Orbit Fit and Astrometric record for 13VY71

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: 13VY71    
# Created Sat Dec  4 02:12:20 2021
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     15 observations of     15
# Arc:   5.01y
# First observation: 2013/09/09
#  Last observation: 2018/09/14
# Chi-squared of fit:     7.49 DOF:     24 RMS:  0.12
# Min/Max residuals:    -0.25    0.26
# Exact a, adot, b, bdot, g, gdot:
  1.894662E-05  3.528752E-02  2.660402E-06  4.029377E-03  3.058485E-02 -1.189137E-03
# Covariance matrix:
  5.9046E-13 -9.7209E-14 -5.5825E-15  4.2089E-15  4.5446E-13  2.1031E-13
 -9.7209E-14  3.1961E-13 -1.5690E-14  3.6234E-14  1.5928E-13  1.9095E-12
 -5.5825E-15 -1.5690E-14  2.4605E-13 -6.6558E-14 -1.8725E-14 -1.1188E-13
  4.2089E-15  3.6234E-14 -6.6558E-14  3.2706E-14  3.1240E-14  2.4757E-13
  4.5446E-13  1.5928E-13 -1.8725E-14  3.1240E-14  7.3994E-13  1.6304E-12
  2.1031E-13  1.9095E-12 -1.1188E-13  2.4757E-13  1.6304E-12  1.3032E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
   -8.703856   11.871577    0.432541   -0.137699   -0.900104  2456544.806828
# Heliocentric elements and errors
Epoch:              2456544.5000  =  2013/09/09
Mean Anomaly:          345.17631 +/-     0.029
Argument of Peri:      327.28855 +/-     0.040
Long of Asc Node:       63.82547 +/-     0.001
Inclination:            10.60155 +/-     0.000
Eccentricity:         0.15647443 +/-    0.0001
Semi-Major Axis:     39.49206140 +/-    0.0053
Time of Perihelion: 2460277.1485 +/-      19.1
Perihelion:          33.31256373 +/-    0.0060
Aphelion:            45.67155906 +/-    0.0073
Period (y)              248.1835 +/-      0.05
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X           32.60779629 +/-    0.0009
Ecliptic Y            6.41581801 +/-    0.0002
Ecliptic Z           -4.94772202 +/-    0.0001
Ecliptic XDOT        -0.00070556 +/-    0.0000
Ecliptic YDOT         0.00307968 +/-    0.0000
Ecliptic ZDOT         0.00037279 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   33.59930011 +/-    0.0009
Geocenter to KBO     32.69597970 +/-    0.0009
# Hcoef:  8.15

The following table shows the complete astrometric record for 13VY71. 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 (13VY71) followed by the observatory code and reference code for the source of the astrometry.

2013 09  09.30605  00 57 14.563  -03 19 20.22  24.1g 13VY71    W84  C~55OH      
2013 10  02.28661  00 55 15.465  -03 32 30.07  24.0g 13VY71    W84  C~55OH      
2013 11  05.03575  00 52 16.39   -03 47 27.0   23.7r 13VY71    W84  C~55OH      
2013 11  05.07412  00 52 16.21   -03 47 27.6         13VY71    W84  C~55OH      
2013 11  05.16850  00 52 15.75   -03 47 29.3         13VY71    W84  C~55OH      
2014 11  15.02399  00 58 37.603  -02 50 08.28  22.5r 13VY71    W84  C~55OH      
2014 11  16.15773  00 58 32.848  -02 50 22.60  23.1r 13VY71    W84  C~55OH      
2016 08  25.39991  01 19 29.173  -00 10 44.95  23.3z 13VY71    W84  C~55OH      
2016 11  05.18380  01 13 31.795  -00 46 55.10  23.2i 13VY71    W84  C~55OH      
2016 11  05.18518  01 13 31.805  -00 46 55.03  23.5r 13VY71    W84  C~55OH      
2017 08  22.41422  01 26 43.539  +00 51 03.06  23.3i 13VY71    W84  C~55OH      
2017 08  28.38611  01 26 25.270  +00 48 22.28  23.4i 13VY71    W84  C~55OI      
2017 09  14.33056  01 25 17.560  +00 39 47.92  22.6z 13VY71    W84  C~55OI      
2018 09  14.35798  01 32 26.871  +01 40 43.00  23.6i 13VY71    W84  C~55OI      
2018 09  14.35934  01 32 26.873  +01 40 42.55  23.3r 13VY71    W84  C~55OI      

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    -0.09       0.00    -0.17
     2   0.0629      0.00     0.10       0.00     0.14
     3   0.1553      0.00    -0.06       0.00    -0.11
     4   0.1554      0.00     0.01       0.00    -0.02
     5   0.1557      0.00    -0.09       0.00    -0.03
     6   1.1820      0.00     0.26       0.00     0.24
     7   1.1851      0.00     0.04       0.00     0.05
     8   2.9599      0.00    -0.11       0.00     0.01
     9   3.1564      0.00    -0.25       0.00    -0.07
    10   3.1564      0.00     0.01       0.00     0.03
    11   3.9510      0.00     0.11       0.00     0.14
    12   3.9674      0.00     0.11       0.00    -0.04
    13   4.0138      0.00     0.05       0.00    -0.12
    14   5.0131      0.00    -0.06       0.00     0.20
    15   5.0132      0.00     0.06       0.00    -0.21

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.

13VY71    quality flag:3

Type:           3:2E      3:2E      3:2E

axisobj        39.707    39.707    39.707
ecceobj         0.160     0.160     0.160
incobj         10.603    10.603    10.603
qmin           32.751    32.751    32.750
qmax           46.776    46.775    46.792
amean          39.458    39.458    39.458
amin           38.967    38.967    38.967
amax           40.008    40.008    40.008
emean           0.151     0.151     0.151
emin            0.131     0.131     0.131
emax            0.170     0.169     0.171
imean           8.817     8.817     8.817
imin            8.117     8.117     8.117
imax            9.671     9.671     9.670
excite_mean     0.215     0.215     0.215
fracstop        1.000     1.000     1.000
cjmean          3.000     3.000     3.000

libcent 0       180.0     180.1     179.9
libamp  0       115.2     115.3     115.1
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       181.7     181.7     181.8
kozaiamp        179.9     179.9     179.9