Orbit Fit and Astrometric record for 15HY195

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: 15HY195   
# Created Sat Feb 22 02:10:27 2025
# Orbit generated by ELGB
# -->Covariance matrix from a Bernstein fit
# Fitting     12 observations of     12
# Arc:   7.05y
# First observation: 2014/04/30
#  Last observation: 2021/05/16
# Chi-squared of fit:     1.72 DOF:     18 RMS:  0.07
# Min/Max residuals:    -0.16    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.219216E-05  1.524136E-02  4.880110E-06  6.133692E-03  1.889192E-02  8.146133E-03
# Covariance matrix:
  3.4358E-13 -3.6461E-13  5.3590E-14 -1.3761E-13 -1.0886E-13 -3.2028E-12
 -3.6461E-13  2.8391E-12 -6.1937E-13  1.5920E-12 -2.1620E-11  3.7076E-11
  5.3590E-14 -6.1937E-13  3.5413E-13 -3.9340E-13  5.2865E-12 -8.3618E-12
 -1.3761E-13  1.5920E-12 -3.9340E-13  9.3648E-13 -1.3593E-11  2.1495E-11
 -1.0886E-13 -2.1620E-11  5.2865E-12 -1.3593E-11  2.4217E-10 -3.1660E-10
 -3.2028E-12  3.7076E-11 -8.3618E-12  2.1495E-11 -3.1660E-10  5.0061E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
   -2.368338 -145.434264   -0.087495   -0.041352   -1.002527  2456777.521238
# Heliocentric elements and errors
Epoch:              2456778.5000  =  2014/05/01
Mean Anomaly:           31.36161 +/-     0.358
Argument of Peri:      267.27735 +/-     0.285
Long of Asc Node:      220.40738 +/-     0.000
Inclination:            22.04950 +/-     0.001
Eccentricity:         0.51740070 +/-    0.0028
Semi-Major Axis:     75.96470082 +/-    0.5635
Time of Perihelion: 2435711.0448 +/-     335.9
Perihelion:          36.66051148 +/-    0.3464
Aphelion:           115.26889015 +/-    0.8816
Period (y)              662.1036 +/-      7.37
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -44.32947586 +/-    0.0359
Ecliptic Y          -30.64570310 +/-    0.0247
Ecliptic Z           -2.18710877 +/-    0.0018
Ecliptic XDOT         0.00024619 +/-    0.0000
Ecliptic YDOT        -0.00251238 +/-    0.0000
Ecliptic ZDOT         0.00083949 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   53.93520013 +/-    0.0327
Geocenter to KBO     52.93234009 +/-    0.0436
# Hcoef:  6.02

The following table shows the complete astrometric record for 15HY195. 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 (15HY195) followed by the observatory code and reference code for the source of the astrometry.

2014 04  30.02046  14 05 53.40   -15 16 18.9         15HY195   W84  C~2fcC      
2014 04  30.08936  14 05 53.13   -15 16 17.3   23.2V 15HY195   W84  C~2fcC      
2014 05  01.00777  14 05 49.77   -15 15 56.2         15HY195   W84  C~2fcC      
2014 05  01.07699  14 05 49.51   -15 15 54.5         15HY195   W84  C~2fcC      
2015 04  25.15121  14 10 04.41   -15 16 05.7   23.3V 15HY195   W84  C~2gaG      
2015 04  25.22005  14 10 04.15   -15 16 04.1         15HY195   W84  C~2gaG      
2015 04  26.18124  14 10 00.63   -15 15 42.6         15HY195   W84  C~2gaG      
2015 04  26.25040  14 10 00.37   -15 15 41.1         15HY195   W84  C~2gaG      
2021 05  16.15513  14 30 46.32   -14 52 02.8   23.8V 15HY195   W84  C~8ePX      
2021 05  16.18932  14 30 46.20   -14 52 02.2         15HY195   W84  C~8ePX      
2021 05  16.24460  14 30 46.01   -14 52 01.1         15HY195   W84  C~8ePX      
2021 05  16.27227  14 30 45.90   -14 52 00.6         15HY195   W84  C~8ePX      

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     0.13       0.00     0.01
     2   0.0002      0.00    -0.08       0.00     0.03
     3   0.0027      0.00    -0.00       0.00    -0.07
     4   0.0029      0.00    -0.05       0.00     0.04
     5   0.9860      0.00    -0.02       0.00     0.03
     6   0.9862      0.00    -0.06       0.00     0.09
     7   0.9888      0.00     0.05       0.00    -0.04
     8   0.9890      0.00     0.02       0.00    -0.10
     9   7.0449      0.00     0.07       0.00     0.06
    10   7.0450      0.00     0.04       0.00    -0.01
    11   7.0451      0.00     0.06       0.00    -0.00
    12   7.0452      0.00    -0.16       0.00    -0.05

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.

15HY195    quality flag:3

Type:         4:1EEE    4:1EEE    4:1EEE

axisobj        74.945    74.946    74.945
ecceobj         0.512     0.512     0.512
incobj         22.110    22.110    22.110
qmin           34.850    34.765    34.869
qmax          119.449   119.618   119.575
amean          75.871    75.871    75.874
amin           74.572    74.718    74.565
amax           77.586    77.638    77.629
emean           0.526     0.527     0.526
emin            0.508     0.508     0.508
emax            0.541     0.542     0.542
imean          21.708    21.632    21.736
imin           21.034    20.910    21.068
imax           22.775    22.774    22.775
excite_mean     0.643     0.643     0.643
fracstop        1.000     1.000     1.000
cjmean          2.905     2.905     2.905

libcent 0       273.2     273.7     273.1
libamp  0        58.7      58.4      59.2
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       239.0     249.7     234.3
kozaiamp        180.0     180.0     180.0