Orbit Fit and Astrometric record for 15VA169

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: 15VA169   
# Created Tue Apr  1 01:10:40 2025
# Orbit generated from Bernstein formalism
# Fitting     46 observations of     46
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000026   0.023737  -0.000001   0.000576   0.024121   0.000000
# Chi-squared of fit:    12.14 DOF:     86 RMS:  0.09
# Min/Max residuals:    -0.25    0.33
# Exact a, adot, b, bdot, g, gdot:
  1.523057E-05  2.384832E-02  9.762045E-07  5.796665E-04  2.422683E-02 -3.777341E-04
# Covariance matrix:
  2.3900E-13 -2.6162E-13  2.8328E-15 -4.8405E-15 -1.2670E-13 -2.6881E-12
 -2.6162E-13  3.9924E-13 -5.1545E-15  8.9806E-15  2.1447E-13  4.9590E-12
  2.8328E-15 -5.1545E-15  1.3327E-13 -7.0308E-14 -3.2872E-15 -7.2649E-14
 -4.8405E-15  8.9806E-15 -7.0308E-14  4.9028E-14  4.9864E-15  1.2819E-13
 -1.2670E-13  2.1447E-13 -3.2872E-15  4.9864E-15  2.0563E-13  2.8723E-12
 -2.6881E-12  4.9590E-12 -7.2649E-14  1.2819E-13  2.8723E-12  7.0527E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.706898   47.306895   -0.123478   -0.029095   -0.981308  2456978.792408
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          339.00913 +/-     0.435
Argument of Peri:      332.65839 +/-     0.475
Long of Asc Node:       97.52604 +/-     0.010
Inclination:             2.17450 +/-     0.000
Eccentricity:         0.04095990 +/-    0.0001
Semi-Major Axis:     43.92721479 +/-    0.0024
Time of Perihelion: 2463171.0014 +/-     128.4
Perihelion:          42.12796036 +/-    0.0066
Aphelion:            45.72646923 +/-    0.0067
Period (y)              291.1446 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.54783719 +/-    0.0005
Ecliptic Y           31.13145695 +/-    0.0006
Ecliptic Z           -1.22946208 +/-    0.0000
Ecliptic XDOT        -0.00201275 +/-    0.0000
Ecliptic YDOT         0.00179256 +/-    0.0000
Ecliptic ZDOT         0.00006685 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   42.25704908 +/-    0.0005
Geocenter to KBO     41.27654865 +/-    0.0008
# Hcoef:  8.09

The following table shows the complete astrometric record for 15VA169. 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 (15VA169) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.29163  03 01 21.927  +15 21 40.99  24.4r 15VA169   568  C~2nw0      
2014 11  17.40051  03 01 21.378  +15 21 39.01  24.2r 15VA169   568  C~2nw0      
2014 11  17.51464  03 01 20.838  +15 21 36.75  24.4r 15VA169   568  C~2nw0      
2014 11  19.30670  03 01 12.201  +15 21 01.80  24.4r 15VA169   568  C~2nw0      
2014 11  23.41007  03 00 52.630  +15 19 42.89  24.2r 15VA169   568  C~2nw0      
2015 08  11.62323  03 11 22.423  +16 06 45.66  24.2w 15VA169   568  C~2nw0      
2015 09  07.53281  03 11 15.498  +16 05 22.57  24.4w 15VA169   568  C~2nw0      
2015 09  12.52956  03 11 06.931  +16 04 38.89  24.5w 15VA169   568  C~2nw0      
2015 10  07.47166  03 09 54.356  +15 59 09.94  24.8w 15VA169   568  C~2nw0      
2015 10  08.47583  03 09 50.527  +15 58 53.28  24.5w 15VA169   568  C~2nw0      
2015 10  08.53403  03 09 50.304  +15 58 52.27  24.4w 15VA169   568  C~2nw0      
2015 11  06.29151  03 07 41.717  +15 49 56.76  23.9r 15VA169   568  C~2nw0      
2015 11  06.35485  03 07 41.399  +15 49 55.65  24.2r 15VA169   568  C~2nw0      
2015 11  06.42547  03 07 41.058  +15 49 54.40  24.1r 15VA169   568  C~2nw0      
2015 11  06.49480  03 07 40.704  +15 49 52.80  24.3r 15VA169   568  C~2nw0      
2015 11  07.51356  03 07 35.735  +15 49 32.77  24.4w 15VA169   568  C~2nw0      
2015 11  17.27960  03 06 47.950  +15 46 21.37  24.3w 15VA169   568  C~2nw0      
2015 11  17.32888  03 06 47.706  +15 46 20.54  24.5w 15VA169   568  C~2nw0      
2015 12  06.40765  03 05 18.667  +15 40 35.19  24.6w 15VA169   568  C~2nw0      
2015 12  13.34220  03 04 49.660  +15 38 46.57  24.2w 15VA169   568  C~2nw0      
2015 12  13.40075  03 04 49.425  +15 38 45.79  24.5w 15VA169   568  C~2nw0      
2016 01  01.39556  03 03 45.227  +15 34 59.31  24.9w 15VA169   568  C~2nw0      
2016 01  07.34177  03 03 30.741  +15 34 13.79  24.5w 15VA169   568  C~2nw0      
2016 02  04.27190  03 03 05.966  +15 33 47.22  24.6w 15VA169   568  C~2nw0      
2016 02  10.26162  03 03 10.524  +15 34 23.38  24.5w 15VA169   568  C~2nw0      
2016 09  07.55050  03 16 37.005  +16 28 37.00        15VA169   568  C~2nw0      
2016 09  26.61279  03 15 53.897  +16 25 17.30  24.3w 15VA169   568  C~2nw0      
2016 10  10.42589  03 15 05.484  +16 21 51.39  24.8w 15VA169   568  C~2nw0      
2016 10  10.48430  03 15 05.246  +16 21 50.46  24.6w 15VA169   568  C~2nw0      
2016 10  10.50790  03 15 05.146  +16 21 50.06  24.7w 15VA169   568  C~2nw0      
2016 10  27.51417  03 13 51.148  +16 16 48.29  24.4w 15VA169   568  C~2nw0      
2016 11  03.53920  03 13 17.600  +16 14 34.86  24.3w 15VA169   568  C~2nw0      
2016 12  28.39306  03 09 16.976  +15 59 38.75  25.3w 15VA169   568  C~2nw0      
2016 12  28.40104  03 09 16.960  +15 59 38.66  24.8w 15VA169   568  C~2nw0      
2016 12  29.35861  03 09 14.070  +15 59 29.14  24.9w 15VA169   568  C~2nw0      
2016 12  29.36878  03 09 14.051  +15 59 29.11  24.8w 15VA169   568  C~2nw0      
2017 01  01.25561  03 09 05.786  +15 59 02.33  24.9w 15VA169   568  C~2nw0      
2017 01  01.26608  03 09 05.764  +15 59 02.09  24.9w 15VA169   568  C~2nw0      
2017 01  02.36563  03 09 02.764  +15 58 52.68  24.4w 15VA169   568  C~2nw0      
2017 01  02.37586  03 09 02.738  +15 58 52.61  24.7w 15VA169   568  C~2nw0      
2017 01  26.26424  03 08 24.483  +15 57 19.89  24.6w 15VA169   568  C~2nw0      
2017 01  26.27054  03 08 24.489  +15 57 19.84  24.6w 15VA169   568  C~2nw0      
2017 09  15.60092  03 21 47.558  +16 50 22.28  24.5w 15VA169   568  C~2nw0      
2017 09  22.58685  03 21 31.351  +16 49 10.03        15VA169   568  C~2nw0      
2017 12  16.38250  03 15 25.067  +16 25 46.28  24.4w 15VA169   568  C~2nw0      
2017 12  16.38715  03 15 25.055  +16 25 46.14  24.3w 15VA169   568  C~2nw0      

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     0.07       0.00    -0.12
     2   0.0003     -8.18    -0.08       0.32     0.07
     3   0.0006    -16.31     0.20       0.34    -0.02
     4   0.0055   -146.03    -0.02       1.74     0.12
     5   0.0168   -439.91    -0.06       5.28     0.03
     6   0.7319   9084.86    -0.13     225.13    -0.02
     7   0.8056   8966.19    -0.03     171.82     0.09
     8   0.8193   8835.28    -0.12     162.90     0.06
     9   0.8876   7737.29    -0.08     127.86     0.14
    10   0.8903   7679.54    -0.13     126.72     0.01
    11   0.8905   7676.17    -0.06     126.62    -0.06
    12   0.9692   5743.45     0.07     114.51    -0.11
    13   0.9694   5738.73     0.03     114.69     0.04
    14   0.9696   5733.65     0.19     114.83     0.13
    15   0.9698   5728.29    -0.01     114.69    -0.05
    16   0.9725   5653.78     0.04     114.96    -0.00
    17   0.9993   4937.56     0.01     119.23    -0.15
    18   0.9994   4933.95     0.04     119.39    -0.04
    19   1.0517   3602.35    -0.08     140.13     0.04
    20   1.0706   3169.57    -0.06     151.16    -0.05
    21   1.0708   3166.09     0.02     151.35     0.02
    22   1.1228   2212.03    -0.06     190.07    -0.09
    23   1.1391   1998.29     0.07     204.35    -0.02
    24   1.2156   1646.96    -0.19     278.19    -0.11
    25   1.2320   1720.27     0.09     294.63    -0.04
    26   1.8077  13814.36     0.01     288.43    -0.03
    27   1.8599  13160.74     0.33     258.48    -0.12
    28   1.8977  12431.63     0.06     243.35    -0.01
    29   1.8979  12428.07     0.03     243.35     0.03
    30   1.8979  12426.57    -0.04     243.35     0.03
    31   1.9445  11315.78     0.05     234.25     0.02
    32   1.9637  10813.17     0.08     233.98     0.04
    33   2.1139   7225.48    -0.25     301.44     0.08
    34   2.1139   7225.23    -0.13     301.41     0.04
    35   2.1165   7182.49    -0.14     303.53     0.05
    36   2.1166   7182.21     0.05     303.58     0.07
    37   2.1245   7060.09     0.13     310.08     0.08
    38   2.1245   7059.72     0.20     309.94    -0.09
    39   2.1275   7015.48    -0.00     312.60     0.01
    40   2.1275   7015.10     0.03     312.64     0.02
    41   2.1929   6458.36    -0.00     373.13    -0.00
    42   2.1930   6458.43     0.12     373.05    -0.09
    43   2.8290  18491.64    -0.05     393.82    -0.04
    44   2.8482  18246.27    -0.04     383.50     0.07
    45   3.0803  12766.66    -0.10     395.89     0.04
    46   3.0803  12766.46    -0.02     395.80    -0.06

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.

15VA169    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.267    44.274    44.260
ecceobj         0.046     0.046     0.046
incobj          2.175     2.175     2.175
qmin           40.992    40.972    40.995
qmax           47.068    47.071    47.038
amean          43.922    43.929    43.915
amin           43.576    43.591    43.571
amax           44.279    44.287    44.268
emean           0.048     0.048     0.048
emin            0.031     0.031     0.031
emax            0.063     0.063     0.063
imean           0.814     0.812     0.816
imin            0.000     0.000     0.000
imax            1.337     1.335     1.339
excite_mean     0.050     0.050     0.050
fracstop        1.000     1.000     1.000
cjmean          3.098     3.098     3.097

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       171.7     172.0     171.9
kozaiamp        180.0     180.0     180.0