Orbit Fit and Astrometric record for 15VD173

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: 15VD173   
# Created Tue Apr  1 01:10:43 2025
# Orbit generated from Bernstein formalism
# Fitting     42 observations of     42
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000029   0.025039  -0.000003   0.000640   0.024710   0.000000
# Chi-squared of fit:    12.60 DOF:     78 RMS:  0.10
# Min/Max residuals:    -0.24    0.28
# Exact a, adot, b, bdot, g, gdot:
  1.560231E-05  2.514559E-02  3.860729E-07  6.432157E-04  2.483796E-02 -4.136301E-04
# Covariance matrix:
  2.8952E-13 -3.1829E-13  3.8424E-15 -6.2876E-15 -1.4559E-13 -2.9932E-12
 -3.1829E-13  4.6705E-13 -6.5732E-15  1.0767E-14  2.4782E-13  5.1247E-12
  3.8424E-15 -6.5732E-15  1.4724E-13 -7.4673E-14 -4.2687E-15 -8.0738E-14
 -6.2876E-15  1.0767E-14 -7.4673E-14  4.9930E-14  6.2828E-15  1.3219E-13
 -1.4559E-13  2.4782E-13 -4.2687E-15  6.2828E-15  2.4276E-13  3.0513E-12
 -2.9932E-12  5.1247E-12 -8.0738E-14  1.3219E-13  3.0513E-12  6.2921E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.311513   48.595550   -0.101103   -0.022383   -0.984042  2456978.777218
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          348.17831 +/-     0.220
Argument of Peri:      332.59105 +/-     0.257
Long of Asc Node:       89.82171 +/-     0.009
Inclination:             1.94781 +/-     0.000
Eccentricity:         0.07363429 +/-    0.0001
Semi-Major Axis:     44.43585442 +/-    0.0028
Time of Perihelion: 2460523.3419 +/-      66.1
Perihelion:          41.16385162 +/-    0.0047
Aphelion:            47.70785721 +/-    0.0049
Period (y)              296.2160 +/-      0.03
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           27.19244593 +/-    0.0005
Ecliptic Y           30.99686156 +/-    0.0006
Ecliptic Z           -0.92149974 +/-    0.0000
Ecliptic XDOT        -0.00211233 +/-    0.0000
Ecliptic YDOT         0.00179522 +/-    0.0000
Ecliptic ZDOT         0.00007203 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.24419601 +/-    0.0006
Geocenter to KBO     40.26096236 +/-    0.0008
# Hcoef:  8.74

The following table shows the complete astrometric record for 15VD173. 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 (15VD173) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27644  03 06 03.294  +16 05 52.33  24.5r 15VD173   568  C~2nwG      
2014 11  17.38513  03 06 02.731  +16 05 50.25  25.8r 15VD173   568  C~2nwG      
2014 11  17.49897  03 06 02.162  +16 05 47.89  24.4r 15VD173   568  C~2nwG      
2014 11  19.28749  03 05 53.312  +16 05 12.74  25.0r 15VD173   568  C~2nwG      
2015 08  11.59273  03 16 21.618  +16 50 38.85  24.5w 15VD173   568  C~2nwG      
2015 09  12.51312  03 16 10.357  +16 49 07.85  25.7w 15VD173   568  C~2nwG      
2015 10  07.43992  03 14 58.659  +16 44 01.35  24.8w 15VD173   568  C~2nwG      
2015 10  07.44703  03 14 58.653  +16 44 01.50  25.1w 15VD173   568  C~2nwG      
2015 10  08.45165  03 14 54.796  +16 43 45.53  25.3w 15VD173   568  C~2nwG      
2015 11  07.35903  03 12 38.633  +16 34 41.08  24.6r 15VD173   568  C~2nwG      
2015 11  07.40112  03 12 38.419  +16 34 40.10  25.1r 15VD173   568  C~2nwG      
2015 11  07.44330  03 12 38.211  +16 34 39.45  24.4r 15VD173   568  C~2nwG      
2015 11  10.52886  03 12 22.721  +16 33 38.74  25.0w 15VD173   568  C~2nwG      
2015 11  17.37547  03 11 48.320  +16 31 25.32  25.0w 15VD173   568  C~2nwG      
2015 11  17.42215  03 11 48.085  +16 31 24.49  25.1w 15VD173   568  C~2nwG      
2015 12  06.38432  03 10 16.735  +16 25 36.66  24.8w 15VD173   568  C~2nwG      
2015 12  13.31874  03 09 46.563  +16 23 45.13  25.0w 15VD173   568  C~2nwG      
2015 12  13.37723  03 09 46.338  +16 23 44.04  25.1w 15VD173   568  C~2nwG      
2016 01  01.37186  03 08 38.997  +16 19 45.25  25.1w 15VD173   568  C~2nwG      
2016 01  07.31862  03 08 23.580  +16 18 54.93  25.5w 15VD173   568  C~2nwG      
2016 02  04.29505  03 07 55.500  +16 18 03.52  25.7w 15VD173   568  C~2nwG      
2016 02  04.30157  03 07 55.498  +16 18 03.69  25.6w 15VD173   568  C~2nwG      
2016 02  10.28486  03 07 59.597  +16 18 34.24  25.6w 15VD173   568  C~2nwG      
2016 09  07.62568  03 21 59.173  +17 13 45.76  25.1w 15VD173   568  C~2nwG      
2016 10  10.40230  03 20 29.276  +17 07 32.16  24.9w 15VD173   568  C~2nwG      
2016 10  10.46065  03 20 29.046  +17 07 31.25  24.9w 15VD173   568  C~2nwG      
2016 11  02.51995  03 18 44.825  +17 00 47.18  25.2w 15VD173   568  C~2nwG      
2016 11  02.52573  03 18 44.795  +17 00 46.95  24.9w 15VD173   568  C~2nwG      
2016 11  04.39506  03 18 35.550  +17 00 11.73  24.9w 15VD173   568  C~2nwG      
2016 11  04.40084  03 18 35.523  +17 00 11.61  25.1w 15VD173   568  C~2nwG      
2016 12  24.29598  03 14 44.632  +16 46 05.80        15VD173   568  C~2nwG      
2016 12  24.31334  03 14 44.569  +16 46 05.56  25.1w 15VD173   568  C~2nwG      
2017 01  02.39822  03 14 15.634  +16 44 28.50  24.9w 15VD173   568  C~2nwG      
2017 01  02.41556  03 14 15.573  +16 44 28.61  25.1w 15VD173   568  C~2nwG      
2017 01  26.32220  03 13 34.007  +16 42 35.58  24.6w 15VD173   568  C~2nwG      
2017 01  26.32908  03 13 33.993  +16 42 35.60  24.5w 15VD173   568  C~2nwG      
2017 09  15.58250  03 27 30.089  +17 36 19.94  25.1w 15VD173   568  C~2nwG      
2017 09  17.60038  03 27 25.995  +17 36 02.64  25.4w 15VD173   568  C~2nwG      
2017 09  22.56874  03 27 14.410  +17 35 15.03  25.5w 15VD173   568  C~2nwG      
2017 09  24.59522  03 27 09.078  +17 34 53.54  25.1w 15VD173   568  C~2nwG      
2017 12  16.36856  03 21 00.885  +17 12 20.36  25.3w 15VD173   568  C~2nwG      
2017 12  16.39181  03 21 00.788  +17 12 19.74  24.9w 15VD173   568  C~2nwG      

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     0.08       0.00     0.00
     2   0.0003     -8.37    -0.10       0.22     0.11
     3   0.0006    -16.91    -0.03       0.20    -0.01
     4   0.0055   -149.21     0.00       1.33     0.04
     5   0.7319   9294.97     0.02     207.39    -0.11
     6   0.8193   9114.76    -0.01     161.81    -0.02
     7   0.8875   8038.85    -0.24     136.30    -0.02
     8   0.8875   8038.81     0.13     136.47     0.14
     9   0.8903   7981.07    -0.10     135.65     0.03
    10   0.9722   5947.64     0.19     128.47     0.12
    11   0.9723   5944.41     0.15     128.34    -0.03
    12   0.9724   5941.36     0.28     128.51     0.11
    13   0.9808   5710.34    -0.05     129.27    -0.10
    14   0.9996   5197.66    -0.11     132.60     0.01
    15   0.9997   5194.18    -0.05     132.70     0.07
    16   1.0516   3834.38    -0.06     149.66    -0.24
    17   1.0706   3386.11    -0.13     159.09     0.04
    18   1.0708   3382.69     0.15     158.91    -0.24
    19   1.1228   2384.82    -0.06     190.79    -0.09
    20   1.1391   2157.52    -0.14     202.48     0.03
    21   1.2157   1754.45     0.15     262.69    -0.09
    22   1.2157   1754.47     0.13     262.86     0.07
    23   1.2321   1819.57    -0.11     276.24     0.07
    24   1.8079  14346.81    -0.01     298.30    -0.01
    25   1.8977  12999.90    -0.02     266.15     0.02
    26   1.8978  12996.47     0.06     266.12    -0.01
    27   1.9610  11442.92     0.01     260.47     0.06
    28   1.9610  11442.45    -0.04     260.36    -0.05
    29   1.9661  11304.82    -0.06     260.64    -0.01
    30   1.9661  11304.42    -0.03     260.62    -0.03
    31   2.1027   7877.02    -0.01     309.54     0.07
    32   2.1028   7876.09    -0.02     309.55     0.04
    33   2.1276   7449.02    -0.00     325.55    -0.23
    34   2.1277   7448.20    -0.08     325.89     0.08
    35   2.1931   6841.73     0.13     374.82     0.01
    36   2.1932   6841.54     0.00     374.90     0.07
    37   2.8290  19304.24     0.07     420.56     0.05
    38   2.8346  19242.72    -0.04     418.28    -0.01
    39   2.8482  19068.95    -0.01     413.17     0.05
    40   2.8537  18989.09     0.03     411.24     0.09
    41   3.0803  13513.75     0.00     429.08     0.09
    42   3.0804  13512.24    -0.04     428.84    -0.19

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.

15VD173    quality flag:3

Type:      CLASSICAL CLASSICAL CLASSICAL

axisobj        44.787    44.795    44.779
ecceobj         0.079     0.080     0.079
incobj          1.948     1.948     1.948
qmin           40.059    40.068    40.045
qmax           49.044    49.040    48.997
amean          44.419    44.429    44.411
amin           44.056    44.067    44.058
amax           44.797    44.809    44.789
emean           0.079     0.079     0.079
emin            0.063     0.063     0.064
emax            0.095     0.095     0.094
imean           0.661     0.658     0.663
imin            0.236     0.229     0.241
imax            1.038     1.033     1.040
excite_mean     0.080     0.080     0.080
fracstop        1.000     1.000     1.000
cjmean          3.099     3.099     3.099

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       176.7     176.8     176.3
kozaiamp        180.0     180.0     180.0