Orbit Fit and Astrometric record for 15VH168

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: 15VH168   
# Created Mon Dec  6 02:13:39 2021
# Orbit generated from Bernstein formalism
# Fitting     35 observations of     35
# Arc:   3.08y
# First observation: 2014/11/17
#  Last observation: 2017/12/16
Preliminary a, adot, b, bdot, g, gdot:
  -0.000051   0.031235  -0.000006  -0.008867   0.027960   0.000000
# Chi-squared of fit:     2.24 DOF:     64 RMS:  0.04
# Min/Max residuals:    -0.15    0.23
# Exact a, adot, b, bdot, g, gdot:
  1.766059E-05  3.143325E-02 -4.838124E-06 -8.936388E-03  2.811203E-02  8.242462E-04
# Covariance matrix:
  2.6613E-13 -2.6280E-13 -2.0072E-14  4.8404E-14 -1.2918E-13 -1.9537E-12
 -2.6280E-13  4.4641E-13  4.6233E-14 -1.1128E-13  1.8393E-13  4.5030E-12
 -2.0072E-14  4.6233E-14  1.7167E-13 -9.6551E-14  1.8711E-14  5.4131E-13
  4.8404E-14 -1.1128E-13 -9.6551E-14  8.8126E-14 -4.5270E-14 -1.3024E-12
 -1.2918E-13  1.8393E-13  1.8711E-14 -4.5270E-14  2.0087E-13  1.8191E-12
 -1.9537E-12  4.5030E-12  5.4131E-13 -1.3024E-12  1.8191E-12  5.2732E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.039742   46.303748   -0.141002   -0.000530   -0.979374  2456978.812878
# Heliocentric elements and errors
Epoch:              2456970.5000  =  2014/11/09
Mean Anomaly:            4.40312 +/-     0.035
Argument of Peri:      172.47853 +/-     0.062
Long of Asc Node:      226.39287 +/-     0.000
Inclination:            15.87175 +/-     0.000
Eccentricity:         0.25286649 +/-    0.0001
Semi-Major Axis:     48.83286331 +/-    0.0039
Time of Perihelion: 2455446.0091 +/-      12.3
Perihelion:          36.48466833 +/-    0.0045
Aphelion:            61.18105828 +/-    0.0060
Period (y)              341.2530 +/-      0.04
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           25.14588163 +/-    0.0004
Ecliptic Y           26.52598459 +/-    0.0004
Ecliptic Z           -0.02486303 +/-    0.0000
Ecliptic XDOT        -0.00216260 +/-    0.0000
Ecliptic YDOT         0.00216749 +/-    0.0000
Ecliptic ZDOT        -0.00087027 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.55056552 +/-    0.0004
Geocenter to KBO     35.57195833 +/-    0.0006
# Hcoef:  7.31

The following table shows the complete astrometric record for 15VH168. 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 (15VH168) followed by the observatory code and reference code for the source of the astrometry.

2014 11  17.31210  02 55 23.808  +16 40 34.04  22.8r 15VH168   568  C~2lVm      
2014 11  17.42105  02 55 23.211  +16 40 31.01  22.8r 15VH168   568  C~2lVm      
2014 11  17.53510  02 55 22.595  +16 40 27.70  22.7r 15VH168   568  C~2lVm      
2014 11  19.33265  02 55 13.018  +16 39 37.03  22.9r 15VH168   568  C~2lVm      
2014 11  23.43547  02 54 51.398  +16 37 42.35  22.8r 15VH168   568  C~2lVm      
2015 08  11.60566  03 08 14.628  +17 11 25.71  23.1w 15VH168   568  C~2lVm      
2015 09  06.63576  03 08 12.071  +17 08 43.79        15VH168   568  C~2lVm      
2015 09  12.52541  03 08 01.592  +17 07 26.73  23.1w 15VH168   568  C~2lVm      
2015 10  07.46582  03 06 41.590  +16 59 37.85  23.0w 15VH168   568  C~2lVm      
2015 10  08.47003  03 06 37.326  +16 59 14.79  23.0w 15VH168   568  C~2lVm      
2015 10  08.52822  03 06 37.072  +16 59 13.53  23.0w 15VH168   568  C~2lVm      
2015 11  06.28626  03 04 13.585  +16 46 46.63  23.0r 15VH168   568  C~2lVm      
2015 11  06.34963  03 04 13.236  +16 46 44.84  22.9r 15VH168   568  C~2lVm      
2015 11  06.42017  03 04 12.848  +16 46 43.00  22.9r 15VH168   568  C~2lVm      
2015 11  06.48956  03 04 12.465  +16 46 41.00  22.9r 15VH168   568  C~2lVm      
2016 09  07.55628  03 15 50.190  +17 07 32.25        15VH168   568  C~2lVm      
2016 09  26.61279  03 15 04.322  +17 02 29.44  23.2w 15VH168   568  C~2lVm      
2016 10  10.42589  03 14 11.242  +16 57 35.20  23.2w 15VH168   568  C~2lVm      
2016 10  10.48430  03 14 10.980  +16 57 33.86  23.3w 15VH168   568  C~2lVm      
2016 10  10.50790  03 14 10.874  +16 57 33.29  23.2w 15VH168   568  C~2lVm      
2016 10  27.51417  03 12 48.883  +16 50 30.16  23.1w 15VH168   568  C~2lVm      
2016 10  27.52577  03 12 48.821  +16 50 29.91  23.0w 15VH168   568  C~2lVm      
2016 11  03.53920  03 12 11.599  +16 47 23.58  23.1w 15VH168   568  C~2lVm      
2016 11  03.55078  03 12 11.531  +16 47 23.23  23.0w 15VH168   568  C~2lVm      
2016 12  28.39306  03 07 46.606  +16 25 31.36  23.8w 15VH168   568  C~2lVm      
2016 12  28.40104  03 07 46.579  +16 25 31.22  23.5w 15VH168   568  C~2lVm      
2016 12  29.35861  03 07 43.497  +16 25 15.15  23.1w 15VH168   568  C~2lVm      
2016 12  29.36878  03 07 43.463  +16 25 14.99  23.1w 15VH168   568  C~2lVm      
2017 01  01.25561  03 07 34.681  +16 24 28.87  23.2w 15VH168   568  C~2lVm      
2017 01  01.26608  03 07 34.647  +16 24 28.71  23.2w 15VH168   568  C~2lVm      
2017 01  02.37586  03 07 31.466  +16 24 11.86  23.2w 15VH168   568  C~2lVm      
2017 01  26.27054  03 06 53.862  +16 20 19.56  23.2w 15VH168   568  C~2lVm      
2017 09  23.54857  03 22 56.190  +17 01 40.00        15VH168   568  C~2lVm      
2017 12  16.38250  03 16 15.811  +16 28 33.07  23.0w 15VH168   568  C~2lVm      
2017 12  16.38715  03 16 15.791  +16 28 32.99  23.0w 15VH168   568  C~2lVm      

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     0.00       0.00    -0.04
     2   0.0003     -9.09    -0.02      -0.44     0.02
     3   0.0006    -18.52     0.03      -1.07    -0.06
     4   0.0055   -164.89     0.03     -10.12    -0.01
     5   0.0168   -495.45    -0.01     -30.70    -0.04
     6   0.7318  11149.13     0.01   -1310.00     0.02
     7   0.8031  11069.73    -0.15   -1456.11     0.23
     8   0.8192  10903.78    -0.01   -1489.54    -0.00
     9   0.8875   9669.15     0.01   -1628.24    -0.02
    10   0.8902   9603.86    -0.02   -1633.70    -0.01
    11   0.8904   9600.01     0.01   -1633.92     0.07
    12   0.9691   7410.74    -0.02   -1786.01    -0.01
    13   0.9693   7405.42    -0.03   -1786.34    -0.06
    14   0.9695   7399.55     0.02   -1786.57     0.04
    15   0.9697   7393.70     0.01   -1786.97    -0.04
    16   1.8077  17411.48     0.03   -3282.90     0.01
    17   1.8598  16692.51     0.10   -3402.48     0.01
    18   1.8976  15875.36     0.04   -3485.45     0.00
    19   1.8978  15871.36     0.01   -3485.75     0.02
    20   1.8979  15869.73    -0.01   -3485.90    -0.00
    21   1.9444  14616.00     0.03   -3581.66    -0.01
    22   1.9445  14615.07     0.04   -3581.66     0.04
    23   1.9637  14047.51     0.06   -3618.76     0.01
    24   1.9637  14046.47    -0.01   -3618.84    -0.01
    25   2.1138  10011.43    -0.01   -3854.90    -0.01
    26   2.1139  10011.02    -0.01   -3854.93    -0.02
    27   2.1165   9963.86    -0.01   -3858.31    -0.06
    28   2.1165   9963.34    -0.02   -3858.33    -0.04
    29   2.1244   9828.87     0.01   -3868.26    -0.01
    30   2.1244   9828.35    -0.03   -3868.28    -0.00
    31   2.1275   9779.61    -0.01   -3872.01     0.01
    32   2.1929   9194.26    -0.00   -3947.73    -0.03
    33   2.8508  23283.01    -0.10   -5212.90     0.02
    34   3.0803  17154.21    -0.00   -5645.93    -0.01
    35   3.0803  17153.91     0.01   -5645.93     0.01

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.

15VH168    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        49.328    49.342    49.313
ecceobj         0.260     0.261     0.260
incobj         15.830    15.830    15.830
qmin           35.205    35.227    35.304
qmax           62.929    63.101    62.874
amean          48.781    48.806    48.783
amin           48.303    48.354    48.308
amax           49.336    49.397    49.319
emean           0.259     0.259     0.259
emin            0.243     0.243     0.244
emax            0.276     0.277     0.275
imean          16.625    16.635    16.642
imin           16.047    16.093    16.129
imax           17.293    17.304    17.297
excite_mean     0.386     0.386     0.386
fracstop        1.000     1.000     1.000
cjmean          2.973     2.973     2.973

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       191.2     191.0     190.3
kozaiamp        180.0     179.9     179.9