Orbit Fit and Astrometric record for 15KK174

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: 15KK174   
# Created Thu Apr 18 01:10:33 2019
# Orbit generated from Bernstein formalism
# Fitting   23 observations of   23
# Arc:   2.43y
# First observation: 2015/03/19
#  Last observation: 2017/08/24
Preliminary a, adot, b, bdot, g, gdot:
  -0.000029   0.018018  -0.000017  -0.001523   0.021557   0.000000
# Chi-squared of fit:    16.47 DOF:   40 RMS:  0.15
# Min/Max residuals:    -0.54    0.38
# Exact a, adot, b, bdot, g, gdot:
  1.346850E-05  1.800589E-02 -1.663143E-06 -1.568995E-03  2.150899E-02  4.221594E-03
# Covariance matrix:
  2.4979E-13  6.5376E-14 -5.0919E-15 -1.7222E-14  2.5241E-13  5.7034E-12
  6.5376E-14  3.4652E-13  3.2380E-15 -5.1907E-14  3.3951E-13  1.3452E-11
 -5.0919E-15  3.2380E-15  1.2747E-13 -7.9772E-14 -5.3447E-15  4.8584E-13
 -1.7222E-14 -5.1907E-14 -7.9772E-14  1.0946E-13 -5.2998E-14 -3.3298E-12
  2.5241E-13  3.3951E-13 -5.3447E-15 -5.2998E-14  5.4273E-13  1.5475E-11
  5.7034E-12  1.3452E-11  4.8584E-13 -3.3298E-12  1.5475E-11  8.0703E-10
#      lat0       lon0       xBary       yBary       zBary        JD0
    8.456828 -127.733454    0.800510    0.086388   -0.580246  2457101.129378
# Heliocentric elements and errors
Epoch:              2457100.5000  =  2015/03/19
Mean Anomaly:          105.25079 +/-     0.259
Argument of Peri:      350.68623 +/-     0.205
Long of Asc Node:      111.17471 +/-     0.005
Inclination:             9.62945 +/-     0.001
Eccentricity:         0.23916659 +/-    0.0010
Semi-Major Axis:     42.41037735 +/-    0.0222
Time of Perihelion: 2427606.7843 +/-      68.7
Perihelion:          32.26723216 +/-    0.0461
Aphelion:            52.55352254 +/-    0.0510
Period (y)              276.1954 +/-      0.22
# Ecliptic coordinates at JD0 (AU and AU/d)
Ecliptic X          -29.13809207 +/-    0.0010
Ecliptic Y          -36.34333174 +/-    0.0012
Ecliptic Z            6.83728705 +/-    0.0002
Ecliptic XDOT         0.00146596 +/-    0.0000
Ecliptic YDOT        -0.00185201 +/-    0.0000
Ecliptic ZDOT        -0.00011843 +/-    0.0000
# Distances at JD0 (AU)
Heliocenter to KBO   47.08093739 +/-    0.0011
Geocenter to KBO     46.49218950 +/-    0.0016
# Hcoef:  8.44

The following table shows the complete astrometric record for 15KK174. 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 (15KK174) followed by the observatory code and reference code for the source of the astrometry.

2015 03  19.62860  15 28 12.228  -10 09 02.83  24.7r 15KK174   568  C~2lVJ      
2015 03  22.54735  15 28 05.796  -10 08 14.03  24.9r 15KK174   568  C~2lVJ      
2015 04  13.56008  15 26 59.682  -10 01 37.48  24.6r 15KK174   568  C~2lVJ      
2015 04  13.60117  15 26 59.538  -10 01 36.74  24.8r 15KK174   568  C~2lVJ      
2015 04  18.57019  15 26 41.072  -10 00 04.61  26.6r 15KK174   568  C~2lVJ      
2015 05  21.33063  15 24 23.816  -09 50 52.83  24.8r 15KK174   568  C~2lVJ      
2015 05  21.37180  15 24 23.633  -09 50 51.98  24.7r 15KK174   568  C~2lVJ      
2015 05  21.41305  15 24 23.451  -09 50 51.60  24.9r 15KK174   568  C~2lVJ      
2015 05  22.48950  15 24 18.840  -09 50 36.50  24.4r 15KK174   568  C~2lVJ      
2015 05  25.48011  15 24 06.077  -09 49 56.39  24.9r 15KK174   568  C~2lVJ      
2015 06  20.36937  15 22 25.600  -09 45 53.26  25.4r 15KK174   568  C~2lVJ      
2015 06  23.43052  15 22 15.535  -09 45 38.69  25.1r 15KK174   568  C~2lVJ      
2016 04  03.51820  15 31 29.951  -10 25 01.14  25.3w 15KK174   568  C~2lVJ      
2016 04  08.56787  15 31 13.752  -10 23 30.56  25.6w 15KK174   568  C~2lVJ      
2016 04  29.44543  15 29 54.560  -10 17 16.50  25.3w 15KK174   568  C~2lVJ      
2016 05  04.38051  15 29 33.868  -10 15 52.35  25.6w 15KK174   568  C~2lVJ      
2016 05  30.49842  15 27 42.164  -10 09 35.38  24.8w 15KK174   568  C~2lVJ      
2016 05  30.50246  15 27 42.151  -10 09 35.20  25.5w 15KK174   568  C~2lVJ      
2016 07  03.35024  15 25 43.350  -10 06 02.06        15KK174   568  C~2lVJ      
2017 03  30.56791  15 35 39.894  -10 46 25.01        15KK174   568  C~2lVJ      
2017 08  20.27585  15 28 54.928  -10 32 19.94  25.0w 15KK174   568  C~2lVJ      
2017 08  23.26141  15 28 57.991  -10 33 06.44  25.3w 15KK174   568  C~2lVJ      
2017 08  24.24592  15 28 59.186  -10 33 21.69  25.5w 15KK174   568  C~2lVJ      

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    -0.05       0.00     0.11
  2   0.0080   -104.09     0.00      23.79     0.11
  3   0.0683  -1148.31    -0.02     166.03    -0.03
  4   0.0684  -1150.55     0.08     166.22    -0.03
  5   0.0820  -1437.67    -0.00     187.73    -0.14
  6   0.1717  -3539.55     0.08     216.59    -0.07
  7   0.1718  -3542.38    -0.03     216.74     0.18
  8   0.1719  -3545.08    -0.01     216.43    -0.02
  9   0.1748  -3614.86     0.18     214.01     0.11
 10   0.1830  -3807.59     0.12     205.64    -0.06
 11   0.2539  -5306.99    -0.20      68.31    -0.02
 12   0.2623  -5454.76    -0.01      44.97     0.08
 13   1.0428   3064.50    -0.07    -210.79    -0.04
 14   1.0566   2810.56     0.06    -181.49     0.06
 15   1.1138   1585.75    -0.05    -105.79     0.01
 16   1.1273   1269.02    -0.03     -99.41    -0.09
 17   1.1988   -422.03     0.03    -141.40     0.03
 18   1.1988   -422.26     0.06    -141.27     0.17
 19   1.2915  -2174.54    -0.27    -370.61    -0.54
 20   2.0313   6953.74    -0.03    -560.05    -0.10
 21   2.4220    955.71     0.38   -1198.17     0.29
 22   2.4302   1010.96    -0.12   -1232.09    -0.26
 23   2.4329   1031.80    -0.09   -1242.53     0.26

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.

15KK174    quality flag:3

Type:          5:3EE     5:3EE     5:3EE

axisobj        42.063    42.124    42.004
ecceobj         0.240     0.243     0.238
incobj          9.623     9.623     9.623
qmin           31.722    31.491    31.766
qmax           53.323    53.675    53.318
amean          42.326    42.326    42.326
amin           41.953    41.880    41.934
amax           42.782    42.832    42.779
emean           0.235     0.239     0.233
emin            0.222     0.223     0.221
emax            0.248     0.255     0.247
imean           7.927     7.676     7.923
imin            7.598     7.094     7.543
imax            8.195     8.381     8.128
excite_mean     0.273     0.274     0.271
fracstop        1.000     1.000     1.000
cjmean          2.994     2.993     2.995

libcent 0       180.2     179.0     180.5
libamp  0        23.9      62.5      35.2
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       199.9     221.9     201.5
kozaiamp        180.0     128.5     179.9