Orbit Fit and Astrometric record for 15VB208

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: 15VB208   
# Created Tue Nov 30 02:13:49 2021
# Orbit generated from Bernstein formalism
# Fitting     11 observations of     11
# Arc:   3.89y
# First observation: 2015/01/13
#  Last observation: 2018/12/02
Preliminary a, adot, b, bdot, g, gdot:
   0.000476   0.034173   0.000310   0.005483   0.028284   0.000000
# Chi-squared of fit:     4.71 DOF:     16 RMS:  0.12
# Min/Max residuals:    -0.17    0.31
# Exact a, adot, b, bdot, g, gdot:
  2.044755E-05  3.459469E-02  3.992585E-06  5.439271E-03  2.719767E-02  6.944580E-03
# Covariance matrix:
  1.2051E-12 -1.3075E-12 -1.1748E-13 -1.0379E-13 -5.9649E-13 -7.5284E-12
 -1.3075E-12  1.9534E-12 -8.6070E-15  1.4921E-13  4.4353E-13  1.1716E-11
 -1.1748E-13 -8.6070E-15  5.0907E-13 -1.0537E-13  3.9105E-13  1.4245E-13
 -1.0379E-13  1.4921E-13 -1.0537E-13  7.3561E-14  6.6713E-14  9.3954E-13
 -5.9649E-13  4.4353E-13  3.9105E-13  6.6713E-14  1.1194E-12  3.2514E-12
 -7.5284E-12  1.1716E-11  1.4245E-13  9.3954E-13  3.2514E-12  7.2784E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
  -34.295262   14.949654   -0.973832    0.070105    0.102430  2457035.600258
# Heliocentric elements and errors
Epoch:              2457030.5000  =  2015/01/08
Mean Anomaly:            6.35296 +/-     0.008
Argument of Peri:      250.97049 +/-     0.027
Long of Asc Node:       89.43427 +/-     0.001
Inclination:            35.64857 +/-     0.000
Eccentricity:         0.62157131 +/-    0.0003
Semi-Major Axis:     90.82251032 +/-    0.0624
Time of Perihelion: 2451451.4259 +/-       3.5
Perihelion:          34.36984390 +/-    0.0352
Aphelion:           147.27517673 +/-    0.1045
Period (y)              865.5625 +/-      0.89
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           28.97330615 +/-    0.0011
Ecliptic Y            8.74638246 +/-    0.0003
Ecliptic Z          -20.71707384 +/-    0.0008
Ecliptic XDOT        -0.00004621 +/-    0.0000
Ecliptic YDOT         0.00358786 +/-    0.0000
Ecliptic ZDOT         0.00005855 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   36.67627059 +/-    0.0010
Geocenter to KBO     36.76785492 +/-    0.0014
# Hcoef:  8.06

The following table shows the complete astrometric record for 15VB208. 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 (15VB208) followed by the observatory code and reference code for the source of the astrometry.

2015 01  13.09948  01 50 56.236  -25 36 23.34  24.6g 15VB208   W84  C~55XG      
2015 11  06.14817  02 01 52.882  -25 07 02.76  23.6i 15VB208   W84  C~55XG      
2015 11  06.14954  02 01 52.846  -25 07 02.98  24.1r 15VB208   W84  C~55XG      
2015 11  21.09974  02 00 34.194  -25 05 39.62  23.3z 15VB208   W84  C~55XG      
2015 11  21.10387  02 00 34.161  -25 05 39.93  23.3i 15VB208   W84  C~55XG      
2015 12  05.13114  01 59 31.382  -25 00 29.87  23.7r 15VB208   W84  C~55XG      
2016 11  09.28325  02 08 39.308  -23 56 46.76  23.6r 15VB208   W84  C~55XG      
2018 09  19.36104  02 26 27.352  -21 13 18.07  23.6r 15VB208   W84  C~55XG      
2018 11  26.17092  02 20 47.463  -21 34 45.67  23.5i 15VB208   W84  C~55XG      
2018 11  29.22642  02 20 33.128  -21 33 58.31  23.9r 15VB208   W84  C~55XG      
2018 12  02.19152  02 20 19.747  -21 33 03.01  24.6g 15VB208   W84  C~55XG      

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    -0.17
     2   0.8133   8784.39     0.31   -2292.05     0.05
     3   0.8133   8783.86    -0.13   -2292.03     0.03
     4   0.8542   7861.66     0.15   -1742.85     0.18
     5   0.8542   7861.12    -0.17   -1742.93    -0.07
     6   0.8926   7231.61    -0.02   -1087.54     0.05
     7   1.8239  15658.82    -0.08   -1021.80    -0.03
     8   3.6831  33582.49     0.01     725.87    -0.16
     9   3.8688  28687.53    -0.06    1869.12     0.02
    10   3.8771  28530.81     0.00    2006.58     0.10
    11   3.8853  28389.84     0.06    2144.70    -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.

15VB208    quality flag:3

Type:       SCATNEAR  SCATNEAR  SCATNEAR

axisobj        93.230    93.447    93.015
ecceobj         0.631     0.632     0.630
incobj         35.664    35.664    35.664
qmin           33.371    33.405    33.410
qmax          153.574   154.945   153.219
amean          91.555    91.992    91.382
amin           90.033    90.277    89.777
amax           93.875    94.615    93.744
emean           0.615     0.622     0.617
emin            0.596     0.604     0.601
emax            0.636     0.638     0.635
imean          34.883    34.534    34.643
imin           33.805    33.833    33.849
imax           36.116    35.662    35.688
excite_mean     0.840     0.841     0.839
fracstop        1.000     1.000     1.000
cjmean          2.584     2.583     2.584

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       241.7     278.8     250.6
kozaiamp        180.0     180.0     180.0