Orbit Fit and Astrometric record for 15VT167

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: 15VT167   
# Created Mon Dec  6 02:13:39 2021
# Orbit generated from Bernstein formalism
# Fitting     34 observations of     34
# Arc:   2.28y
# First observation: 2015/09/06
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000110   0.026255  -0.000004   0.002462   0.024654   0.000000
# Chi-squared of fit:     5.75 DOF:     62 RMS:  0.07
# Min/Max residuals:    -0.23    0.14
# Exact a, adot, b, bdot, g, gdot:
  1.732040E-05  2.605456E-02  1.512413E-06  2.446919E-03  2.457540E-02  1.857436E-03
# Covariance matrix:
  1.8928E-13 -3.9111E-14  1.4768E-15  4.5802E-15  1.2286E-13  1.0991E-12
 -3.9111E-14  3.4584E-13 -6.5704E-15  3.5564E-14  1.6514E-13  7.9336E-12
  1.4768E-15 -6.5704E-15  1.0037E-13 -7.4107E-14 -1.4800E-15 -2.0527E-13
  4.5802E-15  3.5564E-14 -7.4107E-14  9.7946E-14  2.2973E-14  1.1156E-12
  1.2286E-13  1.6514E-13 -1.4800E-15  2.2973E-14  2.2757E-13  5.2169E-12
  1.0991E-12  7.9336E-12 -2.0527E-13  1.1156E-12  5.2169E-12  2.4890E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -3.297698   51.400866    0.936471   -0.021810   -0.381083  2457272.115599
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           11.30031 +/-     0.134
Argument of Peri:      311.39402 +/-     0.204
Long of Asc Node:       81.74965 +/-     0.003
Inclination:             6.20668 +/-     0.001
Eccentricity:         0.18903137 +/-    0.0002
Semi-Major Axis:     50.31174753 +/-    0.0067
Time of Perihelion: 2453178.9263 +/-      48.5
Perihelion:          40.80124918 +/-    0.0133
Aphelion:            59.82224587 +/-    0.0145
Period (y)              356.8719 +/-      0.07
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           26.30972622 +/-    0.0005
Ecliptic Y           31.46255073 +/-    0.0006
Ecliptic Z           -2.34064061 +/-    0.0000
Ecliptic XDOT        -0.00213171 +/-    0.0000
Ecliptic YDOT         0.00197816 +/-    0.0000
Ecliptic ZDOT         0.00026030 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   41.08007291 +/-    0.0006
Geocenter to KBO     40.69110244 +/-    0.0008
# Hcoef:  8.72

The following table shows the complete astrometric record for 15VT167. 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 (15VT167) followed by the observatory code and reference code for the source of the astrometry.

2015 09  06.61481  03 19 27.695  +14 55 36.06  25.9w 15VT167   568  C~2lVk      
2015 09  12.50491  03 19 19.002  +14 54 43.69  25.3w 15VT167   568  C~2lVk      
2015 10  07.42821  03 18 09.821  +14 49 14.32  24.9w 15VT167   568  C~2lVk      
2015 10  08.44001  03 18 06.055  +14 48 58.14  24.8w 15VT167   568  C~2lVk      
2015 11  07.34843  03 15 52.179  +14 40 03.29  25.0r 15VT167   568  C~2lVk      
2015 11  07.39058  03 15 51.978  +14 40 02.21  24.4r 15VT167   568  C~2lVk      
2015 11  07.43274  03 15 51.770  +14 40 01.58  24.8r 15VT167   568  C~2lVk      
2015 11  10.51713  03 15 36.476  +14 39 04.96  25.0w 15VT167   568  C~2lVk      
2015 11  10.54648  03 15 36.315  +14 39 04.46  24.8w 15VT167   568  C~2lVk      
2015 11  17.36382  03 15 02.412  +14 37 01.19  24.9w 15VT167   568  C~2lVk      
2015 11  17.41043  03 15 02.175  +14 37 00.43  25.0w 15VT167   568  C~2lVk      
2015 12  06.37266  03 13 31.388  +14 31 52.67  24.8w 15VT167   568  C~2lVk      
2015 12  13.30706  03 13 01.278  +14 30 19.87  24.9w 15VT167   568  C~2lVk      
2015 12  13.36559  03 13 01.033  +14 30 19.09  25.2w 15VT167   568  C~2lVk      
2016 01  01.36029  03 11 53.503  +14 27 21.29  25.0w 15VT167   568  C~2lVk      
2016 01  07.30705  03 11 37.931  +14 26 52.20  25.0w 15VT167   568  C~2lVk      
2016 02  11.22942  03 11 13.290  +14 28 52.54  25.0w 15VT167   568  C~2lVk      
2016 09  07.56785  03 25 14.931  +15 26 09.25        15VT167   568  C~2lVk      
2016 09  25.60501  03 24 38.068  +15 23 02.58  25.5w 15VT167   568  C~2lVk      
2016 09  27.50655  03 24 32.603  +15 22 37.79  25.1w 15VT167   568  C~2lVk      
2016 10  10.44325  03 23 48.237  +15 19 28.39  25.0w 15VT167   568  C~2lVk      
2016 10  10.50202  03 23 48.014  +15 19 27.36  25.4w 15VT167   568  C~2lVk      
2016 10  10.51973  03 23 47.938  +15 19 27.10  25.1w 15VT167   568  C~2lVk      
2016 10  10.53987  03 23 47.859  +15 19 26.78  25.2w 15VT167   568  C~2lVk      
2016 10  10.58850  03 23 47.658  +15 19 25.91  24.8w 15VT167   568  C~2lVk      
2016 11  02.50837  03 22 05.993  +15 12 51.72  25.0w 15VT167   568  C~2lVk      
2016 11  04.48449  03 21 56.343  +15 12 16.33  24.9w 15VT167   568  C~2lVk      
2016 12  24.31885  03 18 07.337  +14 59 59.23        15VT167   568  C~2lVk      
2017 01  02.42106  03 17 38.186  +14 58 52.26  25.1w 15VT167   568  C~2lVk      
2017 01  26.33541  03 16 55.690  +14 58 25.95  26.0w 15VT167   568  C~2lVk      
2017 09  16.63393  03 30 51.218  +15 55 02.43  25.2w 15VT167   568  C~2lVk      
2017 09  23.57295  03 30 35.808  +15 53 50.11  25.0w 15VT167   568  C~2lVk      
2017 12  13.36708  03 24 43.625  +15 33 04.92  24.9w 15VT167   568  C~2lVk      
2017 12  16.35926  03 24 30.946  +15 32 29.43  24.7w 15VT167   568  C~2lVk      

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    -0.11       0.00     0.01
     2   0.0161   -135.22     0.06     -18.24     0.10
     3   0.0844  -1189.21    -0.15     -78.12    -0.08
     4   0.0871  -1246.15     0.05     -79.65     0.03
     5   0.1690  -3260.71    -0.05     -92.23     0.11
     6   0.1691  -3263.81     0.01     -92.51    -0.23
     7   0.1692  -3266.89     0.11     -92.33    -0.10
     8   0.1777  -3495.98     0.09     -89.10     0.05
     9   0.1778  -3498.36    -0.08     -88.97     0.14
    10   0.1964  -4005.69    -0.04     -79.40    -0.05
    11   0.1966  -4009.22    -0.04     -79.23     0.02
    12   0.2485  -5362.48     0.09     -30.38    -0.12
    13   0.2675  -5809.03    -0.01      -4.70     0.07
    14   0.2676  -5812.68     0.03      -4.52     0.01
    15   0.3196  -6806.49    -0.03      83.29     0.05
    16   0.3359  -7032.56    -0.03     115.21    -0.01
    17   0.4315  -7346.06     0.04     326.36     0.02
    18   1.0047   5328.53    -0.10     498.32     0.06
    19   1.0540   4765.35    -0.04     451.27     0.01
    20   1.0593   4682.57     0.09     447.12    -0.04
    21   1.0947   4013.52     0.02     425.28     0.08
    22   1.0948   4010.13     0.12     425.10    -0.06
    23   1.0949   4009.00     0.04     425.12    -0.01
    24   1.0949   4007.82     0.05     425.10    -0.02
    25   1.0951   4004.78    -0.09     424.99    -0.07
    26   1.1578   2481.38     0.07     415.79    -0.01
    27   1.1632   2337.28    -0.04     417.04     0.06
    28   1.2997  -1057.44     0.11     554.22     0.02
    29   1.3246  -1482.80    -0.06     598.74    -0.01
    30   1.3901  -2084.41    -0.01     732.95    -0.06
    31   2.0288  10470.77     0.01     977.63    -0.02
    32   2.0478  10236.95     0.05     961.73     0.07
    33   2.2690   4994.48    -0.15    1014.32    -0.05
    34   2.2772   4808.11     0.01    1025.97     0.05

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.

15VT167    quality flag:2

Type:       SCATNEAR  SCATNEAR CLASSICAL

axisobj        50.956    50.982    50.930
ecceobj         0.200     0.200     0.199
incobj          6.200     6.200     6.200
qmin           40.155    39.970    40.178
qmax           61.199    61.335    61.168
amean          50.415    50.410    50.415
amin           49.952    49.918    49.951
amax           50.971    50.982    50.951
emean           0.191     0.192     0.191
emin            0.181     0.180     0.180
emax            0.201     0.204     0.201
imean           4.679     4.728     4.680
imin            4.449     4.362     4.448
imax            4.940     5.093     4.941
excite_mean     0.207     0.209     0.207
fracstop        1.000     1.000     1.000
cjmean          3.129     3.128     3.129

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       184.8     174.0     185.0
kozaiamp        180.0     180.0     179.9