Orbit Fit and Astrometric record for 15VH167

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: 15VH167   
# Created Sat Dec  4 02:13:40 2021
# Orbit generated from Bernstein formalism
# Fitting     36 observations of     36
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000118   0.028463  -0.000001   0.000325   0.026646   0.000000
# Chi-squared of fit:     5.06 DOF:     66 RMS:  0.07
# Min/Max residuals:    -0.18    0.24
# Exact a, adot, b, bdot, g, gdot:
  1.744784E-05  2.826108E-02 -7.385056E-08  3.233911E-04  2.659634E-02  3.441523E-03
# Covariance matrix:
  1.7439E-13 -1.0666E-14 -1.9219E-16  1.2273E-15  1.2077E-13  2.1486E-12
 -1.0666E-14  3.6086E-13 -1.3279E-15  5.9676E-15  2.1598E-13  1.0339E-11
 -1.9219E-16 -1.3279E-15  1.0047E-13 -8.0491E-14 -9.3768E-16 -5.6422E-14
  1.2273E-15  5.9676E-15 -8.0491E-14  1.0769E-13  4.6212E-15  2.4891E-13
  1.2077E-13  2.1598E-13 -9.3768E-16  4.6212E-15  2.5276E-13  8.0315E-12
  2.1486E-12  1.0339E-11 -5.6422E-14  2.4891E-13  8.0315E-12  4.3098E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -0.184683   52.101298    0.934381   -0.001096   -0.386206  2457273.129809
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:           37.68688 +/-     0.136
Argument of Peri:      295.52344 +/-     0.210
Long of Asc Node:       66.39123 +/-     0.014
Inclination:             0.67558 +/-     0.001
Eccentricity:         0.13766526 +/-    0.0006
Semi-Major Axis:     42.24117421 +/-    0.0083
Time of Perihelion: 2446772.8991 +/-      37.7
Perihelion:          36.42603189 +/-    0.0272
Aphelion:            48.05631652 +/-    0.0279
Period (y)              274.5441 +/-      0.08
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.06627110 +/-    0.0004
Ecliptic Y           29.39982650 +/-    0.0006
Ecliptic Z           -0.12118953 +/-    0.0000
Ecliptic XDOT        -0.00207984 +/-    0.0000
Ecliptic YDOT         0.00206026 +/-    0.0000
Ecliptic ZDOT         0.00003220 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   37.99407704 +/-    0.0005
Geocenter to KBO     37.59915177 +/-    0.0007
# Hcoef:  7.83

The following table shows the complete astrometric record for 15VH167. 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 (15VH167) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62902  03 18 56.855  +18 06 54.20  24.1w 15VH167   568  C~2lVi      
2015 09  12.49264  03 18 48.794  +18 06 23.05  23.4w 15VH167   568  C~2lVi      
2015 10  07.53854  03 17 32.581  +18 01 31.64  23.9w 15VH167   568  C~2lVi      
2015 10  07.59790  03 17 32.323  +18 01 30.70  23.9w 15VH167   568  C~2lVi      
2015 10  09.57780  03 17 24.146  +18 00 59.38  23.8w 15VH167   568  C~2lVi      
2015 11  07.33264  03 15 02.270  +17 51 55.06  23.7r 15VH167   568  C~2lVi      
2015 11  07.37479  03 15 02.037  +17 51 54.22  23.6r 15VH167   568  C~2lVi      
2015 11  07.41697  03 15 01.805  +17 51 53.32  23.5r 15VH167   568  C~2lVi      
2015 11  10.49950  03 14 45.065  +17 50 48.76  23.8w 15VH167   568  C~2lVi      
2015 11  17.34635  03 14 07.774  +17 48 24.99  23.8w 15VH167   568  C~2lVi      
2015 11  17.39294  03 14 07.516  +17 48 24.05  23.7w 15VH167   568  C~2lVi      
2015 12  06.35508  03 12 28.266  +17 42 00.26  23.7w 15VH167   568  C~2lVi      
2015 12  06.49265  03 12 27.572  +17 41 57.70  23.9w 15VH167   568  C~2lVi      
2016 01  01.34294  03 10 41.848  +17 35 09.17  23.9w 15VH167   568  C~2lVi      
2016 01  07.40549  03 10 24.752  +17 34 03.77  23.9w 15VH167   568  C~2lVi      
2016 01  08.25043  03 10 22.657  +17 33 55.89  23.9w 15VH167   568  C~2lVi      
2016 02  05.28189  03 09 54.920  +17 32 18.53  23.7w 15VH167   568  C~2lVi      
2016 02  10.30227  03 09 58.989  +17 32 37.18  24.0w 15VH167   568  C~2lVi      
2016 09  07.57363  03 25 29.113  +18 32 21.97        15VH167   568  C~2lVi      
2016 09  27.51061  03 24 43.183  +18 29 33.24  24.1w 15VH167   568  C~2lVi      
2016 09  29.48481  03 24 36.662  +18 29 09.25  23.8w 15VH167   568  C~2lVi      
2016 10  05.48792  03 24 14.864  +18 27 49.24  23.6w 15VH167   568  C~2lVi      
2016 10  07.49247  03 24 06.953  +18 27 20.31  23.8w 15VH167   568  C~2lVi      
2016 10  07.58817  03 24 06.539  +18 27 18.84  24.1w 15VH167   568  C~2lVi      
2016 10  09.49252  03 23 58.781  +18 26 50.24  23.7w 15VH167   568  C~2lVi      
2016 10  09.56525  03 23 58.457  +18 26 49.15  23.8w 15VH167   568  C~2lVi      
2016 11  02.50259  03 22 03.031  +18 19 43.76  23.8w 15VH167   568  C~2lVi      
2016 11  04.47870  03 21 52.476  +18 19 04.74  23.9w 15VH167   568  C~2lVi      
2016 12  24.32550  03 17 42.189  +18 03 33.50  23.8w 15VH167   568  C~2lVi      
2016 12  25.28177  03 17 38.545  +18 03 19.91        15VH167   568  C~2lVi      
2016 12  28.42845  03 17 27.048  +18 02 37.22  23.9w 15VH167   568  C~2lVi      
2017 01  02.42780  03 17 10.522  +18 01 35.92  23.9w 15VH167   568  C~2lVi      
2017 01  26.34230  03 16 24.833  +17 58 50.73  23.9w 15VH167   568  C~2lVi      
2017 01  27.27995  03 16 24.265  +17 58 48.96  24.0w 15VH167   568  C~2lVi      
2017 12  13.39064  03 25 06.257  +18 32 18.33  24.0w 15VH167   568  C~2lVi      
2017 12  13.42791  03 25 06.076  +18 32 17.65  23.9w 15VH167   568  C~2lVi      

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    -0.13       0.00     0.05
     2   0.0133   -119.07     0.09      -0.55    -0.03
     3   0.0819  -1244.31    -0.02      -1.58    -0.00
     4   0.0821  -1248.11    -0.18      -1.54     0.03
     5   0.0875  -1368.88    -0.04      -1.58    -0.03
     6   0.1662  -3465.74     0.11       0.63     0.02
     7   0.1663  -3469.17     0.10       0.69     0.05
     8   0.1664  -3472.60     0.09       0.69     0.03
     9   0.1749  -3720.25     0.02       1.10    -0.09
    10   0.1936  -4272.03     0.00       2.40    -0.01
    11   0.1937  -4275.83     0.01       2.47     0.02
    12   0.2457  -5745.57    -0.01       7.24    -0.01
    13   0.2460  -5755.82    -0.08       7.40     0.08
    14   0.3168  -7322.89     0.03      16.59     0.00
    15   0.3334  -7576.27     0.01      19.07    -0.06
    16   0.3357  -7607.29     0.01      19.52     0.05
    17   0.4125  -8016.14    -0.04      32.22     0.01
    18   0.4262  -7954.98    -0.00      34.55     0.01
    19   1.0019   5791.70    -0.06      66.38    -0.01
    20   1.0565   5116.50     0.04      65.58     0.01
    21   1.0619   5020.63     0.10      65.49    -0.05
    22   1.0783   4700.18     0.24      65.49    -0.09
    23   1.0838   4583.90     0.11      65.64     0.01
    24   1.0841   4577.83    -0.18      65.69     0.03
    25   1.0893   4463.74     0.06      65.63    -0.04
    26   1.0895   4459.00    -0.13      65.73     0.03
    27   1.1550   2761.31     0.01      67.59    -0.01
    28   1.1604   2606.00    -0.08      67.88     0.01
    29   1.2969  -1080.40    -0.02      80.66    -0.04
    30   1.2995  -1134.12    -0.04      80.98    -0.05
    31   1.3081  -1303.55    -0.00      82.20    -0.02
    32   1.3218  -1547.11    -0.02      84.10    -0.01
    33   1.3873  -2219.48     0.04      93.98    -0.02
    34   1.3899  -2227.76     0.03      94.38    -0.02
    35   2.2663   5475.72    -0.01     143.71     0.08
    36   2.2664   5473.06    -0.04     143.69     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.

15VH167    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.714    42.744    42.683
ecceobj         0.147     0.149     0.146
incobj          0.675     0.675     0.675
qmin           35.764    35.708    35.816
qmax           49.393    49.425    49.365
amean          42.329    42.329    42.329
amin           41.889    41.872    41.883
amax           42.823    42.832    42.832
emean           0.138     0.139     0.137
emin            0.121     0.122     0.119
emax            0.155     0.156     0.154
imean           1.451     1.543     1.491
imin            0.398     0.328     0.488
imax            2.309     2.216     2.406
excite_mean     0.140     0.142     0.140
fracstop        1.000     1.000     1.000
cjmean          3.059     3.058     3.059

libcent 0       181.9     179.0     180.3
libamp  0        96.1      99.9      98.4
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       176.8     179.4     185.8
kozaiamp        180.0     180.0     180.0