Orbit Fit and Astrometric record for 15VQ207

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: 15VQ207   
# Created Fri Mar 29 01:18:35 2024
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     15 observations of     15
# Arc:   9.20y
# First observation: 2014/09/25
#  Last observation: 2023/12/07
# Chi-squared of fit:     9.82 DOF:     24 RMS:  0.14
# Min/Max residuals:    -0.32    0.27
# Exact a, adot, b, bdot, g, gdot:
  2.287715E-05  4.772267E-02 -6.488448E-06 -1.196970E-02  3.279824E-02  9.230524E-04
# Covariance matrix:
  5.3903E-13 -2.5197E-13 -7.6217E-14  5.1832E-14  3.0065E-14 -4.7928E-13
 -2.5197E-13  1.7943E-13  5.1136E-14 -4.2035E-14  8.0989E-14  3.5028E-13
 -7.6217E-14  5.1136E-14  2.4745E-13 -4.8875E-14 -1.6211E-14  1.1611E-13
  5.1832E-14 -4.2035E-14 -4.8875E-14  2.0831E-14 -2.6262E-14 -8.5521E-14
  3.0065E-14  8.0989E-14 -1.6211E-14 -2.6262E-14  5.2599E-13  4.5578E-14
 -4.7928E-13  3.5028E-13  1.1611E-13 -8.5521E-14  4.5578E-14  7.5610E-13
#      lat0       lon0       xBary       yBary       zBary        JD0
  -25.901595   -3.124168   -0.085920   -0.437446   -0.901167  2456925.708408
# Heliocentric elements and errors
Epoch:              2456926.5000  =  2014/09/26
Mean Anomaly:            0.16515 +/-     0.000
Argument of Peri:      240.36568 +/-     0.002
Long of Asc Node:      117.60370 +/-     0.000
Inclination:            28.54944 +/-     0.000
Eccentricity:         0.78636019 +/-    0.0001
Semi-Major Axis:    146.88747329 +/-    0.0809
Time of Perihelion: 2456628.2008 +/-       0.4
Perihelion:          31.38101145 +/-    0.0240
Aphelion:           262.39393514 +/-    0.1455
Period (y)             1780.2678 +/-      1.47
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.38833376 +/-    0.0006
Ecliptic Y           -1.46151529 +/-    0.0000
Ecliptic Z          -13.31880736 +/-    0.0003
Ecliptic XDOT        -0.00015415 +/-    0.0000
Ecliptic YDOT         0.00399317 +/-    0.0000
Ecliptic ZDOT        -0.00093235 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   31.39145389 +/-    0.0006
Geocenter to KBO     30.48946904 +/-    0.0007
# Hcoef:  8.83

The following table shows the complete astrometric record for 15VQ207. 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 (15VQ207) followed by the observatory code and reference code for the source of the astrometry.

2014 09  25.20763  00 32 38.192  -24 51 08.59  23.5i 15VQ207   W84  C~55XF      
2014 09  25.21045  00 32 38.174  -24 51 08.84  23.6r 15VQ207   W84  C~55XF      
2015 11  05.08427  00 40 57.354  -24 29 07.92  24.1r 15VQ207   W84  C~55XF      
2015 12  05.14552  00 39 17.765  -24 19 24.67  24.1g 15VQ207   W84  C~55XF      
2016 08  16.34974  00 59 31.960  -22 59 10.04  23.9i 15VQ207   W84  C~55XF      
2016 10  28.14083  00 53 26.002  -23 50 10.95  24.2g 15VQ207   W84  C~55XF      
2017 09  26.24014  01 08 12.265  -22 53 05.54  23.5i 15VQ207   W84  C~55XF      
2017 09  26.24153  01 08 12.264  -22 53 05.34  23.4r 15VQ207   W84  C~55XF      
2017 09  26.24920  01 08 12.191  -22 53 05.96  24.3g 15VQ207   W84  C~55XF      
2017 11  23.07726  01 03 08.225  -23 06 35.11  23.1r 15VQ207   W84  C~55XF      
2017 11  26.07464  01 02 57.751  -23 05 31.23  24.0i 15VQ207   W84  C~55XF      
2017 12  07.09166  01 02 27.316  -23 00 08.97  24.8g 15VQ207   W84  C~55XF      
2023 12  07.085470 02 07 11.597  -18 08 27.43  24.2G 15VQ207   G37  C~7dK1      
2023 12  07.136110 02 07 11.355  -18 08 26.29        15VQ207   G37  C~7dK1      
2023 12  07.188000 02 07 11.166  -18 08 25.35        15VQ207   G37  C~7dK1      

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    -0.04       0.00     0.14
     2   0.0000      0.00    -0.06       0.00     0.01
     3   1.1112      0.00     0.10       0.00     0.07
     4   1.1935      0.00     0.01       0.00     0.13
     5   1.8922      0.00     0.04       0.00     0.13
     6   2.0915      0.00    -0.05       0.00     0.02
     7   3.0035      0.00     0.12       0.00    -0.28
     8   3.0035      0.00     0.22       0.00    -0.02
     9   3.0035      0.00    -0.22       0.00    -0.30
    10   3.1619      0.00    -0.05       0.00     0.03
    11   3.1701      0.00     0.13       0.00     0.00
    12   3.2002      0.00    -0.02       0.00    -0.05
    13   9.1988      0.00     0.27       0.00     0.08
    14   9.1990      0.00    -0.32       0.00     0.13
    15   9.1991      0.00    -0.04       0.00    -0.06

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.

15VQ207    quality flag:3

Type:       CENTAURS  CENTAURS  CENTAURS

axisobj       152.778   152.775   152.782
ecceobj         0.795     0.795     0.795
incobj         28.537    28.537    28.537
qmin           29.855    29.762    29.673
qmax          276.376   282.701   281.777
amean         143.558   145.167   147.583
amin          137.833   139.902   140.967
amax          153.881   157.493   156.359
emean           0.782     0.784     0.788
emin            0.770     0.771     0.770
emax            0.796     0.796     0.802
imean          26.769    26.872    26.865
imin           26.250    26.102    25.975
imax           28.107    28.721    28.591
excite_mean     0.903     0.905     0.908
fracstop        1.000     1.000     1.000
cjmean          2.639     2.639     2.637

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       278.7     285.3     282.2
kozaiamp         40.6      45.7      40.9