Orbit Fit and Astrometric record for 15KU173

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: 15KU173   
# Created Mon Apr 22 01:10:07 2019
# Orbit generated from Bernstein formalism
# Fitting   41 observations of   41
# Arc:   3.24y
# First observation: 2014/05/29
#  Last observation: 2017/08/26
Preliminary a, adot, b, bdot, g, gdot:
   0.000152   0.037134  -0.000054  -0.008055   0.032028   0.000000
# Chi-squared of fit:     3.32 DOF:   76 RMS:  0.05
# Min/Max residuals:    -0.13    0.13
# Exact a, adot, b, bdot, g, gdot:
  1.830898E-05  3.733591E-02 -3.686064E-06 -8.128871E-03  3.197757E-02 -4.657622E-03
# Covariance matrix:
  1.6287E-13 -1.9164E-13 -1.6308E-14  3.3304E-14 -5.1347E-14 -1.2724E-12
 -1.9164E-13  3.8909E-13  4.1466E-14 -8.5897E-14  8.2675E-14  3.2478E-12
 -1.6308E-14  4.1466E-14  1.1086E-13 -6.6639E-14  9.8824E-15  3.9172E-13
  3.3304E-14 -8.5897E-14 -6.6639E-14  6.6800E-14 -1.8062E-14 -8.1226E-13
 -5.1347E-14  8.2675E-14  9.8824E-15 -1.8062E-14  1.1483E-13  7.4937E-13
 -1.2724E-12  3.2478E-12  3.9172E-13 -8.1226E-13  7.4937E-13  3.0690E-11
#      lat0       lon0       xBary       yBary       zBary        JD0
    6.912394 -127.657324   -0.271112    0.117722   -0.970570  2456806.851688
# Heliocentric elements and errors
Epoch:              2456800.5000  =  2014/05/23
Mean Anomaly:          335.34898 +/-     0.023
Argument of Peri:      189.01173 +/-     0.040
Long of Asc Node:       80.84787 +/-     0.001
Inclination:            14.04399 +/-     0.000
Eccentricity:         0.21169228 +/-    0.0001
Semi-Major Axis:     39.40551402 +/-    0.0023
Time of Perihelion: 2462987.3037 +/-       5.9
Perihelion:          31.06367075 +/-    0.0041
Aphelion:            47.74735730 +/-    0.0046
Period (y)              247.3681 +/-      0.02
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -19.35037343 +/-    0.0002
Ecliptic Y          -25.51554363 +/-    0.0003
Ecliptic Z            3.76356714 +/-    0.0000
Ecliptic XDOT         0.00271612 +/-    0.0000
Ecliptic YDOT        -0.00170948 +/-    0.0000
Ecliptic ZDOT        -0.00073879 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   32.24351650 +/-    0.0002
Geocenter to KBO     31.27192040 +/-    0.0003
# Hcoef:  8.42

The following table shows the complete astrometric record for 15KU173. 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 (15KU173) followed by the observatory code and reference code for the source of the astrometry.

2014 05  29.35091  15 26 56.584  -11 39 56.79  23.4r 15KU173   568  C~2lVH      
2014 05  29.38978  15 26 56.353  -11 39 56.12  23.4r 15KU173   568  C~2lVH      
2014 05  29.42862  15 26 56.114  -11 39 55.71  23.2r 15KU173   568  C~2lVH      
2014 05  30.45852  15 26 50.066  -11 39 41.50  23.1r 15KU173   568  C~2lVH      
2014 05  31.37479  15 26 44.731  -11 39 29.38  23.2r 15KU173   568  C~2lVH      
2014 06  21.35408  15 24 53.694  -11 36 19.50  23.5r 15KU173   568  C~2lVH      
2014 06  21.39293  15 24 53.515  -11 36 19.28  23.4r 15KU173   568  C~2lVH      
2014 07  19.27038  15 23 19.406  -11 37 20.65  23.4r 15KU173   568  C~2lVH      
2015 02  23.63194  15 41 23.908  -13 03 49.44  23.7r 15KU173   568  C~2lVH      
2015 03  19.59128  15 41 00.193  -12 59 34.69  23.4r 15KU173   568  C~2lVH      
2015 03  22.51359  15 40 52.604  -12 58 50.92  23.2r 15KU173   568  C~2lVH      
2015 04  12.50860  15 39 32.507  -12 52 44.38  23.4r 15KU173   568  C~2lVH      
2015 04  12.54955  15 39 32.296  -12 52 43.59  23.2r 15KU173   568  C~2lVH      
2015 04  18.53176  15 39 02.539  -12 50 48.67  23.2r 15KU173   568  C~2lVH      
2015 05  17.40428  15 36 14.363  -12 41 49.83  23.2r 15KU173   568  C~2lVH      
2015 05  17.44599  15 36 14.114  -12 41 49.25  23.3r 15KU173   568  C~2lVH      
2015 05  17.49805  15 36 13.783  -12 41 48.16  23.3r 15KU173   568  C~2lVH      
2015 05  24.38965  15 35 31.476  -12 39 58.01  23.3r 15KU173   568  C~2lVH      
2015 05  24.43575  15 35 31.190  -12 39 57.35  23.2r 15KU173   568  C~2lVH      
2015 05  24.47682  15 35 30.937  -12 39 56.67  23.2r 15KU173   568  C~2lVH      
2015 05  26.46493  15 35 18.832  -12 39 27.26  23.3r 15KU173   568  C~2lVH      
2015 06  18.36386  15 33 09.516  -12 35 19.64  23.3r 15KU173   568  C~2lVH      
2015 06  18.40481  15 33 09.306  -12 35 19.40  23.4r 15KU173   568  C~2lVH      
2015 06  21.37945  15 32 54.601  -12 35 01.83  23.4r 15KU173   568  C~2lVH      
2015 07  10.41516  15 31 37.656  -12 34 42.77  23.9r 15KU173   568  C~2lVH      
2015 07  18.33993  15 31 15.852  -12 35 24.96  23.5r 15KU173   568  C~2lVH      
2016 02  06.63721  15 48 52.865  -14 00 08.54  23.7w 15KU173   568  C~2lVH      
2016 03  15.63093  15 49 14.130  -13 57 03.81  23.6w 15KU173   568  C~2lVH      
2016 03  15.63618  15 49 14.113  -13 57 03.79  23.7w 15KU173   568  C~2lVH      
2016 04  03.56283  15 48 19.029  -13 52 35.11  23.7w 15KU173   568  C~2lVH      
2016 04  08.61237  15 47 58.104  -13 51 11.17  23.5w 15KU173   568  C~2lVH      
2016 04  09.55630  15 47 53.944  -13 50 55.10  23.6w 15KU173   568  C~2lVH      
2016 04  29.51356  15 46 10.645  -13 45 00.17  23.4w 15KU173   568  C~2lVH      
2016 05  04.48619  15 45 41.452  -13 43 31.72  23.4w 15KU173   568  C~2lVH      
2016 05  30.46201  15 43 01.931  -13 36 44.18  23.4w 15KU173   568  C~2lVH      
2016 07  04.29818  15 40 01.672  -13 32 42.36  23.6w 15KU173   568  C~2lVH      
2016 07  05.36646  15 39 57.542  -13 32 42.57  23.6w 15KU173   568  C~2lVH      
2017 03  30.58199  15 56 52.226  -14 50 14.10  23.6w 15KU173   568  C~2lVH      
2017 08  19.27024  15 47 00.000  -14 37 15.02  23.7w 15KU173   568  C~2lVH      
2017 08  25.27821  15 47 08.655  -14 39 13.67  23.6w 15KU173   568  C~2lVH      
2017 08  26.25868  15 47 10.505  -14 39 34.31  23.7w 15KU173   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    -0.07
  2   0.0001     -3.45     0.03      -0.19     0.07
  3   0.0002     -6.96    -0.03      -0.67    -0.08
  4   0.0030    -96.55    -0.10      -8.95     0.06
  5   0.0055   -175.48    -0.06     -16.67    -0.00
  6   0.0630  -1802.75    -0.01    -239.15    -0.07
  7   0.0631  -1805.35     0.05    -239.60    -0.01
  8   0.1394  -3128.80     0.04    -645.52    -0.09
  9   0.7400  13567.16     0.01   -1814.34     0.10
 10   0.8056  13168.66    -0.01   -1647.79    -0.04
 11   0.8136  13050.07     0.02   -1631.31    -0.01
 12   0.8711  11821.13     0.04   -1551.27    -0.00
 13   0.8712  11817.93    -0.13   -1551.23    -0.03
 14   0.8876  11366.50     0.01   -1542.62     0.04
 15   0.9666   8842.63    -0.08   -1605.85    -0.04
 16   0.9667   8838.95     0.13   -1606.16    -0.11
 17   0.9669   8833.98     0.01   -1606.27     0.08
 18   0.9857   8205.43     0.02   -1647.97     0.08
 19   0.9859   8201.21     0.04   -1648.34     0.04
 20   0.9860   8197.44     0.05   -1648.57     0.10
 21   0.9914   8018.13    -0.04   -1662.63    -0.01
 22   1.0541   6119.26    -0.01   -1879.62     0.03
 23   1.0542   6116.22     0.02   -1880.13     0.00
 24   1.0624   5902.93    -0.08   -1915.33     0.01
 25   1.1145   4804.95     0.07   -2171.01     0.02
 26   1.1362   4505.55    -0.00   -2289.86     0.04
 27   1.6928  20770.35     0.03   -3597.96     0.00
 28   1.7968  21032.27     0.07   -3346.58     0.04
 29   1.7968  21032.02    -0.02   -3346.61    -0.02
 30   1.8486  20181.32     0.03   -3266.47    -0.02
 31   1.8625  19862.45    -0.01   -3254.00    -0.04
 32   1.8650  19799.21    -0.02   -3252.15    -0.06
 33   1.9197  18239.81    -0.02   -3250.68     0.04
 34   1.9333  17802.15    -0.02   -3262.39     0.00
 35   2.0044  15430.46    -0.07   -3404.23    -0.06
 36   2.0998  12806.34     0.03   -3785.31     0.02
 37   2.1027  12747.64     0.02   -3799.74     0.03
 38   2.8370  28339.27     0.01   -4992.53     0.02
 39   3.2250  19673.27     0.01   -6152.34    -0.07
 40   3.2414  19824.25    -0.07   -6239.81    -0.03
 41   3.2441  19855.42     0.02   -6253.88     0.03

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.

15KU173    quality flag:3

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

axisobj        39.176    39.182    39.170
ecceobj         0.210     0.210     0.210
incobj         14.045    14.045    14.045
qmin           30.170    30.161    30.157
qmax           49.111    49.280    49.107
amean          39.455    39.455    39.455
amin           39.110    39.097    39.111
amax           39.852    39.864    39.857
emean           0.202     0.202     0.202
emin            0.167     0.168     0.167
emax            0.235     0.236     0.235
imean          13.378    13.377    13.379
imin           12.381    12.384    12.378
imax           14.654    14.651    14.654
excite_mean     0.308     0.308     0.308
fracstop        1.000     1.000     1.000
cjmean          2.944     2.944     2.944

libcent 0       179.9     180.5     180.2
libamp  0        36.0      38.4      35.1
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       180.2     180.1     180.3
kozaiamp        180.0     180.0     180.0