Orbit Fit and Astrometric record for 15VT207

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: 15VT207   
# Created Thu Dec  9 02:13:43 2021
# Orbit generated from Bernstein formalism
# Fitting     10 observations of     10
# Arc:   4.01y
# First observation: 2014/11/27
#  Last observation: 2018/12/02
Preliminary a, adot, b, bdot, g, gdot:
  -0.000058   0.032321   0.000135  -0.006008   0.029429   0.000000
# Chi-squared of fit:     2.56 DOF:     14 RMS:  0.09
# Min/Max residuals:    -0.18    0.19
# Exact a, adot, b, bdot, g, gdot:
  1.838035E-05  3.233141E-02 -3.516368E-06 -5.967223E-03  2.761681E-02  8.187060E-04
# Covariance matrix:
  1.1989E-12 -1.3251E-12 -1.8624E-13  2.3032E-13 -7.7684E-13 -8.0951E-12
 -1.3251E-12  1.8794E-12  2.7218E-13 -3.4858E-13  1.0455E-12  1.2247E-11
 -1.8624E-13  2.7218E-13  4.5688E-13 -1.8661E-13  2.5413E-13  1.8819E-12
  2.3032E-13 -3.4858E-13 -1.8661E-13  1.3480E-13 -2.1479E-13 -2.3620E-12
 -7.7684E-13  1.0455E-12  2.5413E-13 -2.1479E-13  1.8064E-12  7.5896E-12
 -8.0951E-12  1.2247E-11  1.8819E-12 -2.3620E-12  7.5896E-12  8.3003E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -36.716033   -1.384431   -0.900700   -0.241271   -0.323834  2456988.685058
# Heliocentric elements and errors
Epoch:              2456980.5000  =  2014/11/19
Mean Anomaly:            5.64660 +/-     0.032
Argument of Peri:      246.01414 +/-     0.066
Long of Asc Node:      106.13198 +/-     0.001
Inclination:            37.38093 +/-     0.000
Eccentricity:         0.31219280 +/-    0.0002
Semi-Major Axis:     52.88315834 +/-    0.0140
Time of Perihelion: 2454777.2731 +/-      12.6
Perihelion:          36.37341705 +/-    0.0129
Aphelion:            69.39289963 +/-    0.0202
Period (y)              384.5779 +/-      0.15
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           29.44034855 +/-    0.0014
Ecliptic Y            0.19109577 +/-    0.0000
Ecliptic Z          -21.64819565 +/-    0.0011
Ecliptic XDOT        -0.00021529 +/-    0.0000
Ecliptic YDOT         0.00320625 +/-    0.0000
Ecliptic ZDOT        -0.00052263 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.54333066 +/-    0.0013
Geocenter to KBO     36.20983042 +/-    0.0018
# Hcoef:  8.00

The following table shows the complete astrometric record for 15VT207. 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 (15VT207) followed by the observatory code and reference code for the source of the astrometry.

2014 11  27.18428  01 01 24.936  -33 47 41.24  24.1g 15VT207   W84  C~55XF      
2015 11  07.17980  01 11 28.341  -33 18 43.42  23.5i 15VT207   W84  C~55XF      
2015 11  08.10848  01 11 23.527  -33 18 34.99  23.4r 15VT207   W84  C~55XF      
2015 11  08.10986  01 11 23.521  -33 18 35.16  24.2g 15VT207   W84  C~55XF      
2015 11  30.19352  01 09 47.356  -33 10 01.45  22.6z 15VT207   W84  C~55XF      
2015 12  01.15503  01 09 44.127  -33 09 26.26  23.3r 15VT207   W84  C~55XF      
2017 11  24.20883  01 26 46.202  -31 54 38.55  24.7g 15VT207   W84  C~55XF      
2018 09  10.38836  01 41 31.678  -30 48 59.43  24.4g 15VT207   W84  C~55XF      
2018 12  02.06328  01 34 20.959  -31 08 56.76  23.9r 15VT207   W84  C~55XF      
2018 12  02.06465  01 34 20.952  -31 08 56.51  24.7g 15VT207   W84  C~55XF      

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     0.03       0.00     0.02
     2   0.9445   7432.22     0.06   -2174.91     0.19
     3   0.9471   7384.08    -0.03   -2137.42     0.01
     4   0.9471   7383.93    -0.11   -2137.53    -0.16
     5   1.0076   6592.22     0.05   -1090.63    -0.05
     6   1.0102   6574.45    -0.02   -1039.93     0.04
     7   2.9925  20031.46     0.03   -3836.83    -0.18
     8   3.7870  31883.94    -0.01   -6754.40    -0.06
     9   4.0134  26491.76    -0.05   -4664.19    -0.00
    10   4.0134  26491.82     0.05   -4663.93     0.18

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.

15VT207    quality flag:2

Type:       SCATNEAR  SCATNEAR   7:3EEEE

axisobj        53.541    53.584    53.498
ecceobj         0.321     0.321     0.320
incobj         37.383    37.383    37.383
qmin           35.349    35.460    33.974
qmax           71.543    71.631    72.753
amean          53.019    53.148    52.967
amin           52.319    52.618    52.354
amax           53.783    53.820    53.740
emean           0.304     0.308     0.327
emin            0.273     0.282     0.298
emax            0.332     0.331     0.358
imean          35.985    35.940    35.341
imin           35.320    35.418    34.408
imax           36.829    36.637    36.097
excite_mean     0.662     0.663     0.665
fracstop        1.000     1.000     1.000
cjmean          2.614     2.614     2.614

libcent 0      -180.0    -180.0     179.1
libamp  0      -180.0    -180.0     166.5
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       187.3     204.1     184.4
kozaiamp        180.0     179.8     180.0