Orbit Fit and Astrometric record for 15KY173

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: 15KY173   
# Created Thu Feb 21 02:10:19 2019
# Orbit generated from Bernstein formalism
# Fitting   30 observations of   30
# Arc:   2.50y
# First observation: 2015/02/25
#  Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000068   0.027995   0.000000   0.000657   0.025245   0.000000
# Chi-squared of fit:    10.23 DOF:   54 RMS:  0.10
# Min/Max residuals:    -0.24    0.29
# Exact a, adot, b, bdot, g, gdot:
  1.741986E-05  2.746792E-02  1.035000E-06  6.394358E-04  2.475404E-02 -7.164756E-03
# Covariance matrix:
  1.9892E-13  4.4454E-14 -1.5377E-14  8.5082E-15  1.5274E-13  1.7762E-12
  4.4454E-14  4.8497E-13 -2.4977E-14  2.8805E-14  3.0340E-13  1.2114E-11
 -1.5377E-14 -2.4977E-14  9.9884E-14 -5.8079E-14 -2.7710E-14 -5.8210E-13
  8.5082E-15  2.8805E-14 -5.8079E-14  6.5047E-14  2.2409E-14  8.0354E-13
  1.5274E-13  3.0340E-13 -2.7710E-14  2.2409E-14  3.0137E-13  7.5589E-12
  1.7762E-12  1.2114E-11 -5.8210E-13  8.0354E-13  7.5589E-12  3.6375E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.912646 -125.722969    0.964685    0.032366   -0.205578  2457079.141088
# Heliocentric elements and errors
Epoch:              2457070.5000  =  2015/02/17
Mean Anomaly:          338.67708 +/-     0.028
Argument of Peri:      135.04528 +/-     0.071
Long of Asc Node:      152.69887 +/-     0.003
Inclination:             8.99361 +/-     0.000
Eccentricity:         0.43556026 +/-    0.0007
Semi-Major Axis:     62.73229881 +/-    0.0461
Time of Perihelion: 2467819.7792 +/-       7.3
Perihelion:          35.40860249 +/-    0.0507
Aphelion:            90.05599513 +/-    0.0792
Period (y)              496.8726 +/-      0.55
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -24.20909937 +/-    0.0005
Ecliptic Y          -32.00621520 +/-    0.0007
Ecliptic Z            6.25877281 +/-    0.0001
Ecliptic XDOT         0.00292631 +/-    0.0000
Ecliptic YDOT        -0.00113495 +/-    0.0000
Ecliptic ZDOT        -0.00005281 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   40.61589025 +/-    0.0006
Geocenter to KBO     40.39745301 +/-    0.0009
# Hcoef:  8.85

The following table shows the complete astrometric record for 15KY173. 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 (15KY173) followed by the observatory code and reference code for the source of the astrometry.

2015 02  25.64031  15 36 29.320  -10 11 19.59  25.9r 15KY173   568  C~2lVH      
2015 03  19.63268  15 36 07.703  -10 05 06.16  24.7r 15KY173   568  C~2lVH      
2015 03  22.55230  15 36 01.499  -10 04 08.26  24.8r 15KY173   568  C~2lVH      
2015 04  13.56418  15 34 53.505  -09 56 20.53  24.7r 15KY173   568  C~2lVH      
2015 04  13.60528  15 34 53.330  -09 56 19.70  24.2r 15KY173   568  C~2lVH      
2015 04  18.57429  15 34 33.657  -09 54 31.17  24.3r 15KY173   568  C~2lVH      
2015 05  21.33472  15 32 03.515  -09 43 43.54  24.4r 15KY173   568  C~2lVH      
2015 05  21.37588  15 32 03.322  -09 43 42.82  24.6r 15KY173   568  C~2lVH      
2015 05  21.41717  15 32 03.122  -09 43 42.19  25.0r 15KY173   568  C~2lVH      
2015 05  22.49362  15 31 57.996  -09 43 24.55  24.5r 15KY173   568  C~2lVH      
2015 05  22.51002  15 31 57.905  -09 43 24.27  24.7r 15KY173   568  C~2lVH      
2015 05  25.48424  15 31 43.803  -09 42 37.23  24.8r 15KY173   568  C~2lVH      
2015 06  20.37343  15 29 51.512  -09 37 51.27  25.1r 15KY173   568  C~2lVH      
2015 06  20.41439  15 29 51.374  -09 37 51.04  24.8r 15KY173   568  C~2lVH      
2015 06  23.43462  15 29 40.209  -09 37 33.93  25.0r 15KY173   568  C~2lVH      
2015 07  11.31733  15 28 46.586  -09 37 10.45  25.1r 15KY173   568  C~2lVH      
2015 08  11.34850  15 28 15.969  -09 41 46.85  24.6r 15KY173   568  C~2lVH      
2016 04  03.51011  15 41 49.732  -10 20 06.77  25.3w 15KY173   568  C~2lVH      
2016 04  08.55978  15 41 32.914  -10 18 19.47  25.1w 15KY173   568  C~2lVH      
2016 04  29.44139  15 40 07.853  -10 10 57.70  25.4w 15KY173   568  C~2lVH      
2016 05  04.37647  15 39 45.141  -10 09 18.41  24.9w 15KY173   568  C~2lVH      
2016 05  30.49437  15 37 40.324  -10 01 55.45  25.3w 15KY173   568  C~2lVH      
2016 07  04.30626  15 35 22.196  -09 57 43.63  23.9w 15KY173   568  C~2lVH      
2016 07  05.37457  15 35 19.064  -09 57 43.58  24.9w 15KY173   568  C~2lVH      
2017 03  28.60286  15 48 37.418  -10 42 26.12  25.0w 15KY173   568  C~2lVH      
2017 07  28.29182  15 40 57.815  -10 20 00.38        15KY173   568  C~2lVH      
2017 07  29.35266  15 40 56.672  -10 20 10.37        15KY173   568  C~2lVH      
2017 08  19.26557  15 40 56.087  -10 24 52.36  25.5w 15KY173   568  C~2lVH      
2017 08  25.27346  15 41 03.786  -10 26 41.34  24.8w 15KY173   568  C~2lVH      
2017 08  26.25391  15 41 05.382  -10 26 59.96  24.9w 15KY173   568  C~2lVH      

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    -0.13
  2   0.0602   -398.34    -0.01     287.51    -0.08
  3   0.0682   -501.05     0.09     322.12     0.04
  4   0.1285  -1587.66     0.29     538.79     0.10
  5   0.1286  -1590.37     0.10     538.98    -0.02
  6   0.1422  -1898.53     0.13     575.45     0.09
  7   0.2319  -4208.61    -0.09     675.64    -0.06
  8   0.2320  -4211.55    -0.00     675.66     0.01
  9   0.2321  -4214.58     0.02     675.56    -0.04
 10   0.2351  -4292.42     0.14     674.56     0.00
 11   0.2351  -4293.79    -0.03     674.51    -0.03
 12   0.2432  -4507.58    -0.12     670.28     0.01
 13   0.3141  -6189.24    -0.13     549.17    -0.08
 14   0.3142  -6191.28     0.17     548.91    -0.04
 15   0.3225  -6355.80    -0.13     525.74    -0.03
 16   0.3715  -7131.89    -0.05     357.13     0.04
 17   0.4564  -7504.84    -0.16     -20.77     0.07
 18   1.1030   4722.22    -0.08     594.01     0.02
 19   1.1168   4455.77    -0.12     640.79     0.09
 20   1.1740   3131.41    -0.24     778.25    -0.02
 21   1.1875   2782.09    -0.06     796.53     0.06
 22   1.2590    886.16    -0.22     795.23    -0.11
 23   1.3543  -1156.13     0.15     558.50     0.20
 24   1.3572  -1201.10     0.12     547.60     0.08
 25   2.0861  10890.90    -0.04     669.40    -0.06
 26   2.4193   3975.22    -0.04     422.23     0.09
 27   2.4222   3961.13     0.00     408.58     0.03
 28   2.4795   4018.35     0.11     132.27    -0.05
 29   2.4959   4154.21     0.10      52.67    -0.19
 30   2.4986   4181.45     0.09      40.03     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.

15KY173    quality flag:3

Type:          3:1EE     3:1EE     3:1EE
Type:                              3:1II

axisobj        62.128    62.240    62.018
ecceobj         0.433     0.435     0.432
incobj          9.006     9.006     9.006
qmin           34.488    34.625    34.217
qmax           92.498    92.549    92.639
amean          62.630    62.629    62.631
amin           61.710    61.651    61.772
amax           63.824    63.900    63.791
emean           0.437     0.436     0.439
emin            0.424     0.425     0.424
emax            0.450     0.449     0.453
imean           7.513     8.040     6.635
imin            7.027     7.894     5.712
imax            8.297     8.237     7.983
excite_mean     0.456     0.458     0.454
fracstop        1.000     1.000     1.000
cjmean          3.053     3.051     3.054

libcent 0       277.6     180.3     281.0
libamp  0        46.2     154.1      37.8
libcent 1      -180.0    -180.0     251.6
libamp  1      -180.0    -180.0      96.7
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       187.7     180.6     147.8
kozaiamp         63.2     180.0      32.0