Orbit Fit and Astrometric record for 15VO168

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: 15VO168   
# Created Sat Dec  4 02:13:41 2021
# Orbit generated from Bernstein formalism
# Fitting     41 observations of     41
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000229   0.028622   0.000012  -0.002153   0.025781   0.000000
# Chi-squared of fit:     7.85 DOF:     76 RMS:  0.08
# Min/Max residuals:    -0.26    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.710026E-05  2.841983E-02 -1.426640E-06 -2.141677E-03  2.574682E-02 -3.924057E-03
# Covariance matrix:
  2.4861E-13 -2.8281E-13 -6.6981E-15  1.4459E-14 -1.0632E-13 -2.4278E-12
 -2.8281E-13  4.4874E-13  1.2863E-14 -2.7544E-14  1.8353E-13  4.6324E-12
 -6.6981E-15  1.2863E-14  1.4128E-13 -7.9903E-14  5.7069E-15  1.5298E-13
  1.4459E-14 -2.7544E-14 -7.9903E-14  6.1395E-14 -1.3356E-14 -3.2785E-13
 -1.0632E-13  1.8353E-13  5.7069E-15 -1.3356E-14  1.8684E-13  2.2073E-12
 -2.4278E-12  4.6324E-12  1.5298E-13 -3.2785E-13  2.2073E-12  5.5128E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.476244   47.953689   -0.112123   -0.025181   -0.982780  2456978.777218
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          340.75007 +/-     0.026
Argument of Peri:      234.10137 +/-     0.053
Long of Asc Node:      209.64043 +/-     0.002
Inclination:             4.53434 +/-     0.000
Eccentricity:         0.29122706 +/-    0.0002
Semi-Major Axis:     53.81980445 +/-    0.0077
Time of Perihelion: 2464681.9900 +/-      10.2
Perihelion:          38.14602124 +/-    0.0114
Aphelion:            69.49358766 +/-    0.0141
Period (y)              394.8402 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.57555140 +/-    0.0004
Ecliptic Y           29.63964269 +/-    0.0005
Ecliptic Z           -1.00067670 +/-    0.0000
Ecliptic XDOT        -0.00253179 +/-    0.0000
Ecliptic YDOT         0.00170490 +/-    0.0000
Ecliptic ZDOT        -0.00021681 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   39.82172404 +/-    0.0005
Geocenter to KBO     38.83974629 +/-    0.0007
# Hcoef:  8.04

The following table shows the complete astrometric record for 15VO168. 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 (15VO168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27644  03 03 40.651  +15 45 46.23  23.9r 15VO168   568  C~2lVn      
2014 11  17.38513  03 03 40.095  +15 45 43.83  23.5r 15VO168   568  C~2lVn      
2014 11  17.49897  03 03 39.508  +15 45 41.31  24.2r 15VO168   568  C~2lVn      
2014 11  19.28749  03 03 30.591  +15 45 02.53  24.7r 15VO168   568  C~2lVn      
2014 11  23.39103  03 03 10.280  +15 43 34.86  24.5r 15VO168   568  C~2lVn      
2015 08  11.59273  03 14 55.649  +16 28 03.84  24.5w 15VO168   568  C~2lVn      
2015 09  06.62350  03 14 55.916  +16 26 30.57  24.0w 15VO168   568  C~2lVn      
2015 09  12.51312  03 14 46.767  +16 25 34.56  24.1w 15VO168   568  C~2lVn      
2015 10  07.43992  03 13 34.862  +16 19 33.90  24.3w 15VO168   568  C~2lVn      
2015 10  07.44703  03 13 34.824  +16 19 33.69  24.2w 15VO168   568  C~2lVn      
2015 10  08.45165  03 13 30.937  +16 19 15.67  23.9w 15VO168   568  C~2lVn      
2015 10  08.51072  03 13 30.698  +16 19 14.60  24.2w 15VO168   568  C~2lVn      
2015 11  07.35903  03 11 13.010  +16 09 04.46  23.8r 15VO168   568  C~2lVn      
2015 11  07.40112  03 11 12.792  +16 09 03.54  24.5r 15VO168   568  C~2lVn      
2015 11  07.44330  03 11 12.579  +16 09 02.59  23.9r 15VO168   568  C~2lVn      
2015 11  10.52886  03 10 56.887  +16 07 55.68  24.5w 15VO168   568  C~2lVn      
2015 11  17.37547  03 10 22.057  +16 05 28.17  24.3w 15VO168   568  C~2lVn      
2015 12  06.38432  03 08 49.549  +15 59 04.78  24.0w 15VO168   568  C~2lVn      
2015 12  13.31874  03 08 19.235  +15 57 02.03  24.5w 15VO168   568  C~2lVn      
2015 12  13.37723  03 08 18.977  +15 57 01.06  24.1w 15VO168   568  C~2lVn      
2016 01  01.37186  03 07 11.931  +15 52 37.96  24.3w 15VO168   568  C~2lVn      
2016 01  07.31862  03 06 56.839  +15 51 41.89  24.5w 15VO168   568  C~2lVn      
2016 02  04.29505  03 06 31.995  +15 50 34.92  24.2w 15VO168   568  C~2lVn      
2016 02  04.30157  03 06 31.999  +15 50 34.97  24.1w 15VO168   568  C~2lVn      
2016 02  10.28486  03 06 37.190  +15 51 04.45  24.2w 15VO168   568  C~2lVn      
2016 09  07.56206  03 21 34.130  +16 44 29.45  24.8w 15VO168   568  C~2lVn      
2016 09  26.59656  03 20 52.971  +16 40 47.28  23.8w 15VO168   568  C~2lVn      
2016 09  26.62090  03 20 52.894  +16 40 46.94  23.9w 15VO168   568  C~2lVn      
2016 10  10.40230  03 20 04.439  +16 37 01.23  23.9w 15VO168   568  C~2lVn      
2016 10  10.46065  03 20 04.201  +16 37 00.19  23.9w 15VO168   568  C~2lVn      
2016 10  27.49679  03 18 48.281  +16 31 29.14  24.2w 15VO168   568  C~2lVn      
2016 11  02.51995  03 18 18.607  +16 29 23.69  24.2w 15VO168   568  C~2lVn      
2016 11  02.60285  03 18 18.196  +16 29 22.13  24.0w 15VO168   568  C~2lVn      
2016 11  03.52184  03 18 13.578  +16 29 02.69  24.7w 15VO168   568  C~2lVn      
2016 11  04.39506  03 18 09.192  +16 28 44.30  23.9w 15VO168   568  C~2lVn      
2017 01  02.40371  03 13 46.366  +16 11 27.42  24.6w 15VO168   568  C~2lVn      
2017 01  26.29235  03 13 06.291  +16 09 20.31  24.1w 15VO168   568  C~2lVn      
2017 01  26.32220  03 13 06.276  +16 09 20.32  23.8w 15VO168   568  C~2lVn      
2017 09  21.62755  03 27 53.395  +16 59 38.50  24.4w 15VO168   568  C~2lVn      
2017 09  22.56874  03 27 51.100  +16 59 26.74  24.3w 15VO168   568  C~2lVn      
2017 12  16.37785  03 21 32.534  +16 33 38.97  23.9w 15VO168   568  C~2lVn      

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     0.02
     2   0.0003     -8.38     0.03      -0.08    -0.02
     3   0.0006    -17.22    -0.07      -0.16    -0.02
     4   0.0055   -151.65     0.04      -1.78    -0.03
     5   0.0167   -457.71     0.05      -4.72    -0.03
     6   0.7319  10058.76     0.03    -186.32    -0.04
     7   0.8031  10037.83     0.16    -277.41    -0.22
     8   0.8193   9895.75    -0.10    -296.73     0.09
     9   0.8875   8800.14     0.14    -370.76     0.01
    10   0.8875   8799.56    -0.02    -370.81    -0.03
    11   0.8903   8740.72    -0.05    -373.34     0.03
    12   0.8904   8737.11    -0.10    -373.46     0.04
    13   0.9722   6660.35     0.09    -432.49    -0.02
    14   0.9723   6657.07     0.07    -432.53    -0.03
    15   0.9724   6653.86     0.12    -432.62    -0.08
    16   0.9808   6417.86    -0.08    -436.42     0.01
    17   0.9996   5894.28    -0.05    -443.59     0.04
    18   1.0516   4505.80    -0.07    -452.62     0.04
    19   1.0706   4051.53    -0.01    -452.20    -0.00
    20   1.0708   4047.68    -0.11    -452.12     0.05
    21   1.1228   3045.14     0.05    -442.07    -0.05
    22   1.1391   2820.30    -0.03    -436.58     0.06
    23   1.2157   2457.10    -0.13    -403.01     0.06
    24   1.2157   2457.17    -0.11    -402.98     0.08
    25   1.2321   2537.29    -0.08    -395.11     0.06
    26   1.8078  15869.41    -0.01    -723.76     0.00
    27   1.8599  15237.35    -0.03    -787.14    -0.05
    28   1.8599  15236.18    -0.06    -787.18    -0.02
    29   1.8977  14501.41    -0.03    -826.28     0.01
    30   1.8978  14497.81    -0.03    -826.40     0.01
    31   1.9445  13352.64    -0.02    -864.14     0.10
    32   1.9610  12906.13    -0.00    -874.55    -0.05
    33   1.9612  12900.00     0.19    -874.52     0.10
    34   1.9637  12830.53    -0.02    -876.03     0.00
    35   1.9661  12764.58    -0.02    -877.39    -0.01
    36   2.1277   8830.93     0.08    -884.23     0.03
    37   2.1931   8239.55     0.03    -853.39    -0.04
    38   2.1931   8239.34     0.06    -853.33    -0.02
    39   2.8456  21412.43    -0.26   -1218.67     0.05
    40   2.8482  21377.24     0.10   -1221.90     0.01
    41   3.0804  15679.85     0.15   -1348.53    -0.16

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.

15VO168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        54.307    54.325    54.289
ecceobj         0.295     0.295     0.294
incobj          4.517     4.517     4.517
qmin           37.400    37.417    37.425
qmax           70.756    70.726    70.650
amean          53.690    53.680    53.637
amin           53.138    53.106    53.052
amax           54.364    54.379    54.369
emean           0.290     0.289     0.288
emin            0.279     0.279     0.276
emax            0.302     0.301     0.301
imean           5.221     5.206     5.222
imin            4.825     4.774     4.799
imax            5.700     5.708     5.712
excite_mean     0.304     0.303     0.302
fracstop        1.000     1.000     1.000
cjmean          3.106     3.106     3.106

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       186.6     186.4     184.5
kozaiamp        180.0     180.0     180.0