Orbit Fit and Astrometric record for 15VG167

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: 15VG167   
# Created Wed Dec  8 02:13:40 2021
# Orbit generated from Bernstein formalism
# Fitting     33 observations of     33
# Arc:   2.27y
# First observation: 2015/09/07
#  Last observation: 2017/12/13
Preliminary a, adot, b, bdot, g, gdot:
  -0.000078   0.027056  -0.000010   0.002170   0.026265   0.000000
# Chi-squared of fit:     3.11 DOF:     60 RMS:  0.05
# Min/Max residuals:    -0.18    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.649948E-05  2.659615E-02  9.162712E-07  2.124072E-03  2.602488E-02 -5.931090E-03
# Covariance matrix:
  1.7473E-13 -2.3653E-14 -4.1610E-16  5.2916E-15  1.1649E-13  1.3043E-12
 -2.3653E-14  3.2616E-13 -6.2400E-15  2.9499E-14  1.9083E-13  7.0853E-12
 -4.1610E-16 -6.2400E-15  1.0384E-13 -7.4847E-14 -3.9049E-15 -1.9108E-13
  5.2916E-15  2.9499E-14 -7.4847E-14  9.4497E-14  2.2631E-14  8.9161E-13
  1.1649E-13  1.9083E-13 -3.9049E-15  2.2631E-14  2.4963E-13  5.4775E-12
  1.3043E-12  7.0853E-12 -1.9108E-13  8.9161E-13  5.4775E-12  2.1403E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -1.345485   52.900834    0.939735   -0.008610   -0.372903  2457273.121609
# Heliocentric elements and errors
Epoch:              2457270.5000  =  2015/09/05
Mean Anomaly:          302.90032 +/-     0.035
Argument of Peri:       69.28921 +/-     0.017
Long of Asc Node:       67.75173 +/-     0.002
Inclination:             4.75512 +/-     0.001
Eccentricity:         0.25580940 +/-    0.0006
Semi-Major Axis:     42.34279009 +/-    0.0130
Time of Perihelion: 2473232.9223 +/-       6.3
Perihelion:          31.51110645 +/-    0.0257
Aphelion:            53.17447374 +/-    0.0289
Period (y)              275.5354 +/-      0.13
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           24.14172977 +/-    0.0005
Ecliptic Y           30.36927348 +/-    0.0006
Ecliptic Z           -0.90220828 +/-    0.0000
Ecliptic XDOT        -0.00260659 +/-    0.0000
Ecliptic YDOT         0.00118795 +/-    0.0000
Ecliptic ZDOT         0.00023810 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   38.80631222 +/-    0.0005
Geocenter to KBO     38.42476786 +/-    0.0007
# Hcoef:  7.99

The following table shows the complete astrometric record for 15VG167. 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 (15VG167) followed by the observatory code and reference code for the source of the astrometry.

2015 09  07.62082  03 23 25.897  +17 11 43.86  24.1w 15VG167   568  C~2lVi      
2015 09  12.48448  03 23 18.266  +17 11 11.59  24.1w 15VG167   568  C~2lVi      
2015 10  07.52687  03 22 04.776  +17 06 25.30  23.7w 15VG167   568  C~2lVi      
2015 10  07.58621  03 22 04.535  +17 06 24.43  23.9w 15VG167   568  C~2lVi      
2015 10  09.56611  03 21 56.573  +17 05 54.36  24.3w 15VG167   568  C~2lVi      
2015 11  06.33883  03 19 42.742  +16 57 40.21  24.0r 15VG167   568  C~2lVi      
2015 11  06.40946  03 19 42.372  +16 57 39.01  24.1r 15VG167   568  C~2lVi      
2015 11  06.47899  03 19 41.988  +16 57 37.60  23.3r 15VG167   568  C~2lVi      
2015 11  07.49597  03 19 36.567  +16 57 18.00  24.1w 15VG167   568  C~2lVi      
2015 11  17.47779  03 18 42.873  +16 54 05.14  24.0w 15VG167   568  C~2lVi      
2015 11  17.56554  03 18 42.399  +16 54 03.27  23.8w 15VG167   568  C~2lVi      
2015 12  06.34344  03 17 04.542  +16 48 20.80  24.3w 15VG167   568  C~2lVi      
2015 12  06.48092  03 17 03.851  +16 48 18.53  23.7w 15VG167   568  C~2lVi      
2015 12  31.36453  03 15 19.779  +16 42 38.35  24.6w 15VG167   568  C~2lVi      
2016 02  05.29346  03 14 24.237  +16 40 57.43  24.0w 15VG167   568  C~2lVi      
2016 02  11.24684  03 14 28.143  +16 41 32.75  24.0w 15VG167   568  C~2lVi      
2016 09  07.59099  03 29 30.680  +17 41 30.56  23.9w 15VG167   568  C~2lVi      
2016 09  27.52301  03 28 46.277  +17 38 41.85  23.9w 15VG167   568  C~2lVi      
2016 10  05.50531  03 28 18.547  +17 37 00.63  24.5w 15VG167   568  C~2lVi      
2016 10  07.50982  03 28 10.801  +17 36 32.67  24.0w 15VG167   568  C~2lVi      
2016 10  07.60551  03 28 10.408  +17 36 31.20  24.4w 15VG167   568  C~2lVi      
2016 10  09.51019  03 28 02.780  +17 36 03.75  24.3w 15VG167   568  C~2lVi      
2016 10  09.58259  03 28 02.477  +17 36 02.55  23.9w 15VG167   568  C~2lVi      
2016 11  02.49681  03 26 08.620  +17 29 19.00  23.9w 15VG167   568  C~2lVi      
2016 11  04.47292  03 25 58.155  +17 28 42.48  24.0w 15VG167   568  C~2lVi      
2016 12  28.46047  03 21 31.089  +17 13 52.67  24.7w 15VG167   568  C~2lVi      
2016 12  29.39076  03 21 27.765  +17 13 42.61  23.9w 15VG167   568  C~2lVi      
2017 01  27.29772  03 20 24.436  +17 11 10.54  23.9w 15VG167   568  C~2lVi      
2017 01  27.30287  03 20 24.430  +17 11 10.45  23.8w 15VG167   568  C~2lVi      
2017 09  16.60340  03 35 29.126  +18 10 08.95  24.2w 15VG167   568  C~2lVi      
2017 09  23.54254  03 35 12.953  +18 09 11.41  23.7w 15VG167   568  C~2lVi      
2017 12  13.37172  03 28 48.301  +17 47 50.37  24.5w 15VG167   568  C~2lVi      
2017 12  13.40930  03 28 48.110  +17 47 49.74  24.2w 15VG167   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    -0.07       0.00     0.08
     2   0.0133   -113.95    -0.07      -3.76     0.03
     3   0.0819  -1205.47    -0.01     -15.27    -0.01
     4   0.0820  -1209.03    -0.01     -15.24     0.02
     5   0.0875  -1327.08     0.02     -15.46     0.03
     6   0.1635  -3309.35    -0.07      -5.05    -0.07
     7   0.1637  -3314.79     0.13      -4.85     0.03
     8   0.1639  -3320.48     0.01      -4.80    -0.01
     9   0.1667  -3400.70    -0.01      -3.85     0.01
    10   0.1940  -4195.18     0.01       7.34    -0.00
    11   0.1942  -4202.23     0.04       7.28    -0.18
    12   0.2456  -5648.67     0.03      38.87    -0.00
    13   0.2460  -5658.85     0.01      39.25     0.07
    14   0.3142  -7192.16    -0.05      99.57    -0.07
    15   0.4125  -7989.85    -0.06     211.09     0.10
    16   0.4288  -7926.33     0.04     230.47     0.01
    17   1.0020   5501.11     0.03     440.19     0.06
    18   1.0565   4844.09     0.01     431.36    -0.06
    19   1.0784   4434.75    -0.01     430.21    -0.05
    20   1.0839   4320.48     0.03     430.24     0.02
    21   1.0841   4314.67    -0.09     430.20    -0.05
    22   1.0894   4202.16     0.04     430.33     0.04
    23   1.0896   4197.66    -0.00     430.23    -0.08
    24   1.1550   2519.57     0.02     440.59     0.02
    25   1.1604   2365.45     0.06     442.31     0.07
    26   1.3083  -1559.27    -0.05     539.78     0.07
    27   1.3108  -1607.89    -0.05     542.13    -0.03
    28   1.3899  -2524.25     0.09     625.81     0.02
    29   1.3900  -2524.35     0.04     625.75    -0.06
    30   2.0260  10888.19    -0.01     883.66    -0.01
    31   2.0450  10649.96     0.08     882.08     0.00
    32   2.2663   5006.29    -0.01     956.35     0.03
    33   2.2664   5003.49    -0.12     956.40    -0.00

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.

15VG167    quality flag:3

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

axisobj        42.676    42.706    42.645
ecceobj         0.253     0.254     0.251
incobj          4.743     4.743     4.743
qmin           31.066    31.040    31.108
qmax           54.114    54.113    54.033
amean          42.326    42.326    42.326
amin           41.936    41.877    41.953
amax           42.809    42.830    42.789
emean           0.252     0.252     0.251
emin            0.240     0.239     0.239
emax            0.265     0.265     0.264
imean           3.565     3.786     3.507
imin            3.252     3.236     3.254
imax            3.856     4.228     3.754
excite_mean     0.260     0.260     0.259
fracstop        1.000     1.000     1.000
cjmean          3.002     3.001     3.002

libcent 0       179.4     180.3     180.0
libamp  0        37.4      54.7      19.7
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       162.1     101.5     207.0
kozaiamp        180.0     180.0     180.0