Orbit Fit and Astrometric record for 15VC168

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: 15VC168   
# Created Sat Dec  4 02:13:40 2021
# Orbit generated from Bernstein formalism
# Fitting     33 observations of     33
# Arc:   3.07y
# First observation: 2014/11/17
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000414   0.034179   0.000040  -0.004386   0.029568   0.000000
# Chi-squared of fit:     7.15 DOF:     60 RMS:  0.08
# Min/Max residuals:    -0.35    0.22
# Exact a, adot, b, bdot, g, gdot:
  1.836177E-05  3.369735E-02 -2.693662E-06 -4.332690E-03  2.951553E-02 -6.500094E-03
# Covariance matrix:
  2.5382E-13 -2.8746E-13 -1.0850E-14  2.4709E-14 -1.0339E-13 -2.0248E-12
 -2.8746E-13  4.7941E-13  2.2211E-14 -5.0377E-14  2.0121E-13  4.1318E-12
 -1.0850E-14  2.2211E-14  1.5550E-13 -8.7299E-14  1.0151E-14  2.2126E-13
  2.4709E-14 -5.0377E-14 -8.7299E-14  7.1224E-14 -2.5600E-14 -5.0280E-13
 -1.0339E-13  2.0121E-13  1.0151E-14 -2.5600E-14  2.2469E-13  2.0526E-12
 -2.0248E-12  4.1318E-12  2.2126E-13 -5.0280E-13  2.0526E-12  4.1221E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.586772   47.894489   -0.113051   -0.044219   -0.982001  2456978.772168
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:          329.94021 +/-     0.013
Argument of Peri:      251.47480 +/-     0.029
Long of Asc Node:      209.19230 +/-     0.001
Inclination:             7.72192 +/-     0.000
Eccentricity:         0.28104678 +/-    0.0002
Semi-Major Axis:     44.33919963 +/-    0.0059
Time of Perihelion: 2465975.0846 +/-       3.6
Perihelion:          31.87781023 +/-    0.0089
Aphelion:            56.80058903 +/-    0.0109
Period (y)              295.2500 +/-      0.06
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           23.26573905 +/-    0.0004
Ecliptic Y           25.91728322 +/-    0.0004
Ecliptic Z           -1.52920933 +/-    0.0000
Ecliptic XDOT        -0.00273933 +/-    0.0000
Ecliptic YDOT         0.00163051 +/-    0.0000
Ecliptic ZDOT        -0.00037417 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   34.86170771 +/-    0.0004
Geocenter to KBO     33.88046629 +/-    0.0005
# Hcoef:  9.17

The following table shows the complete astrometric record for 15VC168. 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 (15VC168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.27139  03 04 42.815  +14 40 45.07  24.6r 15VC168   568  C~2lVl      
2014 11  17.38009  03 04 42.203  +14 40 42.26  24.6r 15VC168   568  C~2lVl      
2014 11  17.49387  03 04 41.517  +14 40 39.24  24.1r 15VC168   568  C~2lVl      
2014 11  19.28114  03 04 31.474  +14 39 54.13  24.4r 15VC168   568  C~2lVl      
2014 11  23.38468  03 04 08.535  +14 38 12.26  24.3r 15VC168   568  C~2lVl      
2015 08  11.60150  03 17 45.953  +15 26 56.15  24.8w 15VC168   568  C~2lVl      
2015 09  06.61481  03 17 50.063  +15 24 02.30  24.8w 15VC168   568  C~2lVl      
2015 09  12.50491  03 17 40.483  +15 22 43.60  24.8w 15VC168   568  C~2lVl      
2015 10  07.42821  03 16 21.558  +15 14 57.83  25.1w 15VC168   568  C~2lVl      
2015 11  07.34843  03 13 42.246  +15 02 14.91  24.4r 15VC168   568  C~2lVl      
2015 11  07.39058  03 13 42.002  +15 02 13.85  24.5r 15VC168   568  C~2lVl      
2015 11  07.43274  03 13 41.747  +15 02 12.66  24.7r 15VC168   568  C~2lVl      
2015 11  17.36382  03 12 44.624  +14 58 00.30  24.5w 15VC168   568  C~2lVl      
2015 11  17.41043  03 12 44.355  +14 57 59.18  24.5w 15VC168   568  C~2lVl      
2015 12  06.37266  03 10 59.699  +14 50 38.02  24.8w 15VC168   568  C~2lVl      
2015 12  13.30706  03 10 25.231  +14 48 19.41  24.8w 15VC168   568  C~2lVl      
2015 12  13.36559  03 10 24.965  +14 48 18.35  24.9w 15VC168   568  C~2lVl      
2016 01  01.36029  03 09 08.729  +14 43 29.50  24.8w 15VC168   568  C~2lVl      
2016 01  07.30705  03 08 51.580  +14 42 30.78  24.9w 15VC168   568  C~2lVl      
2016 02  04.34036  03 08 23.485  +14 41 47.09  25.3w 15VC168   568  C~2lVl      
2016 02  11.22942  03 08 30.750  +14 42 35.98  24.8w 15VC168   568  C~2lVl      
2016 09  07.56785  03 25 49.829  +15 39 09.96        15VC168   568  C~2lVl      
2016 09  27.50655  03 25 03.043  +15 33 53.47  24.6w 15VC168   568  C~2lVl      
2016 10  10.44325  03 24 12.349  +15 29 23.83  25.0w 15VC168   568  C~2lVl      
2016 10  10.51973  03 24 12.005  +15 29 22.11  24.7w 15VC168   568  C~2lVl      
2016 11  02.51417  03 22 13.901  +15 20 08.77  24.7w 15VC168   568  C~2lVl      
2016 11  04.38927  03 22 03.273  +15 19 21.86  24.5w 15VC168   568  C~2lVl      
2016 12  24.31885  03 17 36.863  +15 01 34.40  25.0w 15VC168   568  C~2lVl      
2017 01  02.42106  03 17 03.628  +14 59 41.13  25.0w 15VC168   568  C~2lVl      
2017 01  26.33541  03 16 17.243  +14 57 44.93  24.9w 15VC168   568  C~2lVl      
2017 09  16.59057  03 33 44.523  +15 51 44.25  24.8w 15VC168   568  C~2lVl      
2017 09  23.53642  03 33 27.780  +15 49 52.59  24.5w 15VC168   568  C~2lVl      
2017 12  13.36708  03 26 38.934  +15 20 13.38  24.6w 15VC168   568  C~2lVl      

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     0.08
     2   0.0003     -9.31     0.11      -0.25    -0.04
     3   0.0006    -19.71    -0.35      -0.41    -0.03
     4   0.0055   -172.23     0.10      -3.58    -0.01
     5   0.0167   -520.32     0.20      -9.57     0.06
     6   0.7319  11683.12     0.03    -378.55    -0.07
     7   0.8031  11695.08     0.11    -562.18     0.04
     8   0.8193  11540.29     0.01    -601.97    -0.01
     9   0.8875  10312.82    -0.02    -752.00     0.03
    10   0.9721   7881.73     0.03    -877.41     0.05
    11   0.9723   7878.03     0.05    -877.49     0.06
    12   0.9724   7874.15    -0.11    -877.66    -0.01
    13   0.9996   7008.05    -0.03    -900.22    -0.05
    14   0.9997   7003.99     0.03    -900.26    -0.02
    15   1.0516   5422.78     0.03    -918.56    -0.12
    16   1.0706   4903.77    -0.25    -917.42     0.01
    17   1.0708   4899.77     0.01    -917.40    -0.02
    18   1.1228   3756.56     0.03    -896.55     0.02
    19   1.1390   3501.08    -0.00    -885.60    -0.04
    20   1.2158   3096.80     0.12    -816.94     0.07
    21   1.2347   3211.55     0.03    -798.53     0.01
    22   1.8078  18667.81     0.02   -1470.34    -0.06
    23   1.8624  17928.08    -0.08   -1605.90    -0.07
    24   1.8978  17145.36    -0.04   -1680.72    -0.01
    25   1.8980  17140.08     0.01   -1681.12    -0.04
    26   1.9610  15336.38    -0.01   -1779.48    -0.02
    27   1.9661  15174.86     0.01   -1785.31     0.02
    28   2.1028  11156.61    -0.01   -1815.04     0.02
    29   2.1277  10660.83     0.06   -1798.00    -0.11
    30   2.1932   9980.05    -0.07   -1733.22     0.22
    31   2.8318  25573.56     0.06   -2448.05     0.00
    32   2.8508  25308.07    -0.07   -2497.67    -0.02
    33   3.0721  19072.12     0.05   -2754.83     0.04

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.

15VC168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        44.655    44.668    44.643
ecceobj         0.282     0.282     0.282
incobj          7.693     7.693     7.693
qmin           31.478    31.453    30.519
qmax           59.192    62.092    62.069
amean          44.315    45.255    39.731
amin           42.238    42.464    35.024
amax           45.673    47.523    47.179
emean           0.216     0.266     0.185
emin            0.154     0.212     0.032
emax            0.296     0.311     0.316
imean           6.679     8.177     7.829
imin            2.858     4.650     5.044
imax            9.499    10.109     9.850
excite_mean     0.248     0.303     0.235
fracstop        1.000     1.000     1.000
cjmean          3.029     3.003     2.990

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       182.6     177.3     181.4
kozaiamp        180.0     180.0     180.0