.8w 15VK169   568  C~2nw2      
2016 02  04.27768  03 02 28.230  +14 54 42.09  25.4w 15VK169   568  C~2nw2      
2016 02  10.26747  03 02 32.060  +14 55 17.59  25.3w 15VK169   568  C~2nw2      
2016 09  06.61716  03 14 30.003  +15 43 08.49        15VK169   568  C~2nw2      
2016 09  26.60468  03 13 47.552  +15 39 33.23  25.5w 15VK169   568  C~2nw2      
2016 10  10.41386  03 13 02.344  +15 36 09.29  24.9w 15VK169   568  C~2nw2      
2016 10  10.47261  03 13 02.130  +15 36 08.36  25.2w 15VK169   568  C~2nw2      
2016 10  27.50838  03 11 53.495  +15 31 16.33  25.0w 15VK169   568  C~2nw2      
2016 12  28.40571  03 07 41.417  +15 15 21.55  25.3w 15VK169   568  C~2nw2      
2016 12  29.36323  03 07 38.745  +15 15 13.05  25.0w 15VK169   568  C~2nw2      
2017 01  01.26044  03 07 31.115  +15 14 49.39  24.9w 15VK169   568  C~2nw2      
2017 01  02.37026  03 07 28.333  +15 14 41.07  25.2w 15VK169   568  C~2nw2      
2017 01  26.26424  03 06 52.743  +15 13 26.54  25.3w 15VK169   568  C~2nw2      

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     0.02       0.00    -0.03
     2   0.0052   -127.70    -0.17       1.24     0.01
     3   0.0165   -399.25     0.13       4.45    -0.12
     4   0.8190   7738.11     0.05     119.46    -0.02
     5   0.8873   6699.63     0.01      69.81    -0.02
     6   0.8900   6645.57    -0.09      68.37     0.04
     7   0.8902   6641.76    -0.03      68.28     0.03
     8   0.8903   6641.10     0.03      68.28     0.04
     9   0.9689   4846.59     0.06      45.88    -0.14
    10   0.9691   4841.98    -0.22      46.30     0.25
    11   0.9693   4837.38     0.03      45.85    -0.22
    12   0.9695   4832.65     0.06      46.32     0.24
    13   0.9723   4763.49    -0.05      46.17     0.06
    14   0.9990   4101.52     0.13      48.98    -0.04
    15   0.9991   4097.99    -0.03      49.09     0.02
    16   1.0514   2868.48     0.02      69.38    -0.14
    17   1.0704   2468.79     0.02      81.43     0.00
    18   1.0705   2465.59     0.12      81.60     0.05
    19   1.1225   1582.59    -0.05     124.53     0.06
    20   1.1388   1383.81     0.07     140.49     0.05
    21   1.2153   1045.69    -0.22     224.50     0.01
    22   1.2317   1108.90     0.10     243.13    -0.07
    23   1.8049  11897.62     0.05     180.88     0.07
    24   1.8596  11247.38    -0.05     136.17    -0.04
    25   1.8974  10561.69    -0.07     113.63     0.06
    26   1.8975  10558.46     0.01     113.56     0.05
    27   1.9442   9522.24     0.10      97.57    -0.08
    28   2.1136   5749.02     0.06     164.95    -0.02
    29   2.1163   5709.47    -0.16     167.32    -0.03
    30   2.1242   5596.70     0.05     174.72    -0.02
    31   2.1272   5555.67    -0.01     177.71     0.04
    32   2.1927   5039.49     0.03     246.92    -0.11

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.

15VK169    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.161    44.170    44.151
ecceobj         0.053     0.053     0.053
incobj          2.335     2.335     2.335
qmin           40.699    40.681    40.713
qmax           47.204    47.227    47.204
amean          43.861    43.870    43.852
amin           43.519    43.527    43.507
amax           44.222    44.238    44.204
emean           0.052     0.052     0.052
emin            0.035     0.035     0.035
emax            0.068     0.068     0.068
imean           1.345     1.343     1.348
imin            0.613     0.613     0.611
imax            1.991     1.988     1.995
excite_mean     0.058     0.058     0.058
fracstop        1.000     1.000     1.000
cjmean          3.096     3.096     3.096

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       174.0     173.8     174.8
kozaiamp        180.0     179.9     179.9